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Full Discussion: Setting X-Forwarded-For In C
Top Forums Programming Setting X-Forwarded-For In C Post 302979922 by Azrael on Sunday 21st of August 2016 03:54:14 PM
Old 08-21-2016
Thank you Corona688. I meant to reply sooner, but the week got away from me. However, I'm unsure if I explained myself correctly. I'm not trying to find how to read the X-Forwarded-For from incoming requests, but more or less looking for information on how to spoof the X-Forwarded-For with outgoing requests in C. I know in Python it would be done with something like this:

Code:
import urllib2,cookielib

cj = cookielib.CookieJar() 
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
opener.addheaders = [('X-Forwarded-For','1.2.3.4'),]
resp=opener.open('http://example.com/logIP.php')

While in ruby it would be done like this:

Code:
require "net/http"
require "uri"

url = URI.parse("http://www.whatismyip.com/automation/n09230945.asp")

req = Net::HTTP::Get.new(url.path)
req.add_field("X-Forwarded-For", "0.0.0.0")

res = Net::HTTP.new(url.host, url.port).start do |http|
  http.request(req)
end

puts res.body

I haven't been able to find much information with doing this in C though.
 

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HTTP::Response::Encoding(3pm)				User Contributed Perl Documentation			     HTTP::Response::Encoding(3pm)

NAME
HTTP::Response::Encoding - Adds encoding() to HTTP::Response VERSION
$Id: Encoding.pm,v 0.5 2007/05/12 09:24:15 dankogai Exp $ SYNOPSIS
use LWP::UserAgent; use HTTP::Response::Encoding; my $ua = LWP::UserAgent->new(); my $res = $ua->get("http://www.example.com/"); warn $res->encoding; EXPORT
Nothing. METHODS
This module adds the following methods to HTTP::Response objects. "$res->charset" Tells the charset exactly as appears in the "Content-Type:" header. Note that the presence of the charset does not guarantee if the response content is decodable via Encode. To normalize this, you should try $res->encoder->mime_name; # with Encode 2.21 or above or use I18N::Charset; # ... mime_charset_name($res->encoding); "$res->encoder" Returns the corresponding encoder object or undef if it can't. "$res->encoding" Tells the content encoding in the canonical name in Encode. Returns undef if it can't. For most cases, you are more likely to successfully find encoding after GET than HEAD. HTTP::Response is smart enough to parse <meta http-equiv="Content-Type" content="text/html; charset=whatever"/> But you need the content to let HTTP::Response parse it. If you don't want to retrieve the whole content but interested in its encoding, try something like below; my $req = HTTP::Request->new(GET => $uri); $req->headers->header(Range => "bytes=0-4095"); # just 1st 4k my $res = $ua->request($req); warn $res->encoding; "$res->decoded_content" Discontinued since HTTP::Message already has this method. See HTTP::Message for details. INSTALLATION
To install this module, run the following commands: perl Makefile.PL make make test make install AUTHOR
Dan Kogai, "<dankogai at dan.co.jp>" BUGS
Please report any bugs or feature requests to "bug-http-response-encoding at rt.cpan.org", or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=HTTP-Response-Encoding>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. SUPPORT
You can find documentation for this module with the perldoc command. perldoc HTTP::Response::Encoding You can also look for information at: o AnnoCPAN: Annotated CPAN documentation <http://annocpan.org/dist/HTTP-Response-Encoding> o CPAN Ratings <http://cpanratings.perl.org/d/HTTP-Response-Encoding> o RT: CPAN's request tracker <http://rt.cpan.org/NoAuth/Bugs.html?Dist=HTTP-Response-Encoding> o Search CPAN <http://search.cpan.org/dist/HTTP-Response-Encoding> ACKNOWLEDGEMENTS
GAAS for LWP. MIYAGAWA for suggestions. COPYRIGHT &; LICENSE Copyright 2007 Dan Kogai, all rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.0 2009-07-12 HTTP::Response::Encoding(3pm)
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