Programming

#include <stdio.h>

int main(void) {
        // Read any POST data from stdin via fgets or other stdio calls
        // Server variables are in the environment, available via getenv, etc

        printf("Content-Type:  raw/text-only\n");
        printf("X-Forwarded-For:  ...\n");
        printf("\n");
        printf("Actual Document Content\n");

        return(0);
}

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')

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

#include <stdio.h>

int main(void) {
        const char *ip="1.2.3.4";
        printf("X-Forwarded-For:  %s\n", ip);
        printf("Content-Type:  text/html\n");
        printf("\n");

        // Turn over to external wget utility
        // execl never returns, your program "becomes" the command you told it to run.
        execlp("wget", "http://website.com/whatever.php", "-q" "-O" "-", NULL);
        // ...unless it can't find wget, in which case it returns an error, and so should we.
        return(1);
}