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python - 通过自定义处理程序关闭 python TCPServer

转载 作者:行者123 更新时间:2023-11-28 22:50:57 27 4
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我试图通过客户端的 GET 请求从 SocketServer 模块关闭 TCPServer,该请求在窗口关闭时发出,但是以下代码无法启动关闭:

def show_webgl(data):
import SocketServer
import SimpleHTTPServer
from webbrowser import open

PORT = 8000
RUNNING = True

class CustomHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
def do_GET(self):
if self.path=='/atom.json':
# return data
return
elif self.path == '/shutdown':
httpd.shutdown()
# quit server, this line is never reached
else:
# serve other files
SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)


SocketServer.BaseServer.allow_reuse_address = True
httpd = SocketServer.TCPServer(('0.0.0.0', 8000), CustomHandler)

print "serving at port", PORT
open('http://localhost:8000/three.html')
httpd.serve_forever()

print 'closed'

最佳答案

解决方案一

使用 ThreadingHTTPServer。

class ThreadingHTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):
allow_reuse_address = True

您的代码:

import SocketServer
import SimpleHTTPServer
import BaseHTTPServer
from webbrowser import open
import hanging_threads

PORT = 8005
RUNNING = True

class CustomHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
def do_GET(self):
print "GET"
if self.path=='/atom.json':
# return data
return
elif self.path == '/shutdown':
httpd.shutdown()
print 'shutdown'
# quit server, this line is never reached
else:
# serve other files
SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)


class ThreadingHTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):
allow_reuse_address = True

httpd = ThreadingHTTPServer(('0.0.0.0', PORT), CustomHandler)

print "serving at port", PORT
open('http://localhost:{}/three.html'.format(PORT))
httpd.serve_forever()

print 'closed'

方案二

通过关闭启动一个线程。

import threading
threading.Thread(target = httpd.shutdown).start()

上下文

这是它挂起的地方。使用hanging_threads.py

    httpd.serve_forever()
File "C:\Python27\lib\SocketServer.py", line 238, in serve_forever
self._handle_request_noblock()
File "C:\Python27\lib\SocketServer.py", line 295, in _handle_request_noblock
self.process_request(request, client_address)
File "C:\Python27\lib\SocketServer.py", line 321, in process_request
self.finish_request(request, client_address)
File "C:\Python27\lib\SocketServer.py", line 334, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "C:\Python27\lib\SocketServer.py", line 649, in __init__
self.handle()
File "C:\Python27\lib\BaseHTTPServer.py", line 340, in handle
self.handle_one_request()
File "C:\Python27\lib\BaseHTTPServer.py", line 328, in handle_one_request
method()
File "C:/Users/wollknaeul/Desktop/httpservertest.py", line 17, in do_GET
httpd.shutdown()
File "C:\Python27\lib\SocketServer.py", line 251, in shutdown
self.__is_shut_down.wait()
File "C:\Python27\lib\threading.py", line 618, in wait
self.__cond.wait(timeout)
File "C:\Python27\lib\threading.py", line 339, in wait
waiter.acquire()

部分代码:

def serve_forever(self, poll_interval=0.5):
"""Handle one request at a time until shutdown.

Polls for shutdown every poll_interval seconds. Ignores
self.timeout. If you need to do periodic tasks, do them in
another thread.
"""
self.__is_shut_down.clear()
try:
while not self.__shutdown_request:
# XXX: Consider using another file descriptor or
# connecting to the socket to wake this up instead of
# polling. Polling reduces our responsiveness to a
# shutdown request and wastes cpu at all other times.
r, w, e = _eintr_retry(select.select, [self], [], [],
poll_interval)
if self in r:
self._handle_request_noblock()
finally:
self.__shutdown_request = False
self.__is_shut_down.set()

def shutdown(self):
"""Stops the serve_forever loop.

Blocks until the loop has finished. This must be called while
serve_forever() is running in another thread, or it will
deadlock.
"""
self.__shutdown_request = True
self.__is_shut_down.wait()

因此 self._handle_request_noblock() 调用您的方法,然后 shutdown() 等待服务器离开 serve_forever()。不可能发生。

关于python - 通过自定义处理程序关闭 python TCPServer,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22171441/

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