goproxy
安装
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go get github.com/ouqiang/goproxy
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使用
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package main
import (
"net/http"
"time"
"github.com/ouqiang/goproxy"
)
func main() {
proxy := goproxy.New()
server := &http.Server{
Addr: ":8080",
Handler: proxy,
ReadTimeout: 1 * time.Minute,
WriteTimeout: 1 * time.Minute,
}
err := server.ListenAndServe()
if err != nil {
panic(err)
}
}
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代理测试
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curl -x localhost:8080 https://www.baidu.com
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中间人代理, 解密HTTPS
系统需导入根证书 mitm-proxy.crt
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package main
import (
"crypto/tls"
"net/http"
"sync"
"time"
"github.com/ouqiang/goproxy"
)
// 实现证书缓存接口
type Cache struct {
m sync.Map
}
func (c *Cache) Set(host string, cert *tls.Certificate) {
c.m.Store(host, cert)
}
func (c *Cache) Get(host string) *tls.Certificate {
v, ok := c.m.Load(host)
if !ok {
return nil
}
return v.(*tls.Certificate)
}
func main() {
proxy := goproxy.New(goproxy.WithDecryptHTTPS(&Cache{}))
server := &http.Server{
Addr: ":8080",
Handler: proxy,
ReadTimeout: 1 * time.Minute,
WriteTimeout: 1 * time.Minute,
}
err := server.ListenAndServe()
if err != nil {
panic(err)
}
}
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事件处理
实现Delegate接口
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type Delegate interface {
// Connect 收到客户端连接
Connect(ctx *Context, rw http.ResponseWriter)
// Auth 代理身份认证
Auth(ctx *Context, rw http.ResponseWriter)
// BeforeRequest HTTP请求前 设置X-Forwarded-For, 修改Header、Body
BeforeRequest(ctx *Context)
// BeforeResponse 响应发送到客户端前, 修改Header、Body、Status Code
BeforeResponse(ctx *Context, resp *http.Response, err error)
// ParentProxy 上级代理
ParentProxy(*http.Request) (*url.URL, error)
// Finish 本次请求结束
Finish(ctx *Context)
// 记录错误信息
ErrorLog(err error)
}
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type EventHandler struct{}
func (e *EventHandler) Connect(ctx *goproxy.Context, rw http.ResponseWriter) {
// 保存的数据可以在后面的回调方法中获取
ctx.Data["req_id"] = "uuid"
// 禁止访问某个域名
if strings.Contains(ctx.Req.URL.Host, "example.com") {
rw.WriteHeader(http.StatusForbidden)
ctx.Abort()
return
}
}
func (e *EventHandler) Auth(ctx *goproxy.Context, rw http.ResponseWriter) {
// 身份验证
}
func (e *EventHandler) BeforeRequest(ctx *goproxy.Context) {
// 修改header
ctx.Req.Header.Add("X-Request-Id", ctx.Data["req_id"].(string))
// 设置X-Forwarded-For
if clientIP, _, err := net.SplitHostPort(ctx.Req.RemoteAddr); err == nil {
if prior, ok := ctx.Req.Header["X-Forwarded-For"]; ok {
clientIP = strings.Join(prior, ", ") + ", " + clientIP
}
ctx.Req.Header.Set("X-Forwarded-For", clientIP)
}
// 读取Body
body, err := ioutil.ReadAll(ctx.Req.Body)
if err != nil {
// 错误处理
return
}
// Request.Body只能读取一次, 读取后必须再放回去
// Response.Body同理
ctx.Req.Body = ioutil.NopCloser(bytes.NewReader(body))
}
func (e *EventHandler) BeforeResponse(ctx *goproxy.Context, resp *http.Response, err error) {
if err != nil {
return
}
// 修改response
}
// 设置上级代理
func (e *EventHandler) ParentProxy(req *http.Request) (*url.URL, error) {
return url.Parse("http://localhost:1087")
}
func (e *EventHandler) Finish(ctx *goproxy.Context) {
fmt.Printf("请求结束 URL:%s\n", ctx.Req.URL)
}
// 记录错误日志
func (e *EventHandler) ErrorLog(err error) {
log.Println(err)
}
func main() {
proxy := goproxy.New(goproxy.WithDelegate(&EventHandler{}))
server := &http.Server{
Addr: ":8080",
Handler: proxy,
ReadTimeout: 1 * time.Minute,
WriteTimeout: 1 * time.Minute,
}
err := server.ListenAndServe()
if err != nil {
panic(err)
}
}
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以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。如有错误或未考虑完全的地方,望不吝赐教。
原文链接:https://blog.csdn.net/order_c/article/details/81839273