quadrant_server 2.5.0

A Dart-first, batteries-included HTTP server framework built on dart:io with zero external dependencies.

2.5.0

Security & Hardening

• Response.redirect() validation — Replaced assert with runtime ArgumentError validation so invalid status codes throw in release mode.
• bodyParser() error propagation — Narrowed body parser try-catch to on FormatException so low-level socket and connection errors are not swallowed. Added maxBodyBytes guard to defend against body-size DoS (returns 413 Payload Too Large).
• cors() preflight caching — Added maxAge parameter (defaults to 86,400s) emitting Access-Control-Max-Age header on OPTIONS preflights to prevent repeated OPTIONS round-trips.
• docs.dart CDN asset integrity — Added Subresource Integrity (SRI) hashes (integrity & crossorigin) to Swagger UI CDN scripts and stylesheets.
• Static files path traversal security — Path resolution in staticFiles() now normalizes paths with URI semantics to prevent directory traversal escapes (..).
• docsLocalOnly option wiring — Fixed constructor parameter passthrough in QuadrantServer so docsLocalOnly: false is honored when intentionally deployed behind a proxy.

Added

• helmet() middleware — Injects 8 essential HTTP security headers (X-Content-Type-Options, X-Frame-Options, Referrer-Policy, etc.).
• requestId() middleware — Generates and forwards X-Request-ID (UUID v4) for distributed request tracing, exposed in req.context['requestId'].
• rateLimit() middleware — Token-bucket sliding-window rate limiting per client IP or custom key with X-RateLimit-* and Retry-After headers.
• bearerAuth() middleware — Extracts bearer token, validates against async callback, and injects principal into req.context['user'].
• ipFilter() middleware — Allow-list or deny-list client IP addresses supporting exact match and IPv4/IPv6 CIDR ranges.
• cookieParser() middleware & Response cookie helpers — Parses Cookie header into req.context['cookies']; added Response.withCookie() and Response.clearCookie() with Set-Cookie generation.
• formParser() middleware — Decodes application/x-www-form-urlencoded payloads into req.body with configurable byte limits.
• multipartParser() middleware — Handles multipart file uploads and form fields, exposing typed UploadedFile instances in req.context['files'].
• compress() middleware — Response gzip compression using dart:io GZipCodec with Accept-Encoding negotiation.
• etag() middleware — Generates weak ETags and handles If-None-Match conditional requests returning 304 Not Modified.
• SseContext — Push-based Server-Sent Events (SSE) compatible with browser EventSource and automatic keep-alive comment pings.
• StreamResponse — Response subclass for streaming raw bytes directly to client sockets without memory buffering.
• Request validation DSL — BodySchema and Field (string, int_, double_, bool_, list) with validate() middleware returning 422 Unprocessable Entity.
• listenSecure() — First-class HTTPS/TLS binding with certificateChain and privateKey files.
• Health check endpoint — Optional built-in /health reporting uptime, request counts, and RSS memory usage.
• WebSocket heartbeats — Configurable heartbeat duration on WebSocketRoute for automatic ping/pong keepalive.
• Graceful in-flight request draining — app.close() drains active requests before terminating.

Fixed

• WebSocket upgrade error handling — Upgrades failing in onError now return an HTTP error response to the client rather than leaving the connection hanging.
• WebSocket middleware chain sentinel — Replaced dummy 200 response with Response(204) sentinel.
• Connection close resilience — Guarded _writeResponse against writing to already-closed HTTP sockets.
• Banner ASCII padding — Handled high route counts safely with max(0, ...).

