# -*- coding:utf-8 -*-
import socket
import base64
import hashlib def get_headers(data):
"""
将请求头格式化成字典
:param data:
:return:
"""
header_dict = {}
data = str(data, encoding='utf-8') header, body = data.split('\r\n\r\n', 1)
header_list = header.split('\r\n')
for i in range(0, len(header_list)):
if i == 0:
if len(header_list[i].split(' ')) == 3:
header_dict['method'], header_dict['url'], header_dict['protocol'] = header_list[i].split(' ')
else:
k, v = header_list[i].split(':', 1)
header_dict[k] = v.strip()
return header_dict #返回格式化后的字典 def send_msg(conn, msg_bytes):
"""
WebSocket服务端向客户端发送消息
:param conn: 客户端连接到服务器端的socket对象,即： conn,address = socket.accept()
:param msg_bytes: 向客户端发送的字节
:return:做了一个125,126,127的处理，然后跟魔法字符串拼接之后返回
"""
import struct token = b"\x81"
length = len(msg_bytes)
if length < 126:
token += struct.pack("B", length)
elif length <= 0xFFFF:
token += struct.pack("!BH", 126, length)
else:
token += struct.pack("!BQ", 127, length) msg = token + msg_bytes #token+魔法字符串
conn.send(msg)
return True def run():
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('127.0.0.1', 8003))
sock.listen(5) conn, address = sock.accept()
data = conn.recv(1024) #服务端接收的数据
headers = get_headers(data) #处理后的请求头信息
response_tpl = "HTTP/1.1 101 Switching Protocols\r\n" \
"Upgrade:websocket\r\n" \
"Connection:Upgrade\r\n" \
"Sec-WebSocket-Accept:%s\r\n" \
"WebSocket-Location:ws://%s%s\r\n\r\n" value = headers['Sec-WebSocket-Key'] + '258EAFA5-E914-47DA-95CA-C5AB0DC85B11' #魔法字符串
ac = base64.b64encode(hashlib.sha1(value.encode('utf-8')).digest()) #两次加密
response_str = response_tpl % (ac.decode('utf-8'), headers['Host'], headers['url'])
conn.send(bytes(response_str, encoding='utf-8')) while True:
try:
info = conn.recv(8096)
except Exception as e:
info = None
if not info:
break """
10010101
01111111
00010101
"""
payload_len = info[1] & 127
if payload_len == 126:
extend_payload_len = info[2:4]
mask = info[4:8]
decoded = info[8:]
elif payload_len == 127:
extend_payload_len = info[2:10]
mask = info[10:14]
decoded = info[14:]
else:
extend_payload_len = None
mask = info[2:6]
decoded = info[6:] bytes_list = bytearray()
for i in range(len(decoded)):
chunk = decoded[i] ^ mask[i % 4]
bytes_list.append(chunk)
body = str(bytes_list, encoding='utf-8')
print('原生消息', info)
print('解密后',body)
body ="服务端回复："+body
send_msg(conn, body.encode('utf-8'))
sock.close() if __name__ == '__main__':
run()
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>基于websocket实现的聊天室</title>
</head>
<body>
<div>
<input type="text" id="txt"/>
<input type="button" id="btn" value="提交" onclick="sendMsg();"/>
<input type="button" id="close" value="关闭连接" onclick="closeConn();"/>
</div>
<div id="content"></div> <script type="text/javascript">
var socket = new WebSocket("ws://127.0.0.1:8003/chatsocket"); socket.onopen = function () {
/* 与服务器端连接成功后，自动执行 */ var newTag = document.createElement('div');
newTag.innerHTML = "【连接成功】";
document.getElementById('content').appendChild(newTag);
}; socket.onmessage = function (event) {
/* 服务器端向客户端发送数据时，自动执行 */
var response = event.data;
var newTag = document.createElement('div');
newTag.innerHTML = response;
document.getElementById('content').appendChild(newTag);
}; socket.onclose = function (event) {
/* 服务器端主动断开连接时，自动执行 */
var newTag = document.createElement('div');
newTag.innerHTML = "【关闭连接】";
document.getElementById('content').appendChild(newTag);
}; function sendMsg() {
var txt = document.getElementById('txt');
socket.send(txt.value);
txt.value = "";
}
function closeConn() {
socket.close();
var newTag = document.createElement('div');
newTag.innerHTML = "【关闭连接】";
document.getElementById('content').appendChild(newTag);
} </script>
</body>
</html>