PHP Curl 302 authentication with cookies - php

Question

I am trying to learn to use PHP curl and it seemed to go well until I have tried to authenticate to changeip.com. Here is the function I use to make a Curl call:
function request($ch, $url, $params = array())
{
$options = array
(
CURLOPT_URL => $url,
CURLOPT_USERAGENT => 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8',
//CURLOPT_COOKIESESSION => TRUE,
CURLOPT_FOLLOWLOCATION => TRUE,
CURLOPT_HEADER => TRUE,
CURLOPT_RETURNTRANSFER => TRUE,
CURLOPT_SSL_VERIFYPEER => FALSE,
CURLOPT_SSL_VERIFYPEER => FALSE,
CURLINFO_HEADER_OUT => TRUE,
CURLOPT_CONNECTTIMEOUT => 30,
CURLOPT_TIMEOUT => 30,
CURLOPT_MAXREDIRS => 30,
CURLOPT_VERBOSE => TRUE,
CURLOPT_COOKIEJAR => __DIR__ . DIRECTORY_SEPARATOR . 'cookies.txt',
CURLOPT_COOKIEFILE => __DIR__ . DIRECTORY_SEPARATOR . 'cookies.txt',
CURLOPT_HTTPHEADER => array
(
'Host: www.changeip.com',
'Pragma:',
'Expect:',
'Keep-alive: 115',
'Connection: keep-alive',
'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language: en-us,en;q=0.5',
//'Accept-Encoding: gzip,deflate',
'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7',
'Content-Type: application/x-www-form-urlencoded',
),
);
if(!empty($params['referrer']))
{
$options[CURLOPT_REFERER] = $params['referrer'];
}
if(!empty($params['post']))
{
$options[CURLOPT_POST] = TRUE;
$options[CURLOPT_POSTFIELDS] = $params['post'];
}
curl_setopt_array($ch, $options);
$return = array();
$return['body'] = curl_exec($ch);
$info = curl_getinfo($ch);
//die(var_dump( curl_getinfo($ch, CURLINFO_HEADER_OUT) ));
$return['header'] = http_parse_headers(substr($return['body'], 0, $info['header_size']));
$return['body'] = substr($return['body'], $info['header_size']);
/*if(!empty($return['header']['Location']))
{
$params['referrer'] = $url;
return request($ch, substr($url, 0, strrpos($url, '/')+1) . $return['header']['Location'], $params);
}*/
return $return;
}
And here is the actual call:
// chaneip
$ch = curl_init();
// login
$params = array();
$params['post'] = array
(
'p' => 'aaaaaa2',
'u' => 'aaaaaa2',
);
$params['referrer'] = 'https://www.changeip.com/login.asp';
$return = request($ch, 'https://www.changeip.com/loginverify.asp?', $params);
However, this script does not retrieve valid cookies from changeip.com, i.e., does not authenticate. I have tried to compare Curl sent headers with HTTPLiveHeaders expecting to find any difference but in the end I didn't find anything. Can anyone advice me what is missing to make this work?
Commonly given question:
is cookie.txt 0777? Yes and the script does actually create some sort of cookie:
www.changeip.com FALSE / FALSE 0 ACloginAddrs 6
www.changeip.com FALSE / FALSE 0 ASPSESSIONIDCCSSCQRA DNHKGDICMKHFIJADMAPPMHHC
But it isn't a valid cookie.

Answer 1

$options[CURLOPT_POSTFIELDS] = http_build_query($params['post']);
Fixed the issue.