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Copy pathproxy.go
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Copy pathproxy.go
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79 lines (66 loc) · 1.74 KB
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package handler
import (
"fmt"
"net"
"github.com/nginxgo/nginxgo/pkg/http"
)
// ProxyHandler 反向代理处理器
type ProxyHandler struct {
Target string // 上游服务器地址
}
// NewProxyHandler 创建反向代理处理器
func NewProxyHandler(target string) *ProxyHandler {
return &ProxyHandler{
Target: target,
}
}
// ServeHTTP 处理代理请求
func (h *ProxyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// 连接到上游服务器
conn, err := net.Dial("tcp", h.Target)
if err != nil {
w.SetStatus(502)
w.WriteString("Bad Gateway")
return
}
defer conn.Close()
// 构建请求行
requestLine := fmt.Sprintf("%s %s %s\r\n", r.Method, r.URI, r.Proto)
// 构建请求头
var headers string
for k, v := range r.Headers {
headers += fmt.Sprintf("%s: %s\r\n", k, v)
}
// 添加代理头
headers += fmt.Sprintf("X-Real-IP: %s\r\n", r.RemoteAddr)
headers += fmt.Sprintf("X-Forwarded-For: %s\r\n", r.RemoteAddr)
// 发送请求
req := requestLine + headers + "\r\n"
conn.Write([]byte(req))
// 读取响应
buf := make([]byte, 8192)
n, err := conn.Read(buf)
if err != nil {
w.SetStatus(502)
w.WriteString("Bad Gateway")
return
}
// 解析响应并发送
w.Write(buf[:n])
}
// ProxyPassReverseHandler 反向代理处理器 (基于配置的)
type ProxyPassReverseHandler struct {
Upstream string
}
// NewProxyPassReverseHandler 创建反向代理处理器
func NewProxyPassReverseHandler(upstream string) *ProxyPassReverseHandler {
return &ProxyPassReverseHandler{
Upstream: upstream,
}
}
func (h *ProxyPassReverseHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// 简单实现：直接转发
// 实际应该使用 http.Client
w.SetStatus(502)
w.WriteString("Proxy not implemented")
}