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go语言实现http(s)代理

关键词: go

go语言实现http(s)代理

支持`http`和`https`代理，部署到国外服务器就可以自由上网了

```
package main

import (
    "bytes"
    "fmt"
    "log"
    "io"
    "net"
    "net/url"
    "strings"
)

func main() {
    l, _ := net.Listen("tcp", "0.0.0.0:8888")
    for {
        sourceConn, _ := l.Accept()
        go handle(sourceConn)
    }
}

func handle(sourceConn net.Conn) {
    defer sourceConn.Close()
    readTemp := make([]byte, 1024)
    n, _ := sourceConn.Read(readTemp)
    read := readTemp[0:n]
    log.Println("---------->")
    log.Println(string(read))
    log.Println("<----------")
    position := bytes.IndexByte(read, '\n')
    if position == -1 {
        return
    }
    firstLine := string(read[0:position])
    info := strings.Split(firstLine, " ")
    urlInfo, _ := url.Parse(info[1])
    var address string = ""
    if urlInfo.Opaque == "443" {
        address = urlInfo.Scheme + ":443"
    } else {
        if strings.Index(urlInfo.Host, ":") == -1 {
            address = urlInfo.Host + ":80"
        } else {
            address = urlInfo.Host
        }
    }
    destinationConn, errorMsg := net.Dial("tcp", address)
    if errorMsg != nil {
        return
    }
    if info[0] == "CONNECT" {
        fmt.Fprint(sourceConn, "HTTP/1.1 200 Connection established\r\n\r\n")
    } else {
        destinationConn.Write(read)
    }
    go io.Copy(destinationConn, sourceConn)
    io.Copy(sourceConn, destinationConn)
}
```

admin
2017-07-12 15:00:47
go

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go语言实现http(s)代理