代码语言：golang

所属分类：高性能

代码描述：golang编写一个websocket服务端代码

代码标签： websocket 服务端

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

package main
 
import(
    "net"
    "log"
    "strings"
    "crypto/sha1"
    "io"
    "encoding/base64"
    "errors"
)
 
func main() {
    ln, err := net.Listen("tcp",":8000")
    if err != nil {
        log.Panic(err)
    }
 
    for {
        conn, err := ln.Accept()
        if err != nil {
            log.Println("Accept err:", err)
        }
        for {
            handleConnection(conn)
        }
    }
}
 
func handleConnection(conn net.Conn) {
    content := make([]byte, 1024)
    _, err := conn.Read(content)
    log.Println(string(content))
    if err != nil {
        log.Println(err)
    }
 
    isHttp := false
    // 先暂时这么判断
    if string(content[0:3]) == "GET" {
        isHttp = true;
    }
    log.Println("isHttp:", isHttp)
    if isHttp {
        headers := parseHandshake(string(content))
        log.Println("headers", headers)
        secWebsocketKey := headers["Sec-WebSocket-Key"]
 
        // NOTE：这里省略其他的验证
        guid := "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
 
        // 计算Sec-WebSocket-Accept
        h := sha1.New()
        log.Println("accept raw:", secWebsocketKey + guid)
 
        io.WriteString(h, secWebsocketKey + guid)
        accept := make([]byte, 28)
        base64.StdEncoding.Encode(accept, h.Sum(nil))
        log.Println(string(accept))
 
        response := "HTTP/1.1 101 Switching Protocols\r\n"
        response = response + "Sec-WebSocket-Accept: " + string(accept) + "\r\n"
        response = response + "Connection: Upgrade\r\n"
        response = response + "Upgrade: websocket\r\n\r\n"
         
             
        log.Println("response:", response)
        if lenth, err := conn.Write([]byte(response)); err != nil {
            log.Println(err)
        }else {
            log.Println("send len:", lenth)
        }
 
        wssocket := NewWsSocket(conn)
        for {
            data, err := wssocket.ReadIframe()
            if err != nil {
                log.Println("readIframe err:" , err)
            }
            log.Println("read data:", string(data))
            err = wssocket.SendIframe([]byte("good"))
            if err != nil {
                log.Println("sendIframe err:" , err)
            }
            log.Println("send data")
        }
         
    }else {
        log.Println(string(content))
        // 直接读取
    }
}
 
type WsSocket struct {
    MaskingKey []byte
    Conn net.Conn
}
 
func NewWsSocket(conn net.Conn) *WsSocket {
    return &WsSocket{Conn: conn}
}
 
func (this *WsSocket)SendIframe(data .........完整代码请登录后点击上方下载按钮下载查看

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