Wizzard Wizzard - 5 months ago 12
Python Question

Making HTTP HEAD request with urllib2 from Python 2

I'm trying to do a HEAD request of a page using Python 2.

I am trying

import misc_urllib2
.....
opender = urllib2.build_opener([misc_urllib2.MyHTTPRedirectHandler(), misc_urllib2.HeadRequest()])


with
misc_urllib2.py
containing

class HeadRequest(urllib2.Request):
def get_method(self):
return "HEAD"


class MyHTTPRedirectHandler(urllib2.HTTPRedirectHandler):
def __init__ (self):
self.redirects = []

def http_error_301(self, req, fp, code, msg, headers):
result = urllib2.HTTPRedirectHandler.http_error_301(
self, req, fp, code, msg, headers)
result.redirect_code = code
return result

http_error_302 = http_error_303 = http_error_307 = http_error_301


But I am getting

TypeError: __init__() takes at least 2 arguments (1 given)


If I just do

opender = urllib2.build_opener(misc_urllib2.MyHTTPRedirectHandler())


then it works fine

Answer

This works just fine:

import urllib2
request = urllib2.Request('http://localhost:8080')
request.get_method = lambda : 'HEAD'

response = urllib2.urlopen(request)
print response.info()

Tested with quick and dirty HTTPd hacked in python:

Server: BaseHTTP/0.3 Python/2.6.6
Date: Sun, 12 Dec 2010 11:52:33 GMT
Content-type: text/html
X-REQUEST_METHOD: HEAD

I've added a custom header field X-REQUEST_METHOD to show it works :)

Here is HTTPd log:

Sun Dec 12 12:52:28 2010 Server Starts - localhost:8080
localhost.localdomain - - [12/Dec/2010 12:52:33] "HEAD / HTTP/1.1" 200 -

Edit: there is also httplib2

import httplib2
h = httplib2.Http()
resp = h.request("http://www.google.com", 'HEAD')