通过 Golang 学习 http 协议，如何用 Golang 实现 https 代理

Published at August 31, 2019 ·  1 min read

在 http.HandlerFunc 中检查 r.Method 为 Connect 后及将请求交给 handleTunneling，其中关键的是将 http.ResponseWriter 转换为 http.Hijacker 接管连接，并通过两个 goroutine transfer 复制请求。 func handleTunneling(w http.ResponseWriter, r *http.Request) { dst, err := net.DialTimeout("tcp", r.Host, 10*time.Second) if err != nil { http.Error(w, err.Error(), http.StatusServiceUnavailable) return } w.WriteHeader(http.StatusOK) hijacker, ok := w.(http.Hijacker) if !ok { http.Error(w, "Hijacking not supported", http.StatusInternalServerError) return } conn, _, err := hijacker.Hijack() if err != nil { http.Error(w, err.Error(), http.StatusServiceUnavailable) } go transfer(dst, conn) go transfer(conn, dst) } func transfer(dst io....