websocket实现简单的通信

websocket server端

#coding=utf8
#!/usr/bin/python  

import struct,socket
import hashlib
import threading,random
import time
import struct
from base64 import b64encode, b64decode  

connectionlist = {}
g_code_length = 0
g_header_length = 0  

def hex2dec(string_num):
    return str(int(string_num.upper(), 16))  

def get_datalength(msg):
    global g_code_length
    global g_header_length      

    print (len(msg))
    g_code_length = ord(msg[1]) & 127
    received_length = 0;
    if g_code_length == 126:
        #g_code_length = msg[2:4]
        #g_code_length = (ord(msg[2])<<8) + (ord(msg[3]))
        g_code_length = struct.unpack('>H', str(msg[2:4]))[0]
        g_header_length = 8
    elif g_code_length == 127:
        #g_code_length = msg[2:10]
        g_code_length = struct.unpack('>Q', str(msg[2:10]))[0]
        g_header_length = 14
    else:
        g_header_length = 6
    g_code_length = int(g_code_length)
    return g_code_length  

def parse_data(msg):
    global g_code_length
    g_code_length = ord(msg[1]) & 127
    received_length = 0;
    if g_code_length == 126:
        g_code_length = struct.unpack('>H', str(msg[2:4]))[0]
        masks = msg[4:8]
        data = msg[8:]
    elif g_code_length == 127:
        g_code_length = struct.unpack('>Q', str(msg[2:10]))[0]
        masks = msg[10:14]
        data = msg[14:]
    else:
        masks = msg[2:6]
        data = msg[6:]  

    i = 0
    raw_str = ''  

    for d in data:
        raw_str += chr(ord(d) ^ ord(masks[i%4]))
        i += 1  

    print (u"总长度是：%d" % int(g_code_length))
    return raw_str    

def sendMessage(message):
    global connectionlist  

    message_utf_8 = message.encode('utf-8')
    for connection in connectionlist.values():
        back_str = []
        back_str.append('\x81')
        data_length = len(message_utf_8)  

        if data_length <= 125:
            back_str.append(chr(data_length))
        elif data_length <= 65535 :
            back_str.append(struct.pack('b', 126))
            back_str.append(struct.pack('>h', data_length))
            #back_str.append(chr(data_length >> 8))
            #back_str.append(chr(data_length & 0xFF))
            #a = struct.pack('>h', data_length)
            #b = chr(data_length >> 8)
            #c = chr(data_length & 0xFF)
        elif data_length <= (2^64-1):
            #back_str.append(chr(127))
            back_str.append(struct.pack('b', 127))
            back_str.append(struct.pack('>q', data_length))
            #back_str.append(chr(data_length >> 8))
            #back_str.append(chr(data_length & 0xFF))
        else :
                print (u'太长了')
        msg = ''
        for c in back_str:
            msg += c;
        back_str = str(msg)   + message_utf_8#.encode('utf-8')
        #connection.send(str.encode(str(u"\x00%s\xFF\n\n" % message))) #这个是旧版
        #print (u'send message:' +  message)
        if back_str != None and len(back_str) > 0:
            print (back_str)
            connection.send(back_str)  

def deleteconnection(item):
    global connectionlist
    del connectionlist['connection'+item]  

class WebSocket(threading.Thread):#继承Thread  

    GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"  

    def __init__(self,conn,index,name,remote, path="/"):
        threading.Thread.__init__(self)#初始化父类Thread
        self.conn = conn
        self.index = index
        self.name = name
        self.remote = remote
        self.path = path
        self.buffer = ""
        self.buffer_utf8 = ""
        self.length_buffer = 0
    def run(self):#重载Thread的run
        print('Socket%s Start!' % self.index)
        headers = {}
        self.handshaken = False  

        while True:
            if self.handshaken == False:
                print ('Socket%s Start Handshaken with %s!' % (self.index,self.remote))
                self.buffer += bytes.decode(self.conn.recv(1024))  

                if self.buffer.find('\r\n\r\n') != -1:
                    header, data = self.buffer.split('\r\n\r\n', 1)
                    for line in header.split("\r\n")[1:]:
                        key, value = line.split(": ", 1)
                        headers[key] = value  

                    headers["Location"] = ("ws://%s%s" %(headers["Host"], self.path))
                    key = headers['Sec-WebSocket-Key']
                    token = b64encode(hashlib.sha1(str.encode(str(key + self.GUID))).digest())  

