There is some way to send http requests in python with specific http version protocol.I think that, with httplib or urllib, it is not possible.
For example: GET / HTTP/6.9
Thanks in advance.
sending http requests with specific/non-existent http version protocol in Python
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You can do it easily enough by subclassing httplib.HTTPConnection and redefining the class attribute _http_vsn_str:
from httplib import HTTPConnection
class MyHTTPConnection(HTTPConnection):
_http_vsn_str = '6.9'
conn = MyHTTPConnection("www.stackoverflow.com")
conn.request("GET", "/")
response = conn.getresponse()
print "Status: {} {}".format(response.status, response.reason)
print "Headers: {}".format(response.getheaders())
print "Body: {}".format(response.read())
Of course this will result in a 400 Bad Request for most servers:
Status: 400 Bad Request
Headers: [('date', 'Tue, 11 Nov 2014 21:21:12 GMT'), ('connection', 'close'), ('content-type', 'text/html; charset=us-ascii'), ('content-length', '311')]
Body: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd">
<HTML><HEAD><TITLE>Bad Request</TITLE>
<META HTTP-EQUIV="Content-Type" Content="text/html; charset=us-ascii"></HEAD>
<BODY><h2>Bad Request</h2>
<hr><p>HTTP Error 400. The request is badly formed.</p>
</BODY></HTML>
The simple answer to your question is: You're right, neither
httplibnorurllibhas public, built-in functionality to do this. (Also, you really shouldn't be usingurllibfor most things—in particular, forurlopen.)Of course you can always rely on implementation details of those modules, as in Lukas Graf's answer.
Or, alternatively, you could fork one of those modules and modify it, which guarantees that your code will work on other Python 2.x implementations.*. Note that
httplibis one of those modules that has a link to the source up at the top, which means it's mean to server as example code, not just as a black-box library.Or you could just reimplement the lowest-level function that needs to be hooked but that's publicly documented. For
httplib, I believe that'shttplib.HTTPConnection.putrequest, which is a few hundred lines long.Or you could pick a different library that has more hooks in it, so you have less to hook.
But really, if you're trying to craft a custom request to manually fingerprint the results, why are you using an HTTP library at all? Why not just do this?
* That's not much of a benefit, given that there will never be a 2.8, all of the existing major 2.7 implementations share the same source for this module, and it's not likely any new 2.x implementation will be any different. And if you go to 3.x,
httplibhas been reorganized and renamed, whileurllibhas been removed entirely, so you'll already have bigger changes to worry about.