├── README.md
├── .gitignore
├── LICENSE
└── valuga.go


/README.md:
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1 | # valuga
2 | A tool convert SOCKS5 proxy into HTTP proxy
3 | 


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/.gitignore:
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 1 | # Binaries for programs and plugins
 2 | *.exe
 3 | *.dll
 4 | *.so
 5 | *.dylib
 6 | 
 7 | # Test binary, build with `go test -c`
 8 | *.test
 9 | 
10 | # Output of the go coverage tool, specifically when used with LiteIDE
11 | *.out
12 | 
13 | # Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
14 | .glide/
15 | 


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/LICENSE:
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 1 | MIT License
 2 | 
 3 | Copyright (c) 2018 mo2zie
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/valuga.go:
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 1 | package main
 2 | 
 3 | import (
 4 | 	"io"
 5 | 	"net"
 6 | 	"net/http"
 7 | 	"time"
 8 | 
 9 | 	"golang.org/x/net/proxy"
10 | )
11 | 
12 | func handleHTTP(w http.ResponseWriter, req *http.Request, dialer proxy.Dialer) {
13 | 	tp := http.Transport{
14 | 		Dial: dialer.Dial,
15 | 	}
16 | 	resp, err := tp.RoundTrip(req)
17 | 	if err != nil {
18 | 		http.Error(w, err.Error(), http.StatusServiceUnavailable)
19 | 		return
20 | 	}
21 | 	defer resp.Body.Close()
22 | 	copyHeader(w.Header(), resp.Header)
23 | 	w.WriteHeader(resp.StatusCode)
24 | 	io.Copy(w, resp.Body)
25 | }
26 | 
27 | func copyHeader(dst, src http.Header) {
28 | 	for k, vv := range src {
29 | 		for _, v := range vv {
30 | 			dst.Add(k, v)
31 | 		}
32 | 	}
33 | }
34 | 
35 | func handleTunnel(w http.ResponseWriter, req *http.Request, dialer proxy.Dialer) {
36 | 	hijacker, ok := w.(http.Hijacker)
37 | 	if !ok {
38 | 		http.Error(w, "Hijacking not supported", http.StatusInternalServerError)
39 | 		return
40 | 	}
41 | 	srcConn, _, err := hijacker.Hijack()
42 | 	if err != nil {
43 | 		http.Error(w, err.Error(), http.StatusServiceUnavailable)
44 | 		return
45 | 	}
46 | 	dstConn, err := dialer.Dial("tcp", req.Host)
47 | 	if err != nil {
48 | 		srcConn.Close()
49 | 		return
50 | 	}
51 | 
52 | 	srcConn.Write([]byte("HTTP/1.1 200 Connection Established\r\n\r\n"))
53 | 
54 | 	go transfer(dstConn, srcConn)
55 | 	go transfer(srcConn, dstConn)
56 | }
57 | 
58 | func transfer(dst io.WriteCloser, src io.ReadCloser) {
59 | 	defer dst.Close()
60 | 	defer src.Close()
61 | 
62 | 	io.Copy(dst, src)
63 | }
64 | 
65 | func serveHTTP(w http.ResponseWriter, req *http.Request) {
66 | 	d := &net.Dialer{
67 | 		Timeout: 10 * time.Second,
68 | 	}
69 | 	dialer, _ := proxy.SOCKS5("tcp", "127.0.0.1:1080", nil, d)
70 | 
71 | 	if req.Method == "CONNECT" {
72 | 		handleTunnel(w, req, dialer)
73 | 	} else {
74 | 		handleHTTP(w, req, dialer)
75 | 	}
76 | }
77 | 
78 | func main() {
79 | 	http.ListenAndServe("127.0.0.1:8124", http.HandlerFunc(serveHTTP))
80 | }
81 | 


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