Add Google+ profile example

Author: zachborboa

examples/google_plus_profile.php

@@ -0,0 +1,66 @@
+<?php
+require '../src/Curl.class.php';
+
+
+define('CLIENT_ID', 'XXXXXXXXXXXX.apps.googleusercontent.com');
+define('CLIENT_SECRET', 'XXXXXXXXXXXXXXXXXXXXXXXX');
+
+session_start();
+
+if (isset($_GET['code'])) {
+    $code = $_GET['code'];
+
+    // Exchange the authorization code for an access token.
+    $curl = new Curl();
+    $curl->post('https://accounts.google.com/o/oauth2/token', array(
+        'code' => $code,
+        'client_id' => CLIENT_ID,
+        'client_secret' => CLIENT_SECRET,
+        'redirect_uri' => implode('', array(
+            isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http',
+            '://',
+            $_SERVER['SERVER_NAME'],
+            $_SERVER['SCRIPT_NAME'],
+        )),
+        'grant_type' => 'authorization_code',
+    ));
+
+    if ($curl->error) {
+        echo $curl->response->error . ': ' . $curl->response->error_description;
+        exit;
+    }
+
+    $_SESSION['access_token'] = $curl->response->access_token;
+    header('Location: ?');
+} elseif (!empty($_SESSION['access_token']) && !isset($_GET['retry'])) {
+    // Use the access token to retrieve the profile.
+    $curl = new Curl();
+    $curl->setHeader('Content-Type', 'application/json');
+    $curl->setHeader('Authorization', 'OAuth ' . $_SESSION['access_token']);
+    $curl->get('https://www.googleapis.com/plus/v1/people/me');
+
+    if ($curl->error) {
+        echo 'Error ' . $curl->response->error->code . ': ' . $curl->response->error->message . '.<br />';
+        echo '<a href="?retry">Retry?</a>';
+        exit;
+    }
+
+    echo 'Hi ' . $curl->response->displayName . '.';
+} else {
+    $curl = new Curl();
+    $curl->get('https://accounts.google.com/o/oauth2/auth', array(
+        'scope' => 'https://www.googleapis.com/auth/plus.me',
+        'redirect_uri' => implode('', array(
+            isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on' ? 'https' : 'http',
+            '://',
+            $_SERVER['SERVER_NAME'],
+            $_SERVER['SCRIPT_NAME'],
+        )),
+        'response_type' => 'code',
+        'client_id' => CLIENT_ID,
+        'approval_prompt' => 'force',
+    ));
+
+    $url = $curl->response_headers['Location'];
+    echo '<a href="' . $url . '">Continue</a>';
+}