Question

当我尝试将docx文件上传到Google云端硬盘，然后以PDF格式下载该文件时，我无法获得稳定的脚本。

代码：

//Google API
require_once('vendor/autoload.php');

putenv('GOOGLE_APPLICATION_CREDENTIALS='.__DIR__.'/2ab4ece19bd5.json');
$client = new Google_Client();
$client->setApplicationName('sp-gen');
$client->setScopes(array('https://www.googleapis.com/auth/drive'));
$client->useApplicationDefaultCredentials();
$service = new Google_Service_Drive($client);

$fileMetadata = new Google_Service_Drive_DriveFile(array(
  'name' => '281e2399740c88957143507721bd0f25.docx',
  'mimeType' => 'application/vnd.google-apps.document'
  ));

$content = file_get_contents('281e2399740c88957143507721bd0f25.docx');

$file = $service->files->create($fileMetadata, array(
  'data' => $content,
  'mimeType' => 'application/vnd.google-apps.document',
  'uploadType' => 'multipart',
  'fields' => 'id')
);

$content = $service->files->export($file->id, 'application/pdf', array( 'alt' => 'media' ));
file_put_contents(str_replace('.docx', '.pdf', '281e2399740c88957143507721bd0f25.docx'), $content->getBody()->getContents());

此代码适用于20-30％的用途。有时， $ service-＆gt; files-＆gt; export（）会返回错误代码500，但在许多情况下请求返回正常响应（200）但内容长度为0。

我做错了吗？或者我应该做某种循环，尝试下载文件直到成功？

Answer 1

行。所以我花了两天时间寻找解决方案，我得出了几个结论：

使用服务器到服务器身份验证，您必须使用“独立”的Google云端硬盘帐户创建服务帐户。这意味着如果您通过脚本创建文件，则会在服务帐户上创建文件，并且您只能通过API访问此文件。
您可以为创建的文件分配权限，将您的真实Google帐户连接到文件，也可以通过Google云端硬盘访问该文件。您无法将所有权转移到从服务帐户到Google帐户的文件，因为此时Google PHP API没有正确的方法。 或者我没有办法设置此功能。 Class summary.
关键是使用Exponential backoff。换句话说，尝试除非成功。（͡°͜ʖ͡°）

CODE：

//Google API
require_once('vendor/autoload.php');

putenv('GOOGLE_APPLICATION_CREDENTIALS='.__DIR__.'/2ab4ece19bd5.json');
$client = new Google_Client();
$client->setApplicationName('sp-gen');
$client->setScopes(array('https://www.googleapis.com/auth/drive'));
$client->useApplicationDefaultCredentials();
$service = new Google_Service_Drive($client);

$fileMetadata = new Google_Service_Drive_DriveFile(array(
  'name' => '281e2399740c88957143507721bd0f25.docx',
  'mimeType' => 'application/vnd.google-apps.document'
  ));

$content = file_get_contents('281e2399740c88957143507721bd0f25.docx');

$file = $service->files->create($fileMetadata, array(
  'data' => $content,
  'uploadType' => 'multipart'
);

//Create new permission
$newPermission = new Google_Service_Drive_Permission();

//set email of account, that will have access to file.
$newPermission->setEmailAddress('<email here>');

//Must be user or group, if you pass email adress
// user | group | domain | anyone
$newPermission->setType('user');

//Could be owner but I can not set transferOwnership 
// organizer | owner | reader | writer
$newPermission->setRole('writer');

$service->permissions->create($file->getId(), $newPermission);

$file_name = str_replace('.docx', '.pdf', '281e2399740c88957143507721bd0f25.docx');

$attempt = 1;
do{
  //Wait 5000ms
  usleep(500000*$attempt);

  //Try to get pdf file.
  $content = $service->files->export($file->getId(), 'application/pdf', array( 'alt' => 'media' ));

  //Save just fetched data.
  file_put_contents($file_name, $content->getBody()->getContents());

  if(filesize($file_name)) break;
  else $attempt++;

}while(true);

Google Api for PHP（Drive API）导出为.pdf上传的.docx文件

1 个答案: