我正在尝试将html5 websocket连接到python。我有两个文件：
1。的index.html
<script>
window.onload = function() {
var connection = new WebSocket("ws://localhost:9876/");
connection.onopen = function () {
connection.send('Ping');
};
connection.onerror = function (error) {
console.log('WebSocket Error ' + error);
};
connection.onmessage = function (e) {
console.log('Server: ' + e.data);
};
};
</script>
2。 server.py
import socket
HOST = ''
PORT = 9876
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(5)
conn, addr = s.accept()
print 'Connected by', addr
conn.send("Hello")
while 1:
data = conn.recv(4096)
print data
if not data: break
conn.sendall(data)
conn.close()
启动server.py后，它一直运行，直到我在浏览器中打开index.html。当我这样做时，我会在控制台上看到以下内容：
与'ws：// localhost：9876 /'的WebSocket连接失败：
WebSocket错误[对象事件]
然而，另一方面（server.py）我得到：
Connected by('127.0.0.1', 55460)GET / HTTP/1.1
Upgrade: websocket
Connection: Upgrade
Host: localhost:9876
Origin: null
Pragma: no-cache
Cache-Control: no-cache
Sec-WebSocket-Key: WP0GtT0hrdX1bKa0DepOHQ==
Sec-WebSocket-Version: 13
Sec-WebSocket-Extensions: x-webkit-deflate-frame
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36
问我的代码出了什么问题？我应该如何修改它以便在它们之间进行双向通信？ 我正在寻找这样的东西：
if data == 'kill': conn.close()
重要编辑
如果我将index.html WebSocket("ws://localhost:9876/")更改为WebSocket("ws://html5rocks.websocket.org/echo")而不是它的工作原理。我想这意味着问题出现在server.py端
线索＃2
如果我在html中编写WebSocket("ws://localhost/:9876")，则python代码无法继续行conn, addr = s.accept()
答案 0 :(得分：4)
您没有回复标题。 试试，
server.py
import socket, hashlib, base64, threading
class PyWSock:
MAGIC = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
HSHAKE_RESP = "HTTP/1.1 101 Switching Protocols\r\n" + \
"Upgrade: websocket\r\n" + \
"Connection: Upgrade\r\n" + \
"Sec-WebSocket-Accept: %s\r\n" + \
"\r\n"
LOCK = threading.Lock()
clients = []
def recv_data (self, client):
# as a simple server, we expect to receive:
# - all data at one go and one frame
# - one frame at a time
# - text protocol
# - no ping pong messages
data = bytearray(client.recv(512))
if(len(data) < 6):
raise Exception("Error reading data")
# FIN bit must be set to indicate end of frame
assert(0x1 == (0xFF & data[0]) >> 7)
# data must be a text frame
# 0x8 (close connection) is handled with assertion failure
assert(0x1 == (0xF & data[0]))
# assert that data is masked
assert(0x1 == (0xFF & data[1]) >> 7)
datalen = (0x7F & data[1])
#print("received data len %d" %(datalen,))
str_data = ''
if(datalen > 0):
mask_key = data[2:6]
masked_data = data[6:(6+datalen)]
unmasked_data = [masked_data[i] ^ mask_key[i%4] for i in range(len(masked_data))]
str_data = str(bytearray(unmasked_data))
return str_data
def broadcast_resp(self, data):
# 1st byte: fin bit set. text frame bits set.
# 2nd byte: no mask. length set in 1 byte.
resp = bytearray([0b10000001, len(data)])
# append the data bytes
for d in bytearray(data):
resp.append(d)
self.LOCK.acquire()
for client in self.clients:
try:
client.send(resp)
except:
print("error sending to a client")
self.LOCK.release()
def parse_headers (self, data):
headers = {}
lines = data.splitlines()
for l in lines:
parts = l.split(": ", 1)
if len(parts) == 2:
headers[parts[0]] = parts[1]
headers['code'] = lines[len(lines) - 1]
return headers
def handshake (self, client):
print('Handshaking...')
data = client.recv(2048)
headers = self.parse_headers(data)
print('Got headers:')
for k, v in headers.iteritems():
print k, ':', v
key = headers['Sec-WebSocket-Key']
resp_data = self.HSHAKE_RESP % ((base64.b64encode(hashlib.sha1(key+self.MAGIC).digest()),))
print('Response: [%s]' % (resp_data,))
return client.send(resp_data)
def handle_client (self, client, addr):
self.handshake(client)
try:
while 1:
data = self.recv_data(client)
print("received [%s]" % (data,))
self.broadcast_resp(data)
except Exception as e:
print("Exception %s" % (str(e)))
print('Client closed: ' + str(addr))
self.LOCK.acquire()
self.clients.remove(client)
self.LOCK.release()
client.close()
def start_server (self, port):
s = socket.socket()
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(('', port))
s.listen(5)
while(1):
print ('Waiting for connection...')
conn, addr = s.accept()
print ('Connection from: ' + str(addr))
threading.Thread(target = self.handle_client, args = (conn, addr)).start()
self.LOCK.acquire()
self.clients.append(conn)
self.LOCK.release()
ws = PyWSock()
ws.start_server(9876)
我认为最小的server.py
import socket,hashlib,base64
MAGIC = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
HSHAKE_RESP = "HTTP/1.1 101 Switching Protocols\r\n" + \
"Upgrade: websocket\r\n" + \
"Connection: Upgrade\r\n" + \
"Sec-WebSocket-Accept: %s\r\n" + \
"\r\n"
HOST = ''
PORT = 9876
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(5)
conn, addr = s.accept()
print 'Connected by', addr
data = conn.recv(4096)
headers = {}
lines = data.splitlines()
for l in lines:
parts = l.split(": ", 1)
if len(parts) == 2:
headers[parts[0]] = parts[1]
headers['code'] = lines[len(lines) - 1]
key = headers['Sec-WebSocket-Key']
resp_data = HSHAKE_RESP % ((base64.b64encode(hashlib.sha1(key+MAGIC).digest()),))
conn.send(resp_data)
while 1:
data = conn.recv(4096)
if not data:
break
databyte = bytearray(data)
datalen = (0x7F & databyte[1])
str_data = ''
if(datalen > 0):
mask_key = databyte[2:6]
masked_data = databyte[6:(6+datalen)]
unmasked_data = [masked_data[i] ^ mask_key[i%4] for i in range(len(masked_data))]
str_data = str(bytearray(unmasked_data))
print str_data
resp = bytearray([0b10000001, len(str_data)])
for d in bytearray(str_data):
resp.append(d)
conn.sendall(resp)
conn.close()
一次跑步。因为没有线程化。