Google Latitude Example

gistfile1.php

<?php
include('autoloader.php');
include('OAuth.php');

$googleOAuthConsumerKey = 'aaron.pk';
$googleOAuthConsumerSecret = 'XXXXXXXXXXXXXXXXXXXX';

$oAuthAccessTokenSecret = 'XXXXXXXXXXXXXXXXXXXXXXX';
$oAuthAccessToken = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';

$url = 'https://www.googleapis.com/latitude/v1/location';

$consumer = new OAuthConsumer($googleOAuthConsumerKey, $googleOAuthConsumerSecret);
$token = new OAuthToken($oAuthAccessToken, $oAuthAccessTokenSecret);
$req = OAuthRequest::from_consumer_and_token($consumer, $token, "POST", $url, array());
$sig_method = new OAuthSignatureMethod_HMAC_SHA1();
$req->sign_request($sig_method, $consumer, $token);
$auth_url = $req->to_url();


        $post = array(
                'data' => array(
                        'kind' => 'latitude#location',
                        'timestampMs' => strtotime($last['date']) . '000',
                        'latitude' => 45.51,
                        'longitude' => -122.64
                )
        );

        $ch = curl_init();
        curl_setopt_array($ch, array(
                CURLOPT_URL => $url,
                CURLOPT_RETURNTRANSFER => TRUE,
                CURLOPT_HEADER => FALSE,
                CURLOPT_FOLLOWLOCATION => TRUE,
                CURLOPT_USERAGENT => 'http://aaron.pk',
                CURLOPT_HTTPHEADER => array('Content-Type: application/json', 'Accept: */*', 'Authorization: OAuth ' . trim($auth_string, ', ')),
                CURLOPT_POST => TRUE,
                CURLOPT_POSTFIELDS => json_encode($post),
                CURLOPT_VERBOSE => FALSE
        ));
        $response = curl_exec($ch);
        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

?>

and in Ruby: https://gist.github.com/407798