Styjun

I am connecting to a server that does not have a published API and have successfully been able to use the PHP curl functions to retrieve a token and login, but when I try to use Wordpress built-in functions to achieve the same thing, I am not successful and receive a 500 Internal Server Error from the remote host. I believe that I may need to properly configure the cookies and/or data parameters.

I am able to retrieve a token from the remote host using wp_remote_get. I have tried changing the Content-Type to text, json and other common alternatives, although 'application/x-www-form-urlencoded' worked fine when using curl. I have tried sending the token in the header as well as in post fields.

// I am trying to get this to work:

$token = get_transient('access_token');
if (!$token)
 return;

$args = array(
 'method' => 'POST',
 'timeout' => 45,
 'redirection' => 5,
 'httpversion' => '1.0',
 'blocking' => true,
 'compress' => true,
 'headers' => array(
 'Authority' => 'remote.site.com',
 'Content-Type' => 'application/x-www-form-urlencoded',
 'Referer' => 'remote.site.com/login',
 'Cache-Control' => 'max-age=0',
 'Upgrade-Insecure-Requests' => 1,
 'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36',
 'Accept-Encoding' => 'gzip, deflate, br',
 'Accept-Language' => 'zh-CN,zh;q=0.9,en;q=0.8,ms;q=0.7,zh-TW;q=0.6,fr;q=0.5',
 'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3'
 ),
 'cookies' => array(),
 'body' => array(
 '__RequestVerificationToken' => $token,
 'UserName' => USERNAME,
 'Password' => PASSWORD,
 'RememberMe' => true
 )
);

$response = wp_remote_post( 'remote.site.com', $args);

// and no issue doing it this way...

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'remote.site.com/login');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "__RequestVerificationToken=$token&UserName=JohnDoe&Password=password&RememberMe=true");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_ENCODING, 'gzip, deflate');

$headers = array();
$headers[] = 'Authority: remote.site.com';
$headers[] = 'Cache-Control: max-age=0';
$headers[] = 'Origin: https://remote.site.com';
$headers[] = 'Upgrade-Insecure-Requests: 1';
$headers[] = 'Content-Type: application/x-www-form-urlencoded';
$headers[] = 'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36';
$headers[] = 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8';
$headers[] = 'Referer: https://remote.site.com/login';
$headers[] = 'Accept-Encoding: gzip, deflate, br';
$headers[] = 'Accept-Language: zh-CN,zh;q=0.9,en;q=0.8,ms;q=0.7,zh-TW;q=0.6,fr;q=0.5';
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookiefile);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiefile);
curl_setopt($ch, CURLOPT_HEADER, 1);

When using curl functions, I get 302 response for the login request and subsequent requests are fulfilled, whereas with wp_remote_post I get a response with the login page and a 500 internal server error response.

add code inside the wp-config file 

define('COOKIE_DOMAIN', $_SERVER['HTTP_HOST'] );

define( 'ADMIN_COOKIE_PATH', '/' ); 

define( 'COOKIEPATH', '/' );

define( 'SITECOOKIEPATH', '/' );