mirror of
https://gitee.com/lauix/HFish
synced 2025-05-11 12:28:02 +08:00
54 lines
1.0 KiB
Go
54 lines
1.0 KiB
Go
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package httpx
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import (
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"fmt"
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"io"
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"net"
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"net/http"
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"strings"
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)
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/*http 正向代理*/
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type Pxy struct{}
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func (p *Pxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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fmt.Printf("Received request %s %s %s\n", req.Method, req.Host, req.RemoteAddr)
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transport := http.DefaultTransport
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// step 1
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outReq := new(http.Request)
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*outReq = *req // this only does shallow copies of maps
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if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
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if prior, ok := outReq.Header["X-Forwarded-For"]; ok {
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clientIP = strings.Join(prior, ", ") + ", " + clientIP
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}
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outReq.Header.Set("X-Forwarded-For", clientIP)
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}
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// step 2
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res, err := transport.RoundTrip(outReq)
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if err != nil {
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rw.WriteHeader(http.StatusBadGateway)
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return
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}
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// step 3
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for key, value := range res.Header {
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for _, v := range value {
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rw.Header().Add(key, v)
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}
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}
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rw.WriteHeader(res.StatusCode)
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io.Copy(rw, res.Body)
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res.Body.Close()
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}
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func Start(addr string) {
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http.Handle("/", &Pxy{})
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http.ListenAndServe(addr, nil)
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}
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