diff --git a/Dockerfile b/Dockerfile index 0d0b3bfa..755f551a 100644 --- a/Dockerfile +++ b/Dockerfile @@ -16,11 +16,11 @@ WORKDIR /app COPY pyproject.toml uv.lock README.md . -RUN uv sync --locked --no-dev --no-install-project --no-cache +RUN uv sync --locked --no-dev --no-install-project --no-cache --extra postgres COPY . . -RUN uv sync --locked --no-dev --no-editable --no-cache +RUN uv sync --locked --no-dev --no-editable --no-cache --extra postgres ENV PYTHONUNBUFFERED=1 ENV VIRTUAL_ENV=/app/.venv diff --git a/docker-compose.yml b/docker-compose.yml index cddd583a..1d7077a3 100644 --- a/docker-compose.yml +++ b/docker-compose.yml @@ -352,6 +352,29 @@ services: profiles: - qdrant + # Centralized Postgres backend for token storage. Used by: + # 1. Integration tests gated on @pytest.mark.postgres — they read + # TEST_DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp. + # 2. Manual smoke testing of the HA (multi-replica) deployment story. + # Bring up with: docker compose --profile postgres up -d postgres-test + # See ADR-026 for the pluggable-database-backend design. + postgres-test: + image: docker.io/library/postgres:16-alpine@sha256:16bc17c64a573ef34162af9298258d1aec548232985b33ed7b1eac33ba35c229 + restart: unless-stopped + environment: + POSTGRES_USER: mcp + POSTGRES_PASSWORD: mcp + POSTGRES_DB: mcp + ports: + - 127.0.0.1:5433:5432 + healthcheck: + test: ["CMD-SHELL", "pg_isready -U mcp -d mcp"] + interval: 5s + timeout: 3s + retries: 10 + profiles: + - postgres + volumes: nextcloud: db: diff --git a/docs/ADR-026-pluggable-database-backend.md b/docs/ADR-026-pluggable-database-backend.md new file mode 100644 index 00000000..cf249eef --- /dev/null +++ b/docs/ADR-026-pluggable-database-backend.md @@ -0,0 +1,296 @@ +# ADR-026: Pluggable database backend (DATABASE_URL) + +## Status + +Accepted — 2026-05-16 + +## Context + +`RefreshTokenStorage` (in `nextcloud_mcp_server/auth/storage.py`) holds all +of the MCP server's persistent state: refresh tokens, OAuth client +credentials, OAuth sessions, browser sessions, app passwords, login-flow +sessions, audit logs, and webhook registrations. Until this ADR it was +backed by a single SQLite file, with the path configured by +`TOKEN_STORAGE_DB`. + +This works well for single-user deployments but blocks horizontal scaling +in Kubernetes: + +- Every pod needs its own PVC (ReadWriteOnce) or a ReadWriteMany volume. +- Tokens stored on pod A are invisible to pod B, so a Service can only + route traffic to one pod at a time. +- Restart / re-deploy cycles either drop the volume (token loss) or + require coordinated PVC handling. +- Backup, encryption-at-rest, and multi-region replication become + per-pod concerns rather than centrally managed DB concerns. + +We needed a way for pods to be stateless and share a centralized store +without giving up the zero-config SQLite path that single-user installs and +local development rely on. + +## Decision + +Introduce a `DATABASE_URL` setting that accepts any SQLAlchemy async URL, +with `sqlite+aiosqlite:///...` remaining the default. The runtime keeps a +single linear migration history and a single `RefreshTokenStorage` class — +the backend is selected purely by the URL. + +### Resolution order + +`get_database_url()` (in `nextcloud_mcp_server/config.py`) returns: + +1. `DATABASE_URL` if set — wins over everything. +2. Otherwise `sqlite+aiosqlite:///{get_token_db_path()}`, so the legacy + `TOKEN_STORAGE_DB` env var and the process-local ephemeral tempfile + fallback both keep working unchanged. + +### Why SQLAlchemy Core + async engine, not an ABC with parallel drivers + +Two alternatives were considered: + +| Option | Why rejected | +|---|---| +| Define a `Storage` ABC with `SQLiteStorage` (aiosqlite) and `PostgresStorage` (asyncpg) implementations | Doubles the surface area — every schema change has to land in two backends, with two sets of migrations, two SQL dialects, two upsert idioms. Diverges over time. | +| Switch to a full SQLAlchemy ORM (declarative models) | Larger refactor; the existing explicit-SQL style is intentional and well-understood by reviewers. | +| **Keep `RefreshTokenStorage` and put SQLAlchemy Core under it** *(chosen)* | One method body per operation, one migration history (Alembic is already SQLAlchemy-based). The URL drives dialect, pool, and DDL. | + +A thin compatibility shim (`_DBConn` / `_Cursor` / `_Row` in `storage.py`) +adapts the `async with aiosqlite.connect(...) as db: async with +db.execute(...) as cursor: ...` idiom to SQLAlchemy `AsyncEngine` / +`AsyncConnection`. Existing method bodies needed only their connection +context-manager swapped; `?` placeholders are rewritten to named binds on +the fly. The seven `INSERT OR REPLACE` statements were rewritten as +portable `INSERT ... ON CONFLICT (...) DO UPDATE` (SQLite ≥ 3.24, Postgres +≥ 9.5; we already require SQLite ≥ 3.35 elsewhere). + +### Distribution: asyncpg is an optional extra, bundled in Docker + +`asyncpg` carries a compiled C extension (~5 MB plus a build toolchain on +source installs) — too heavy a default for the +`pip install nextcloud-mcp-server` audience, the majority of whom run the +SQLite path. It is shipped as a PyPI optional dependency:: + + pip install 'nextcloud-mcp-server[postgres]' + +The published Docker image runs `uv sync --extra postgres` so the +container always has the driver, matching the HA-deployment audience +that exercises the Postgres backend. When `DATABASE_URL=postgresql+asyncpg://...` +is set on a venv without the extra installed, `RefreshTokenStorage` +raises a clear actionable error before the engine is built — operators +see "install with `[postgres]` extra" rather than a generic +`ModuleNotFoundError: No module named 'asyncpg'`. + +### Alembic env.py runs the async engine inside a worker thread + +`nextcloud_mcp_server/alembic/env.py` uses +`async_engine_from_config(...)` + `anyio.run(run_async_migrations)`, and +the runtime invokes it from `RefreshTokenStorage.initialize()` via +`anyio.to_thread.run_sync(upgrade_database, ...)`. This is intentional: + +- Alembic wants a synchronous entry point (`upgrade_database()`), but + `async_engine_from_config` returns an async engine. +- Running `anyio.run()` directly inside an already-running event loop + would deadlock; we have to be on a different thread. +- `to_thread.run_sync` puts the call on a worker thread, which has no + running event loop — `anyio.run()` is then free to spin up its own. + +The pattern is non-obvious; this note exists so a future maintainer +doesn't try to "simplify" it back into the main loop. + +### Concurrency model and pool sizing + +The reviewer's natural reaction to seeing `DATABASE_POOL_SIZE=10` (the +round-2 default) was: *isn't 1 connection enough for an MCP server?* +This subsection records why a small pool is right, why 1 is not the +target default, and what the workload actually looks like. + +**asyncpg connection semantics.** Each asyncpg connection is +**single-flight** — only one query can be in flight at a time on a +given connection. SQLAlchemy serializes additional requests in the +pool queue. So the question is never "how many requests does the MCP +server handle" but "how many concurrent storage operations are in +flight at the peak". + +**MCP storage workload shape.** Each MCP tool call typically performs +1–3 storage operations: a token lookup (`get_refresh_token` or +`get_app_password`), maybe an audit-log write, occasionally a session +update. Lookups are sub-millisecond point queries; writes are short. +The hot path is read-mostly. No long-running transactions, no batch +loads. + +**Why not 1?** A single-user (homelab) deployment genuinely works on +`pool_size=1, max_overflow=2`. But the default ships for multi-user +OAuth deployments where ≥2 concurrent client requests are normal; on +`pool_size=1` those serialize on a single connection and you measure +a latency cliff. The defaults `pool_size=2, max_overflow=5` (max 7 +per pod) cover typical multi-user MCP burst with two-replica +headroom. With 3 k8s replicas the total is 21 connections — well +under managed-Postgres `max_connections=100` (RDS, CNPG default). + +**How to tune.** `DATABASE_POOL_SIZE` / `DATABASE_MAX_OVERFLOW` env +vars adjust the per-pod pool live (server restart). The startup +``Postgres engine ready: pool_size=N max_overflow=M (per-pod max K +connections)`` log line surfaces the active sizing so operators can +see the per-replica footprint at a glance. For a fleet of N replicas, +estimate worst-case Postgres connection count as +`N × (pool_size + max_overflow)` and stay comfortably below the +server's `max_connections`. + +### Concurrent migrations across pods + +When `replicas: N` rolling-update restarts, multiple pods race +`RefreshTokenStorage.initialize()` simultaneously. Alembic's +version-table UPDATE isn't write-locked across connections by +default; without coordination, two pods can both observe +"no `alembic_version` table" and both try to apply migrations from +scratch — the second one crashes with `relation … already exists`. + +We serialize this with a session-level Postgres advisory lock +(`SELECT pg_advisory_lock(:lock_id)`) acquired in `_migration_lock()` +and held across BOTH the schema inspection and the migration call. +The lock ID is a stable 64-bit integer derived from +`sha256("nextcloud-mcp-server:migrations")[:8]` so we can't collide +with other apps that happen to share the same Postgres instance. +The second pod blocks at the advisory-lock call until the first pod +finishes; it then re-inspects the schema, sees the now-populated +`alembic_version` table, and takes the no-op upgrade fast path. + +SQLite needs no equivalent: file-level locking serializes writes +natively, so the second process waits on the file lock and then +sees the migrated schema. Covered by +`tests/integration/test_storage_postgres.py::test_concurrent_initialize_serialized_by_advisory_lock`. + +### TLS for the Postgres backend + +Two settings mirror the existing `NEXTCLOUD_VERIFY_SSL` / +`NEXTCLOUD_CA_BUNDLE` pattern: `DATABASE_VERIFY_SSL` and +`DATABASE_CA_BUNDLE`. `get_database_ssl()` (in `nextcloud_mcp_server/config.py`) +returns the value to pass to asyncpg via SQLAlchemy's `connect_args={"ssl": ...}`. + +The default is deliberately **less strict than the Nextcloud HTTPS +default**: `DATABASE_VERIFY_SSL` defaults to `None` rather than `True`. +When both env vars are unset we omit the `ssl` kwarg entirely and asyncpg's +default (`prefer`) applies — TLS if the server offers it, no certificate +validation. The reasoning: + +- Cluster-internal Postgres (CNPG via a Service, RDS over a private VPC, + PgBouncer sidecar) is the common HA pattern and frequently runs without + TLS or with cert hostnames asyncpg wouldn't match anyway. +- The HTTPS analogy doesn't carry over: the Nextcloud client talks to + *external* hostnames over public networks where verify-full is the + right default. The database client talks to a controlled peer. +- Just-shipped PR #798 had no TLS knobs and worked against cluster-local + Postgres-test; flipping the default to `True` here would break that + flow on upgrade. + +Operators in production with a managed Postgres opt in with +`DATABASE_VERIFY_SSL=true`. Homelab operators with a private CA set +`DATABASE_CA_BUNDLE=/path/to/ca.pem` (which implies `verify=true`). +`DATABASE_VERIFY_SSL=false` is the escape hatch for incident response — +it wins over `DATABASE_CA_BUNDLE` so an operator can quickly silence +cert errors without editing the secret store. + +### Encryption stays in Python (Fernet), not the DB + +The DB only ever sees ciphertext for sensitive columns +(`encrypted_token`, `encrypted_client_secret`, `encrypted_password`, +`encrypted_poll_token`). The Fernet key remains a `TOKEN_ENCRYPTION_KEY` +env var, applied in Python before INSERT and after SELECT. This means: + +- Switching backends does not invalidate or re-key existing data. +- Postgres-level features like `pgcrypto` are not required. +- Operators rotating the encryption key still go through the existing + Python path. + +### DDL portability + +All Alembic migrations were rewritten from raw `op.execute("CREATE TABLE +...")` strings to `op.create_table()` / `op.create_index()` calls with +SQLAlchemy types. Notable choices: + +- All `*_at` / expiration / timestamp columns use `sa.BigInteger` — + Postgres `INTEGER` is 32-bit and unix epochs are already past that range. + SQLite treats `BIGINT` and `INTEGER` identically (dynamic typing) so + this is backwards compatible. +- `BLOB` → `sa.LargeBinary` (becomes `BYTEA` on Postgres). +- `BOOLEAN DEFAULT FALSE` → `sa.Boolean, server_default=sa.false()`. +- Existing SQLite deployments are at revision `006` and skip the + rewritten migrations entirely — content rewrites are safe. + +### No data migration, no shipped Postgres + +Two scope decisions worth recording: + +1. **Clean cutover, no SQLite → Postgres data migration tool.** Tokens + are reissued on the next login; webhooks re-register on the next sync + tick. Acceptable because the ephemeral-default already implies this, + and the data being preserved (audit logs, OAuth sessions) is either + short-lived or reconstructible. +2. **Bring-your-own database.** The MCP server consumes a + `DATABASE_URL`; it does not provision Postgres itself. Operators use + CNPG, RDS, the project's existing Helm chart with a sub-chart, etc. + The `postgres-test` service in `docker-compose.yml` exists only for + integration tests and manual HA smoke testing — it is gated on the + `postgres` profile and is not the recommended production pattern. + +### CLI changes + +The `nextcloud-mcp-server db {upgrade,downgrade,current,history}` commands +gain a `--database-url / -u` flag (env `DATABASE_URL`) alongside the +existing `--database-path / -d` (env `TOKEN_STORAGE_DB`). `-u` wins over +`-d`; both fall back to `get_database_url()`. + +## Consequences + +### Positive + +- MCP server pods become stateless. A Kubernetes Deployment can run with + `replicas: 3` behind a Service, with all pods pointed at the same + Postgres URL — tokens written by pod A are immediately visible to pod B. +- Centralized DB operations (backup, restore, replication, encryption at + rest, monitoring) are handled by the operator's existing Postgres + infrastructure rather than duplicated per-pod. +- No regression for single-user / local-development / docker-compose + installs — the SQLite tempfile path is unchanged and remains the default + when `DATABASE_URL` is unset. +- Test coverage doubles automatically: every test that uses the + `temp_storage` fixture now runs against both SQLite and Postgres when + `TEST_DATABASE_URL` is exported. + +### Negative + +- One more thing operators have to think about for HA deployments + (Postgres connection string, credentials secret, network policies). +- Adds SQLAlchemy + asyncpg to the runtime dependency set. SQLAlchemy was + already transitively present via Alembic; asyncpg is genuinely new. +- The compatibility shim in `storage.py` is a small piece of bespoke code + that future contributors need to understand. The alternative — rewriting + every method body to SQLAlchemy idioms — was rejected as too risky for + this PR but might be revisited. + +### Neutral + +- The Alembic migration history was content-rewritten but its revision + graph is unchanged (still `001 → 006`), so existing SQLite deployments + do not re-run anything. +- `TOKEN_STORAGE_DB` still works exactly as before; deployments that + already set it require no changes. + +## Related + +- [ADR-022 Login Flow v2](ADR-022-deployment-mode-consolidation.md) — + defines the per-user app password storage that this ADR centralizes. +- [ADR-002 Vector sync authentication](ADR-002-vector-sync-authentication.md) + — explains the offline-access tokens that benefit most from HA storage. + +## Verification + +1. `uv run pytest tests/unit/` — SQLite path unchanged (1012 tests). +2. `docker compose --profile postgres up -d postgres-test` then + `TEST_DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp uv run pytest tests/unit/test_app_password_storage.py tests/unit/test_webhook_storage.py` + — every test runs once per backend. +3. Manual end-to-end smoke against `mcp-login-flow` with a Postgres URL + (commands in `/home/chris/.claude/plans/spicy-enchanting-flurry.md` → + Verification). +4. k8s HA validation (after merge in `homelab-argocd`): `replicas: 3`, + confirm session continuity through the Service. diff --git a/docs/configuration.md b/docs/configuration.md index 63577c9c..bb037d84 100644 --- a/docs/configuration.md +++ b/docs/configuration.md @@ -118,6 +118,73 @@ See [Login Flow v2](login-flow-v2.md) for full setup, scope reference, and troub --- +## Centralized Token Storage (DATABASE_URL, Optional) + +By default the MCP server stores tokens / sessions / app passwords in a +local SQLite file (`TOKEN_STORAGE_DB`, falling back to a per-process +tempfile). For HA Kubernetes deployments where you need multiple +stateless pods to share state, point the server at a centralized +database via `DATABASE_URL`. + +```env +# Centralized Postgres backend (HA k8s deployments) +DATABASE_URL=postgresql+asyncpg://mcp:secret@postgres.svc.cluster.local:5432/mcp +TOKEN_ENCRYPTION_KEY= +``` + +| Variable | Required | Description | +|----------|----------|-------------| +| `DATABASE_URL` | Optional | SQLAlchemy async URL for any supported backend. When set, wins over `TOKEN_STORAGE_DB`. Primary supported targets: `postgresql+asyncpg://...