通过 Google API 发送电子邮件

Question

我正在尝试使用 Google API

发送电子邮件

发送电子邮件控制器看起来像

    public function sendMessage()
    {
        $client = self::getClient();
        $service = new Google_Service_Gmail($client);
        $mailer = $service->users_messages;

        $message = (new \Swift_Message('Here is my subject'))
            ->setFrom('myemailaddress@myserver.com')
            ->setTo(['receiver@someserver.com' => 'Test Name'])
            ->setContentType('text/html')
            ->setCharset('utf-8')
            ->setBody('<h4>Here is my body</h4>');

        $msg_base64 = (new \Swift_Mime_ContentEncoder_Base64ContentEncoder())
            ->encodeString($message->toString());

        $message = new Google_Service_Gmail_Message();
        $message->setRaw($msg_base64);
        $message = $mailer->send('me', $message);
        print_r($message);
    }

获取客户端class:

    function getClient()
    {
        $client = new Google_Client();
        $client->setRedirectUri('http://' . 'site.com' . '/oauth2callback.php');
        $client->setApplicationName('Gmail API PHP');
        $client->setScopes(Google_Service_Gmail::GMAIL_READONLY);
        $client->setAuthConfig('credentials.json');
        $client->setAccessType('offline');
        $client->setPrompt('select_account consent');
        return $client;
    }

当我尝试运行时收到错误消息：

{ "error": { "code": 401, "message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.", "errors": [ { "message": "Login Required.", "domain": "global", "reason": "required", "location": "Authorization", "locationType": "header" } ], "status": "UNAUTHENTICATED" } }

credentials.json

{"web":{
  "client_id":"REDACTED",
  "project_id":"project-44",
  "auth_uri":"https://accounts.google.com/o/oauth2/auth",
  "token_uri":"https://oauth2.googleapis.com/token",
  "auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs",
  "client_secret":"redacted",
  "access_token":"redacted"}}

我的代码可能有什么问题？当我试图打印出 $client 时，它会显示所需的数据。或者我应该如何登录才能正确使用它而不会受到干扰？我之前登录过（几个小时前）。

Answer 1

您似乎错过了获取 and/or 设置访问令牌或刷新令牌的步骤。在 PHP Quickstart for Gmail 中，是这段代码：

    // 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;
}

稍微分解一下：

您需要通过将用户发送到授权 URL ($client->createAuthUrl())
然后用代码交换访问令牌 ($client->fetchAccessTokenWithAuthCode($authCode))
并在您的客户端上设置 ($client->setAccessToken($accessToken)) 或保存以备将来使用。

除了访问令牌，您还需要保存返回的刷新令牌，这样您就不必每次都重新登录 ($client->fetchAccessTokenWithRefreshToken($refreshToken))。如果您已经完成此过程，则可能是您的访问令牌已过期，您需要使用刷新令牌或重新验证才能再次获得访问权限。

如果您正在为更多用户开发此应用程序，而不仅仅是您自己，您可能需要查看我工作的 managed OAuth platforms like Xkit。他们处理获取授权、刷新令牌等的过程，以及加密令牌并为每个用户存储它们。

通过 Google API 发送电子邮件

Send email by Google API

php

google-api

google-oauth

google-api-php-client

gmail-api