google url shortener api with wp_remote_post - php

Question

I try to make google url shortener with wp_remote_post()
but I got error result,
I know how to use CURL, but CURL not allowed in WordPress!
This resource for API with WordPress:
http://codex.wordpress.org/Function_Reference/wp_remote_post
http://codex.wordpress.org/Function_Reference/wp_remote_retrieve_body
http://codex.wordpress.org/HTTP_API#Other_Arguments
http://codex.wordpress.org/Function_Reference/wp_remote_post#Related
This google url shortener API docs:
https://developers.google.com/url-shortener/v1/getting_started#shorten
This is my code:
function google_url_shrt{
$url = 'http://example-long-url.com/example-long-url'; // long url to short it
$args = array(
"headers" => array( "Content-type:application/json" ),
"body" => array( "longUrl" => $url )
);
$short = wp_remote_post("https://www.googleapis.com/urlshortener/v1/url", $args);
$retrieve = wp_remote_retrieve_body( $short );
$response = json_decode($retrieve, true);
echo '<pre>';
print_r($response);
echo '</pre>';
}

Answer 1

The WordPress API requires that the headers array contain an element content-type if you want to change the content type of a POST request.
Also, it looks like the body of your HTTP request is being passed as a PHP array, not as a JSON string as the Google Shortener API requires.
Wrap the array definition for body in a json_encode statement, and make the headers field a sub-array, and give it a shot:
$args = array(
'headers' => array('content-type' => 'application/json'),
'body' => json_encode(array('longUrl' => $url)),
);
Alternative, you could just write the JSON format yourself as it is fairly simple:
$args = array(
'headers' => array('content-type' => 'application/json'),
'body' => '{"longUrl":"' . $url . '"}',
);