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https://github.com/azaion/satellite-provider.git
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Oleksandr Bezdieniezhnykh
9cfd80babe
AZ-495 (1 SP): formalize the modules-only documentation convention for the WebApi component. _docs/02_document/module-layout.md now carries an explicit Documentation Layout section anchoring WebApi docs at modules/api_program.md; the components/06_web_api/ folder is intentionally absent. .cursor/skills/new-task/SKILL.md Step 4 directs future agents at the correct path. Cycle-1 + cycle-2 F1 findings in the two batch-review files are marked RESOLVED with back-reference to AZ-495. Cycle-2 retrospective decision-item list F1 updated. AZ-496 (2 SP): bump Microsoft.AspNetCore.OpenApi and JwtBearer in SatelliteProvider.Api.csproj from 8.0.21 to 8.0.25, closing CVE- 2026-26130 (SignalR DoS - not reachable in this app, but the runtime patch is the recommended hardening per cycle-1 D1 + cycle-2 D3). SatelliteProvider.Tests.csproj has no direct JwtBearer reference - it consumes JwtBearer transitively via ProjectReference to Api, so no edit needed there. Dockerfiles use floating mcr.microsoft.com/ dotnet/aspnet:8.0 / sdk:8.0 / runtime:8.0 tags which auto-resolve to >= 8.0.25 on rebuild. Security artifacts (dependency_scan.md, security_report.md) and current-state docs (module-layout.md, architecture.md, modules/api_program.md, modules/tests_unit.md) updated to reflect 8.0.25. Batch report + code review report (verdict PASS_WITH_WARNINGS with 2 Low findings, neither blocking) written under _docs/03_implementation. Test suite gate deferred to Step 16 (Final Test Run) per implement skill convention. Patch-level bump within .NET 8 LTS; regression risk very low. Co-authored-by: Cursor <cursoragent@cursor.com>
104 lines
7.3 KiB
Markdown
104 lines
7.3 KiB
Markdown
# Module: Api/Program.cs
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## Purpose
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Application entry point. Configures DI container, sets up middleware, defines minimal API endpoints, runs database migrations on startup, and starts background services.
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## Public Interface
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### API Endpoints
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| Method | Route | Handler | Description |
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|--------|-------|---------|-------------|
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| GET | `/tiles/{z}/{x}/{y}` | `ServeTile` | Slippy map tile server with in-memory caching |
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| GET | `/api/satellite/tiles/latlon` | `GetTileByLatLon` | Download single tile by lat/lon/zoom |
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| GET | `/api/satellite/tiles/mgrs` | `GetSatelliteTilesByMgrs` | MGRS stub (returns empty) |
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| POST | `/api/satellite/upload` | `UploadUavTileBatch` | UAV tile batch upload (AZ-488) — multipart envelope, 5-rule quality gate, per-source UPSERT with `source='uav'`. Requires the `RequiresGpsPermission` policy. |
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| POST | `/api/satellite/request` | `RequestRegion` | Queue region for async tile processing |
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| GET | `/api/satellite/region/{id}` | `GetRegionStatus` | Get region processing status |
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| POST | `/api/satellite/route` | `CreateRoute` | Create route with intermediate points |
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| GET | `/api/satellite/route/{id}` | `GetRoute` | Get route with all points |
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### Local Records (defined in Program.cs)
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- `GetSatelliteTilesResponse`, `SatelliteTile` — MGRS response stubs
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- `DownloadTileResponse` — tile download response
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- `RequestRegionRequest` — region request body
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- `ParameterDescriptionFilter` — Swagger operation filter
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### Api/DTOs (AZ-488)
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- `UavTileBatchUploadRequest` — multipart envelope with `metadata` (JSON string) and `files` (`IFormFileCollection`)
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### Common/DTO (AZ-488)
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- `UavTileMetadata`, `UavTileBatchMetadataPayload` — per-item metadata + envelope shape
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- `UavTileBatchUploadResponse`, `UavTileUploadResultItem` — per-item response shape
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- `UavTileUploadStatus`, `UavTileRejectReasons` — string-constant enumerations exposed in the v1.0.0 contract
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## Internal Logic
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### DI Registration
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1. Serilog configured from `appsettings.json`
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2. Connection string extracted from `ConnectionStrings:DefaultConnection`
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3. Config bindings: `MapConfig`, `StorageConfig`, `ProcessingConfig`, `UavQualityConfig` (AZ-488)
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4. **Request size limits (AZ-488)**: `KestrelServerOptions.Limits.MaxRequestBodySize` and `FormOptions.MultipartBodyLengthLimit` are set to `UavQualityConfig.MaxBatchSize × UavQualityConfig.MaxBytes` (default 100 × 5 MiB = 500 MiB) so an oversized UAV batch is rejected at the framework layer before reaching the handler.
