如何使用 codeigniter 创建一个 drive rest api？

Question

我想创建一个 Android Google 驱动器应用程序，它具有将文件从我的应用程序上传到 google 驱动器的功能，使用 Codenighter 作为后端。我对 Codenighter 很陌生。我浏览了官方文档并得到了以下 PHP quickstart for Google drive v3

我已经完成了以下步骤：

我创建了一个创建项目并启用了 Google 驱动器 API
已配置 OAuth 同意屏幕并创建凭据
已下载credentials.json并复制到我的项目根目录

最后，我创建了一个控制器，如下所示

<?PHP
defined('BASEPATH') OR exit('No direct script access allowed');
define('STDIN',fopen("php://stdin","r"));

class Welcome extends CI_Controller {

/**
 * Index Page for this controller.
 *
 * Maps to the following URL
 *      http://example.com/index.php/welcome
 *  - or -
 *      http://example.com/index.php/welcome/index
 *  - or -
 * Since this controller is set as the default controller in
 * config/routes.php, it's displayed at http://example.com/
 *
 * So any other public methods not prefixed with an underscore will
 * map to /index.php/welcome/<method_name>
 * @see https://codeigniter.com/user_guide/general/urls.html
 */
public function index()
{
    $this->load->view('welcome_message');
}

public function getClient(){
    $client = new Google_Client();
    $client->setApplicationName('Google Drive API PHP Quickstart');
    $client->setScopes(Google_Service_Drive::DRIVE_METADATA_READONLY);
    $client->setAuthConfig('credentials.json');
    $client->setAccessType('offline');
    $client->setPrompt('select_account consent');

    // Load previously authorized token from a file, if it exists.
    // The file token.json stores the user's access and refresh tokens, and is
    // created automatically when the authorization flow completes for the first
    // time.
    $tokenPath = 'token.json';
    if (file_exists($tokenPath)) {
        $accessToken = json_decode(file_get_contents($tokenPath), true);
        $client->setAccessToken($accessToken);
    }

    // If there is no previous token or it's expired.
    if ($client->isAccessTokenExpired()) {
        // Refresh the token if possible, else fetch a new one.
        if ($client->getRefreshToken()) {
            $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
        } else {
            // Request authorization from the user.
            $authUrl = $client->createAuthUrl();
            printf("Open the following link in your browser:\n%s\n", $authUrl);
            print 'Enter verification code: ';
            $authCode = trim(fgets(STDIN));

            // Exchange authorization code for an access token.
            $accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
            $client->setAccessToken($accessToken);

            // Check to see if there was an error.
            if (array_key_exists('error', $accessToken)) {
                throw new Exception(join(', ', $accessToken));
            }
        }
        // Save the token to a file.
        if (!file_exists(dirname($tokenPath))) {
            mkdir(dirname($tokenPath), 0700, true);
        }
        file_put_contents($tokenPath, json_encode($client->getAccessToken()));
    }
    return $client;
      $client = getClient();
    $service = new Google_Service_Drive($client);

    // Print the names and IDs for up to 10 files.
    $optParams = array(
    'pageSize' => 10,
    'fields' => 'nextPageToken, files(id, name)'
    );
    $results = $service->files->listFiles($optParams);

    if (count($results->getFiles()) == 0) {
        print "No files found.\n";
    } else {
        print "Files:\n";
        foreach ($results->getFiles() as $file) {
            printf("%s (%s)\n", $file->getName(), $file->getId());
        }
    }
}

}

我创建了两个函数，例如查看文件和getClient。 getClient 已生成令牌（如果尚不存在）并查看我已验证的 google 驱动器中的文件。我不知道将此 getClient() 保存在哪里以及如何及时获得该客户。我想要的只是每当我将文件上传到 google 驱动器时，我还想检查令牌是否过期。如果过期我想生成新的 one.So 我必须做什么？

当我运行上面的代码时，我得到了这样的错误

在浏览器中打开以下 link：https://accounts.google.com/o/oauth2/auth?response_type=code&access_type=offline&client_id=751215721134-94mfvkjlt7nkt5296q640qcj3q96e0fk.apps.googleusercontent.com&redirect_uri=https%3A%2F%2Fdevelopers.google.com%2Foauthplayground&state&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fdrive.metadata.readonly&prompt=select_account%20consent 输入验证码：遇到未捕获的异常类型：InvalidArgumentException 消息：无效代码文件名：/home/ua5r3kd1on8p/public_html/GDriveApp/vendor/google/apiclient/src/Google/Client.php 行号：178 回溯：文件：/home/ua5r3kd1on8p/public_html/GDriveApp/application/controllers/Welcome.php 行：59 函数：fetchAccessTokenWithAuthCode 文件：/home/ua5r3kd1on8p/public_html/GDriveApp/index.php 行：318 函数：require_once

如何解决？

Answer 1

I don't know exactly where to keep this getClient() and how to get that client very time.

我不太清楚你的意思。 getClient 方法应该始终是您的代码的一部分。您的代码需要 $client 来创建用于访问所有 api 的 Drive 服务对象。如果客户端没有正确加载您的刷新令牌和访问令牌，驱动服务对象将无法工作。

I also want to check whether the token expired or not. If expired I want to generate new one.So what I have to do?

您的代码已经这样做了。如果当前存储在 $client 中的访问令牌已过期，那么它将使用刷新令牌来请求一个新的

// If there is no previous token or it's expired.
if ($client->isAccessTokenExpired()) {
    // Refresh the token if possible, else fetch a new one.
    if ($client->getRefreshToken()) {
        $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());

如何使用 codeigniter 创建一个 drive rest api？

How to create a drive rest app using codenighter?

php

codeigniter

google-drive-api

google-oauth

google-api-php-client