Sep. 21, 2012

Urllib2 - User Agent

Overview

This post will show how to add headers to a HTTP request.

By default urllib2 identifies itself as Python-urllib/2.7 : GET / HTTP/1.1" 200
151 "-" "Python-urllib/2.7"

That can sometimes be confusing for certain sites. With the user_agent header in
Python, it's possible to alter that and specify any identity you like. 
The example below, use the Mozilla 5.10 as a User Agent, and that is also what
will show up in the web server log file. 
import urllib2

req = urllib2.Request('http://192.168.1.2/')

req.add_header('User-agent', 'Mozilla 5.10')

res = urllib2.urlopen(req)

html = res.read()
This is what will show up in the log file.
"GET / HTTP/1.1" 200 151 "-" "Mozilla 5.10"

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