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5. Singletons: repositories (`TileRepository`, `RegionRepository`, `RouteRepository`), `GoogleMapsDownloaderV2`, `ITileService`, `IRegionService`, `IRouteService`, `IUavTileQualityGate`, `IUavTileUploadHandler` (AZ-488)
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6. `IRegionRequestQueue` with configurable capacity
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7. Hosted services: `RegionProcessingService`, `RouteProcessingService`
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8. CORS policy: `TilesCors` — configured origins from `CorsConfig:AllowedOrigins`, falls back to allow-any
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9. JSON options: camelCase, case-insensitive
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10. **JWT authentication (AZ-487)**: `AddSatelliteJwt(builder.Configuration)` (extension in `SatelliteProvider.Api.Authentication`) registers `JwtBearer` with `TokenValidationParameters` set per the suite auth contract (signature + lifetime, no issuer/audience validation, 30 s clock skew, ≥ 32-byte HMAC key). Followed by `AddAuthorization` with the `RequiresGpsPermission` policy (AZ-488). The `PermissionsAuthorizationHandler` singleton supports both repeated-string and JSON-array shapes for the `permissions` claim.
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### Startup
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1. Database migration via `DatabaseMigrator.RunMigrations()` — throws on failure
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2. Creates tiles and ready directories
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3. Swagger enabled in Development mode
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4. Middleware chain (order matters): `UseExceptionHandler` → `UseHttpsRedirection` → `UseCors("TilesCors")` → `UseAuthentication` → `UseAuthorization` → endpoint mapping.
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5. Every `MapGet`/`MapPost` endpoint is decorated with `.RequireAuthorization()`; the framework returns 401 before the handler runs for any anonymous, expired, or invalid-signature request.
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### ServeTile Handler
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1. Checks `IMemoryCache` for tile bytes (1h absolute, 30min sliding expiration)
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2. If cache miss: queries `ITileRepository.GetByTileCoordinatesAsync`
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3. If no DB record: downloads tile via `GoogleMapsDownloaderV2.DownloadSingleTileAsync`, creates `TileEntity`, inserts
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4. Returns image bytes with cache headers (`Cache-Control: public, max-age=86400`)
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### GetTileByLatLon Handler
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Downloads a tile, persists it, returns metadata as `DownloadTileResponse`.
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### RequestRegion Handler
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Validates size (100–10000m), delegates to `IRegionService.RequestRegionAsync`.
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### UploadUavTileBatch Handler (AZ-488)
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Buffers each `IFormFile` into memory, packages them as `UavUploadFile` records (filename, content-type, bytes), and delegates to `IUavTileUploadHandler.HandleAsync`. Envelope-level errors (mismatched batch, oversized batch, malformed metadata) are surfaced as HTTP 400 ProblemDetails; per-item rejects are returned in the HTTP 200 response payload. The endpoint is protected by `.RequireAuthorization(SatellitePermissions.UavUploadPolicy)` so 401 (no token) and 403 (no `GPS` permission) are returned before the handler runs.
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## Dependencies
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All project references: Common, DataAccess, Services.
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NuGet: `Serilog.AspNetCore`, `Swashbuckle.AspNetCore`, `Microsoft.AspNetCore.OpenApi` (8.0.25, bumped from 8.0.21 by AZ-496), `Microsoft.AspNetCore.Authentication.JwtBearer` (8.0.25, added at 8.0.21 by AZ-487, bumped by AZ-496), `SixLabors.ImageSharp`, `Newtonsoft.Json`.
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## Consumers
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- HTTP clients (external)
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- Integration tests (via HTTP)
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## Data Models
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Defines several local request/response records that are not shared with other projects.
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## Configuration
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All configuration sections are consumed here:
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- `ConnectionStrings:DefaultConnection`
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- `MapConfig`, `StorageConfig`, `ProcessingConfig`
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- `UavQuality` (AZ-488) — `MinBytes`, `MaxBytes`, `MaxAgeDays`, `CapturedAtFutureSkewSeconds`, `MinLuminanceVariance`, `MaxBatchSize`, `LuminanceSampleSize`. Drives the 5-rule quality gate AND the per-request body-size limits.
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- `CorsConfig:AllowedOrigins`
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- `Jwt:Secret` — HMAC-SHA256 signing key for JWT validation (AZ-487). Resolution: `JWT_SECRET` env var (preferred, opaque production secret) → `Jwt:Secret` configuration key (`appsettings.Development.json` placeholder only). Startup fails fast if the resolved value is unset, empty, or shorter than 32 bytes.
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- `Serilog` section
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## External Integrations
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- Google Maps (indirectly via `GoogleMapsDownloaderV2`)
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- PostgreSQL (via repositories and DatabaseMigrator)
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- File system (`./tiles/`, `./ready/`)
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## Security
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- CORS configured (permissive by default when no origins specified)
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- Swagger only in Development; Bearer token "Authorize" button registered via `AddSecurityDefinition`/`AddSecurityRequirement` (AZ-487)
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- HTTPS redirection enabled
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- JWT bearer authentication (AZ-487) — every endpoint requires a valid HS256-signed token. Anonymous, expired, or signature-tampered requests return 401 before the handler runs.
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- Permission-claim policies (AZ-488) — `POST /api/satellite/upload` is wrapped in `.RequireAuthorization(SatellitePermissions.UavUploadPolicy)`. The `PermissionsAuthorizationHandler` reads the `permissions` claim (repeated-string OR JSON-array shape) and returns 403 if `GPS` is not present.
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## Tests
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Integration tests exercise all endpoints. Unit test project has only a dummy test.
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