` (recommended for HA) and `sqlite+aiosqlite:///...` (development). | +| `TOKEN_STORAGE_DB` | Optional | Legacy SQLite-only path. Used when `DATABASE_URL` is unset. Falls back to a per-process ephemeral tempfile when both are unset. | +| `DATABASE_VERIFY_SSL` | Optional | TLS verification toggle for the Postgres backend. Unset (default) → asyncpg's `prefer` mode (TLS if offered, no verification — keeps cluster-internal Postgres working). `true` → full cert verification. `false` → silence cert errors (homelab / self-signed). | +| `DATABASE_CA_BUNDLE` | Optional | Path to a PEM file containing a private CA. Implies `DATABASE_VERIFY_SSL=true`. Use this for self-hosted Postgres signed by your homelab CA instead of disabling verification. | +| `DATABASE_POOL_SIZE` | Optional (default `2`) | Per-pod SQLAlchemy connection pool size for the Postgres backend. asyncpg connections are single-flight, so this only needs to cover concurrent storage ops (not concurrent tool calls). See [ADR-026 § Concurrency model and pool sizing](ADR-026-pluggable-database-backend.md). | +| `DATABASE_MAX_OVERFLOW` | Optional (default `5`) | Per-pod burst connections beyond `DATABASE_POOL_SIZE`. Max per-pod = `pool_size + max_overflow` (default 7). Set to `0` for a hard cap. With 3 replicas the default totals 21 connections — well under managed-Postgres `max_connections=100`. | + +Operators with very high concurrency (many MCP clients per pod, or +expensive Nextcloud round-trips holding storage locks) should tune these +up; single-user / homelab deployments can drop to `DATABASE_POOL_SIZE=1 +DATABASE_MAX_OVERFLOW=2` for the smallest possible footprint. The +server logs the configured sizes at startup so over-allocation is +visible without grepping config. + +Homelab example (self-signed Postgres with a private CA): + +```env +DATABASE_URL=postgresql+asyncpg://mcp:secret@pg.lan:5432/mcp +DATABASE_CA_BUNDLE=/etc/ssl/certs/homelab-ca.pem +TOKEN_ENCRYPTION_KEY= +``` + +Notes: + +- **PyPI extra required.** The `asyncpg` driver is an optional extra so + the default `pip install nextcloud-mcp-server` stays lean. Install + with `pip install 'nextcloud-mcp-server[postgres]'` when using a + Postgres URL. The Docker image bundles it by default. When + `DATABASE_URL=postgresql+asyncpg://...` is set without the extra, + the server fails fast with a clear actionable error. +- **Bring-your-own DB.** The MCP server doesn't provision the database; + it just consumes the URL. Use CNPG, RDS, your existing Helm chart's + Postgres sub-chart, etc. +- **Encryption stays in the app.** `TOKEN_ENCRYPTION_KEY` (Fernet) is + applied in Python; the database only ever sees ciphertext for + sensitive columns. You don't need `pgcrypto`. +- **Schema is managed automatically.** On startup the server runs + Alembic migrations against the configured backend. Existing SQLite + deployments are stamped at the current revision and skip re-execution. +- **No data migration tool.** Moving from SQLite to Postgres is a clean + cutover — tokens are reissued on the next login, webhooks + re-register on the next sync tick. +- **Testing a Postgres backend locally:** `docker compose --profile + postgres up -d postgres-test` then export + `DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp`. + +See [ADR-026 Pluggable database backend](ADR-026-pluggable-database-backend.md) +for the architecture rationale. + +--- + ## SSL/TLS Configuration (Optional) If your Nextcloud instance uses a self-signed certificate or a private CA (common with reverse proxies like Traefik or Caddy), the MCP server will reject the connection by default. Use these settings to configure certificate verification. diff --git a/nextcloud_mcp_server/alembic/versions/20251217_2200_001_initial_schema.py b/nextcloud_mcp_server/alembic/versions/20251217_2200_001_initial_schema.py index 3f1110c0..849e81da 100644 --- a/nextcloud_mcp_server/alembic/versions/20251217_2200_001_initial_schema.py +++ b/nextcloud_mcp_server/alembic/versions/20251217_2200_001_initial_schema.py @@ -8,12 +8,19 @@ This migration creates the initial database schema including: - registered_webhooks: Webhook registration tracking (both OAuth and BasicAuth) - schema_version: Legacy schema version tracking (deprecated, use alembic_version) +Uses Alembic's portable schema-DDL helpers (``op.create_table`` / +``op.create_index``) with SQLAlchemy types so the DDL is emitted correctly +for both SQLite (BLOB / INTEGER PRIMARY KEY AUTOINCREMENT) and Postgres +(BYTEA / SERIAL). See ADR-026. + Revision ID: 001 Revises: Create Date: 2025-12-17 22:00:00.000000 """ +import sqlalchemy as sa + from alembic import op # revision identifiers, used by Alembic. @@ -24,143 +31,111 @@ depends_on = None def upgrade() -> None: - """Create initial database schema.""" + """Create initial database schema. - # Refresh tokens table (OAuth mode only, for background jobs) - op.execute( - """ - CREATE TABLE IF NOT EXISTS refresh_tokens ( - user_id TEXT PRIMARY KEY, - encrypted_token BLOB NOT NULL, - expires_at INTEGER, - created_at INTEGER NOT NULL, - updated_at INTEGER NOT NULL, - -- ADR-004 Progressive Consent fields - flow_type TEXT DEFAULT 'hybrid', - token_audience TEXT DEFAULT 'nextcloud', - provisioned_at INTEGER, - provisioning_client_id TEXT, - scopes TEXT, - -- Browser session profile cache - user_profile TEXT, - profile_cached_at INTEGER + All ``*_at`` / expiration / timestamp columns use :class:`sa.BigInteger` + so Postgres allocates BIGINT (8-byte) and unix epoch values don't + overflow the 32-bit int32 INTEGER range on long-lived sessions. SQLite + treats BIGINT and INTEGER identically (dynamic typing), so this is + backwards compatible. + """ + + op.create_table( + "refresh_tokens", + sa.Column("user_id", sa.Text, primary_key=True), + sa.Column("encrypted_token", sa.LargeBinary, nullable=False), + sa.Column("expires_at", sa.BigInteger), + sa.Column("created_at", sa.BigInteger, nullable=False), + sa.Column("updated_at", sa.BigInteger, nullable=False), + # ADR-004 Progressive Consent fields + sa.Column("flow_type", sa.Text, server_default="hybrid"), + sa.Column("token_audience", sa.Text, server_default="nextcloud"), + sa.Column("provisioned_at", sa.BigInteger), + sa.Column("provisioning_client_id", sa.Text), + sa.Column("scopes", sa.Text), + # Browser session profile cache + sa.Column("user_profile", sa.Text), + sa.Column("profile_cached_at", sa.BigInteger), + ) + + op.create_table( + "audit_logs", + sa.Column("id", sa.Integer, primary_key=True, autoincrement=True), + sa.Column("timestamp", sa.BigInteger, nullable=False), + sa.Column("event", sa.Text, nullable=False), + sa.Column("user_id", sa.Text, nullable=False), + sa.Column("resource_type", sa.Text), + sa.Column("resource_id", sa.Text), + sa.Column("auth_method", sa.Text), + sa.Column("hostname", sa.Text), + ) + op.create_index("idx_audit_user_timestamp", "audit_logs", ["user_id", "timestamp"]) + + op.create_table( + "oauth_clients", + sa.Column("id", sa.Integer, primary_key=True, autoincrement=False), + sa.Column("client_id", sa.Text, nullable=False, unique=True), + sa.Column("encrypted_client_secret", sa.LargeBinary, nullable=False), + sa.Column("client_id_issued_at", sa.BigInteger, nullable=False), + sa.Column("client_secret_expires_at", sa.BigInteger, nullable=False), + sa.Column("redirect_uris", sa.Text, nullable=False), + sa.Column("encrypted_registration_access_token", sa.LargeBinary), + sa.Column("registration_client_uri", sa.Text), + sa.Column("created_at", sa.BigInteger, nullable=False), + sa.Column("updated_at", sa.BigInteger, nullable=False), + ) + + op.create_table( + "oauth_sessions", + sa.Column("session_id", sa.Text, primary_key=True), + sa.Column("client_id", sa.Text), + sa.Column("client_redirect_uri", sa.Text, nullable=False), + sa.Column("state", sa.Text), + sa.Column("code_challenge", sa.Text), + sa.Column("code_challenge_method", sa.Text), + sa.Column("mcp_authorization_code", sa.Text, unique=True), + sa.Column("idp_access_token", sa.Text), + sa.Column("idp_refresh_token", sa.Text), + sa.Column("user_id", sa.Text), + sa.Column("created_at", sa.BigInteger, nullable=False), + sa.Column("expires_at", sa.BigInteger, nullable=False), + # ADR-004 Progressive Consent fields + sa.Column("flow_type", sa.Text, server_default="hybrid"), + sa.Column("requested_scopes", sa.Text), + sa.Column("granted_scopes", sa.Text), + sa.Column("is_provisioning", sa.Boolean, server_default=sa.false()), + ) + op.create_index( + "idx_oauth_sessions_mcp_code", + "oauth_sessions", + ["mcp_authorization_code"], + ) + + # Legacy schema-version table; superseded by alembic_version. Only + # created on SQLite because it exists *purely* to match the + # fingerprint of pre-Alembic SQLite databases that get stamped into + # the migration chain (see ``RefreshTokenStorage.initialize()``). + # Fresh Postgres installs have no pre-Alembic history and don't + # need it. PR #798 round-3 review (#4). + if op.get_bind().dialect.name == "sqlite": + op.create_table( + "schema_version", + sa.Column("version", sa.Integer, primary_key=True, autoincrement=False), + sa.Column("applied_at", sa.Float, nullable=False), ) - """ - ) - # Audit logs table (both OAuth and BasicAuth modes) - op.execute( - """ - CREATE TABLE IF NOT EXISTS audit_logs ( - id INTEGER PRIMARY KEY AUTOINCREMENT, - timestamp INTEGER NOT NULL, - event TEXT NOT NULL, - user_id TEXT NOT NULL, - resource_type TEXT, - resource_id TEXT, - auth_method TEXT, - hostname TEXT - ) - """ - ) - - # Index on audit logs for efficient queries - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_audit_user_timestamp - ON audit_logs(user_id, timestamp) - """ - ) - - # OAuth client credentials storage (OAuth mode only) - op.execute( - """ - CREATE TABLE IF NOT EXISTS oauth_clients ( - id INTEGER PRIMARY KEY, - client_id TEXT UNIQUE NOT NULL, - encrypted_client_secret BLOB NOT NULL, - client_id_issued_at INTEGER NOT NULL, - client_secret_expires_at INTEGER NOT NULL, - redirect_uris TEXT NOT NULL, - encrypted_registration_access_token BLOB, - registration_client_uri TEXT, - created_at INTEGER NOT NULL, - updated_at INTEGER NOT NULL - ) - """ - ) - - # OAuth flow sessions (ADR-004 Progressive Consent) - op.execute( - """ - CREATE TABLE IF NOT EXISTS oauth_sessions ( - session_id TEXT PRIMARY KEY, - client_id TEXT, - client_redirect_uri TEXT NOT NULL, - state TEXT, - code_challenge TEXT, - code_challenge_method TEXT, - mcp_authorization_code TEXT UNIQUE, - idp_access_token TEXT, - idp_refresh_token TEXT, - user_id TEXT, - created_at INTEGER NOT NULL, - expires_at INTEGER NOT NULL, - -- ADR-004 Progressive Consent fields - flow_type TEXT DEFAULT 'hybrid', - requested_scopes TEXT, - granted_scopes TEXT, - is_provisioning BOOLEAN DEFAULT FALSE - ) - """ - ) - - # Index for MCP authorization code lookups - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_oauth_sessions_mcp_code - ON oauth_sessions(mcp_authorization_code) - """ - ) - - # Legacy schema version tracking table - # NOTE: This is deprecated in favor of Alembic's alembic_version table - # Kept for backward compatibility with pre-Alembic databases - op.execute( - """ - CREATE TABLE IF NOT EXISTS schema_version ( - version INTEGER PRIMARY KEY, - applied_at REAL NOT NULL - ) - """ - ) - - # Registered webhooks tracking (both BasicAuth and OAuth modes) - op.execute( - """ - CREATE TABLE IF NOT EXISTS registered_webhooks ( - id INTEGER PRIMARY KEY AUTOINCREMENT, - webhook_id INTEGER NOT NULL UNIQUE, - preset_id TEXT NOT NULL, - created_at REAL NOT NULL - ) - """ - ) - - # Indexes for efficient webhook queries - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_webhooks_preset - ON registered_webhooks(preset_id) - """ - ) - - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_webhooks_created - ON registered_webhooks(created_at) - """ + op.create_table( + "registered_webhooks", + sa.Column("id", sa.Integer, primary_key=True, autoincrement=True), + sa.Column("webhook_id", sa.Integer, nullable=False, unique=True), + sa.Column("preset_id", sa.Text, nullable=False), + # BigInteger for consistency with every other *_at column (PR #798 + # review): subsecond precision wasn't load-bearing for webhook + # bookkeeping. ``store_webhook()`` casts to ``int(time.time())``. + sa.Column("created_at", sa.BigInteger, nullable=False), ) + op.create_index("idx_webhooks_preset", "registered_webhooks", ["preset_id"]) + op.create_index("idx_webhooks_created", "registered_webhooks", ["created_at"]) def downgrade() -> None: @@ -170,16 +145,15 @@ def downgrade() -> None: Use with extreme caution. """ - # Drop indexes first - op.execute("DROP INDEX IF EXISTS idx_webhooks_created") - op.execute("DROP INDEX IF EXISTS idx_webhooks_preset") - op.execute("DROP INDEX IF EXISTS idx_oauth_sessions_mcp_code") - op.execute("DROP INDEX IF EXISTS idx_audit_user_timestamp") - - # Drop tables - op.execute("DROP TABLE IF EXISTS registered_webhooks") - op.execute("DROP TABLE IF EXISTS schema_version") - op.execute("DROP TABLE IF EXISTS oauth_sessions") - op.execute("DROP TABLE IF EXISTS oauth_clients") - op.execute("DROP TABLE IF EXISTS audit_logs") - op.execute("DROP TABLE IF EXISTS refresh_tokens") + op.drop_index("idx_webhooks_created", table_name="registered_webhooks") + op.drop_index("idx_webhooks_preset", table_name="registered_webhooks") + op.drop_table("registered_webhooks") + # ``schema_version`` is only created on SQLite (see ``upgrade()``). + if op.get_bind().dialect.name == "sqlite": + op.drop_table("schema_version") + op.drop_index("idx_oauth_sessions_mcp_code", table_name="oauth_sessions") + op.drop_table("oauth_sessions") + op.drop_table("oauth_clients") + op.drop_index("idx_audit_user_timestamp", table_name="audit_logs") + op.drop_table("audit_logs") + op.drop_table("refresh_tokens") diff --git a/nextcloud_mcp_server/alembic/versions/20260113_1200_002_add_app_passwords.py b/nextcloud_mcp_server/alembic/versions/20260113_1200_002_add_app_passwords.py index 9e7b36c0..25aa17f4 100644 --- a/nextcloud_mcp_server/alembic/versions/20260113_1200_002_add_app_passwords.py +++ b/nextcloud_mcp_server/alembic/versions/20260113_1200_002_add_app_passwords.py @@ -10,6 +10,8 @@ Create Date: 2026-01-13 12:00:00.000000 """ +import sqlalchemy as sa + from alembic import op # revision identifiers, used by Alembic. @@ -22,29 +24,19 @@ depends_on = None def upgrade() -> None: """Add app_passwords table for multi-user BasicAuth mode.""" - # App passwords table for multi-user BasicAuth background sync - op.execute( - """ - CREATE TABLE IF NOT EXISTS app_passwords ( - user_id TEXT PRIMARY KEY, - encrypted_password BLOB NOT NULL, - created_at INTEGER NOT NULL, - updated_at INTEGER NOT NULL - ) - """ - ) - - # Index for efficient user lookups - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_app_passwords_updated - ON app_passwords(updated_at) - """ + op.create_table( + "app_passwords", + sa.Column("user_id", sa.Text, primary_key=True), + sa.Column("encrypted_password", sa.LargeBinary, nullable=False), + # BigInteger to keep unix epochs in range on Postgres (see 001). + sa.Column("created_at", sa.BigInteger, nullable=False), + sa.Column("updated_at", sa.BigInteger, nullable=False), ) + op.create_index("idx_app_passwords_updated", "app_passwords", ["updated_at"]) def downgrade() -> None: """Drop app_passwords table.""" - op.execute("DROP INDEX IF EXISTS idx_app_passwords_updated") - op.execute("DROP TABLE IF EXISTS app_passwords") + op.drop_index("idx_app_passwords_updated", table_name="app_passwords") + op.drop_table("app_passwords") diff --git a/nextcloud_mcp_server/alembic/versions/20260227_1200_003_add_scopes_and_login_flow.py b/nextcloud_mcp_server/alembic/versions/20260227_1200_003_add_scopes_and_login_flow.py index 5f14e678..1f049155 100644 --- a/nextcloud_mcp_server/alembic/versions/20260227_1200_003_add_scopes_and_login_flow.py +++ b/nextcloud_mcp_server/alembic/versions/20260227_1200_003_add_scopes_and_login_flow.py @@ -12,6 +12,8 @@ Create Date: 2026-02-27 12:00:00.000000 """ +import sqlalchemy as sa + from alembic import op # revision identifiers, used by Alembic. @@ -24,72 +26,37 @@ depends_on = None def upgrade() -> None: """Add scopes/username to app_passwords and create login_flow_sessions.""" - # Add scopes column (nullable JSON array, NULL = all scopes allowed) - op.execute( - """ - ALTER TABLE app_passwords ADD COLUMN scopes TEXT - """ - ) + # Nullable scope columns on the existing app_passwords table. + op.add_column("app_passwords", sa.Column("scopes", sa.Text)) + op.add_column("app_passwords", sa.Column("username", sa.Text)) - # Add username column (Nextcloud loginName from Login Flow v2) - op.execute( - """ - ALTER TABLE app_passwords ADD COLUMN username TEXT - """ + op.create_table( + "login_flow_sessions", + sa.Column("user_id", sa.Text, primary_key=True), + sa.Column("encrypted_poll_token", sa.LargeBinary, nullable=False), + sa.Column("poll_endpoint", sa.Text, nullable=False), + sa.Column("requested_scopes", sa.Text), + # BigInteger to keep unix epochs in range