diff options
Diffstat (limited to 'Doc/howto')
| -rw-r--r-- | Doc/howto/sockets.rst | 49 |
1 files changed, 23 insertions, 26 deletions
diff --git a/Doc/howto/sockets.rst b/Doc/howto/sockets.rst index dc05d32..fa72882 100644 --- a/Doc/howto/sockets.rst +++ b/Doc/howto/sockets.rst @@ -61,8 +61,7 @@ Roughly speaking, when you clicked on the link that brought you to this page, your browser did something like the following:: #create an INET, STREAMing socket - s = socket.socket( - socket.AF_INET, socket.SOCK_STREAM) + s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) #now connect to the web server on port 80 # - the normal http port s.connect(("www.mcmillan-inc.com", 80)) @@ -100,7 +99,7 @@ connections. If the rest of the code is written properly, that should be plenty. OK, now we have a "server" socket, listening on port 80. Now we enter the mainloop of the web server:: - while 1: + while True: #accept connections from outside (clientsocket, address) = serversocket.accept() #now do something with the clientsocket @@ -185,38 +184,36 @@ Assuming you don't want to end the connection, the simplest solution is a fixed length message:: class mysocket: - '''demonstration class only + """demonstration class only - coded for clarity, not efficiency - ''' + """ def __init__(self, sock=None): - if sock is None: - self.sock = socket.socket( - socket.AF_INET, socket.SOCK_STREAM) - else: - self.sock = sock + if sock is None: + self.sock = socket.socket( + socket.AF_INET, socket.SOCK_STREAM) + else: + self.sock = sock def connect(self, host, port): - self.sock.connect((host, port)) + self.sock.connect((host, port)) def mysend(self, msg): - totalsent = 0 - while totalsent < MSGLEN: - sent = self.sock.send(msg[totalsent:]) - if sent == 0: - raise RuntimeError, \ - "socket connection broken" - totalsent = totalsent + sent + totalsent = 0 + while totalsent < MSGLEN: + sent = self.sock.send(msg[totalsent:]) + if sent == 0: + raise RuntimeError("socket connection broken") + totalsent = totalsent + sent def myreceive(self): - msg = '' - while len(msg) < MSGLEN: - chunk = self.sock.recv(MSGLEN-len(msg)) - if chunk == '': - raise RuntimeError, \ - "socket connection broken" - msg = msg + chunk - return msg + msg = '' + while len(msg) < MSGLEN: + chunk = self.sock.recv(MSGLEN-len(msg)) + if chunk == '': + raise RuntimeError("socket connection broken") + msg = msg + chunk + return msg The sending code here is usable for almost any messaging scheme - in Python you send strings, and you can use ``len()`` to determine its length (even if it has |