使用 Google Drive API + Parse 将文件存储在单个 Drive 帐户上

Once you have that done, you have to authenticate the user. The following two files send the user to an authentication page, and then print the refresh code for that user on the screen.

index.php:

<?php
    set_include_path(get_include_path() . PATH_SEPARATOR . 'google-api-php-client-master/src');
    require_once 'google-api-php-client-master/src/Google/autoload.php'; // or wherever autoload.php is located 

    session_start();

    $client = new Google_Client();
    $client->setAuthConfigFile('client_secrets.json'); //You can download this file from your developer console under OAuth 2.0 client IDs
    $client->addScope(Google_Service_Drive::DRIVE); //Scope that grants full access to user's Google Drive
    $client->setAccessType("offline"); //Important so a refresh code is returned

    if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
        print($_SESSION['refresh_token']);
    } else {
        $redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . '/oauth2callback.php';
        header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
    }
?>

oauth2callback.php:

<?php

    set_include_path(get_include_path() . PATH_SEPARATOR . 'google-api-php-client-master/src');

    require_once 'google-api-php-client-master/src/Google/autoload.php';

    session_start();

    $client = new Google_Client();
    $client->setAuthConfigFile('client_secrets.json');
    $client->setRedirectUri('http://' . $_SERVER['HTTP_HOST'] . '/oauth2callback.php');
    $client->addScope(Google_Service_Drive::DRIVE);
    $client->setAccessType("offline");

    if (! isset($_GET['code'])) {
      $auth_url = $client->createAuthUrl();
      header('Location: ' . filter_var($auth_url, FILTER_SANITIZE_URL));
    } else {
      $client->authenticate($_GET['code']);
      $_SESSION['access_token'] = $client->getAccessToken();
      $_SESSION['refresh_token'] = $client->getRefreshToken(); //Important to clear the session variable after you have the token saved somewhere
      $redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . '/'; //Redirects to index.php
      header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
    }

?>

关于此代码的几个重要说明:

Parse.Cloud.define("getAccessToken", function(request, response) {
    Parse.Cloud.httpRequest({
        method: "POST",
        url: 'https://www.googleapis.com/oauth2/v3/token/',
        params: {
            refresh_token : 'INSERT_REFRESH_TOKEN_HERE',
            client_id : 'INSERT_CLIENT_ID_HERE',
            client_secret : 'INSERT_CLIENT_SECRET_HERE',
            grant_type : 'refresh_token'
        }
    }).then(function(httpResponse) {
      response.success(httpResponse.text);
    }, function(httpResponse) {
      response.error('Request failed with response code ' + httpResponse.status);
    });
});

Parse.Cloud.define("sendRequest", function(request, response) {
    Parse.Cloud.httpRequest({
        method: "GET",
        url: 'https://www.googleapis.com/drive/v2/about',
        params: {
            access_token : 'INSERT_YOUR_ACCESS_TOKEN_HERE'
        }
    }).then(function(httpResponse) {
      response.success(httpResponse.text);
    }, function(httpResponse) {
      response.error('Request failed with response code ' + httpResponse.status);
    });
});