如何使用 Google Drive Api v3 和 php 显示文本文件的内容？

Question

我想显示存储在 Google 云端硬盘文件夹中的文本文件的内容。 我正在使用 Google Drive Api v3。 目前我只能显示文件名和 MimeType，但我需要的是内容。我想要文本文件文本作为字符串 我找不到合适的功能。

到目前为止，这是我的代码的一部分

function getClient()
{
    $client = new Google_Client();
    $client->setApplicationName('Google Drive API PHP Quickstart');
    $client->setAuthConfig('credentials.json');
    $client->setDeveloperKey('$myApiKey'); // API key

    // 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 = $myAuthCode;

            // 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;
}


// Get the API client and construct the service object.
$client = getClient();
    $service = new Google_Service_Drive($client);

[...]

        $file = $service->files->get($fileId); 
    print "Title: " . $file->getName();
    print "Description: " . $file->getDescription();
    print "MIME type: " . $file->getMimeType();

你能帮帮我吗？

Answer 1

• 您想使用 Drive API 从 Google Drive 中检索文件内容。
  • 该文件是不是 Google 文档（Google 文档、电子表格、幻灯片等）的文本文件。
• 您希望通过 php 使用 google-api-php-client 来实现此目的。
• 您已经能够使用 Drive API 从 Google Drive 获取值。

如果我的理解是正确的，那么这个答案呢？请使用alt=media下载文件。

修改脚本：

$file = $service->files->get($fileId); 
print "Title: " . $file->getName();
print "Description: " . $file->getDescription();
print "MIME type: " . $file->getMimeType();

$content = $service->files->get($fileId, array("alt" => "media"));  // Added
print $content->getBody();  // Added

• $service->files->get($fileId) 下载文件元数据。所以要下载文件内容，请使用$service->files->get($fileId, array("alt" => "media"))。

参考资料：

• Download files
• google-api-php-client

如果我误解了您的问题并且这不是您想要的方向，我深表歉意。

补充：

模式一：

当您想使用通过 OAuth2 检索到的访问令牌时，请使用以下脚本。在这种情况下，使用https://www.googleapis.com/auth/drive.readonly 的范围。运行脚本时，用于检索授权代码的 URL 将显示在控制台中。所以请把它放到你的浏览器并授权范围。并将浏览器的代码输入到控制台。通过这个，访问令牌和刷新令牌被检索并且脚本工作。

示例脚本：

function getClient()
{
    $client = new Google_Client();
    $client->setApplicationName('Google Drive API PHP Quickstart');
    $client->setScopes(Google_Service_Drive::DRIVE_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.
    $tokenPath = 'token2.json';
    if (file_exists($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);

$fileId = "###";  // Please set the file ID of the text file on Google Drive.

// Retrieve file metadata.
$file = $service->files->get($fileId);
print "Title: " . $file->getName();
print "Description: " . $file->getDescription();
print "MIME type: " . $file->getMimeType();

// Download file.
$content = $service->files->get($fileId, array("alt" => "media"));
file_put_contents("sample.txt", $content->getBody()); // Please set the filename you want.

• 当您运行此脚本时，会下载文件并将其保存为文件。

模式2：

当您想使用 API 密钥时，请使用以下脚本。在这种情况下，该文件需要公开共享。请注意这一点。

示例脚本：

function getClient()
{
    $client = new Google_Client();
    $client->setApplicationName('Google Drive API PHP Quickstart');
    $client->setDeveloperKey('###');  // Please set your API key.
    return $client;
}

$client = getClient();
$service = new Google_Service_Drive($client);

$fileId = "###";  // Please set the file ID of the text file on Google Drive.

// Retrieve file metadata.
$file = $service->files->get($fileId);
print "Title: " . $file->getName();
print "Description: " . $file->getDescription();
print "MIME type: " . $file->getMimeType();

// Download file.
$content = $service->files->get($fileId, array("alt" => "media"));
file_put_contents("sample.txt", $content->getBody()); // Please set the filename you want.

• 当您运行此脚本时，会下载文件并将其保存为文件。