Middleware لـ CORS واستعادة ما بعد panic

func CORS(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.Header().Set("Access-Control-Allow-Origin", "https://myapp.com")
        w.Header().Set("Access-Control-Allow-Methods", "GET,POST,PUT,DELETE,OPTIONS")
        w.Header().Set("Access-Control-Allow-Headers", "Authorization,Content-Type")
        if r.Method == http.MethodOptions {
            w.WriteHeader(http.StatusOK); return
        }
        next.ServeHTTP(w, r)
    })
}

allowedOrigins := map[string]bool{
    "https://app.example.com": true,
    "https://dev.example.com": true,
}

if allowedOrigins[r.Header.Get("Origin")] {
    w.Header().Set("Access-Control-Allow-Origin", r.Header.Get("Origin"))
}

w.Header().Set("Access-Control-Allow-Credentials", "true")

c := cors.New(cors.Options{
    AllowedOrigins: []string{"https://example.com"},
    AllowedMethods: []string{"GET","POST","PUT","DELETE"},
    AllowedHeaders: []string{"Authorization","Content-Type"},
    AllowCredentials: true,
})
handler := c.Handler(mux)

func Recovery(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        defer func() {
            if rec := recover(); rec != nil {
                log.Printf("panic: %v\n%s", rec, debug.Stack())
                http.Error(w, "Internal Server Error", 500)
            }
        }()
        next.ServeHTTP(w, r)
    })
}

import "runtime/debug"
log.Printf("panic: %v\n%s", rec, debug.Stack())

handler := Recovery(RequestID(Logger(Auth(mux))))

panicHandler := http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) { panic("test") })
w := httptest.NewRecorder()
Recovery(panicHandler).ServeHTTP(w, httptest.NewRequest("GET", "/", nil))
assert.Equal(t, 500, w.Code)