goproxy

Go HTTP(S)代理库, 支持中间人代理解密HTTPS

安装

go get github.com/ouqiang/goproxy

使用

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)
    }
}

代理测试

curl -x localhost:8080 https://www.baidu.com

中间人代理, 解密HTTPS

系统需导入根证书 mitm-proxy.crt ```go 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) } } ```

事件处理

实现Delegate接口

go
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)
}

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) } }