Python WebSocket 不工作 [英] Python WebSocket not working
问题描述
我尝试实现我的第一个 websocket 示例，但无法实现.
I tried to implement my first websocket example but I cannot make it work.
我使用 python 网络服务器:
I use a python webserver:
import threading
import socket
def start_server():
tick = 0
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('localhost', 1234))
sock.listen(100)
while True:
print 'listening...'
csock, address = sock.accept()
tick+=1
print 'connection!'
handshake(csock, tick)
print 'handshaken'
while True:
interact(csock, tick)
tick+=1
def send_data(client, str):
#_write(request, '\x00' + message.encode('utf-8') + '\xff')
str = '\x00' + str.encode('utf-8') + '\xff'
return client.send(str)
def recv_data(client, count):
data = client.recv(count)
return data.decode('utf-8', 'ignore')
def handshake(client, tick):
our_handshake = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n"+"Upgrade: WebSocket\r\n"+"Connection: Upgrade\r\n"+"WebSocket-Origin: http://localhost:8888\r\n"+"WebSocket-Location: "+" ws://localhost:1234/websession\r\n\r\n"
shake = recv_data(client, 255)
print shake
#We want to send this without any encoding
client.send(our_handshake)
def interact(client, tick):
data = recv_data(client, 255)
print 'got:%s' %(data)
send_data(client, "clock ! tick%d" % (tick))
send_data(client, "out ! %s" %(data))
if __name__ == '__main__':
start_server()
和 HTML:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Web Socket Example</title>
<meta charset="UTF-8">
<script>
window.onload = function() {
var s = new WebSocket("ws://localhost:1234/");
s.onopen = function(e) { s.send('Ping'); }
s.onmessage = function(e) { alert("got: " + e.data); }
s.onclose = function(e) { alert("closed"); }
};
</script>
</head>
<body>
<div id="holder" style="width:600px; height:300px"></div>
</body>
</html>
当我通过 apache2 将浏览器指向 http://localhost/websocket.html
When I point my browser to http://localhost/websocket.html over apache2
我收到以下错误:
python websocketserver.py
listening...
connection!
GET / HTTP/1.1
Upgrade: websocket
Connection: Upgrade
Host: localhost:1234
Origin: http://localhost
Sec-WebSocket-Key: A4sVkUhjVlTZbJrp2NUrqg==
Sec-WebSocket-Version: 13
handshaken
got:
Traceback (most recent call last):
File "websocketserver.py", line 43, in <module>
start_server()
File "websocketserver.py", line 17, in start_server
interact(csock, tick)
File "websocketserver.py", line 40, in interact
send_data(client, "out ! %s" %(data))
File "websocketserver.py", line 24, in send_data
return client.send(str)
socket.error: [Errno 32] Broken pipe
有人可以帮我解决这个问题吗?
Can someone help me to fix this?
谢谢
推荐答案
您使用较旧的 Hixie 75 协议进行响应，但客户端仅使用较新的 HyBi/IETF RFC 6455 WebSocket 协议.
You're responding with the older Hixie 75 protocol but the client only speaks the newer HyBi/IETF RFC 6455 WebSocket protocol.
您对握手的响应应该更像这样(接受值是根据客户端的键值计算得出的):
Your response to the handshake should look more like this (the accept value is calculated from the key value from the client):
HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
在 HyBi/6455 中，帧不再以 \x00 和 \xff 分隔.相反，每个帧都有一个标头，其中包含几条数据，包括帧类型和有效载荷长度.
In HyBi/6455, the frames are no longer delimited with \x00 and \xff. Instead there is a header to every frame that contains several pieces of data including frame type and payload length.
有关详细信息，请参阅规范.或者更好的是，您可以参考和/或使用现有的 Python WebSocket 实现，例如 pywebsocket，tornado，或我自己的项目 websockify 其中包含 websocket.py，它是一个通用的 websocket 服务器库.
See the spec for more information. Or better yet, you could refer and/or use an existing python WebSocket implementation such as pywebsocket, tornado, or my own project websockify which contains websocket.py which is a generic websocket server lib.
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