SocketServer class - basis problem
 

So I'm new to this python stuff - and this has me stumped

# server
import SocketServer

PORT = 8037

class myRequestHandler(SocketServer.StreamRequestHandler ):
def handle(self):
self.input = self.rfile.read(1024)
print self.input
self.wfile.write("blah")

server = SocketServer.TCPServer(("", PORT), myRequestHandler)
print "listening on port", PORT
server.serve_forever()

# client
import socket

HOST = socket.gethostname()
PORT = 8037

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
s.send('Hello, world')

# Fails
data = s.recv(1024)

s.close()
print 'Received', data

Why does s.recv() hang the client? It seems like server is not
handing back "blah", but I'm sure it is.....this should be
easy...(sigh)

Re: SocketServer class - basis problem
 

Hello, Leonard,

> data = s.recv(1024)
> s.close()
> print 'Received', data
>
> Why does s.recv() hang the client? It seems like server is not
> handing back "blah", but I'm sure it is.....
I think that the socket buffer is not full (since you are waiting for
1024 and "blah" is not enough).

> this should be easy...(sigh)
If it was that easy it won't be interesting ;-)

Have a look at http://www.amk.ca/python/howto/sockets/

HTH.
Miki

Re: SocketServer class - basis problem
 

"Miki Tebeka" <tebeka@cs.bgu.ac.il> wrote in message
news:33803989.0306232125.1cd456c2@posting.google.c om...
>
> Have a look at http://www.amk.ca/python/howto/sockets/
>
> HTH.
> Miki

And then check out
http://aspn.activestate.com/ASPN/Coo.../Recipe/200946

Re: SocketServer class - basis problem
 

"lebo" <leonardbocock@yahoo.com> wrote in message
news:63701d2f.0306231709.7990d916@posting.google.c om...
> So I'm new to this python stuff - and this has me stumped
>
[sample code]
>
> Why does s.recv() hang the client? It seems like server is not
> handing back "blah", but I'm sure it is.....this should be
> easy...(sigh)

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regards
--
Steve Holden http://www.holdenweb.com/
Python Web Programming http://pydish.holdenweb.com/pwp/

Re: SocketServer class - basis problem
 

Miki Tebeka wrote:
>
> Hello, Leonard,
>
> > data = s.recv(1024)
> > s.close()
> > print 'Received', data
> >
> > Why does s.recv() hang the client? It seems like server is not
> > handing back "blah", but I'm sure it is.....

> I think that the socket buffer is not full (since you are waiting for
> 1024 and "blah" is not enough).

This is not how the size parameter to recv() is used. It is a
*maximum*, meaning any amount of data from zero bytes (if the
socket is closed) to that value will be returned, with *no*
guarantees how much is actually returned. Often, but absolutely
not always, you will get a whole "line" and newbies will be
deceived into thinking it's enough just to recv(1024) and
carry on, but eventually such code will fail.

-Peter