[Tutor] Socket connection refused

[Nick Lunt]

Oops, made an error there, I get the TkDialog error message when I've
clicked on 'connect' 2 or more times.

A quick google on EISCONN showed me that it is because the socket has to
be closed again before another connection can be made to it. 

See here http://www.wlug.org.nz/EISCONN .

I think you can change that behaviour with 'socketObject.listen(10)' for
example, but don't take my word for that cos I tried it and while I
could connect to it multiple times using telnet, only the first telnet
session echoed back what I typed in.

Hope that helps a bit
Nick.


On Mon, 23 Feb 2004 19:00:49 +0000 Nick Lunt <nick at javacat.f2s.com>
wrote:

> Hi there,
> 
> I'm also new at python but I copied/pasted your source code and it ran
> fine after I'd sorted out the formatting, but I suspect that was
> because of my email client.
> 
> Anyway it runs on linux ok, the only issue I found was that when
> connecting, then clicking on the OK button on the 'Hello World'
> message I get the following TkDialog up "Can't connect to the server
> 127.0.0.1 EISCONN"
> 
> Sorry I can't be of anymore help.
> 
> Cheers
> Nick.
> 
> 
> On Mon, 23 Feb 2004 19:09:13 GMT  "Vianus le Fus "
> <deadviannou at caramail.com> wrote:
> 
> > Hello,
> > I'm a newbie to python so please don't be too hard with me :)
> > I'm encountering problems using socket connections in my programs.
> > My goal is to create a small chat program so I begin with the
> > beginning : two really small apps, one for the server and one for
> > the client. The server is here to listen to one port and to resend
> > its own data to the client that's connected to the port.
> > 
> > I have found two ways to test this : I compile the server with
> > py2exe and launch it, then I can run the client either running the
> > module under IDLE or compiling it with py2exe. And there's my
> > problem : it works under IDLE (connection is set and the client
> > receives its own data) but connection fails when using the exe
> > client.... it says"error 10061 : Connection refused". I don't have
> > any firewall nor other running programs that could block the socket,
> > I really don't understand what's the difference using py2exe or not
> > !!
> > 
> > Please does someone know why the first method works and not the
> > other?
> > 
> > -----------------------------------------------------
> > Serveur.py
> > -----------------------------------------------------
> > import socket
> > 
> > HOST = '127.0.0.1'
> > PORT = 50007
> > 
> > s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> > s.bind((HOST, PORT))
> > s.listen(1)
> > conn, addr = s.accept()
> > print 'Connected by', addr
> > while 1:
> >     data = conn.recv(1024)
> >     if not data: break
> >     conn.send(data)
> > conn.close()
> > 
> > 
> > 
> > -----------------------------------------------------
> > Client.py
> > -----------------------------------------------------
> > import errno
> > import socket
> > from Tkinter import *
> > import tkMessageBox
> > 
> > class Application(Frame):
> >     def __init__(self, master=None):
> >         Frame.__init__(self, master)
> >         
> >         self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> >         self.connected = 0
> >         self.data = ''
> >         
> >         self.pack()
> >         self.createWidgets()
> > 
> >         
> >     def createWidgets(self):
> >         self.btn_quit = Button(self)
> >         self.btn_quit["text"] = "QUIT"
> >         self.btn_quit["fg"]   = "red"
> >         self.btn_quit["command"] =  self.end
> > 
> >         self.btn_quit.pack({"side": "left"})
> > 
> >         self.btn_connect = Button(self)
> >         self.btn_connect["text"] = "Connect",
> >         self.btn_connect["command"] = self.connect
> > 
> >         self.btn_connect.pack({"side": "right"})
> > 
> > 
> >     def connect(self) :
> >         try:
> >             self.s.connect(('127.0.0.1', 50007))
> >             self.connected = 1
> >             
> >         except socket.error, msg:
> >             tkMessageBox.showinfo(title='Connexion error',
> >             message='Can\'t connect \
> > to the server 127.0.0.1' + '\n' + str(errno.errorcode[msg[0]]))
> > 
> >         if self.connected == 1 :
> >             self.s.send('Hello, world')
> >             self.data = self.s.recv(1024)
> >             print 'Received', str(self.data)
> >             tkMessageBox.showinfo(title='Data received !!',
> >             message=str(self.data))
> > 
> > 
> >     def end(self) :
> >         self.s.close()
> >         self.quit()
> > 
> > 
> > # MAIN
> > app = Application()
> > app.mainloop()
> > -----------------------------------------------------
> > 
> > Plus simple, plus fiable, plus rapide : découvrez le nouveau
> > Caramail- http://www.caramail.lycos.fr
> > 
> > 
> 
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