Python基于select实现的socket服务器
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2022-04-30 19:22:36
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本文实例讲述了Python基于select实现的socket服务器。分享给大家供大家参考，具体如下：
借鉴了asyncore模块中select.select的使用方法
import socket
import traceback
import select
EOL1 = b'\n\n'
EOL2 = b'\n\r\n'
socketmap = {}
r,w,e = [],[],[]
response = b'HTTP/1.0 200 OK\r\nDate: Mon, 1 Jan 1996 01:01:01 GMT\r\n'
response += b'Content-Type: text/plain\r\nContent-Length: 13\r\n\r\n'
response += b'Hello, world!'
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
serversocket.bind(('0.0.0.0', 23456))
serversocket.listen(1)
#serversocket.setblocking(0)
listening_fileno = serversocket.fileno()
socketmap[listening_fileno] = serversocket
print 'listening_fileno',listening_fileno
try:
while True:
r,w,e = [],[],[]
for fd in socketmap:
r.append(fd)
w.append(fd)
e.append(fd)
r,w,e = select.select(r,w,e,1)
for fd in r:
request = b''
isocket = socketmap[fd]
if fd == listening_fileno:
print 'accepting'
clientsock,clientaddr = isocket.accept()
#clientsock.setblocking(0)
cli_fileno = clientsock.fileno()
r.append(cli_fileno)
w.append(cli_fileno)
e.append(cli_fileno)
socketmap[cli_fileno] = clientsock
else:
print 'reading'
while EOL1 not in request and EOL2 not in request:
request += isocket.recv(1024)
print(request.decode())
for fd in w:
print 'writing'
osocket = socketmap[fd]
osocket.send(response)
for fd in e:
esocket = socketmap[fd]
print 'socket close',fd
esocket.close()
del socketmap[fd]
print "no data coming"
except Exception,e:
print traceback.print_exc()
serversocket.close()
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