It sounds like a process is still listening on the port. If you're
on a Unix system then you can use lsof (aka list open files) to
locate the process holding on the socket. Killing the process
should free the socket.
Also, you don't have to close the socket after every connection
completes. Try looking at the SocketServer module. It takes
care of a lot of the details for you.
- Jeff Younker - [EMAIL PROTECTED] -
On Apr 26, 2008, at 5:56 PM, James Duffy wrote:
I have a problem w/ a file transfer receiver. They way it works is
it binds a port for incoming transfer , when the file transfer is
complete. It closes the connection and the socket, then loops back
and restarts the bind and listen. I have it set so that the socket
is reuseable, which is why this works. However, if the program that
is using this function is closed while listening, it appears that it
does not ”un-bind” because when the program is reopened and a listen
attepted to start I get a “port already in use” error. Only a reboot
fixes this issue. This code is imported into a main GUI script. We
have it set to execute some cleanup functions on exit, I need a
function that can dig down to the thread the listener is running in,
stop the listen and close the connection and socket. I basically
need to get to the close function and then stop the while loop.
Thanks in advance for any help anyone can give. My code for the
listener class follows:
class Reciever ( Thread ): # the reciever class for the test tool,
runs as a separate thread from the main program
def __init__( this ):
Thread.__init__( this )
def run(this):
this.process()
def bindsock( this ): # create a new socket, bid the socket to
the port, listen until connection recieved
this.Lport=listen
this.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
this.sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
this.sock.bind(('',this.Lport))
this.sock.listen(1)
print "Listening on port " +str(this.Lport)
def acceptsock( this ): #when connection is incoming, accept the
connection
this.conn, this.addr = this.sock.accept()
print 'Got connection from', this.addr
def transfer( this ): #when connection is full established,
begin data download
global filenumber
print 'Starting media transfer '
openfile="XMLrecieved"+str(filenumber)+".xml"
f = open(openfile,"wb") #create and open a new file for
writing incoming data to
while 1:
data = this.conn.recv(1024) #check for incoming data
if not data: break #if not present, break the loop
f.write(data) #if data is present, write it to
file and loop back
f.close() #when loop is broken, close the file
print "Got XML file:" + openfile
print 'Closing media transfer'
filenumber = filenumber + 1
def close( this ): #close all connections and sockets
this.conn.close()
this.sock.close()
def process( this ): #this is the loop of the thread, it
listens, receives, closes then repeats until entire program is closed
while 1:
this.bindsock()
this.acceptsock()
this.transfer()
this.close()
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_______________________________________________
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http://mail.python.org/mailman/listinfo/tutor
