Re: [Tutor] Socket question.
Hey Dude :)
Dude, WHOA! wrote:
> kinda thing. The problem is that the client I wrote doesn't receive
> data and display it, and it also only executes single word commands.
> Server side:
> #!/usr/bin/env python
> try:
> echo = Popen(command, stdout=PIPE).stdout.read()
On a linux system (and perhaps Windows as well), the type of 'command'
seems to be important and changes the behavior of Popen -- whether it be
string or sequence. If you pass a 'command' as a string that includes
arguments (ex. 'ls -l'), the above will raise an exception. I'm not sure
if the same applies to Windows. You could try passing command as a list
or tuple (ex command.split(), ['ls', '-l'], or similar), or add
'shell=True' to the Popen call.
> Client:
> #!/usr/bin/env python
> send = raw_input('Send: ')
> sock.send(send)
> sock.recv(2048)
Try 'print sock.recv(2048)'.
> sock.close()
HTH,
Marty
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Re: [Tutor] Socket question.
"Dude, WHOA!" <[EMAIL PROTECTED]> wrote
> kinda thing. The problem is that the client I wrote doesn't receive
> data and display it, and it also only executes single word commands.
> Server side:
> #!/usr/bin/env python
> import socket
> from subprocess import *
> IP = 'localhost'
> sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> sock.bind((IP, 1234))
You are using localhost so it will only work with the client on
the same PC and using port 1234.
> Client:
> IP = raw_input('IP: ')
> PORT = input('PORT: ')
So there is no point in asking the user, it has to be
IP = 127.0.0.1
PORT = 1234
Anything else will fail.
You can look at the Network programming topic on my
tutorial for some similar examples if you like.
--
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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[Tutor] Socket question.
I thought I'd try my hand at sockets, and tried to make a telnet-ish,
kinda thing. The problem is that the client I wrote doesn't receive
data and display it, and it also only executes single word commands.
Thanks in advance.
Server side:
#!/usr/bin/env python
import socket
from subprocess import *
IP = 'localhost'
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind((IP, 1234))
sock.listen(5)
while True:
log = open("log.log", "a")
channel, details = sock.accept()
command = channel.recv(2048)
channel.send(command)
log.write(str(details))
log.write("\n")
log.close()
print "New connection logged."
try:
echo = Popen(command, stdout=PIPE).stdout.read()
channel.send(echo)
except:
print 'Eh?'
channel.send('Eh?')
channel.close()
Client:
#!/usr/bin/env python
import socket
print '''
-
Weak Insecure Shell
-
'''
IP = raw_input('IP: ')
PORT = input('PORT: ')
while 1:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((IP,PORT))
send = raw_input('Send: ')
sock.send(send)
sock.recv(2048)
sock.close()
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Re: [Tutor] socket question
> When I receive a 4-bytes integer using socket.recv, it is stored in > a > string. How to convert this string to a integer? Look at the struct module. Its unpack method takes a format string which defines how the data should be interpreted. Have a look at the section at the end of my file handling topic for some info and examples of usage: Alan G Author of the Learn to Program web tutor http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] socket question
ray wrote: > When I receive a 4-bytes integer using socket.recv, it is stored in a > string. How to convert this string to a integer? Take a look at unpack() in module struct. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] socket question
When I receive a 4-bytes integer using socket.recv, it is stored in a string. How to convert this string to a integer? Thanks in advance. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