on Postgres (see 001). + sa.Column("created_at", sa.BigInteger, nullable=False), + sa.Column("expires_at", sa.BigInteger, nullable=False), ) - - # Login Flow v2 session tracking - op.execute( - """ - CREATE TABLE IF NOT EXISTS login_flow_sessions ( - user_id TEXT PRIMARY KEY, - encrypted_poll_token BLOB NOT NULL, - poll_endpoint TEXT NOT NULL, - requested_scopes TEXT, - created_at INTEGER NOT NULL, - expires_at INTEGER NOT NULL - ) - """ - ) - - # Index for efficient cleanup of expired sessions - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_login_flow_sessions_expires - ON login_flow_sessions(expires_at) - """ + op.create_index( + "idx_login_flow_sessions_expires", + "login_flow_sessions", + ["expires_at"], ) def downgrade() -> None: - """Drop login_flow_sessions and remove added columns.""" + """Drop login_flow_sessions and remove added columns. - op.execute("DROP INDEX IF EXISTS idx_login_flow_sessions_expires") - op.execute("DROP TABLE IF EXISTS login_flow_sessions") + ``batch_alter_table`` handles SQLite's pre-3.35 lack of ``DROP COLUMN`` + by recreating the table; on Postgres it issues a native ``DROP COLUMN``. + """ - # SQLite doesn't support DROP COLUMN before 3.35.0 - # Recreate app_passwords without the new columns - op.execute( - """ - CREATE TABLE app_passwords_backup ( - user_id TEXT PRIMARY KEY, - encrypted_password BLOB NOT NULL, - created_at INTEGER NOT NULL, - updated_at INTEGER NOT NULL - ) - """ - ) - op.execute( - """ - INSERT INTO app_passwords_backup (user_id, encrypted_password, created_at, updated_at) - SELECT user_id, encrypted_password, created_at, updated_at FROM app_passwords - """ - ) - op.execute("DROP TABLE app_passwords") - op.execute("ALTER TABLE app_passwords_backup RENAME TO app_passwords") - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_app_passwords_updated - ON app_passwords(updated_at) - """ - ) + op.drop_index("idx_login_flow_sessions_expires", table_name="login_flow_sessions") + op.drop_table("login_flow_sessions") + + with op.batch_alter_table("app_passwords") as batch_op: + batch_op.drop_column("username") + batch_op.drop_column("scopes") diff --git a/nextcloud_mcp_server/alembic/versions/20260502_1500_005_add_browser_sessions.py b/nextcloud_mcp_server/alembic/versions/20260502_1500_005_add_browser_sessions.py index b85f20d1..a8aaea7d 100644 --- a/nextcloud_mcp_server/alembic/versions/20260502_1500_005_add_browser_sessions.py +++ b/nextcloud_mcp_server/alembic/versions/20260502_1500_005_add_browser_sessions.py @@ -10,6 +10,8 @@ Revises: 004 Create Date: 2026-05-02 15:00:00.000000 """ +import sqlalchemy as sa + from alembic import op revision = "005" @@ -19,31 +21,19 @@ depends_on = None def upgrade() -> None: - op.execute( - """ - CREATE TABLE IF NOT EXISTS browser_sessions ( - session_id TEXT PRIMARY KEY, - user_id TEXT NOT NULL, - created_at INTEGER NOT NULL, - expires_at INTEGER NOT NULL - ) - """ - ) - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_browser_sessions_user - ON browser_sessions(user_id) - """ - ) - op.execute( - """ - CREATE INDEX IF NOT EXISTS idx_browser_sessions_expires - ON browser_sessions(expires_at) - """ + op.create_table( + "browser_sessions", + sa.Column("session_id", sa.Text, primary_key=True), + sa.Column("user_id", sa.Text, nullable=False), + # BigInteger to keep unix epochs in range on Postgres (see 001). + sa.Column("created_at", sa.BigInteger, nullable=False), + sa.Column("expires_at", sa.BigInteger, nullable=False), ) + op.create_index("idx_browser_sessions_user", "browser_sessions", ["user_id"]) + op.create_index("idx_browser_sessions_expires", "browser_sessions", ["expires_at"]) def downgrade() -> None: - op.execute("DROP INDEX IF EXISTS idx_browser_sessions_expires") - op.execute("DROP INDEX IF EXISTS idx_browser_sessions_user") - op.execute("DROP TABLE IF EXISTS browser_sessions") + op.drop_index("idx_browser_sessions_expires", table_name="browser_sessions") + op.drop_index("idx_browser_sessions_user", table_name="browser_sessions") + op.drop_table("browser_sessions") diff --git a/nextcloud_mcp_server/alembic/versions/20260502_1600_006_add_nonce_to_oauth_sessions.py b/nextcloud_mcp_server/alembic/versions/20260502_1600_006_add_nonce_to_oauth_sessions.py index 8489e38f..8b980e27 100644 --- a/nextcloud_mcp_server/alembic/versions/20260502_1600_006_add_nonce_to_oauth_sessions.py +++ b/nextcloud_mcp_server/alembic/versions/20260502_1600_006_add_nonce_to_oauth_sessions.py @@ -12,6 +12,8 @@ Revises: 005 Create Date: 2026-05-02 16:00:00.000000 """ +import sqlalchemy as sa + from alembic import op revision = "006" @@ -21,9 +23,14 @@ depends_on = None def upgrade() -> None: - op.execute("ALTER TABLE oauth_sessions ADD COLUMN nonce TEXT") + # ``batch_alter_table`` emits a native ``ALTER TABLE ... ADD COLUMN`` + # on Postgres and works around SQLite's pre-3.35 limitations by + # recreating the table when needed. Matches the portable-DDL style of + # the rewritten migrations 001-005 (PR #798 review nit). + with op.batch_alter_table("oauth_sessions") as batch_op: + batch_op.add_column(sa.Column("nonce", sa.Text)) def downgrade() -> None: - # SQLite < 3.35 cannot DROP COLUMN; leave the column on downgrade. - pass + with op.batch_alter_table("oauth_sessions") as batch_op: + batch_op.drop_column("nonce") diff --git a/nextcloud_mcp_server/app.py b/nextcloud_mcp_server/app.py index 247b3b5b..f5d0d8c2 100644 --- a/nextcloud_mcp_server/app.py +++ b/nextcloud_mcp_server/app.py @@ -599,6 +599,12 @@ async def app_lifespan_basic(server: FastMCP) -> AsyncIterator[AppContext]: logger.info("Shutting down BasicAuth session") if client is not None: await client.close() + # Dispose the storage engine so pooled asyncpg connections drain + # cleanly on SIGTERM (ADR-026, PR #798 round-4). + try: + await storage.close() + except Exception as e: + logger.warning("Error disposing storage: %s", e) async def setup_oauth_config(): @@ -1229,7 +1235,15 @@ def get_app(transport: str = "streamable-http", enabled_apps: list[str] | None = ) finally: logger.info("Shutting down MCP server") - # RefreshTokenStorage uses context managers, no close() needed + # Dispose the RefreshTokenStorage engine so pooled + # asyncpg connections drain cleanly on SIGTERM instead + # of leaking server-side slots until the Postgres + # idle-timeout fires (ADR-026, PR #798 round-4). + if refresh_token_storage is not None: + try: + await refresh_token_storage.close() + except Exception as e: + logger.warning("Error disposing refresh-token storage: %s", e) # OAuth client cleanup (if it has a close method) if oauth_client and hasattr(oauth_client, "close"): try: diff --git a/nextcloud_mcp_server/auth/storage.py b/nextcloud_mcp_server/auth/storage.py index 4090aa25..6606fc98 100644 --- a/nextcloud_mcp_server/auth/storage.py +++ b/nextcloud_mcp_server/auth/storage.py @@ -1,8 +1,14 @@ """ Persistent Storage for MCP Server State -This module provides SQLite-based storage for multiple concerns across both -BasicAuth and OAuth authentication modes: +This module provides SQL-backed storage for multiple concerns across both +BasicAuth and OAuth authentication modes. The default backend is SQLite +(file-based or per-process tempfile); set ``DATABASE_URL`` to a +``postgresql+asyncpg://...`` URL for HA k8s deployments where pods need +to be stateless. See :doc:`ADR-026 ` +for the design. + +Concerns covered: 1. **Refresh Tokens** (OAuth mode only, for background jobs) - Securely stores encrypted refresh tokens for offline access @@ -25,28 +31,276 @@ Token storage requires TOKEN_ENCRYPTION_KEY, but webhook tracking does not. Sensitive data (tokens, secrets) is encrypted at rest using Fernet symmetric encryption. """ +import hashlib +import importlib.util import json import logging import os import socket import sqlite3 import time +from contextlib import asynccontextmanager from pathlib import Path from typing import Any -import aiosqlite import anyio import httpx +import sqlalchemy as sa from anyio import to_thread from cryptography.fernet import Fernet +from sqlalchemy.ext.asyncio import AsyncConnection, AsyncEngine, create_async_engine +from sqlalchemy.pool import NullPool -from nextcloud_mcp_server.config import get_token_db_path, is_ephemeral_token_db +from nextcloud_mcp_server.config import ( + get_database_ssl, + get_database_url, + get_settings, + is_ephemeral_token_db, + is_sqlite_url, + mask_db_password, +) from nextcloud_mcp_server.migrations import stamp_database, upgrade_database from nextcloud_mcp_server.observability.metrics import record_db_operation logger = logging.getLogger(__name__) +# Stable 64-bit signed integer used for the Postgres advisory-lock that +# serializes concurrent Alembic migrations across pods (ADR-026 → +# "Concurrent migrations"). Derived from a SHA-256 of a project-scoped +# string so we can't collide with other apps sharing the same DB. +_MIGRATION_LOCK_ID = int.from_bytes( + hashlib.sha256(b"nextcloud-mcp-server:migrations").digest()[:8], + "big", + signed=True, +) + + +def _qmark_to_named(sql: str) -> tuple[str, list[str]]: + """Rewrite ``?`` positional placeholders to ``:p0, :p1, ...`` named binds. + + SQLAlchemy's :func:`text` only supports named bind parameters, so the + aiosqlite-style call sites (which use ``?``) are translated as they + cross the shim. The rewriter preserves ``?`` characters inside SQL + string literals; comments are not currently respected but the storage + layer doesn't put ``?`` inside comments. + """ + out: list[str] = [] + names: list[str] = [] + i = 0 + in_str = False + quote = "" + n = 0 + while i < len(sql): + ch = sql[i] + if in_str: + out.append(ch) + if ch == quote: + # SQL string escapes ('' or "") — stay in string mode. + if i + 1 < len(sql) and sql[i + 1] == quote: + out.append(quote) + i += 2 + continue + in_str = False + i += 1 + continue + if ch in ("'", '"'): + in_str = True + quote = ch + out.append(ch) + i += 1 + continue + if ch == "?": + name = f"p{n}" + out.append(f":{name}") + names.append(name) + n += 1 + i += 1 + continue + out.append(ch) + i += 1 + return "".join(out), names + + +class _Row: + """Hybrid tuple/dict row mirroring ``aiosqlite.Row`` semantics. + + The legacy SQLite-direct call sites use a mix of access patterns: + positional unpacking (``a, b, c = row``), indexed access (``row[0]``), + and dict-like access (``row["col"]``, ``dict(row)``) when + ``db.row_factory = aiosqlite.Row`` is set. To avoid touching every call + site, every row returned by :class:`_Cursor` is wrapped in this hybrid + object so all three patterns keep working. + """ + + __slots__ = ("_values", "_mapping") + + def __init__(self, values: tuple, mapping: dict) -> None: + self._values = values + self._mapping = mapping + + def __getitem__(self, key): + if isinstance(key, (int, slice)): + return self._values[key] + return self._mapping[key] + + def __iter__(self): + return iter(self._values) + + def __len__(self) -> int: + return len(self._values) + + def keys(self): + return self._mapping.keys() + + def values(self): + return self._mapping.values() + + def items(self): + return self._mapping.items() + + +def _wrap_row(row) -> _Row | None: + if row is None: + return None + # ``row._mapping`` is the documented public RowMapping accessor in + # SQLAlchemy 2.x (the leading underscore is historical); it returns + # a column-name → value mapping that survives the row being + # tuple-iterated. See SQLAlchemy 2.x ``Row.mapping`` docs. + return _Row(tuple(row), dict(row._mapping)) + + +def _describe_ssl_arg(ssl_arg: object) -> str: + """Render the ``ssl`` value for the startup log line. + + Split out of the engine factory to avoid a nested-ternary + SonarQube finding (``S3358``) and to make the cases readable. + """ + if ssl_arg is False: + return "disabled" + if isinstance(ssl_arg, bool): + return "verify-full (system CAs)" + return "custom CA bundle" + + +def _wrap_rows(rows) -> list[_Row]: + """Wrap a list of SQLAlchemy rows; iterator never yields ``None``.""" + return [_Row(tuple(r), dict(r._mapping)) for r in rows] + + +class _Cursor: + """aiosqlite-compatible cursor view over a SQLAlchemy CursorResult. + + Existing storage methods iterate cursors via ``async with db.execute(...) + as cursor: row = await cursor.fetchone()``. SQLAlchemy returns a + synchronous :class:`Result` from an async ``execute``; this shim adds the + async context-manager / async-fetch surface so call sites are unchanged. + + ``rowcount`` is captured eagerly at construction time. ``lastrowid`` is + intentionally NOT exposed: accessing ``CursorResult.lastrowid`` on the + asyncpg dialect consumes the result buffer, which would silently turn + every subsequent ``fetchall()`` into an empty list (a real bug hit + during the Postgres port). + """ + + __slots__ = ("_result", "rowcount") + + def __init__(self, result: sa.CursorResult) -> None: + self._result = result + # ``rowcount`` is -1 for SELECTs in SQLAlchemy; existing code only + # reads it after writes (DELETE/UPDATE) where it is accurate. + self.rowcount = result.rowcount + + async def fetchone(self) -> _Row | None: + return _wrap_row(self._result.fetchone()) + + async def fetchall(self) -> list[_Row]: + return _wrap_rows(self._result.fetchall()) + + # Python's async-context-manager protocol *requires* ``__aenter__`` and + # ``__aexit__`` to be coroutines even when the body has nothing to + # await; dropping ``async`` would break ``async with _Cursor(...)``. + # The bare ``# NOSONAR`` markers below silence ``python:S7503`` + # ("async function with no await") for that protocol-mandated reason. + async def __aenter__(self) -> "_Cursor": # NOSONAR + return self + + async def __aexit__(self, *exc: object) -> None: # NOSONAR + # SQLAlchemy Result closes when the connection closes; no-op here. + return None + + +class _ExecuteCtx: + """Hybrid awaitable + async context manager for ``db.execute(...)``. + + Aiosqlite call sites use both forms interchangeably:: + + cursor = await db.execute(sql, params) + async with db.execute(sql, params) as cursor: ... + + so the return value must be awaitable (resolves to a cursor) AND a + one-shot async context manager (executes on ``__aenter__`` and returns + the cursor). This wrapper provides both surfaces without executing the + SQL twice — the cursor is cached after the first resolution. + """ + + __slots__ = ("_conn", "_sql", "_params", "_cursor") + + def __init__(self, conn: AsyncConnection, sql: str, params: tuple | list) -> None: + self._conn = conn + self._sql = sql + self._params = params + self._cursor: _Cursor | None = None + + async def _resolve(self) -> _Cursor: + if self._cursor is not None: + return self._cursor + text_sql, names = _qmark_to_named(self._sql) + if len(names) != len(self._params): + raise ValueError( + f"Placeholder count mismatch: SQL has {len(names)} '?' " + f"but got {len(self._params)} params" + ) + bind = dict(zip(names, self._params, strict=True)) + result = await self._conn.execute(sa.text(text_sql), bind) + self._cursor = _Cursor(result) + return self._cursor + + def __await__(self): + return self._resolve().__await__() + + async def __aenter__(self) -> _Cursor: + return await self._resolve() + + async def __aexit__(self, *exc: object) -> None: + return None + + +class _DBConn: + """aiosqlite-compatible wrapper around a SQLAlchemy AsyncConnection. + + Provides ``execute`` (with ``?`` placeholders, returning a hybrid + awaitable/context-manager :class:`_ExecuteCtx`) and ``commit`` so the + existing storage method bodies need no churn beyond swapping the + connection context-manager. Wraps results in :class:`_Cursor` for the + fetchone/fetchall/rowcount surface the call sites already use. + + ``row_factory`` is accepted as a setter for source compatibility with + aiosqlite call sites but is ignored: every row is already wrapped in + :class:`_Row` so dict-style access works unconditionally. + """ + + def __init__(self, conn: AsyncConnection) -> None: + self._conn = conn + self.row_factory = None # set by aiosqlite-shaped call sites; ignored + + def execute(self, sql: str, params: tuple | list = ()) -> _ExecuteCtx: + return _ExecuteCtx(self._conn, sql, params) + + async def commit(self) -> None: + await self._conn.commit() + + class RefreshTokenStorage: """Persistent storage for MCP server state (tokens, webhooks, and future features). @@ -65,17 +319,48 @@ class RefreshTokenStorage: Token-related operations require TOKEN_ENCRYPTION_KEY, but webhook operations do not. """ - def __init__(self, db_path: str, encryption_key: bytes | None = None): + def __init__( + self, + database_url: str | None = None, + encryption_key: bytes | None = None, + *, + db_path: str | None = None, + ): """ Initialize persistent storage. Args: - db_path: Path to SQLite database file + database_url: SQLAlchemy URL (``sqlite+aiosqlite:///...`` or + ``postgresql+asyncpg://...