mirror of
https://github.com/syntrex-lab/gomcp.git
synced 2026-05-04 08:42:36 +02:00
84 lines
2.8 KiB
Go
84 lines
2.8 KiB
Go
// Copyright 2026 Syntrex Lab. All rights reserved.
|
|
// Use of this source code is governed by an Apache-2.0 license
|
|
// that can be found in the LICENSE file.
|
|
|
|
package httpserver
|
|
|
|
import (
|
|
"net/http"
|
|
)
|
|
|
|
// corsMiddleware adds CORS headers with strict origin validation.
|
|
// Production: SetCORSOrigins should be called with ["https://syntrex.pro"]
|
|
func corsMiddleware(origins []string) func(http.Handler) http.Handler {
|
|
allowAll := false
|
|
allowedSet := make(map[string]bool, len(origins))
|
|
for _, o := range origins {
|
|
if o == "*" {
|
|
allowAll = true
|
|
}
|
|
allowedSet[o] = true
|
|
}
|
|
|
|
return func(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
reqOrigin := r.Header.Get("Origin")
|
|
if reqOrigin != "" {
|
|
if !allowAll && !allowedSet[reqOrigin] {
|
|
http.Error(w, "CORS origin not allowed", http.StatusForbidden)
|
|
return
|
|
}
|
|
w.Header().Set("Access-Control-Allow-Origin", reqOrigin)
|
|
w.Header().Set("Vary", "Origin")
|
|
} else if allowAll {
|
|
w.Header().Set("Access-Control-Allow-Origin", "*")
|
|
}
|
|
|
|
w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS")
|
|
w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-API-Key")
|
|
w.Header().Set("Access-Control-Allow-Credentials", "true")
|
|
w.Header().Set("Access-Control-Max-Age", "86400")
|
|
|
|
// Handle preflight
|
|
if r.Method == http.MethodOptions {
|
|
w.WriteHeader(http.StatusNoContent)
|
|
return
|
|
}
|
|
|
|
next.ServeHTTP(w, r)
|
|
})
|
|
}
|
|
}
|
|
|
|
// securityHeadersMiddleware adds defense-in-depth headers to all responses.
|
|
// Mitigates XSS, clickjacking, MIME sniffing, and information leak vectors.
|
|
func securityHeadersMiddleware(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
// Prevent MIME type sniffing (IE/Chrome auto-exec attacks)
|
|
w.Header().Set("X-Content-Type-Options", "nosniff")
|
|
|
|
// Block iframe embedding (clickjacking defense)
|
|
w.Header().Set("X-Frame-Options", "DENY")
|
|
|
|
// XSS filter (legacy browsers)
|
|
w.Header().Set("X-XSS-Protection", "1; mode=block")
|
|
|
|
// Referrer leak prevention (no full URL in Referer header)
|
|
w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
|
|
|
|
// Content Security Policy — API only, no inline scripts
|
|
w.Header().Set("Content-Security-Policy", "default-src 'none'; frame-ancestors 'none'")
|
|
|
|
// Permissions Policy — deny all sensitive browser APIs
|
|
w.Header().Set("Permissions-Policy", "camera=(), microphone=(), geolocation=(), interest-cohort=()")
|
|
|
|
// Force HTTPS in production (1 year, include subdomains)
|
|
w.Header().Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
|
|
|
|
// Hide server identity
|
|
w.Header().Set("X-Powered-By", "")
|
|
w.Header().Del("Server")
|
|
|
|
next.ServeHTTP(w, r)
|
|
})
|
|
}
|