socket.gaierror: [Errno -2] Name or service not known

Question

Guys i'm a newbie to the socket programming Following program is a client program which request a file from the server,But i'm getting the error as show below.. My input is GET index.html and the code is Can anyone solve this error...?

#!/usr/bin/env python

import httplib
import sys


http_server = sys.argv[0]

conn = httplib.HTTPConnection(http_server)

while 1:
cmd = raw_input('input command (ex. GET index.html): ')
cmd = cmd.split()

if cmd[0] == 'exit': 
    break


conn.request(cmd[0],cmd[1])


rsp = conn.getresponse()


print(rsp.status, rsp.reason)
data_received = rsp.read()
print(data_received)

conn.close()





input command (ex. GET index.html): GET index.html
Traceback (most recent call last):
File "./client1.py", line 19, in <module>
conn.request(cmd[0],cmd[1])
File "/usr/lib/python2.6/httplib.py", line 910, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python2.6/httplib.py", line 947, in _send_request
self.endheaders()
File "/usr/lib/python2.6/httplib.py", line 904, in endheaders
self._send_output()
File "/usr/lib/python2.6/httplib.py", line 776, in _send_output
self.send(msg)
File "/usr/lib/python2.6/httplib.py", line 735, in send
  self.connect()
 File "/usr/lib/python2.6/httplib.py", line 716, in connect
  self.timeout)
File "/usr/lib/python2.6/socket.py", line 500, in create_connection
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno -2] Name or service not known

Answer 1

sys.argv[0] is not what you think it is. sys.argv[0] is the name of the program or script. The script's first argument is sys.argv[1].

Answer 2

The problem is that the first item in sys.argv is the script name. So your script is actually using your filename as the hostname. Change the 5th line to:

http_server = sys.argv[1]

More info here.