``). When omitted, falls back to + :func:`get_database_url` (honors ``DATABASE_URL`` env, then + ``TOKEN_STORAGE_DB``). encryption_key: Optional Fernet encryption key (32 bytes, base64-encoded). - Required for token storage operations, not required for webhook tracking. + Required for token storage operations, not required for webhook tracking. + db_path: Deprecated SQLite-only constructor argument retained for + tests that pass a tempfile path. Internally converted to + ``sqlite+aiosqlite:///{db_path}``. """ - self.db_path = db_path + if database_url is None and db_path is not None: + database_url = f"sqlite+aiosqlite:///{db_path}" + if database_url is None: + database_url = get_database_url() + self.database_url = database_url + # Legacy attribute retained for sqlite-only code paths (file perms, + # ephemeral tempfile detection, log messages). Empty string for + # non-sqlite URLs so accidental file ops fail loudly. We delegate + # the parsing to SQLAlchemy's ``make_url`` rather than splitting + # on ``///`` — same result for both 3-slash (relative) and + # 4-slash (absolute) SQLite URLs, plus correct handling of the + # in-memory ``:memory:`` form (``.database`` is ``None`` there). + if is_sqlite_url(database_url): + from sqlalchemy.engine.url import make_url # noqa: PLC0415 + + self.db_path = make_url(database_url).database or "" + else: + self.db_path = "" self.cipher = Fernet(encryption_key) if encryption_key else None + self.engine: AsyncEngine | None = None + self._dialect: str = "unknown" self._initialized = False @classmethod @@ -84,10 +369,14 @@ class RefreshTokenStorage: Create storage instance from environment variables. Environment variables: - TOKEN_STORAGE_DB: Path to database file. If unset, a per-process - tempfile is allocated and deleted at interpreter exit — - tokens are ephemeral and wiped on restart. Set this to a - filesystem path to persist tokens across restarts. + DATABASE_URL: SQLAlchemy URL for any supported backend. Wins + over ``TOKEN_STORAGE_DB`` when set. Use + ``postgresql+asyncpg://user:pw@host/db`` for HA k8s + deployments. See ADR-026. + TOKEN_STORAGE_DB: Legacy SQLite-only path. If unset and + ``DATABASE_URL`` is also unset, a per-process tempfile is + allocated and deleted at interpreter exit — tokens are + ephemeral and wiped on restart. TOKEN_ENCRYPTION_KEY: Optional base64-encoded Fernet key (required for token storage) Returns: @@ -97,12 +386,18 @@ class RefreshTokenStorage: If TOKEN_ENCRYPTION_KEY is not set, token storage operations will fail, but webhook tracking will still work. """ - db_path = get_token_db_path() - if is_ephemeral_token_db(db_path): + database_url = get_database_url() + if is_sqlite_url(database_url): + sqlite_path = database_url.split("///", 1)[1] + if is_ephemeral_token_db(sqlite_path): + logger.info( + "Using ephemeral token storage at %s " + "(set DATABASE_URL or TOKEN_STORAGE_DB to persist tokens across restarts)", + sqlite_path, + ) + else: logger.info( - "Using ephemeral token storage at %s " - "(set TOKEN_STORAGE_DB to persist tokens across restarts)", - db_path, + "Using centralized token storage at %s", mask_db_password(database_url) ) encryption_key_b64 = os.getenv("TOKEN_ENCRYPTION_KEY") @@ -130,7 +425,7 @@ class RefreshTokenStorage: "but webhook tracking will still work" ) - return cls(db_path=db_path, encryption_key=encryption_key) + return cls(database_url=database_url, encryption_key=encryption_key) async def initialize(self) -> None: """ @@ -151,7 +446,9 @@ class RefreshTokenStorage: if self._initialized: return - if sqlite3.sqlite_version_info < (3, 35): + is_sqlite = is_sqlite_url(self.database_url) + + if is_sqlite and sqlite3.sqlite_version_info < (3, 35): raise RuntimeError( "SQLite >= 3.35 is required (DELETE ... RETURNING is used " "by delete_browser_session); detected " @@ -159,63 +456,205 @@ class RefreshTokenStorage: "image with a newer bundled libsqlite3." ) - # Ensure directory exists - db_dir = Path(self.db_path).parent - db_dir.mkdir(parents=True, exist_ok=True) + if is_sqlite: + # File-permission hardening + parent dir creation is sqlite-only; + # centralized backends manage their own filesystem. + db_dir = Path(self.db_path).parent + db_dir.mkdir(parents=True, exist_ok=True) + if Path(self.db_path).exists(): + os.chmod(self.db_path, 0o600) - # Set restrictive permissions on database file if it exists - if Path(self.db_path).exists(): - os.chmod(self.db_path, 0o600) - - # Check database state and run appropriate migration strategy - async with aiosqlite.connect(self.db_path) as db: - # Check if database is managed by Alembic - cursor = await db.execute( - "SELECT name FROM sqlite_master WHERE type='table' AND name='alembic_version'" + # Create the shared async engine for the chosen backend. SQLite uses + # NullPool (per-call connections, matches the prior aiosqlite-direct + # behavior); Postgres uses a small bounded pool — see + # ``_build_postgres_engine`` for sizing rationale. + if is_sqlite: + self.engine = create_async_engine( + self.database_url, + poolclass=NullPool, + connect_args={"check_same_thread": False}, + future=True, ) - has_alembic = await cursor.fetchone() is not None + else: + self.engine = self._build_postgres_engine() + self._dialect = self.engine.dialect.name + + # Check database state with the SQLAlchemy inspector so the legacy + # ``sqlite_master`` lookup works against either backend. + def _inspect(sync_conn: sa.Connection) -> tuple[bool, bool]: + insp = sa.inspect(sync_conn) + tables = set(insp.get_table_names()) + return ("alembic_version" in tables), ("refresh_tokens" in tables) + + # Hold the advisory lock across BOTH the inspect and the migration + # call so two pods racing the rolling-update can't both see "no + # alembic_version" and both try to run from scratch. The lock is a + # no-op on SQLite (file-level locking serializes writes natively). + async with self._migration_lock(): + async with self.engine.connect() as conn: + has_alembic, has_schema = await conn.run_sync(_inspect) if not has_alembic: - # Check if this is a pre-Alembic database with existing schema - cursor = await db.execute( - "SELECT name FROM sqlite_master WHERE type='table' AND name='refresh_tokens'" - ) - has_schema = await cursor.fetchone() is not None - if has_schema: logger.info( "Detected pre-Alembic database at %s, stamping with initial revision", - self.db_path, + mask_db_password(self.database_url), + ) + await to_thread.run_sync(stamp_database, self.database_url, "001") + logger.info( + "Pre-Alembic database stamped successfully. " + "Future schema changes will use migrations." ) else: logger.info( - "Initializing new database at %s with migrations", self.db_path + "Initializing new database at %s with migrations", + mask_db_password(self.database_url), ) - - # Run migrations in a worker thread using anyio.to_thread - # This allows Alembic to run its own async operations in a separate context - if not has_alembic: - if has_schema: - # Stamp existing database without running migrations - await to_thread.run_sync(stamp_database, self.db_path, "001") - logger.info( - "Pre-Alembic database stamped successfully. " - "Future schema changes will use migrations." - ) + await to_thread.run_sync( + upgrade_database, self.database_url, "head" + ) + logger.info("Database initialized with migrations") else: - # New database - run migrations - await to_thread.run_sync(upgrade_database, self.db_path, "head") - logger.info("Database initialized with migrations") - else: - # Alembic-managed database - upgrade to latest - await to_thread.run_sync(upgrade_database, self.db_path, "head") - logger.info("Database upgraded to latest version") + await to_thread.run_sync(upgrade_database, self.database_url, "head") + logger.info("Database upgraded to latest version") - # Set restrictive permissions after initialization - os.chmod(self.db_path, 0o600) + if is_sqlite: + os.chmod(self.db_path, 0o600) self._initialized = True - logger.info("Initialized refresh token storage at %s", self.db_path) + logger.info( + "Initialized refresh token storage at %s", + mask_db_password(self.database_url), + ) + + def _build_postgres_engine(self) -> AsyncEngine: + """Construct the AsyncEngine for a Postgres ``DATABASE_URL``. + + Split out from :meth:`initialize` so cognitive complexity stays + under the SonarQube ``S3776`` threshold and so a future + engine-arg unit test has a single seam to mock. + + Defaults to ``pool_size=2, max_overflow=5`` (max 7 connections + per pod) — see ADR-026 § "Concurrency model and pool sizing" + for the rationale. asyncpg connections are single-flight, so + the pool only needs to cover the typical multi-user MCP burst, + not every potential in-flight tool call. + """ + # asyncpg ships as an optional PyPI extra (`[postgres]`) so the + # default `pip install nextcloud-mcp-server` audience doesn't + # pull in the C extension. The Docker image bundles it. Surface + # a clear actionable error when the driver is missing rather + # than the generic ``ModuleNotFoundError`` SQLAlchemy emits. + if "+asyncpg" in self.database_url.lower() and ( + importlib.util.find_spec("asyncpg") is None + ): + raise RuntimeError( + "DATABASE_URL points at Postgres via asyncpg but the " + "'asyncpg' driver is not installed. Install with " + "`pip install nextcloud-mcp-server[postgres]` or use " + "the Docker image, which bundles it. See ADR-026." + ) + + # Conditionally pass TLS config through to asyncpg. When + # ``get_database_ssl()`` returns None we omit ``ssl`` entirely + # so asyncpg's default (``prefer``) applies — keeps + # cluster-local Postgres without TLS working out of the box. + connect_args: dict[str, object] = {} + ssl_arg = get_database_ssl() + if ssl_arg is not None: + connect_args["ssl"] = ssl_arg + logger.info("Postgres backend TLS: %s", _describe_ssl_arg(ssl_arg)) + + settings = get_settings() + engine = create_async_engine( + self.database_url, + pool_size=settings.database_pool_size, + max_overflow=settings.database_max_overflow, + pool_pre_ping=True, + connect_args=connect_args, + future=True, + ) + # Log the configured sizing so operators can spot + # over-allocation at startup without grepping config. + logger.info( + "Postgres engine ready: pool_size=%d max_overflow=%d " + "(per-pod max %d connections)", + settings.database_pool_size, + settings.database_max_overflow, + settings.database_pool_size + settings.database_max_overflow, + ) + return engine + + async def close(self) -> None: + """Dispose the underlying AsyncEngine on shutdown. + + Without an explicit dispose, asyncpg's pooled connections leak + server-side slots until the Postgres + ``idle_in_transaction_session_timeout`` reaps them — with the + small pool defaults and frequent k8s rolling restarts this can + starve ``max_connections``. Idempotent: safe to call from any + number of shutdown hooks. + """ + if self.engine is None: + return + await self.engine.dispose() + self.engine = None + self._initialized = False + logger.info("Disposed token storage engine") + + @asynccontextmanager + async def _migration_lock(self): + """Serialize concurrent Alembic migrations across pods (ADR-026). + + Without this, two pods rolling-updating at the same time can race + Alembic's version-table UPDATE and both try to apply migrations + from scratch — the second one crashes with "relation already + exists". On Postgres we acquire a session-level + :func:`pg_advisory_lock` so the second pod blocks until the + first finishes. SQLite serializes writes via its own file lock + and needs no extra coordination, so this is a no-op there. + + The lock is held on a separate connection from the engine pool + so it survives the worker-thread ``to_thread.run_sync`` call + that actually runs Alembic. + """ + assert self.engine is not None, "engine must be built before migration lock" + if is_sqlite_url(self.database_url): + yield + return + + async with self.engine.connect() as conn: + await conn.execute( + sa.text("SELECT pg_advisory_lock(:lock_id)"), + {"lock_id": _MIGRATION_LOCK_ID}, + ) + logger.debug( + "Acquired Postgres advisory migration lock %s", _MIGRATION_LOCK_ID + ) + try: + yield + finally: + await conn.execute( + sa.text("SELECT pg_advisory_unlock(:lock_id)"), + {"lock_id": _MIGRATION_LOCK_ID}, + ) + logger.debug( + "Released Postgres advisory migration lock %s", + _MIGRATION_LOCK_ID, + ) + + @asynccontextmanager + async def _db(self): + """Open a backend-agnostic connection. + + Yields a :class:`_DBConn` that mimics aiosqlite's API (``execute`` with + ``?`` placeholders, ``commit``, cursor with ``fetchone`` / + ``fetchall`` / ``rowcount``) so the existing storage method bodies + work against either SQLite or Postgres without per-call rewrites. + """ + assert self.engine is not None, "RefreshTokenStorage.initialize() not called" + async with self.engine.connect() as conn: + yield _DBConn(conn) async def store_refresh_token( self, @@ -260,20 +699,30 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: + # ON CONFLICT DO UPDATE preserves ``created_at`` (it's not + # listed in the update clause) so the original + # COALESCE(...)-based INSERT OR REPLACE semantics are kept. await db.execute( """ - INSERT OR REPLACE INTO refresh_tokens + INSERT INTO refresh_tokens (user_id, encrypted_token, expires_at, created_at, updated_at, flow_type, token_audience, provisioned_at, provisioning_client_id, scopes) - VALUES (?, ?, ?, COALESCE((SELECT created_at FROM refresh_tokens WHERE user_id = ?), ?), ?, - ?, ?, ?, ?, ?) + VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) + ON CONFLICT (user_id) DO UPDATE SET + encrypted_token = EXCLUDED.encrypted_token, + expires_at = EXCLUDED.expires_at, + updated_at = EXCLUDED.updated_at, + flow_type = EXCLUDED.flow_type, + token_audience = EXCLUDED.token_audience, + provisioned_at = EXCLUDED.provisioned_at, + provisioning_client_id = EXCLUDED.provisioning_client_id, + scopes = EXCLUDED.scopes """, ( user_id, encrypted_token, expires_at, - user_id, now, now, flow_type, @@ -285,7 +734,7 @@ class RefreshTokenStorage: ) await db.commit() duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "success") + record_db_operation(self._dialect, "insert", duration, "success") logger.info( f"Stored refresh token for user {user_id}" @@ -293,7 +742,7 @@ class RefreshTokenStorage: ) except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "error") + record_db_operation(self._dialect, "insert", duration, "error") raise # Audit log @@ -322,7 +771,7 @@ class RefreshTokenStorage: profile_json = json.dumps(profile_data) now = int(time.time()) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ UPDATE refresh_tokens @@ -351,7 +800,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( """ SELECT user_profile, profile_cached_at @@ -407,7 +856,7 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( """ SELECT encrypted_token, expires_at, flow_type, token_audience, @@ -421,7 +870,7 @@ class RefreshTokenStorage: if not row: logger.debug("No refresh token found for user %s", user_id) duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return None ( @@ -443,7 +892,7 @@ class RefreshTokenStorage: ) await self.delete_refresh_token(user_id) duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return None decrypted_token = self.cipher.decrypt(encrypted_token).decode() @@ -456,7 +905,7 @@ class RefreshTokenStorage: ) duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return { "refresh_token": decrypted_token, @@ -470,7 +919,7 @@ class RefreshTokenStorage: } except Exception as e: duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "error") + record_db_operation(self._dialect, "select", duration, "error") logger.error("Failed to decrypt refresh token for user %s: %s", user_id, e) return None @@ -502,7 +951,7 @@ class RefreshTokenStorage: "TOKEN_ENCRYPTION_KEY is not set — token storage operations unavailable" ) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( """ SELECT user_id, encrypted_token, expires_at, flow_type, token_audience, @@ -582,7 +1031,7 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM refresh_tokens WHERE user_id = ?", (user_id,), @@ -591,7 +1040,7 @@ class RefreshTokenStorage: deleted = cursor.rowcount > 0 duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "success") + record_db_operation(self._dialect, "delete", duration, "success") if deleted: logger.info("Deleted refresh token for user %s", user_id) @@ -606,7 +1055,7 @@ class RefreshTokenStorage: return deleted except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "error") + record_db_operation(self._dialect, "delete", duration, "error") raise async def get_all_user_ids(self) -> list[str]: @@ -619,7 +1068,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( "SELECT user_id FROM refresh_tokens ORDER BY updated_at DESC" ) as cursor: @@ -641,7 +1090,7 @@ class RefreshTokenStorage: now = int(time.time()) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM refresh_tokens WHERE expires_at IS NOT NULL AND expires_at < ?", (now,), @@ -700,18 +1149,25 @@ class RefreshTokenStorage: redirect_uris_json = json.dumps(redirect_uris) now = int(time.time()) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: + # Singleton row pinned at id=1; ON CONFLICT preserves the + # original ``created_at`` because it's omitted from the update. await db.execute( """ - INSERT OR REPLACE INTO oauth_clients + INSERT INTO oauth_clients (id, client_id, encrypted_client_secret, client_id_issued_at, client_secret_expires_at, redirect_uris, encrypted_registration_access_token, registration_client_uri, created_at, updated_at) - VALUES ( - 1, ?, ?, ?, ?, ?, ?, ?, - COALESCE((SELECT created_at FROM oauth_clients WHERE id = 1), ?), - ? - ) + VALUES (1, ?, ?, ?, ?, ?, ?, ?, ?, ?) + ON CONFLICT (id) DO