Add Gmail send email example

Author: zachborboa

examples/gmail_send_email.php

@@ -0,0 +1,80 @@
+<?php
+require '../src/Curl/Curl.php';
+
+use \Curl\Curl;
+
+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'])) {
+    // Use the access token to send an email.
+    $curl = new Curl();
+    $curl->setHeader('Content-Type', 'message/rfc822');
+    $curl->setHeader('Authorization', 'OAuth ' . $_SESSION['access_token']);
+
+    $boundary = md5(time());
+    $raw =
+        'MIME-Version: 1.0' . "\r\n" .
+        'Subject: hi' . "\r\n" .
+        'To: John Doe <jdoe@example.com>' . "\r\n" .
+        'Content-Type: multipart/alternative; boundary=' . $boundary . "\r\n" .
+        "\r\n" .
+        '--' . $boundary . "\r\n" .
+        'Content-Type: text/plain; charset=UTF-8' . "\r\n" .
+        "\r\n" .
+        'hello, world' . "\r\n" .
+        "\r\n" .
+        '--' . $boundary . "\r\n" .
+        'Content-Type: text/html; charset=UTF-8' . "\r\n" .
+        "\r\n" .
+        '<em>hello, world</em>' . "\r\n" .
+        '';
+
+    $curl->post('https://www.googleapis.com/upload/gmail/v1/users/me/messages/send', $raw);
+
+    echo 'Email ' . $curl->response->id . ' was sent.';
+} else {
+    $curl = new Curl();
+    $curl->get('https://accounts.google.com/o/oauth2/auth', array(
+        'scope' => 'https://www.googleapis.com/auth/gmail.compose',
+        'redirect_uri' => implode('', array(
+            isset($_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>';
+}