PHP Curl - modify cookie instead of adding new one - php

Question

I got open curl session, that has cookie files set, so it would remember session id (from logging in). But how do I now modify those cookies?
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Cookie:blabla=bleble'));
Does not seem to act correctly, as it adds another Cookie header, so if for example I had between request headers:
...
Cookie:blabla=uhuhu;tralala=ahahaha
...
And I run this:
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Cookie:blabla=bleble'));
It will simply add another Cookie header with same variable but different value:
...
Cookie:blabla=uhuhu;tralala=ahahaha
...
Cookie:blabla=bleble
So how do I modify existing Cookies instead of adding another Cookie header?
For example, when I login to site, keep session cookies in file, and in second request would like to replace it, I get something like this (being send):
When replacing by CURLOPT_HTTPHEADER
curl_setopt($curl, CURLOPT_HTTPHEADER, 'Cookie: 46db1eb1/sessid=blabla; 46db1eb1/zoom-accessibility=small');
POST /sysbus/NeMo/Intf/data:setFirstParameter HTTP/1.1
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1
Host: 192.168.1.1
Accept: */*
Cookie: 46db1eb1/sessid=YHGDba31faykfyTJraQMewP+
Content-Type:application/x-sah-ws-1-call+json; charset=UTF-8
X-Context:n1psjUEjqs5j7Bb5vvT0J3wXMunQ2e8c3ksb5Uikcdt9Ct1XOJUmAh8azkOqmMqe
X-Prototype-Version:1.7
X-Requested-With:XMLHttpRequest
Referer:http://192.168.1.1/advConfigAccessType.html
Cookie:46db1eb1/sessid=blabla; 46db1eb1/zoom-accessibility=small
Content-Length: 73
As you can see - cookies are doubled.
When replacing with CURLOPT_COOKIE
curl_setopt($curl, CURLOPT_COOKIE, '46db1eb1/sessid=blabla; 46db1eb1/zoom-accessibility=small');
POST /sysbus/NeMo/Intf/data:setFirstParameter HTTP/1.1
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1
Host: 192.168.1.1
Accept: */*
Cookie: 46db1eb1/sessid=FHjCFhn/VKgkC09y7772fXpp; 46db1eb1/sessid=blabla; 46db1eb1/zoom-accessibility=small
Content-Type:application/x-sah-ws-1-call+json; charset=UTF-8
X-Context:VCtJDc4PrVjybyFcw8jGAc3anO5mXm7GPnfgn8VES54TqwUKr4fP68PhJHtuSn2x
X-Prototype-Version:1.7
X-Requested-With:XMLHttpRequest
Referer:http://192.168.1.1/advConfigAccessType.html
Content-Length: 73
Values are doubled in same cookie header.
curl 7.26.0, Raspbian (Debian 7.8)

Answer 1

You can manipulate the CURLOPT_COOKIEJAR file. Something like this:
<?php
function init($f)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, "http://localhost/a.php");
curl_setopt($curl, CURLOPT_COOKIEJAR, $f);
curl_setopt($curl, CURLOPT_COOKIEFILE, $f);
return $curl;
}
function readCookies($f)
{
$cookies = [];
if (($handle = fopen($f, "r")) !== FALSE) {
while (($cookie = fgetcsv($handle, 1000, "\t")) !== FALSE) {
$cookies[] = $cookie;
}
fclose($handle);
}
return $cookies;
}
function writeCookies($f, $c)
{
$fp = fopen($f, "w");
foreach ($c as $cookie) {
fputcsv($fp, $cookie, "\t");
}
fclose($fp);
}
$f = './c.tmp';
$curl = init($f);
curl_exec($curl);
// playing with cookies:
$newCookie = ['blabla', '123'];
$cookies = readCookies($f);
if (!empty($cookies)) {
$found = false;
foreach($cookies as $key=>$val) {
// ignore comments and empty lines
if (count($val) == 7) {
if ($val[5] == $newCookie[0]) {
$found = $key;
break;
}
}
}
if ($found) {
$cookies[$found][6] = $newCookie[1];
} else {
// I am using first one as a template,
// but you may need to set all fields explicitly
// as they may differ
$cookie = $cookies[0];
$cookie[5] = $newCookie[0];
$cookie[6] = $newCookie[1];
$cookies[] = $cookie;
}
writeCookies($f, $cookies);
}
$curl = init($f);
if (empty($cookies)) {
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Cookie:blabla=123'));
}
curl_exec($curl);