Created
February 19, 2019 09:50
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A proxy server support Http And Https
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package main | |
import ( | |
"fmt" | |
"io" | |
"log" | |
"net" | |
"net/url" | |
"strings" | |
) | |
/** | |
* 代理服务,启动一个代理服务,支持https和http服务. | |
* @author fukun 2019-02-19 | |
**/ | |
func main() { | |
fmt.Println("hello, proxy") | |
ln, err := net.Listen("tcp4", ":8080") | |
if err != nil { | |
log.Fatalln(err) | |
} | |
for { | |
conn, err := ln.Accept() | |
if err != nil { | |
log.Fatalln(err) | |
} | |
go handle(conn) | |
} | |
} | |
func handle(pconn net.Conn) { | |
var b [2048]byte | |
n, err := pconn.Read(b[:]) | |
defer pconn.Close() | |
fmt.Println(n, string(b[:])) | |
// getRemoteAddr | |
headerstrs := strings.Split(string(b[:]), "\r\n") | |
var method string | |
var turl string | |
var version string | |
n, err = fmt.Sscanf(headerstrs[0], "%s %s %s", &method, &turl, &version) | |
// fmt.Println(method, turl, version) | |
parseURL, err := url.Parse(turl) | |
fmt.Println(parseURL.Host, parseURL.Scheme, err) | |
var targetHost string | |
if method == "CONNECT" { | |
targetHost = turl | |
} else { | |
targetPort := "" | |
if parseURL.Port() == "" { | |
targetPort = "80" | |
} | |
targetHost = fmt.Sprintf("%s:%s", parseURL.Host, targetPort) | |
} | |
fmt.Println("dial remote addr: ", targetHost) | |
conn, err := net.Dial("tcp4", targetHost) | |
if method == "CONNECT" { | |
pconn.Write([]byte("HTTP/1.1 200 Connection established\r\n\r\n")) | |
} else { | |
conn.Write(b[:]) | |
} | |
if err != nil { | |
log.Fatalln(err) | |
} | |
stop := make(chan struct{}, 1) | |
go func() { | |
_, err := io.Copy(pconn, conn) | |
if err != nil { | |
log.Fatalln("copy pconn to conn", err) | |
} | |
stop <- struct{}{} | |
}() | |
go func() { | |
_, err := io.Copy(conn, pconn) | |
if err != nil { | |
log.Fatalln(err) | |
} | |
stop <- struct{}{} | |
}() | |
<-stop | |
<-stop | |
conn.Close() | |
} |
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