- 直接上代码
package main
import (
"bytes"
"fmt"
"io"
"log"
"net"
"net/url"
"strings"
)
func main() {
con, err := net.Listen("tcp", ":8080")
if err != nil {
log.Panic(err)
}
for {
client, err := con.Accept()
if err != nil {
log.Panic(err)
}
go handleClientRequest(client)
}
}
func handleClientRequest(client net.Conn) {
var b [1024]byte
n, err := client.Read(b[:])
if err != nil {
log.Panic("error:", err)
}
fmt.Println(string(b[:]))
var method, host, address string
fmt.Sscanf(string(b[:bytes.IndexByte(b[:], '\n')]), "%s%s", &method, &host)
hostPortURL, err := url.Parse(host)
if err != nil {
log.Println(err)
return
}
if hostPortURL.Opaque == "443" { //https访问
address = hostPortURL.Scheme + ":443"
} else { //http访问
if strings.Index(hostPortURL.Host, ":") == -1 { //host不带端口， 默认80
address = hostPortURL.Host + ":80"
} else {
address = hostPortURL.Host
}
}
fmt.Println("method:", method, "host:", host, "address:", address)
server, err := net.Dial("tcp", address)
if err != nil {
log.Println(err)
return
}
if method == "CONNECT" {
fmt.Fprint(client, "HTTP/1.1 200 Connection established\r\n\r\n")
} else {
server.Write(b[:n])
}
//进行转发
go io.Copy(server, client)
io.Copy(client, server)
}
编译后直接丢到某国服务器上本地代理服务器ip和端口即可，这里是
8080