UPDATE SET + client_id = EXCLUDED.client_id, + encrypted_client_secret = EXCLUDED.encrypted_client_secret, + client_id_issued_at = EXCLUDED.client_id_issued_at, + client_secret_expires_at = EXCLUDED.client_secret_expires_at, + redirect_uris = EXCLUDED.redirect_uris, + encrypted_registration_access_token = EXCLUDED.encrypted_registration_access_token, + registration_client_uri = EXCLUDED.registration_client_uri, + updated_at = EXCLUDED.updated_at """, ( client_id, @@ -768,7 +1224,7 @@ class RefreshTokenStorage: "TOKEN_ENCRYPTION_KEY is not set — token storage operations unavailable" ) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( """ SELECT client_id, encrypted_client_secret, client_id_issued_at, @@ -841,7 +1297,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute("DELETE FROM oauth_clients WHERE id = 1") await db.commit() deleted = cursor.rowcount > 0 @@ -868,7 +1324,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( "SELECT client_secret_expires_at FROM oauth_clients WHERE id = 1" ) as cursor: @@ -902,7 +1358,7 @@ class RefreshTokenStorage: hostname = socket.gethostname() timestamp = int(time.time()) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ INSERT INTO audit_logs @@ -941,7 +1397,12 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - query = "SELECT * FROM audit_logs WHERE 1=1" + # Explicit column list (not ``SELECT *``) so future audit_logs + # schema additions don't silently leak into the dict return. + query = ( + "SELECT id, timestamp, event, user_id, resource_type, " + "resource_id, auth_method, hostname FROM audit_logs WHERE 1=1" + ) params = [] if user_id: @@ -955,9 +1416,12 @@ class RefreshTokenStorage: query += " ORDER BY timestamp DESC LIMIT ?" params.append(limit) - async with aiosqlite.connect(self.db_path) as db: - db.row_factory = aiosqlite.Row - async with db.execute(query, params) as cursor: + async with self._db() as db: + # ``query`` is built via string concatenation, but the fragments + # come only from this function's branches above (no + # user-controlled SQL); user input flows through ``params``. + # Bare ``# NOSONAR`` silences taint analysers; defensive. + async with db.execute(query, params) as cursor: # NOSONAR rows = await cursor.fetchall() return [dict(row) for row in rows] @@ -1001,7 +1465,7 @@ class RefreshTokenStorage: now = int(time.time()) expires_at = now + ttl_seconds - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ INSERT INTO oauth_sessions @@ -1042,8 +1506,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: - db.row_factory = aiosqlite.Row + async with self._db() as db: async with db.execute( "SELECT * FROM oauth_sessions WHERE session_id = ?", (session_id,) ) as cursor: @@ -1074,8 +1537,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: - db.row_factory = aiosqlite.Row + async with self._db() as db: async with db.execute( "SELECT * FROM oauth_sessions WHERE mcp_authorization_code = ?", (mcp_authorization_code,), @@ -1134,13 +1596,19 @@ class RefreshTokenStorage: params.append(session_id) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: + # ``update_fields`` only ever contains hardcoded ``"col = ?"`` + # literals from this function's branches above — there is no + # user-controlled input in the SQL string itself, only in the + # ``params`` bound below. Bare ``# NOSONAR`` silences taint + # analysers that flag f-string SQL construction (e.g. + # ``python:S2077``); no such rule fires today, defensive. cursor = await db.execute( f""" UPDATE oauth_sessions SET {", ".join(update_fields)} WHERE session_id = ? - """, + """, # NOSONAR params, ) await db.commit() @@ -1161,7 +1629,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM oauth_sessions WHERE session_id = ?", (session_id,) ) @@ -1185,7 +1653,7 @@ class RefreshTokenStorage: now = int(time.time()) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM oauth_sessions WHERE expires_at < ?", (now,) ) @@ -1220,12 +1688,16 @@ class RefreshTokenStorage: now = int(time.time()) expires_at = now + ttl_seconds - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ - INSERT OR REPLACE INTO browser_sessions + INSERT INTO browser_sessions (session_id, user_id, created_at, expires_at) VALUES (?, ?, ?, ?) + ON CONFLICT (session_id) DO UPDATE SET + user_id = EXCLUDED.user_id, + created_at = EXCLUDED.created_at, + expires_at = EXCLUDED.expires_at """, (session_id, user_id, now, expires_at), ) @@ -1257,8 +1729,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: - db.row_factory = aiosqlite.Row + async with self._db() as db: async with db.execute( "SELECT user_id, expires_at FROM browser_sessions WHERE session_id = ?", (session_id,), @@ -1285,7 +1756,7 @@ class RefreshTokenStorage: # concurrent delete that empties the row between SELECT and DELETE # (PR #758 round-3 review). user_id: str | None = None - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( "DELETE FROM browser_sessions WHERE session_id = ? RETURNING user_id", (session_id,), @@ -1319,7 +1790,7 @@ class RefreshTokenStorage: now = int(time.time()) - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM browser_sessions WHERE expires_at < ?", (now,) ) @@ -1346,10 +1817,16 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( - "INSERT OR REPLACE INTO registered_webhooks (webhook_id, preset_id, created_at) VALUES (?, ?, ?)", - (webhook_id, preset_id, time.time()), + """ + INSERT INTO registered_webhooks (webhook_id, preset_id, created_at) + VALUES (?, ?, ?) + ON CONFLICT (webhook_id) DO UPDATE SET + preset_id = EXCLUDED.preset_id, + created_at = EXCLUDED.created_at + """, + (webhook_id, preset_id, int(time.time())), ) await db.commit() @@ -1368,7 +1845,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "SELECT webhook_id FROM registered_webhooks WHERE preset_id = ?", (preset_id,), @@ -1390,7 +1867,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM registered_webhooks WHERE webhook_id = ?", (webhook_id,) ) @@ -1412,7 +1889,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "SELECT webhook_id, preset_id, created_at FROM registered_webhooks ORDER BY created_at DESC" ) @@ -1436,7 +1913,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM registered_webhooks WHERE preset_id = ?", (preset_id,) ) @@ -1478,29 +1955,27 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ - INSERT OR REPLACE INTO app_passwords + INSERT INTO app_passwords (user_id, encrypted_password, created_at, updated_at) - VALUES ( - ?, - ?, - COALESCE((SELECT created_at FROM app_passwords WHERE user_id = ?), ?), - ? - ) + VALUES (?, ?, ?, ?) + ON CONFLICT (user_id) DO UPDATE SET + encrypted_password = EXCLUDED.encrypted_password, + updated_at = EXCLUDED.updated_at """, - (user_id, encrypted_password, user_id, now, now), + (user_id, encrypted_password, now, now), ) await db.commit() duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "success") + record_db_operation(self._dialect, "insert", duration, "success") logger.info("Stored app password for user %s", user_id) except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "error") + record_db_operation(self._dialect, "insert", duration, "error") raise # Audit log @@ -1531,7 +2006,7 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( "SELECT encrypted_password FROM app_passwords WHERE user_id = ?", (user_id,), @@ -1541,21 +2016,21 @@ class RefreshTokenStorage: if not row: logger.debug("No app password found for user %s", user_id) duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return None encrypted_password = row[0] decrypted_password = self.cipher.decrypt(encrypted_password).decode() duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") logger.debug("Retrieved app password for user %s", user_id) return decrypted_password except Exception as e: duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "error") + record_db_operation(self._dialect, "select", duration, "error") logger.error("Failed to decrypt app password for user %s: %s", user_id, e) return None @@ -1574,7 +2049,7 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM app_passwords WHERE user_id = ?", (user_id,), @@ -1583,7 +2058,7 @@ class RefreshTokenStorage: deleted = cursor.rowcount > 0 duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "success") + record_db_operation(self._dialect, "delete", duration, "success") if deleted: logger.info("Deleted app password for user %s", user_id) @@ -1599,7 +2074,7 @@ class RefreshTokenStorage: except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "error") + record_db_operation(self._dialect, "delete", duration, "error") raise async def get_all_app_password_user_ids(self) -> list[str]: @@ -1612,7 +2087,7 @@ class RefreshTokenStorage: if not self._initialized: await self.initialize() - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( "SELECT user_id FROM app_passwords ORDER BY updated_at DESC" ) as cursor: @@ -1732,24 +2207,21 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ - INSERT OR REPLACE INTO app_passwords + INSERT INTO app_passwords (user_id, encrypted_password, created_at, updated_at, scopes, username) - VALUES ( - ?, - ?, - COALESCE((SELECT created_at FROM app_passwords WHERE user_id = ?), ?), - ?, - ?, - ? - ) + VALUES (?, ?, ?, ?, ?, ?) + ON CONFLICT (user_id) DO UPDATE SET + encrypted_password = EXCLUDED.encrypted_password, + updated_at = EXCLUDED.updated_at, + scopes = EXCLUDED.scopes, + username = EXCLUDED.username """, ( user_id, encrypted_password, - user_id, now, now, scopes_json, @@ -1759,7 +2231,7 @@ class RefreshTokenStorage: await db.commit() duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "success") + record_db_operation(self._dialect, "insert", duration, "success") logger.info( "Stored scoped app password for user %s (scopes=%s, username=%s)", user_id, @@ -1769,7 +2241,7 @@ class RefreshTokenStorage: except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "error") + record_db_operation(self._dialect, "insert", duration, "error") raise await self._audit_log( @@ -1799,7 +2271,7 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( """ SELECT encrypted_password, scopes, username, created_at, updated_at @@ -1812,7 +2284,7 @@ class RefreshTokenStorage: if not row: logger.debug("No app password found for user %s", user_id) duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return None encrypted_password, scopes_json, username, created_at, updated_at = row @@ -1820,7 +2292,7 @@ class RefreshTokenStorage: scopes = json.loads(scopes_json) if scopes_json else None duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return { "app_password": decrypted_password, @@ -1832,7 +2304,7 @@ class RefreshTokenStorage: except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "error") + record_db_operation(self._dialect, "select", duration, "error") raise async def update_app_password_scopes(self, user_id: str, scopes: list[str]) -> bool: @@ -1852,7 +2324,7 @@ class RefreshTokenStorage: now = int(time.time()) start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "UPDATE app_passwords SET scopes = ?, updated_at = ? WHERE user_id = ?", (scopes_json, now, user_id), @@ -1861,7 +2333,7 @@ class RefreshTokenStorage: updated = cursor.rowcount > 0 duration = time.time() - start_time - record_db_operation("sqlite", "update", duration, "success") + record_db_operation(self._dialect, "update", duration, "success") if updated: await self._audit_log( @@ -1874,7 +2346,7 @@ class RefreshTokenStorage: except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "update", duration, "error") + record_db_operation(self._dialect, "update", duration, "error") raise # ── Login Flow v2: Session Tracking ────────────────────────────────── @@ -1913,13 +2385,19 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: await db.execute( """ - INSERT OR REPLACE INTO login_flow_sessions + INSERT INTO login_flow_sessions (user_id, encrypted_poll_token, poll_endpoint, requested_scopes, created_at, expires_at) VALUES (?, ?, ?, ?, ?, ?) + ON CONFLICT (user_id) DO UPDATE SET + encrypted_poll_token = EXCLUDED.encrypted_poll_token, + poll_endpoint = EXCLUDED.poll_endpoint, + requested_scopes = EXCLUDED.requested_scopes, + created_at = EXCLUDED.created_at, + expires_at = EXCLUDED.expires_at """, ( user_id, @@ -1933,12 +2411,12 @@ class RefreshTokenStorage: await db.commit() duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "success") + record_db_operation(self._dialect, "insert", duration, "success") logger.info("Stored login flow session for user %s", user_id) except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "insert", duration, "error") + record_db_operation(self._dialect, "insert", duration, "error") raise async def get_login_flow_session(self, user_id: str) -> dict[str, Any] | None: @@ -1965,7 +2443,7 @@ class RefreshTokenStorage: now = int(time.time()) start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: async with db.execute( """ SELECT encrypted_poll_token, poll_endpoint, requested_scopes, @@ -1979,7 +2457,7 @@ class RefreshTokenStorage: if not row: duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return None encrypted_token, poll_endpoint, scopes_json, created_at, expires_at = row @@ -1987,7 +2465,7 @@ class RefreshTokenStorage: requested_scopes = json.loads(scopes_json) if scopes_json else None duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "success") + record_db_operation(self._dialect, "select", duration, "success") return { "poll_token": poll_token, @@ -1999,7 +2477,7 @@ class RefreshTokenStorage: except Exception as e: duration = time.time() - start_time - record_db_operation("sqlite", "select", duration, "error") + record_db_operation(self._dialect, "select", duration, "error") logger.error( "Failed to retrieve login flow session for user %s: %s", user_id, e ) @@ -2019,7 +2497,7 @@ class RefreshTokenStorage: start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM login_flow_sessions WHERE user_id = ?", (user_id,), @@ -2028,7 +2506,7 @@ class RefreshTokenStorage: deleted = cursor.rowcount > 0 duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "success") + record_db_operation(self._dialect, "delete", duration, "success") if deleted: logger.info("Deleted login flow session for user %s", user_id) @@ -2042,7 +2520,7 @@ class RefreshTokenStorage: except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "error") + record_db_operation(self._dialect, "delete", duration, "error") raise async def delete_expired_login_flow_sessions(self) -> int: @@ -2057,7 +2535,7 @@ class RefreshTokenStorage: now = int(time.time()) start_time = time.time() try: - async with aiosqlite.connect(self.db_path) as db: + async with self._db() as db: cursor = await db.execute( "DELETE FROM login_flow_sessions WHERE expires_at <= ?", (now,), @@ -2066,7 +2544,7 @@ class RefreshTokenStorage: count = cursor.rowcount duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "success") + record_db_operation(self._dialect, "delete", duration, "success") if count > 0: logger.info("Cleaned up %s expired login flow sessions", count) @@ -2080,7 +2558,7 @@ class RefreshTokenStorage: except Exception: duration = time.time() - start_time - record_db_operation("sqlite", "delete", duration, "error") + record_db_operation(self._dialect, "delete", duration, "error") raise diff --git a/nextcloud_mcp_server/cli.py b/nextcloud_mcp_server/cli.py index ee6b045c..15e7de1f 100644 --- a/nextcloud_mcp_server/cli.py +++ b/nextcloud_mcp_server/cli.py @@ -5,8 +5,8 @@ import click import uvicorn from nextcloud_mcp_server.config import ( + get_database_url, get_settings, - get_token_db_path, is_ephemeral_token_db, ) from nextcloud_mcp_server.migrations import ( @@ -287,27 +287,67 @@ def db(): pass -def _warn_if_ephemeral(database_path: str) -> None: - if is_ephemeral_token_db(database_path): +def _resolve_db_url(database_url: str | None, database_path: str | None) -> str: + """Pick the database URL for a CLI subcommand. + + Priority: explicit ``--database-url`` > legacy ``--database-path`` + (treated as a SQLite file) > :func:`get_database_url` (honors + ``DATABASE_URL`` env or falls back to the ephemeral SQLite tempfile). + """ + if database_url: + return database_url + if database_path: + return f"sqlite+aiosqlite:///{database_path}" + return get_database_url() + + +def _warn_if_ephemeral(database_url: str) -> None: + """Warn when the resolved URL is the per-process SQLite tempfile.""" + if not database_url.startswith( + "sqlite+aiosqlite:///" + ) and not database_url.startswith("sqlite:///"): + return + path = database_url.split("///", 1)[1] + if is_ephemeral_token_db(path): click.echo( click.style( - f"⚠ Using ephemeral tempfile {database_path}; changes " - "will be lost on exit. Pass --database-path or set " - "TOKEN_STORAGE_DB to operate on a persistent database.", + f"⚠ Using ephemeral tempfile {path}; changes " + "will be lost on exit. Pass --database-url / --database-path " + "or set DATABASE_URL / TOKEN_STORAGE_DB to operate on a " + "persistent database.", fg="yellow", ), err=True, ) +def _db_target_options(fn): + """Attach the shared ``--database-url`` / ``--database-path`` options. + + Using a decorator factory rather than ``**kwargs`` dict-expansion so + static type checkers (ty) see ``click.option`` called with literal + keyword arguments, which is the only form it's typed to accept. + """ + fn = click.option( + "--database-path", + "-d", + envvar="TOKEN_STORAGE_DB", + default=None, + help="SQLite database file path. Equivalent to " + "--database-url sqlite+aiosqlite:///.", + )(fn) + fn = click.option( + "--database-url", + "-u", + envvar="DATABASE_URL", + default=None, + help="SQLAlchemy URL (e.g. postgresql+asyncpg://...). Wins over --database-path.", + )(fn) + return fn + + @db.command() -@click.option( - "--database-path", - "-d", - envvar="TOKEN_STORAGE_DB", - default=None, - help="Path to token storage database (can also use TOKEN_STORAGE_DB env var)", -) +@_db_target_options @click.option( "--revision", "-r", @@ -315,7 +355,7 @@ def _warn_if_ephemeral(database_path: str) -> None: show_default=True, help="Target revision (default: head for latest)", ) -def upgrade(database_path: str | None, revision: str): +def upgrade(database_url: str | None, database_path: str | None, revision: str): """Upgrade database to a specific revision. \b @@ -323,17 +363,17 @@ def upgrade(database_path: str | None, revision: str): # Upgrade to latest version $ nextcloud-mcp-server db upgrade - # Upgrade to specific revision - $ nextcloud-mcp-server db upgrade --revision 001 + # Upgrade a Postgres backend + $ nextcloud-mcp-server db upgrade -u postgresql+asyncpg://mcp:mcp@db/mcp - # Use custom database path + # Use custom SQLite path $ nextcloud-mcp-server db upgrade -d /path/to/tokens.db """ - database_path = database_path or get_token_db_path() - _warn_if_ephemeral(database_path) + url = _resolve_db_url(database_url, database_path) + _warn_if_ephemeral(url) try: click.echo(f"Upgrading database to revision: {revision}") - upgrade_database(database_path, revision) + upgrade_database(url, revision) click.echo(click.style("✓ Database upgraded successfully", fg="green")) except Exception as e: click.echo(click.style(f"✗ Upgrade failed: {e}", fg="red"), err=True) @@ -341,13 +381,7 @@ def upgrade(database_path: str | None, revision: str): @db.command() -@click.option( - "--database-path", - "-d", - envvar="TOKEN_STORAGE_DB", - default=None, - help="Path to token storage database", -) +@_db_target_options @click.option( "--revision", "-r", @@ -358,27 +392,16 @@ def upgrade(database_path: str | None, revision: str): @click.confirmation_option( prompt="Are you sure you want to downgrade the database? This may result in data loss." ) -def downgrade(database_path: str | None, revision: str): +def downgrade(database_url: str | None, database_path: str | None, revision: str): """Downgrade database to a specific revision. WARNING: This may result in data loss! Use with caution. - - \b - Examples: - # Downgrade by one version - $ nextcloud-mcp-server db downgrade - - # Downgrade to specific revision - $ nextcloud-mcp-server db downgrade --revision 001 - - # Downgrade to base (empty database) - $ nextcloud-mcp-server db downgrade --revision base """ - database_path = database_path or get_token_db_path() - _warn_if_ephemeral(database_path) + url = _resolve_db_url(database_url, database_path) + _warn_if_ephemeral(url) try: click.echo(f"Downgrading database to revision: {revision}") - downgrade_database(database_path, revision) + downgrade_database(url, revision) click.echo(click.style("✓ Database downgraded successfully", fg="green")) except Exception as e: click.echo(click.style(f"✗ Downgrade failed: {e}", fg="red"), err=True) @@ -386,24 +409,13 @@ def downgrade(database_path: str | None, revision: str): @db.command() -@click.option( - "--database-path", - "-d", - envvar="TOKEN_STORAGE_DB", - default=None, - help="Path to token storage database", -) -def current(database_path: str | None): - """Show current database revision. - - \b - Example: - $ nextcloud-mcp-server db current - """ - database_path = database_path or get_token_db_path() - _warn_if_ephemeral(database_path) +@_db_target_options +def current(database_url: str | None, database_path: str | None): + """Show current database revision.""" + url = _resolve_db_url(database_url, database_path) + _warn_if_ephemeral(url) try: - revision = get_current_revision(database_path) + revision = get_current_revision(url) if revision: click.echo(f"Current revision: {click.style(revision, fg='cyan')}") else: @@ -420,25 +432,14 @@ def current(database_path: str | None): @db.command() -@click.option( - "--database-path", - "-d", - envvar="TOKEN_STORAGE_DB", - default=None, - help="Path to token storage database", -) -def history(database_path: str | None): - """Show migration history. - - \b - Example: - $ nextcloud-mcp-server db history - """ - database_path = database_path or get_token_db_path() - _warn_if_ephemeral(database_path) +@_db_target_options +def history(database_url: str | None, database_path: str | None): + """Show migration history.""" + url = _resolve_db_url(database_url, database_path) + _warn_if_ephemeral(url) try: click.echo("Migration history:") - show_migration_history(database_path) + show_migration_history(url) except Exception as e: click.echo(click.style(f"✗ Failed to show history: {e}", fg="red"), err=True) raise click.ClickException(str(e)) diff --git a/nextcloud_mcp_server/config.py b/nextcloud_mcp_server/config.py index 85a1d6df..0a1730dc 100644 --- a/nextcloud_mcp_server/config.py +++ b/nextcloud_mcp_server/config.py @@ -56,6 +56,25 @@ _DEFAULTS: dict[str, Any] = { # None = ephemeral per-process tempfile (see get_token_db_path()). # Set TOKEN_STORAGE_DB to persist tokens across restarts. "token_storage_db": None, + # Centralized backend (any SQLAlchemy URL). Wins over TOKEN_STORAGE_DB + # when set. Use postgresql+asyncpg://user:pw@host/db for HA k8s + # deployments so pods can be stateless. See ADR-026. + "database_url": None, + # TLS for the Postgres backend (mirror NEXTCLOUD_VERIFY_SSL pattern). + # Default is None — preserve asyncpg's `prefer` mode so cluster-local + # Postgres without TLS works out of the box. Set to True for full + # verification or False to silence cert errors against self-signed + # homelab servers. DATABASE_CA_BUNDLE points at a private-CA PEM. + "database_verify_ssl": None, + "database_ca_bundle": None, + # Postgres connection pool sizing (ADR-026 → "Concurrency model and + # pool sizing"). Per-pod defaults to 2 + 5 overflow = 7 max + # connections. asyncpg connections are single-flight, so the pool + # only needs to cover typical multi-user MCP burst — not every + # potential in-flight tool call. Tune up with DATABASE_POOL_SIZE / + # DATABASE_MAX_OVERFLOW for high-traffic prod fleets. + "database_pool_size": 2, + "database_max_overflow": 5, # Webhook delivery authentication (ADR-010): when set, registrations # tell NC to add `Authorization: Bearer ` to webhook deliveries # and the receiver rejects unauthenticated requests. @@ -279,6 +298,58 @@ def is_ephemeral_token_db(path: str) -> bool: return path == _ephemeral_db_path +def get_database_url() -> str: + """Resolve the SQLAlchemy database URL for token storage. + + Priority: + 1. ``DATABASE_URL`` if set — any SQLAlchemy URL is accepted; the primary + supported backends are ``postgresql+asyncpg://...`` for HA k8s + deployments and ``sqlite+aiosqlite:///...`` for development. + 2. Otherwise build ``sqlite+aiosqlite:///{get_token_db_path()}`` so the + legacy ``TOKEN_STORAGE_DB`` env var and the ephemeral-tempfile + fallback both keep working unchanged. + """ + explicit = _dynaconf.get("DATABASE_URL") + if explicit: + return str(explicit) + return f"sqlite+aiosqlite:///{get_token_db_path()}" + + +def is_sqlite_url(url: str) -> bool: + """Return True for SQLite SQLAlchemy URLs (used to gate sqlite-only logic + like file-permission hardening and ``sqlite_master`` legacy lookups). + + Recognizes both file-backed (``sqlite+aiosqlite:///path/to/db``) and + in-memory (``sqlite+aiosqlite:///:memory:``) URLs. The caller is + responsible for handling ``:memory:`` as a magic value where a real + filesystem path is expected. + """ + return url.lower().startswith("sqlite") + + +def mask_db_password(url: str) -> str: + """Return a logger-safe rendering of a SQLAlchemy URL. + + DATABASE_URL routinely carries a password (e.g. + ``postgresql+asyncpg://mcp:secret@db/mcp``); logging it raw leaks the + secret to stdout/stderr and any aggregator. SQLAlchemy's + :func:`make_url` + ``render_as_string(hide_password=True)`` substitutes + a fixed ``***`` placeholder while keeping the rest of the URL intact + so operators can still see which host / driver they're hitting. + """ + try: + from sqlalchemy.engine.url import make_url # noqa: PLC0415 + + return make_url(url).render_as_string(hide_password=True) + except Exception: + # If parsing fails (e.g. an explicit ssl-disable test URL with an + # exotic shape), fall back to a regex that scrubs any + # ``://user:password@`` pattern. Never raise from a logging path. + import re # noqa: PLC0415 + + return re.sub(r"(://[^:/]+):[^@]*@", r"\1:***@", url) + + LOGGING_CONFIG = { "version": 1, "disable_existing_loggers": False, @@ -442,6 +513,22 @@ class Settings: nextcloud_verify_ssl: bool = True nextcloud_ca_bundle: str | None = None + # Postgres backend TLS settings (ADR-026). Default verify_ssl is None, + # not True: when DATABASE_URL is unset there's nothing to verify, and + # when it is set we don't want to break cluster-internal Postgres that + # commonly runs without TLS. Operators opt in to verify-full with True + # or supply a private-CA bundle. + database_verify_ssl: bool | None = None + database_ca_bundle: str | None = None + # Postgres connection pool sizing (ADR-026). The asyncpg engine maps + # these to its underlying QueuePool. Per-pod max = pool_size + + # max_overflow. Defaults are intentionally small (2 + 5 = 7) because + # asyncpg connections are single-flight and the typical MCP workload + # is light read-mostly point lookups. Validate >= 1 / >= 0 in + # __post_init__. + database_pool_size: int = 2 + database_max_overflow: int = 5 + # ADR-005: Token Audience Validation (required for OAuth mode) nextcloud_mcp_server_url: str | None = None # MCP server URL (used as audience) nextcloud_resource_uri: str | None = None # Nextcloud resource identifier @@ -575,6 +662,35 @@ class Settings: ) logger.info("Using custom CA bundle: %s", self.nextcloud_ca_bundle) + # Validate Postgres backend TLS configuration (ADR-026) + if self.database_verify_ssl is False: + logger.warning( + "DATABASE_VERIFY_SSL is disabled. " + "TLS certificate verification is turned off for the Postgres " + "backend. Only acceptable for homelab / self-signed setups; " + "prefer DATABASE_CA_BUNDLE for production." + ) + if self.database_ca_bundle: + if not os.path.isfile(self.database_ca_bundle): + raise ValueError( + f"DATABASE_CA_BUNDLE path does not exist: {self.database_ca_bundle}" + ) + logger.info( + "Using custom CA bundle for Postgres backend: %s", + self.database_ca_bundle, + ) + + # Pool sizing must be sensible — guard against operators accidentally + # setting 0 / negative via env (would deadlock at first request). + if self.database_pool_size < 1: + raise ValueError( + f"DATABASE_POOL_SIZE must be >= 1; got {self.database_pool_size}" + ) + if self.database_max_overflow < 0: + raise ValueError( + f"DATABASE_MAX_OVERFLOW must be >= 0; got {self.database_max_overflow}" + ) + # Ensure mutual exclusivity if self.qdrant_url and self.qdrant_location: raise ValueError( @@ -930,6 +1046,12 @@ def get_settings() -> Settings: # Nextcloud SSL/TLS settings "nextcloud_verify_ssl": "NEXTCLOUD_VERIFY_SSL", "nextcloud_ca_bundle": "NEXTCLOUD_CA_BUNDLE", + # Postgres backend TLS (ADR-026) + "database_verify_ssl": "DATABASE_VERIFY_SSL", + "database_ca_bundle": "DATABASE_CA_BUNDLE", + # Postgres backend pool sizing (ADR-026) + "database_pool_size": "DATABASE_POOL_SIZE", + "database_max_overflow": "DATABASE_MAX_OVERFLOW", # ADR-005: Token Audience Validation "nextcloud_mcp_server_url": "NEXTCLOUD_MCP_SERVER_URL", "nextcloud_resource_uri": "NEXTCLOUD_RESOURCE_URI", @@ -1028,3 +1150,45 @@ def get_nextcloud_ssl_verify() -> bool | ssl.SSLContext: ctx = ssl.create_default_context(cafile=settings.nextcloud_ca_bundle) return ctx return True + + +def get_database_ssl() -> bool | ssl.SSLContext | None: + """Return the asyncpg ``ssl`` arg for the Postgres backend (ADR-026). + + Returns: + - ``None`` when both DATABASE_VERIFY_SSL and DATABASE_CA_BUNDLE are + unset — caller skips passing ``ssl`` so asyncpg keeps its default + (``prefer``). Preserves PR #798 behavior for cluster-local + Postgres without TLS. + - ``False`` if DATABASE_VERIFY_SSL=false (silence cert errors). + - ``ssl.SSLContext`` if DATABASE_CA_BUNDLE is set (custom private + CA, implies verify-full). + - ``True`` if DATABASE_VERIFY_SSL=true and no bundle (verify-full + against system trust store). + + DATABASE_VERIFY_SSL=false wins over DATABASE_CA_BUNDLE so an operator + can quickly silence cert errors during incident response without + having to delete the bundle path from their secret store. Matches the + Nextcloud-pattern precedence for symmetry with + :func:`get_nextcloud_ssl_verify`. + """ + settings = get_settings() + if settings.database_verify_ssl is False: + # Operator-explicit opt-out (DATABASE_VERIFY_SSL=false) — semantics + # are documented in the docstring above and ADR-026 TLS section. + # Bare NOSONAR silences any cert-verification-required rule that + # may fire on this branch (defensive; no such rule fires today). + return False # NOSONAR + if settings.database_ca_bundle: + # ``ssl.create_default_context()`` on Python 3.10+ already negotiates + # the strongest available protocol (TLS 1.2+ with secure ciphers); + # we pin Python 3.11+ in pyproject.toml. ``purpose=SERVER_AUTH`` is + # the default but spelt out here so the intent is visible to + # static analysers and human readers alike. + return ssl.create_default_context( # NOSONAR + purpose=ssl.Purpose.SERVER_AUTH, + cafile=settings.database_ca_bundle, + ) + if settings.database_verify_ssl is True: + return True + return None diff --git a/nextcloud_mcp_server/migrations.py b/nextcloud_mcp_server/migrations.py index 15b5274c..de82af5d 100644 --- a/nextcloud_mcp_server/migrations.py +++ b/nextcloud_mcp_server/migrations.py @@ -3,22 +3,72 @@ This module provides helper functions for managing Alembic database migrations programmatically. It enables automatic migration on application startup and provides CLI integration. + +All helpers accept a SQLAlchemy URL (``sqlite+aiosqlite:///...`` or +``postgresql+asyncpg://...``). When called without an explicit URL they fall +back to :func:`nextcloud_mcp_server.config.get_database_url`. """ import logging -import sqlite3 from pathlib import Path from alembic.config import Config +from sqlalchemy import create_engine, inspect, text import nextcloud_mcp_server.alembic as alembic_package from alembic import command -from nextcloud_mcp_server.config import get_token_db_path +from nextcloud_mcp_server.config import get_database_url, mask_db_password logger = logging.getLogger(__name__) -def get_alembic_config(database_path: str | Path | None = None) -> Config: +def _coerce_url(database_url: str | Path | None) -> str: + """Accept either a URL string, a Path (legacy SQLite path), or None. + + A bare ``Path`` is interpreted as a SQLite database file for backward + compatibility with the prior path-based API. + """ + if database_url is None: + return get_database_url() + if isinstance(database_url, Path): + return f"sqlite+aiosqlite:///{database_url.resolve()}" + return database_url + + +_KNOWN_ASYNC_DRIVERS = ("aiosqlite", "asyncpg") + + +def _to_sync_url(database_url: str) -> str: + """Map an async driver URL to its sync equivalent for blocking inspection. + + SQLAlchemy's :func:`inspect` and :func:`create_engine` used below are + synchronous APIs. The runtime uses async drivers (``aiosqlite``, + ``asyncpg``) but Alembic and these utility queries don't need them. + + Emits a one-shot warning when the URL carries an async-driver + suffix we don't recognize — the sync engine creation downstream + will still fail, but with a clearer hint than SQLAlchemy's generic + "Can't load plugin" error. + """ + out = database_url + for driver in _KNOWN_ASYNC_DRIVERS: + out = out.replace(f"+{driver}", "") + # Detect a leftover ``+`` token (we know the URL is + # ``scheme[+driver]://...``, so a remaining ``+`` before ``://`` + # means an unrecognized async driver). Log once and pass through. + head = out.split("://", 1)[0] + if "+" in head: + unknown = head.split("+", 1)[1] + logger.warning( + "_to_sync_url: unrecognized driver %r in DATABASE_URL; " + "passing through unchanged. Supported async drivers: %s", + unknown, + ", ".join(_KNOWN_ASYNC_DRIVERS), + ) + return out + + +def get_alembic_config(database_url: str | Path | None = None) -> Config: """ Get Alembic configuration for programmatic use. @@ -26,145 +76,102 @@ def get_alembic_config(database_path: str | Path | None = None) -> Config: package location instead of alembic.ini file. Args: - database_path: Path to SQLite database file. If None, resolves via - config.get_token_db_path() (ephemeral tempfile unless - TOKEN_STORAGE_DB is set). + database_url: SQLAlchemy URL. If None, resolves via + :func:`get_database_url` (DATABASE_URL env var, falling back + to the ephemeral SQLite tempfile under ``TOKEN_STORAGE_DB``). + For backward compatibility a ``Path`` is treated as a SQLite + file path. Returns: - Alembic Config object configured for the specified database + Alembic Config object configured for the resolved URL. """ - # Use package location (works in both editable and installed modes) if alembic_package.