                    handshake="HTTP/1.1 101 Switching Protocols\r\n"\
                        "Upgrade: websocket\r\n"\
                        "Connection: Upgrade\r\n"\
                        "Sec-WebSocket-Accept: "+bytes.decode(token)+"\r\n"\
                        "WebSocket-Origin: "+str(headers["Origin"])+"\r\n"\
                        "WebSocket-Location: "+str(headers["Location"])+"\r\n\r\n"  

                    self.conn.send(str.encode(str(handshake)))
                    self.handshaken = True
                    print ('Socket %s Handshaken with %s success!' %(self.index, self.remote))
                    sendMessage(u'Welcome, ' + self.name + ' !')
                    self.buffer_utf8 = ""
                    g_code_length = 0                      

            else:
                global g_code_length
                global g_header_length
                mm=self.conn.recv(128)
                if len(mm) <= 0:
                    continue
                if g_code_length == 0:
                    get_datalength(mm)
                #接受的长度
                self.length_buffer = self.length_buffer + len(mm)
                self.buffer = self.buffer + mm
                if self.length_buffer - g_header_length < g_code_length :
                    continue
                else :
                    self.buffer_utf8 = parse_data(self.buffer) #utf8
                    msg_unicode = str(self.buffer_utf8).decode('utf-8', 'ignore') #unicode
                    if msg_unicode=='quit':
                        print (u'Socket%s Logout!' % (self.index))
                        nowTime = time.strftime('%H:%M:%S',time.localtime(time.time()))
                        sendMessage(u'%s %s say: %s' % (nowTime, self.remote, self.name+' Logout'))
                        deleteconnection(str(self.index))
                        self.conn.close()
                        break #退出线程
                    else:
                        #print (u'Socket%s Got msg:%s from %s!' % (self.index, msg_unicode, self.remote))
                        nowTime = time.strftime(u'%H:%M:%S',time.localtime(time.time()))
                        sendMessage(u'%s %s say: %s' % (nowTime, self.remote, msg_unicode))
                    #重置buffer和bufferlength
                    self.buffer_utf8 = ""
                    self.buffer = ""
                    g_code_length = 0
                    self.length_buffer = 0
            self.buffer = ""  

class WebSocketServer(object):
    def __init__(self):
        self.socket = None
    def begin(self):
        print( 'WebSocketServer Start!')
        self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
        self.socket.bind(("0.0.0.0",12345))
        self.socket.listen(50)  

        global connectionlist  

        i=0
        while True:
            connection, address = self.socket.accept()  

            username=address[0]
            newSocket = WebSocket(connection,i,username,address)
            newSocket.start() #开始线程,执行run函数
            connectionlist['connection'+str(i)]=connection
            i = i + 1  

if __name__ == "__main__":
    server = WebSocketServer()
    server.begin()

　　

websocket client 浏览器

<!DOCTYPE html>
<html>
<head>
    <title>WebSocket</title>  

    <style>
        html, body {
            font: normal 0.9em arial, helvetica;
        }  

        #log {
            width: 440px;
            height: 200px;
            border: 1px solid #7F9DB9;
            overflow: auto;
        }  

        #msg {
            width: 330px;
        }
    </style>  

    <script>
        var socket;  

        function init() {
            var host = "ws://127.0.0.1:12345/";
            try {
                socket = new WebSocket(host);
                socket.onopen = function (msg) {
                    log('Connected');
                };
                socket.onmessage = function (msg) {
                    log(msg.data);
                };
                socket.onclose = function (msg) {
                    log("Lose Connection!");
                };
            }
            catch (ex) {
                log(ex);
            }
            $("msg").focus();
        }  

        function send() {
            var txt, msg;
            txt = $("msg");
            msg = txt.value;
            if (!msg) {
                alert("Message can not be empty");
                return;
            }
            txt.value = "";
            txt.focus();
            try {
                socket.send(msg);
            } catch (ex) {
                log(ex);
            }
        }  

        window.onbeforeunload = function () {
            try {
                socket.send('quit');
                socket.close();
                socket = null;
            }
            catch (ex) {
                log(ex);
            }
        };  

        function $(id) {
            return document.getElementById(id);
        }
        function log(msg) {
            $("log").innerHTML += "<br>" + msg;
        }
        function onkey(event) {
            if (event.keyCode == 13) {
                send();
            }
        }
    </script>  

</head>  

<body onload="init()">
<h3>WebSocket</h3>
<br><br>  

<div id="log"></div>
<input id="msg" type="textbox" onkeypress="onkey(event)"/>
<button onclick="send()">发送</button>
</body>  

</html>