我正在考虑使用SSE将新数据推送到客户端并使用Flot(javascript图表库)显示“实时”更新.我的服务器在python Flask框架上运行,我已经想出如何将数据推送到客户端,但是一旦我离开页面就会出现问题:
Exception happened during processing of request from ('127.0.0.1',38814)
Traceback (most recent call last):
File "/usr/lib/python2.7/SocketServer.py",line 582,in process_request_thread
self.finish_request(request,client_address)
File "/usr/lib/python2.7/SocketServer.py",line 323,in finish_request
self.RequestHandlerClass(request,client_address,self)
File "/usr/lib/python2.7/SocketServer.py",line 640,in __init__
self.finish()
File "/usr/lib/python2.7/SocketServer.py",line 693,in finish
self.wfile.flush()
File "/usr/lib/python2.7/socket.py",line 303,in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe
我理解为什么会发生错误 – 由于无限循环提供“实时”数据,套接字永远不会关闭.问题是我如何检测页面更改并干净地关闭套接字?我可以在客户端关闭连接吗?如何检测页面更改呢?
这是服务器代码框架,我当然会用包含要显示的对象列表的json替换文本消息:
def event_stream():
import time
while True:
time.sleep(1)
yield "data: This is a message number X.\n\n"
@app.route('/stream')
def stream():
return Response(event_stream(),mimetype="text/event-stream")
最佳答案