__file__ is None: raise RuntimeError("alembic package __file__ is None") script_location = Path(alembic_package.__file__).parent - # Create config programmatically (no alembic.ini needed at runtime) config = Config() config.set_main_option("script_location", str(script_location)) - config.set_main_option("path_separator", "os") # Suppress deprecation warning + config.set_main_option("path_separator", "os") - # Set database URL - if database_path: - db_path = Path(database_path).resolve() - else: - db_path = Path(get_token_db_path()).resolve() - - url = f"sqlite+aiosqlite:///{db_path}" + url = _coerce_url(database_url) config.set_main_option("sqlalchemy.url", url) logger.debug("Alembic script location: %s", script_location) - logger.debug("Database: %s", db_path) + logger.debug("Database URL: %s", mask_db_password(url)) return config def upgrade_database( - database_path: str | Path | None = None, revision: str = "head" + database_url: str | Path | None = None, revision: str = "head" ) -> None: - """ - Upgrade database to a specific revision. - - Args: - database_path: Path to SQLite database file - revision: Target revision (default: "head" for latest) - """ - config = get_alembic_config(database_path) + """Upgrade database to a specific revision (default: latest).""" + config = get_alembic_config(database_url) logger.info("Upgrading database to revision: %s", revision) command.upgrade(config, revision) logger.info("Database upgrade completed successfully") def downgrade_database( - database_path: str | Path | None = None, revision: str = "-1" + database_url: str | Path | None = None, revision: str = "-1" ) -> None: - """ - Downgrade database to a specific revision. - - Args: - database_path: Path to SQLite database file - revision: Target revision (default: "-1" for previous version) - """ - config = get_alembic_config(database_path) + """Downgrade database to a specific revision (default: previous).""" + config = get_alembic_config(database_url) logger.warning("Downgrading database to revision: %s", revision) command.downgrade(config, revision) logger.info("Database downgrade completed successfully") -def get_current_revision(database_path: str | Path | None = None) -> str | None: +def get_current_revision(database_url: str | Path | None = None) -> str | None: """ - Get the current database revision by directly querying the alembic_version table. + Get the current database revision by reading the ``alembic_version`` table. - Args: - database_path: Path to SQLite database file - - Returns: - Current revision ID or None if not versioned + Returns ``None`` when the database does not exist or has no + ``alembic_version`` table (i.e. has never been migrated). """ + url = _to_sync_url(_coerce_url(database_url)) - if database_path is None: - database_path = get_token_db_path() - - db_path = Path(database_path).resolve() - - if not db_path.exists(): - logger.debug("Database does not exist: %s", db_path) - return None - - try: - # Query alembic_version table directly - conn = sqlite3.connect(str(db_path)) - cursor = conn.cursor() - - # Check if alembic_version table exists - cursor.execute( - "SELECT name FROM sqlite_master WHERE type='table' AND name='alembic_version'" - ) - has_table = cursor.fetchone() is not None - - if not has_table: - conn.close() + if url.startswith("sqlite:///"): + path = url[len("sqlite:///") :] + if path and not Path(path).exists(): + logger.debug("Database does not exist: %s", path) return None - # Get current version - cursor.execute("SELECT version_num FROM alembic_version") - row = cursor.fetchone() - conn.close() - - return row[0] if row else None - + try: + engine = create_engine(url, future=True) + try: + inspector = inspect(engine) + if not inspector.has_table("alembic_version"): + return None + with engine.connect() as conn: + row = conn.execute( + text("SELECT version_num FROM alembic_version") + ).fetchone() + return row[0] if row else None + finally: + engine.dispose() except Exception as e: logger.error("Failed to get current revision: %s", e) return None def stamp_database( - database_path: str | Path | None = None, revision: str = "head" + database_url: str | Path | None = None, revision: str = "head" ) -> None: """ Stamp database with a specific revision without running migrations. - This is useful for marking existing databases that were created before - Alembic was introduced. It tells Alembic "this database is at revision X" - without actually running the migration. - - Args: - database_path: Path to SQLite database file - revision: Revision to stamp (default: "head" for latest) + Useful for marking pre-Alembic databases as already at a known revision. """ - config = get_alembic_config(database_path) + config = get_alembic_config(database_url) logger.info("Stamping database with revision: %s", revision) command.stamp(config, revision) logger.info("Database stamped successfully") -def show_migration_history(database_path: str | Path | None = None) -> None: - """ - Display migration history. - - Args: - database_path: Path to SQLite database file - """ - config = get_alembic_config(database_path) +def show_migration_history(database_url: str | Path | None = None) -> None: + """Display migration history.""" + config = get_alembic_config(database_url) command.history(config, verbose=True) @@ -178,7 +185,9 @@ def create_migration(message: str, autogenerate: bool = False) -> None: Note: Since we don't use SQLAlchemy models, autogenerate will be disabled - and migrations must be written manually. + and migrations must be written manually using portable Alembic + operations (``op.create_table``, ``op.add_column`` …) rather than + raw SQL so they work on both SQLite and Postgres. """ config = get_alembic_config() logger.info("Creating new migration: %s", message) diff --git a/pyproject.toml b/pyproject.toml index 1e5c205d..e3794064 100644 --- a/pyproject.toml +++ b/pyproject.toml @@ -45,6 +45,7 @@ dependencies = [ "openai>=2.8.1", "dynaconf>=3.2.13,<4.0", "mistralai>=2.4.5", + "sqlalchemy[asyncio]>=2.0", ] classifiers = [ "Development Status :: 4 - Beta", @@ -78,6 +79,7 @@ markers = [ "keycloak: OAuth tests that utilize keycloak external identity provider", "login_flow: Login Flow v2 integration tests (ADR-022)", "multi_user_basic: Multi-user BasicAuth pass-through tests (ADR-020)", + "postgres: Tests requiring the docker-compose postgres-test service (ADR-026)", ] testpaths = [ "tests", @@ -128,6 +130,11 @@ dev = [ [project.scripts] nextcloud-mcp-server = "nextcloud_mcp_server.cli:cli" +[project.optional-dependencies] +postgres = [ + "asyncpg>=0.29", +] + [[tool.uv.index]] name = "testpypi" url = "https://test.pypi.org/simple/" diff --git a/tests/fixtures/__init__.py b/tests/fixtures/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/tests/fixtures/storage_backend.py b/tests/fixtures/storage_backend.py new file mode 100644 index 00000000..22a7f2e1 --- /dev/null +++ b/tests/fixtures/storage_backend.py @@ -0,0 +1,97 @@ +"""Shared pytest fixture for parametrizing storage tests over backends. + +Tests for ``RefreshTokenStorage`` are exercised against every backend that is +available in the current environment: + +- ``sqlite`` — always available; uses a per-test tempfile. +- ``postgres`` — opt-in. Bring up the test instance with:: + + docker compose --profile postgres up -d postgres-test + + and export the URL so the fixture picks it up:: + + export TEST_DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp + + When ``TEST_DATABASE_URL`` is unset (or the host is unreachable), the + Postgres parametrization is skipped automatically so the suite still runs + cleanly without Docker. + +Each Postgres test runs against an isolated schema that is dropped and +recreated between tests, mirroring the per-tempfile isolation that the +SQLite path gets for free. +""" + +from __future__ import annotations + +import os +from typing import Any + +import pytest + + +def _postgres_url() -> str | None: + """Resolve the Postgres URL for tests, or ``None`` when opted out.""" + return os.environ.get("TEST_DATABASE_URL") or None + + +def _postgres_reachable(url: str) -> bool: + """Return ``True`` if the configured Postgres accepts TCP connections. + + A lightweight socket probe is used rather than a full DB handshake so + we don't have to ship a sync Postgres driver (psycopg2) just for the + test gate — asyncpg only works inside an event loop. + """ + import socket + from urllib.parse import urlparse + + try: + parsed = urlparse(url) + host = parsed.hostname or "localhost" + port = parsed.port or 5432 + with socket.create_connection((host, port), timeout=1.0): + return True + except OSError: + return False + + +def _backend_params() -> list[Any]: + """Build the pytest parametrize list, gating Postgres on availability.""" + params: list[Any] = [pytest.param("sqlite", id="sqlite")] + url = _postgres_url() + if url and _postgres_reachable(url): + params.append(pytest.param(url, id="postgres")) + return params + + +@pytest.fixture(params=_backend_params()) +def storage_backend(request): + """Yield ``{"kind": ..., "url": ..., "reset": }`` per backend. + + For ``sqlite`` the test fixture builds its own tempfile path; only the + ``kind`` discriminator is used. For ``postgres`` the URL is forwarded + and a ``reset()`` coroutine is provided so test fixtures can wipe the + schema between parametrized runs. + """ + if request.param == "sqlite": + yield {"kind": "sqlite"} + return + + url = request.param + + async def reset() -> None: + # Use a fresh async engine so we don't fight an async connection + # the test might still be holding open at teardown time. asyncpg + # is the only driver we ship for Postgres, so the reset path stays + # event-loop-only (no psycopg2 dependency required). + from sqlalchemy import text + from sqlalchemy.ext.asyncio import create_async_engine + + engine = create_async_engine(url, future=True) + try: + async with engine.begin() as conn: + await conn.execute(text("DROP SCHEMA public CASCADE")) + await conn.execute(text("CREATE SCHEMA public")) + finally: + await engine.dispose() + + yield {"kind": "postgres", "url": url, "reset": reset} diff --git a/tests/integration/test_storage_postgres.py b/tests/integration/test_storage_postgres.py new file mode 100644 index 00000000..3173a594 --- /dev/null +++ b/tests/integration/test_storage_postgres.py @@ -0,0 +1,325 @@ +"""End-to-end Postgres backend smoke for RefreshTokenStorage (ADR-026). + +Exercises every storage method touched by the SQLAlchemy / asyncpg port +against a fresh Postgres schema. The test is opt-in: it requires the +``postgres-test`` docker-compose service to be running and +``TEST_DATABASE_URL`` to be exported. + +Bring up the dependency once:: + + docker compose --profile postgres up -d postgres-test + export TEST_DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp + +Then run:: + + uv run pytest tests/integration/test_storage_postgres.py -v -m postgres + +When ``TEST_DATABASE_URL`` is unset (or the service is unreachable) the +test is skipped so the full suite still passes locally without Docker. +""" + +from __future__ import annotations + +import os +import socket +from urllib.parse import urlparse + +import pytest +from cryptography.fernet import Fernet + +from nextcloud_mcp_server.auth.storage import RefreshTokenStorage + +pytestmark = [pytest.mark.integration, pytest.mark.postgres] + + +def _postgres_url() -> str | None: + return os.environ.get("TEST_DATABASE_URL") or None + + +def _reachable(url: str) -> bool: + parsed = urlparse(url) + try: + with socket.create_connection( + (parsed.hostname or "localhost", parsed.port or 5432), timeout=1.0 + ): + return True + except OSError: + return False + + +@pytest.fixture +def postgres_url() -> str: + url = _postgres_url() + if not url: + pytest.skip( + "TEST_DATABASE_URL not set — run " + "`docker compose --profile postgres up -d postgres-test` and export " + "TEST_DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp" + ) + if not _reachable(url): + pytest.skip(f"Postgres at {url} is not reachable") + return url + + +@pytest.fixture +async def reset_schema(postgres_url: str): + """Drop+recreate the public schema before and after each test.""" + from sqlalchemy import text + from sqlalchemy.ext.asyncio import create_async_engine + + async def _reset() -> None: + engine = create_async_engine(postgres_url, future=True) + try: + async with engine.begin() as conn: + await conn.execute(text("DROP SCHEMA public CASCADE")) + await conn.execute(text("CREATE SCHEMA public")) + finally: + await engine.dispose() + + await _reset() + yield + await _reset() + + +@pytest.fixture +async def storage(postgres_url: str, reset_schema): + key = Fernet.generate_key() + s = RefreshTokenStorage(database_url=postgres_url, encryption_key=key) + await s.initialize() + yield s + + +async def test_refresh_token_roundtrip(storage: RefreshTokenStorage): + """Store + retrieve + upsert + delete a refresh token end-to-end.""" + await storage.store_refresh_token( + user_id="alice", refresh_token="rt-1", expires_at=9_999_999_999 + ) + tok = await storage.get_refresh_token("alice") + assert tok is not None + assert tok["refresh_token"] == "rt-1" + assert tok["expires_at"] == 9_999_999_999 + + # Upsert preserves user_id, swaps token contents. + await storage.store_refresh_token( + user_id="alice", refresh_token="rt-2", expires_at=9_999_999_999 + ) + tok = await storage.get_refresh_token("alice") + assert tok is not None and tok["refresh_token"] == "rt-2" + + assert await storage.delete_refresh_token("alice") is True + assert await storage.get_refresh_token("alice") is None + + +async def test_app_password_roundtrip(storage: RefreshTokenStorage): + """Store + retrieve + replace + delete a scoped app password. + + The ``app_password=`` keyword-arg literals are bound to local + variables so the bare ``# NOSONAR`` marker can anchor to the same + physical line as the literal — SonarQube's hard-coded-credential + heuristic ignores the marker otherwise. These are localhost test + fixtures with no production reach. + """ + bob_pw_v1 = "pw-1" # NOSONAR + await storage.store_app_password(user_id="bob", app_password=bob_pw_v1) + assert await storage.get_app_password("bob") == bob_pw_v1 + + # Replace path exercises the ON CONFLICT DO UPDATE on the singleton row. + bob_pw_v2 = "pw-2" # NOSONAR + await storage.store_app_password(user_id="bob", app_password=bob_pw_v2) + assert await storage.get_app_password("bob") == bob_pw_v2 + + assert await storage.delete_app_password("bob") is True + assert await storage.get_app_password("bob") is None + + +async def test_oauth_session_lifecycle(storage: RefreshTokenStorage): + """Cover the ADR-004 progressive-consent session table.""" + await storage.store_oauth_session( + session_id="sess-1", + client_redirect_uri="http://localhost:12345/callback", + mcp_authorization_code="mcp-code-abc", + flow_type="hybrid", + ttl_seconds=600, + ) + fetched = await storage.get_oauth_session("sess-1") + assert fetched is not None + assert fetched["mcp_authorization_code"] == "mcp-code-abc" + + by_code = await storage.get_oauth_session_by_mcp_code("mcp-code-abc") + assert by_code is not None and by_code["session_id"] == "sess-1" + + +async def test_webhook_tracking(storage: RefreshTokenStorage): + """Tracks webhook ↔ preset mappings via ON CONFLICT upserts.""" + await storage.store_webhook(webhook_id=101, preset_id="notes_sync") + await storage.store_webhook(webhook_id=202, preset_id="notes_sync") + await storage.store_webhook(webhook_id=303, preset_id="calendar_sync") + + assert sorted(await storage.get_webhooks_by_preset("notes_sync")) == [101, 202] + assert await storage.get_webhooks_by_preset("calendar_sync") == [303] + + # Re-storing the same webhook_id is a no-op upsert. + await storage.store_webhook(webhook_id=101, preset_id="notes_sync") + assert sorted(await storage.get_webhooks_by_preset("notes_sync")) == [101, 202] + + assert await storage.delete_webhook(webhook_id=101) is True + assert await storage.get_webhooks_by_preset("notes_sync") == [202] + + +async def test_audit_log_capture(storage: RefreshTokenStorage): + """Audit events from upstream methods land in audit_logs.""" + carol_pw = "x" # NOSONAR + await storage.store_app_password(user_id="carol", app_password=carol_pw) + logs = await storage.get_audit_logs(user_id="carol", limit=10) + assert any(entry["event"] == "store_app_password" for entry in logs) + + +async def test_cleanup_expired_roundtrip(storage: RefreshTokenStorage): + """``cleanup_expired_*`` paths rely on DELETE rowcount across dialects. + + Regression guard for the bot review on PR #798 — the original + integration tests didn't exercise these methods, which historically + have been a source of dialect-portability bugs. + """ + # Insert one fresh + one expired refresh token. + await storage.store_refresh_token( + user_id="fresh-user", refresh_token="fresh", expires_at=9_999_999_999 + ) + await storage.store_refresh_token( + user_id="expired-user", refresh_token="stale", expires_at=1 + ) + + # Insert one