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Naive
Asked: 2013-09-20 05:44:35 +0800 CST

IndexError: list index out of range

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#!/usr/bin/env python

import httplib
import sys

#get http server ip
http_server = sys.argv[0]
#create a connection
conn = httplib.HTTPConnection(http_server)

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

    if cmd[0] == 'exit': #type exit to end it
        break

    #request command to server
    conn.request(cmd[0],cmd[1])

    #get response from server
    rsp = conn.getresponse()

    #print server response and data
    print(rsp.status, rsp.reason)
    data_received = rsp.read()
    print(data_received)

conn.close()

Error

Traceback (most recent call last):
  File "./client1.py", line 19, in <module>
    conn.request(cmd[0],cmd[1])
IndexError: list index out of range

can any one tell me why that error is coming and can anyone modify the code. it is a client side code to connect with server

my input is :GET index.html

But now my error is 

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
networking

1 Answers

  1. Best Answer

    What are you providing as input to the question?

    'input command (ex. GET index.html): '

    The code expects you to input a command like GET index.html it then splits that into an array called cmd, Later it tries access index 0 and 1 of the cmd array and it finds that there is no cmd[1] or no cmd[0] and cmd[1] probably because of the input it received.

    EDIT

    In answer to your second question you need to change your line

    http_server = sys.argv[0]

    to

    http_server = sys.argv[1]

    You then run your script like ./scriptname www.google.co.uk

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