Mikkel Georgsen
16caa12d64
- Embedded NATS server with JetStream (sync_interval=always per Jepsen 2025) - AUDIT and STATE JetStream streams for tournament event durability - NATS publisher with UUID validation to prevent subject injection - WebSocket hub with JWT auth (query param), tournament-scoped broadcasting - Origin validation and slow-consumer message dropping - chi HTTP router with middleware (logger, recoverer, request ID, CORS, body limits) - Server timeouts: ReadHeader 10s, Read 30s, Write 60s, Idle 120s, MaxHeader 1MB - MaxBytesReader middleware for request body limits (1MB default) - JWT auth middleware with HMAC-SHA256 validation - Role-based access control (admin > floor > viewer) - Health endpoint reporting all subsystem status (DB, NATS, WebSocket) - SvelteKit SPA served via go:embed with fallback routing - Signal-driven graceful shutdown in reverse startup order - 9 integration tests covering all verification criteria Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
96 lines
2.8 KiB
Go
96 lines
2.8 KiB
Go
// Package middleware provides HTTP middleware for the Felt tournament engine.
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package middleware
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import (
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"context"
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"net/http"
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"strings"
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"github.com/golang-jwt/jwt/v5"
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)
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// contextKey is a private type for context keys to avoid collisions.
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type contextKey string
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const (
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// OperatorIDKey is the context key for the authenticated operator ID.
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OperatorIDKey contextKey = "operator_id"
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// OperatorRoleKey is the context key for the authenticated operator role.
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OperatorRoleKey contextKey = "operator_role"
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)
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// JWTAuth returns middleware that validates JWT tokens from the Authorization header.
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// Tokens must be in the format: Bearer <token>
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func JWTAuth(signingKey []byte) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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authHeader := r.Header.Get("Authorization")
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if authHeader == "" {
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http.Error(w, `{"error":"missing authorization header"}`, http.StatusUnauthorized)
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return
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}
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parts := strings.SplitN(authHeader, " ", 2)
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if len(parts) != 2 || !strings.EqualFold(parts[0], "bearer") {
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http.Error(w, `{"error":"invalid authorization format"}`, http.StatusUnauthorized)
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return
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}
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tokenStr := parts[1]
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operatorID, role, err := ValidateJWT(tokenStr, signingKey)
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if err != nil {
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http.Error(w, `{"error":"invalid or expired token"}`, http.StatusUnauthorized)
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return
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}
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// Add operator info to request context
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ctx := context.WithValue(r.Context(), OperatorIDKey, operatorID)
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ctx = context.WithValue(ctx, OperatorRoleKey, role)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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// ValidateJWT parses and validates a JWT token string, returning the
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// operator ID and role from claims.
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func ValidateJWT(tokenStr string, signingKey []byte) (operatorID string, role string, err error) {
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token, err := jwt.Parse(tokenStr, func(token *jwt.Token) (interface{}, error) {
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// Verify signing method is HMAC
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, jwt.ErrSignatureInvalid
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}
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return signingKey, nil
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})
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if err != nil {
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return "", "", err
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}
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claims, ok := token.Claims.(jwt.MapClaims)
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if !ok || !token.Valid {
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return "", "", jwt.ErrSignatureInvalid
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}
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operatorID, _ = claims["sub"].(string)
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role, _ = claims["role"].(string)
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if operatorID == "" {
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return "", "", jwt.ErrSignatureInvalid
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}
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if role == "" {
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role = "viewer" // Default role
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}
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return operatorID, role, nil
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}
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// OperatorID extracts the operator ID from the request context.
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func OperatorID(r *http.Request) string {
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id, _ := r.Context().Value(OperatorIDKey).(string)
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return id
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}
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// OperatorRole extracts the operator role from the request context.
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func OperatorRole(r *http.Request) string {
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role, _ := r.Context().Value(OperatorRoleKey).(string)
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return role
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}
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