fresh + one expired OAuth session. + await storage.store_oauth_session( + session_id="sess-fresh", + client_redirect_uri="http://localhost/cb", + mcp_authorization_code="code-fresh", + ttl_seconds=600, + ) + await storage.store_oauth_session( + session_id="sess-stale", + client_redirect_uri="http://localhost/cb", + mcp_authorization_code="code-stale", + ttl_seconds=-3600, # expires_at = now - 1h + ) + + # Insert one fresh + one expired browser session. + await storage.create_browser_session( + session_id="bs-fresh", user_id="alice", ttl_seconds=600 + ) + await storage.create_browser_session( + session_id="bs-stale", user_id="alice", ttl_seconds=-3600 + ) + + tokens_deleted = await storage.cleanup_expired_tokens() + sessions_deleted = await storage.cleanup_expired_sessions() + browser_deleted = await storage.cleanup_expired_browser_sessions() + + assert tokens_deleted == 1, f"expected 1 expired token, got {tokens_deleted}" + assert sessions_deleted == 1, ( + f"expected 1 expired oauth session, got {sessions_deleted}" + ) + assert browser_deleted == 1, ( + f"expected 1 expired browser session, got {browser_deleted}" + ) + + # Fresh rows survived. + assert await storage.get_refresh_token("fresh-user") is not None + assert await storage.get_refresh_token("expired-user") is None + assert await storage.get_oauth_session("sess-fresh") is not None + assert await storage.get_oauth_session("sess-stale") is None + + +async def test_browser_session_delete_returning(storage: RefreshTokenStorage): + """Exercise the ``DELETE … RETURNING user_id`` path on Postgres. + + ``delete_browser_session`` is the only RETURNING clause in the + storage layer and the most dialect-sensitive SQL in this PR — it + needed SQLite ≥ 3.35 specifically because of RETURNING. Bot review + on PR #798 round 2 flagged that the existing cleanup test didn't + actually exercise this path. Asserts both the present and absent + cases so the asyncpg result-handling for RETURNING is covered. + """ + await storage.create_browser_session( + session_id="bs-returning", user_id="alice", ttl_seconds=600 + ) + assert await storage.get_browser_session_user("bs-returning") == "alice" + + assert await storage.delete_browser_session("bs-returning") is True + assert await storage.get_browser_session_user("bs-returning") is None + + # Deleting a nonexistent session returns False (RETURNING yields no + # row → rowcount path). + assert await storage.delete_browser_session("never-existed") is False + + +async def test_close_disposes_engine(postgres_url: str, reset_schema): + """``close()`` releases pooled asyncpg connections and is idempotent. + + PR #798 round-4 review (bot #4): the engine wasn't being disposed on + shutdown, leaking server-side connection slots until the Postgres + idle-in-transaction timeout fired. This test confirms ``close()`` + nulls the engine, leaves the storage in a non-initialized state, + and a second ``close()`` call is a no-op rather than an exception. + """ + s = RefreshTokenStorage( + database_url=postgres_url, encryption_key=Fernet.generate_key() + ) + await s.initialize() + assert s.engine is not None + assert s._initialized is True + + await s.close() + assert s.engine is None + assert s._initialized is False + + # Idempotent — second close is a no-op, no AttributeError. + await s.close() + assert s.engine is None + + +async def test_concurrent_initialize_serialized_by_advisory_lock( + postgres_url: str, reset_schema +): + """Concurrent pod startup must serialize on pg_advisory_lock. + + PR #798 round-4 review (bot #3): without a migration lock, two + pods racing the rolling-update can both detect ``has_alembic=False`` + and both run ``upgrade_database(URL, "head")``; the second crashes + with "relation already exists". This test spawns three concurrent + ``RefreshTokenStorage.initialize()`` calls against a fresh schema + and asserts all of them complete successfully (the advisory lock + serializes them; the second/third observe ``has_alembic=True`` + after the first commits and take the upgrade fast-path). + """ + import anyio + + async def init_one() -> None: + s = RefreshTokenStorage( + database_url=postgres_url, encryption_key=Fernet.generate_key() + ) + try: + await s.initialize() + finally: + await s.close() + + # No exception = serialization worked. Without the lock, this + # raised ``relation "refresh_tokens" already exists`` on the second + # task in CI runs prior to this fix. + async with anyio.create_task_group() as tg: + for _ in range(3): + tg.start_soon(init_one) + + # Verify the schema actually landed once, not three times: the + # alembic_version table should exist with one row at the head revision. + from sqlalchemy import text + from sqlalchemy.ext.asyncio import create_async_engine + + engine = create_async_engine(postgres_url, future=True) + try: + async with engine.connect() as conn: + result = await conn.execute(text("SELECT count(*) FROM alembic_version")) + (count,) = result.fetchone() + assert count == 1, f"expected 1 alembic_version row, got {count}" + finally: + await engine.dispose() diff --git a/tests/unit/conftest.py b/tests/unit/conftest.py index 29b3b160..51ba62a8 100644 --- a/tests/unit/conftest.py +++ b/tests/unit/conftest.py @@ -2,6 +2,11 @@ import pytest +# Re-export the parametrized storage backend fixture so it's auto-discovered +# by every unit test that names it as a parameter, without each test module +# having to import it explicitly. +from tests.fixtures.storage_backend import storage_backend # noqa: F401 + @pytest.fixture(autouse=True) def _reload_dynaconf_after_test(): diff --git a/tests/unit/test_app_password_storage.py b/tests/unit/test_app_password_storage.py index 37431974..ed2f425f 100644 --- a/tests/unit/test_app_password_storage.py +++ b/tests/unit/test_app_password_storage.py @@ -3,6 +3,12 @@ Unit tests for App Password Storage functionality. Tests the app password methods in RefreshTokenStorage for multi-user BasicAuth mode background sync. + +These tests are parametrized over both supported backends so the storage +layer is exercised against SQLite (default, always runs) and Postgres (gated +on ``TEST_DATABASE_URL``; bring up ``docker compose --profile postgres up +-d postgres-test`` and export ``TEST_DATABASE_URL=postgresql+asyncpg://mcp:mcp@localhost:5433/mcp`` +to opt in). """ import tempfile @@ -23,15 +29,32 @@ def encryption_key(): @pytest.fixture -async def temp_storage(encryption_key): - """Create temporary storage instance with encryption for testing.""" - with tempfile.TemporaryDirectory() as tmpdir: - db_path = Path(tmpdir) / "test_app_passwords.db" +async def temp_storage(encryption_key, storage_backend): + """Create a storage instance backed by either SQLite or Postgres. + + The ``storage_backend`` fixture is parametrized by pytest, so every test + that uses ``temp_storage`` runs once per backend that is available in + the current environment. + """ + if storage_backend["kind"] == "sqlite": + with tempfile.TemporaryDirectory() as tmpdir: + db_path = Path(tmpdir) / "test_app_passwords.db" + storage = RefreshTokenStorage( + db_path=str(db_path), encryption_key=encryption_key + ) + await storage.initialize() + yield storage + else: storage = RefreshTokenStorage( - db_path=str(db_path), encryption_key=encryption_key + database_url=storage_backend["url"], encryption_key=encryption_key ) await storage.initialize() - yield storage + try: + yield storage + finally: + # Each test gets an isolated schema; tear it down so the next + # parametrized run starts clean. + await storage_backend["reset"]() async def test_store_app_password(temp_storage): diff --git a/tests/unit/test_ssl_config.py b/tests/unit/test_ssl_config.py index 0aca6f70..20f5016d 100644 --- a/tests/unit/test_ssl_config.py +++ b/tests/unit/test_ssl_config.py @@ -1,4 +1,16 @@ -"""Tests for SSL/TLS configuration (NEXTCLOUD_VERIFY_SSL, NEXTCLOUD_CA_BUNDLE).""" +"""Tests for SSL/TLS configuration. + +Covers two parallel patterns: + +- ``NEXTCLOUD_VERIFY_SSL`` / ``NEXTCLOUD_CA_BUNDLE`` for the httpx + client talking to Nextcloud. +- ``DATABASE_VERIFY_SSL`` / ``DATABASE_CA_BUNDLE`` for the asyncpg + driver talking to a centralized Postgres backend (ADR-026). + +The DB-side helper has a different default (``None`` instead of +``True``) because asyncpg's default ``prefer`` is the right back-compat +posture for cluster-internal Postgres — see ``get_database_ssl()``. +""" import logging import os @@ -12,6 +24,7 @@ import pytest from nextcloud_mcp_server.config import ( Settings, _reload_config, + get_database_ssl, get_nextcloud_ssl_verify, get_settings, ) @@ -185,3 +198,82 @@ class TestHTTPClientFactory: ): client = nextcloud_httpx_client(timeout=5.0, follow_redirects=True) assert isinstance(client, httpx.AsyncClient) + + +class TestDatabaseSSLSettings: + """Test DATABASE_VERIFY_SSL / DATABASE_CA_BUNDLE fields on Settings (ADR-026).""" + + def test_defaults(self): + """Default is None / None — preserves PR #798's asyncpg ``prefer``.""" + settings = Settings() + assert settings.database_verify_ssl is None + assert settings.database_ca_bundle is None + + def test_verify_false_logs_warning(self, caplog): + caplog.set_level(logging.WARNING, logger="nextcloud_mcp_server.config") + Settings(database_verify_ssl=False) + assert "DATABASE_VERIFY_SSL is disabled" in caplog.text + + def test_ca_bundle_nonexistent_path_raises(self): + with pytest.raises(ValueError, match="DATABASE_CA_BUNDLE path does not exist"): + Settings(database_ca_bundle="/nonexistent/path/ca.pem") + + def test_ca_bundle_existing_path_logs_info(self, caplog, tmp_path): + ca_file = tmp_path / "ca.pem" + ca_file.write_text( + "-----BEGIN CERTIFICATE-----\ntest\n-----END CERTIFICATE-----\n" + ) + caplog.set_level(logging.INFO, logger="nextcloud_mcp_server.config") + Settings(database_ca_bundle=str(ca_file)) + assert "custom CA bundle for Postgres backend" in caplog.text + + +class TestGetDatabaseSSL: + """Test the get_database_ssl() helper (ADR-026).""" + + def test_both_unset_returns_none(self): + """The asyncpg-default opt-out path — no `ssl` kwarg passed.""" + with patch( + "nextcloud_mcp_server.config.get_settings", + return_value=Settings(), + ): + assert get_database_ssl() is None + + def test_verify_true_returns_true(self): + with patch( + "nextcloud_mcp_server.config.get_settings", + return_value=Settings(database_verify_ssl=True), + ): + assert get_database_ssl() is True + + def test_verify_false_returns_false(self): + with patch( + "nextcloud_mcp_server.config.get_settings", + return_value=Settings(database_verify_ssl=False), + ): + assert get_database_ssl() is False + + def test_ca_bundle_returns_ssl_context(self): + ca_bundle = certifi.where() + with patch( + "nextcloud_mcp_server.config.get_settings", + return_value=Settings(database_ca_bundle=ca_bundle), + ): + result = get_database_ssl() + assert isinstance(result, ssl.SSLContext) + assert result.cert_store_stats()["x509_ca"] > 0 + + def test_verify_false_wins_over_ca_bundle(self, tmp_path): + """False is the explicit-opt-out and must override a stale bundle path.""" + ca_file = tmp_path / "ca.pem" + ca_file.write_text( + "-----BEGIN CERTIFICATE-----\ntest\n-----END CERTIFICATE-----\n" + ) + with patch( + "nextcloud_mcp_server.config.get_settings", + return_value=Settings( + database_verify_ssl=False, + database_ca_bundle=str(ca_file), + ), + ): + assert get_database_ssl() is False diff --git a/tests/unit/test_storage_logging.py b/tests/unit/test_storage_logging.py new file mode 100644 index 00000000..9b825941 --- /dev/null +++ b/tests/unit/test_storage_logging.py @@ -0,0 +1,85 @@ +"""Unit tests guarding against DB-credential leakage to logs (PR #798 round 2). + +The reviewer of PR #798 flagged that ``self.database_url`` was being logged +verbatim in ``RefreshTokenStorage.initialize()``, exposing any password +embedded in a Postgres URL to stdout/stderr and any log aggregator. These +tests pin the masking down so a future contributor can't silently +reintroduce the leak by adding a new ``logger.info("... %s", database_url)``. +""" + +from __future__ import annotations + +import logging + +import pytest + +from nextcloud_mcp_server.auth.storage import RefreshTokenStorage +from nextcloud_mcp_server.config import mask_db_password + +pytestmark = pytest.mark.unit + + +# Synthetic leak-detection sentinel — embedded into test-only URLs so we +# can grep ``caplog`` and prove the masking path never emits the literal +# password substring. Not a real credential. +SENTINEL_PASSWORD_FRAGMENT = "uniqueSecretSentinel123" # NOSONAR + + +def test_mask_db_password_postgres(): + """Postgres URL passwords are replaced with the SQLAlchemy ``***`` token.""" + url = ( + f"postgresql+asyncpg://mcp:{SENTINEL_PASSWORD_FRAGMENT}@db.example.com:5432/mcp" + ) + masked = mask_db_password(url) + assert SENTINEL_PASSWORD_FRAGMENT not in masked + assert "mcp" in masked # username preserved + assert "db.example.com" in masked # host preserved + + +def test_mask_db_password_sqlite_passthrough(): + """SQLite URLs have no credentials; the function must not corrupt them.""" + url = "sqlite+aiosqlite:////tmp/test-tokens.db" + masked = mask_db_password(url) + assert masked == url + + +def test_mask_db_password_handles_unparseable_url(): + """Malformed URLs fall back to a regex scrub instead of raising. + + A logging path that can raise is worse than a logging path that emits a + less-pretty masked value — never let credentials leak just because the + URL shape was unexpected. + """ + url = f"weird-scheme://user:{SENTINEL_PASSWORD_FRAGMENT}@host/db?ssl=disable" + masked = mask_db_password(url) + assert SENTINEL_PASSWORD_FRAGMENT not in masked + + +async def test_storage_init_does_not_log_password(caplog): + """Construct + initialize against a Postgres-shaped URL with a password + in the URL and confirm the secret is absent from every captured log.""" + # Use a sqlite URL with a fake password-shaped path — we don't need a + # real Postgres up to verify the masking logic, only that no log line + # ever interpolates the raw URL. A sqlite URL doesn't carry a password + # so we test masking by directly invoking the masked log path with a + # constructed Postgres URL via mask_db_password itself. + caplog.set_level(logging.DEBUG, logger="nextcloud_mcp_server.auth.storage") + caplog.set_level(logging.DEBUG, logger="nextcloud_mcp_server.migrations") + + import tempfile + from pathlib import Path + + with tempfile.TemporaryDirectory() as tmp: + db_path = Path(tmp) / "tokens.db" + storage = RefreshTokenStorage(db_path=str(db_path), encryption_key=None) + await storage.initialize() + + # Sanity: the sqlite path was logged at least once. + assert any("token storage" in rec.message.lower() for rec in caplog.records) + # The sentinel should never appear (sqlite URL has no password to leak, + # but if a future change reformatted DATABASE_URL into the message it + # would). Stay paranoid. + for rec in caplog.records: + assert SENTINEL_PASSWORD_FRAGMENT not in rec.getMessage(), ( + f"Credential sentinel leaked into log: {rec.getMessage()!r}" + ) diff --git a/tests/unit/test_webhook_storage.py b/tests/unit/test_webhook_storage.py index e07d485e..6bb62ed0 100644 --- a/tests/unit/test_webhook_storage.py +++ b/tests/unit/test_webhook_storage.py @@ -3,6 +3,9 @@ Unit tests for Webhook Storage functionality. Tests the webhook tracking methods in RefreshTokenStorage without requiring real database connections or network calls. + +Runs against both SQLite and Postgres backends — see the docstring on +``tests.fixtures.storage_backend`` for opt-in instructions. """ import tempfile @@ -17,14 +20,23 @@ pytestmark = pytest.mark.unit @pytest.fixture -async def temp_storage(): - """Create temporary storage instance for testing.""" - with tempfile.TemporaryDirectory() as tmpdir: - db_path = Path(tmpdir) / "test_webhooks.db" - # No encryption key needed for webhook tracking - storage = RefreshTokenStorage(db_path=str(db_path), encryption_key=None) +async def temp_storage(storage_backend): + """Create a storage instance backed by either SQLite or Postgres.""" + if storage_backend["kind"] == "sqlite": + with tempfile.TemporaryDirectory() as tmpdir: + db_path = Path(tmpdir) / "test_webhooks.db" + storage = RefreshTokenStorage(db_path=str(db_path), encryption_key=None) + await storage.initialize() + yield storage + else: + storage = RefreshTokenStorage( + database_url=storage_backend["url"], encryption_key=None + ) await storage.initialize() - yield storage + try: + yield storage + finally: + await storage_backend["reset"]() async def test_store_webhook(temp_storage): @@ -144,7 +156,7 @@ async def test_clear_preset_webhooks_nonexistent(temp_storage): async def test_webhook_timestamps(temp_storage): - """Test that webhook timestamps are properly stored.""" + """Test that webhook timestamps are properly stored as int epochs.""" start_time = time.time() await temp_storage.store_webhook(webhook_id=123, preset_id="notes_sync") end_time = time.time() @@ -152,8 +164,12 @@ async def test_webhook_timestamps(temp_storage): webhooks = await temp_storage.list_all_webhooks() assert len(webhooks) == 1 + # ``created_at`` is now an integer (PR #798 round 2 — consistency with + # other *_at columns). 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