2.0.0

Added

• QuadrantRouter — prefix-mounted route grouping; organise large apps without repeating path prefixes. Supports router-level middlewares applied to all routes in the group.
• WebSocketGroup — built-in broadcast/room utility. add(), remove(), broadcast(), broadcastJson(), closeAll() with lazy cleanup of stale connections.
• WebSocketContext.isOpen / isClosed — check connection state before sending to avoid throwing on a closed socket.
• WebSocketContext.sendJson() — convenience JSON-encode-and-send shortcut.
• Wildcard route segments — Route.get(path: '/files/*', ...) captures the full remaining path as req.params['*'].
• Response.redirect() — 301/302/307/308 redirect with location header.
• Response.text() — plain-text response with content-type: text/plain.
• Response.html() — HTML response with content-type: text/html.
• Response.conflict() — 409 Conflict.
• Response.unprocessableEntity() — 422 Unprocessable Entity.
• Typed query helpers on Request — queryString(), queryInt(), queryDouble(), queryBool() with default value support.
• Request.bodyAsMap / bodyAsList — safe typed casts for the parsed body.
• app.close() — graceful shutdown that waits for in-flight requests.
• docsLocalOnly parameter — control whether /quadrant_docs is loopback-only (default: true).
• logger() output sink — injectable log destination: logger(output: myLogger.info).
• cors() named parameters — methods and allowedHeaders now configurable.
• Startup banner — printed when docs: true showing host, route counts, and docs URL.
• Unit test suite (test/quadrant_server_test.dart) covering router, response factories, QuadrantRouter, and middleware.
• analysis_options.yaml with lints/recommended and strict type-checking.

Fixed

• RequestHolder hash collision — replaced hashCode-based Map key with Expando<Object> keyed on the HttpRequest object itself. Eliminates body cross-contamination under concurrent load.
• bodyParser silently dropped JSON array bodies — req.body is now dynamic and accepts top-level List payloads.
• Plain-string responses lacked Content-Type — all string response bodies now carry content-type: text/plain; charset=utf-8.
• WebSocket upgrade errors silently swallowed — upgrade failures now delegate to onError or print a warning.
• /quadrant_docs accessible from external IPs — loopback guard is now active by default (docsLocalOnly: true).
• internalServerError leaked raw exception messages — default error handler now returns a generic safe message; users opt in to detail via onError.

Improved

• cors() now sets Vary: Origin when origin != '*' for correct CDN/proxy caching behaviour.
• WebSocketContext.send() is now a no-op when the socket is closed instead of throwing.

1.2.0

Added

• WebSocket support — declarative WebSocketRoute with four named callbacks (onStart, onMessage, onClose, onError)
• WebSocketContext — per-connection context with send(), close(), and access to the original upgrade request (params, query, headers)
• webSocketRoutes parameter on QuadrantServer — declare WS endpoints alongside HTTP routes
• Middleware support for WebSocket — route-level middlewares run before upgrade; rejection prevents the upgrade entirely
• Path parameters on WS routes — /ws/chat/:roomId extracts params just like HTTP routes
• MatchedWebSocket sealed type — router distinguishes WS upgrades from HTTP requests at the type level
• Docs: WebSocket section — /quadrant_docs now renders WS endpoints in a table below Swagger UI

Improved

• Router — match() accepts isUpgradeRequest flag; WS upgrades never fall through to HTTP GET routes

1.1.1

Added

• /quadrant_docs endpoint — opt-in interactive API explorer powered by Swagger UI (CDN-loaded), enabled via docs: true
• 405 Method Not Allowed — router now distinguishes "path exists, wrong method" from "path not found", returns proper Allow header
• HEAD request support — HEAD automatically falls back to GET handlers per HTTP spec
• Trailing slash normalization — /users/ and /users now match the same route
• URI-decoded path params — %20 and other encoded characters decoded automatically
• Route.paramNames getter — extracts parameter names from path pattern for introspection

Improved

• Router performance — routes grouped by HTTP method for faster lookup (O(n/m) vs O(n))
• Method normalization — 'get' and 'GET' both resolve correctly

Security

• /quadrant_docs locked to loopback addresses only — external IPs always get 404
• Docs route excluded from generated OpenAPI spec (no self-referencing)

1.0.0

• Initial release
• Core framework: QuadrantServer, Request, Response, Route, Router
• Middleware system with global and route-level support
• Built-in middlewares: cors(), logger(), bodyParser()
• Path parameter extraction (:param segments)
• Immutable response pattern with static constructors
• Zero external dependencies — built entirely on dart:io