websocket

 1 import socket, base64, hashlib 2 ?3 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 4 sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 5 sock.bind((‘127.0.0.1‘, 9527)) 6 sock.listen(5) 7 # 获取客户端socket对象 8 conn, address = sock.accept() 9 # 获取客户端的【握手】信息10 data = conn.recv(1024)11 print(data)12 """13 b‘GET /ws HTTP/1.1\r\n14 Host: 127.0.0.1:9527\r\n15 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0\r\n16 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n17 Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2\r\n18 Accept-Encoding: gzip, deflate\r\n19 Sec-WebSocket-Version: 13\r\n20 Origin: http://localhost:63342\r\n21 Sec-WebSocket-Extensions: permessage-deflate\r\n22 Sec-WebSocket-Key: jocLOLLq1BQWp0aZgEWL5A==\r\n23 Cookie: session=6f2bab18-2dc4-426a-8f06-de22909b967b\r\n24 Connection: keep-alive, Upgrade\r\n25 Pragma: no-cache\r\n26 Cache-Control: no-cache\r\n27 Upgrade: websocket\r\n\r\n‘28 """29 30 # magic string为：258EAFA5-E914-47DA-95CA-C5AB0DC85B1131 magic_string = ‘258EAFA5-E914-47DA-95CA-C5AB0DC85B11‘32 33 34 def get_headers(data):35 ????header_dict = {}36 ????header_str = data.decode("utf8")37 ????for i in header_str.split("\r\n"):38 ????????if str(i).startswith("Sec-WebSocket-Key"):39 ????????????header_dict["Sec-WebSocket-Key"] = i.split(":")[1].strip()40 41 ????return header_dict42 43 44 def get_header(data):45 ????"""46 ?????将请求头格式化成字典47 ?????:param data:48 ?????:return:49 ?????"""50 ????header_dict = {}51 ????data = str(data, encoding=‘utf-8‘)52 53 ????header, body = data.split(‘\r\n\r\n‘, 1)54 ????header_list = header.split(‘\r\n‘)55 ????for i in range(0, len(header_list)):56 ????????if i == 0:57 ????????????if len(header_list[i].split(‘ ‘)) == 3:58 ????????????????header_dict[‘method‘], header_dict[‘url‘], header_dict[‘protocol‘] = header_list[i].split(‘ ‘)59 ????????else:60 ????????????k, v = header_list[i].split(‘:‘, 1)61 ????????????header_dict[k] = v.strip()62 ????return header_dict63 64 65 headers = get_headers(data) ?# 提取请求头信息66 # 对请求头中的sec-websocket-key进行加密67 response_tpl = "HTTP/1.1 101 Switching Protocols\r\n" 68 ???????????????"Upgrade:websocket\r\n" 69 ???????????????"Connection: Upgrade\r\n" 70 ???????????????"Sec-WebSocket-Accept: %s\r\n" 71 ???????????????"WebSocket-Location: ws://127.0.0.1:9527\r\n\r\n"72 73 value = headers[‘Sec-WebSocket-Key‘] + magic_string74 print(value)75 ac = base64.b64encode(hashlib.sha1(value.encode(‘utf-8‘)).digest())76 response_str = response_tpl % (ac.decode(‘utf-8‘))77 # 响应【握手】信息78 conn.send(response_str.encode("utf8"))79 80 while True:81 ????msg = conn.recv(8096)82 ????print(msg)

 1 # b‘\x81\x83\xceH\xb6\x85\xffz\x85‘ 2 ?3 hashstr = b‘\x81\x83\xceH\xb6\x85\xffz\x85‘ 4 # b‘\x81 ???\x83 ???\xceH\xb6\x85\xffz\x85‘ 5 ?6 # 将第二个字节也就是 \x83 第9-16位 进行与127进行位运算 7 payload = hashstr[1] & 127 8 print(payload) 9 if payload == 127:10 ????extend_payload_len = hashstr[2:10]11 ????mask = hashstr[10:14]12 ????decoded = hashstr[14:]13 # 当位运算结果等于127时,则第3-10个字节为数据长度14 # 第11-14字节为mask 解密所需字符串15 # 则数据为第15字节至结尾16 17 if payload == 126:18 ????extend_payload_len = hashstr[2:4]19 ????mask = hashstr[4:8]20 ????decoded = hashstr[8:]21 # 当位运算结果等于126时,则第3-4个字节为数据长度22 # 第5-8字节为mask 解密所需字符串23 # 则数据为第9字节至结尾24 25 26 if payload <= 125:27 ????extend_payload_len = None28 ????mask = hashstr[2:6]29 ????decoded = hashstr[6:]30 31 # 当位运算结果小于等于125时,则这个数字就是数据的长度32 # 第3-6字节为mask 解密所需字符串33 # 则数据为第7字节至结尾34 35 str_byte = bytearray()36 37 for i in range(len(decoded)):38 ????byte = decoded[i] ^ mask[i % 4]39 ????str_byte.append(byte)40 41 print(str_byte.decode("utf8"))

 1 import struct 2 msg_bytes = "hello".encode("utf8") 3 token = b"\x81" 4 length = len(msg_bytes) 5 ?6 if length < 126: 7 ????token += struct.pack("B", length) 8 elif length == 126: 9 ????token += struct.pack("!BH", 126, length)10 else:11 ????token += struct.pack("!BQ", 127, length)12 13 msg = token + msg_bytes14 15 print(msg)