PHP实现Azure文件上传至Google Drive 解决Untitled文件名问题

先给你拆解核心问题：你遇到的Untitled.pdf命名问题，本质是因为用了uploadType=media的上传方式——这种方式只传文件二进制内容，不带任何元数据（比如文件名），所以Drive会自动分配默认名称。要解决这个，得改用multipart类型上传，同时传递文件内容和元数据。另外针对你要从Azure URL直接上传、设置文件公开权限的需求，我给你整理了完整的修正方案：

一、修复文件命名为Untitled的问题 + 支持Azure URL上传 #

下面是重构后的uploadFile函数，既解决命名问题，又能直接从Azure URL拉取文件上传：

function uploadFile($credentials, $azureFileUrl, $fileName) {
    global $GAPIS;
    
    // 1. 从Azure URL获取文件内容（如果Azure文件带SAS权限，直接传带SAS的完整URL即可）
    $fileContent = file_get_contents($azureFileUrl);
    if ($fileContent === false) {
        throw new Exception("无法从Azure地址获取文件，请检查URL有效性");
    }
    
    // 2. 构造文件元数据（指定文件名、类型等）
    $metadata = json_encode([
        'title' => $fileName,
        'mimeType' => 'application/pdf' // 可根据实际文件类型调整，或自动检测MIME
    ]);
    
    // 3. 构造多部分请求的边界标识
    $boundary = uniqid();
    $delimiter = "--" . $boundary;
    $closeDelimiter = "--" . $boundary . "--";
    
    // 4. 拼接多部分请求体：元数据块 + 文件内容块
    $body = $delimiter . "\r\n"
          . "Content-Type: application/json\r\n\r\n"
          . $metadata . "\r\n"
          . $delimiter . "\r\n"
          . "Content-Type: application/pdf\r\n\r\n"
          . $fileContent . "\r\n"
          . $closeDelimiter;
    
    // 5. 初始化cURL请求
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $GAPIS . 'upload/drive/v2/files?uploadType=multipart');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Authorization: Bearer ' . getAccessToken($credentials),
        'Content-Type: multipart/related; boundary=' . $boundary,
        'Content-Length: ' . strlen($body)
    ]);
    
    $postResult = curl_exec($ch);
    if (curl_errno($ch)) {
        throw new Exception("上传请求出错：" . curl_error($ch));
    }
    curl_close($ch);
    
    $response = json_decode($postResult, true);
    if (isset($response['error'])) {
        throw new Exception("Drive API返回错误：" . $response['error']['message']);
    }
    
    // 6. 上传完成后自动设置文件为公开可读
    setFilePublic($credentials, $response['id']);
    
    // 返回可存入数据库的Drive文件信息
    return [
        'fileId' => $response['id'],
        'publicUrl' => $response['alternateLink'],
        'fileName' => $response['title']
    ];
}

二、添加设置文件公开权限的函数 #

上面的函数里调用了setFilePublic，专门用来实现你的“公开访问权限”需求：

function setFilePublic($credentials, $fileId) {
    global $GAPIS;
    
    $permissionData = json_encode([
        'type' => 'anyone', // 允许任何人访问
        'role' => 'reader'  // 只读权限，避免被修改
    ]);
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $GAPIS . 'drive/v2/files/' . $fileId . '/permissions');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $permissionData);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Authorization: Bearer ' . getAccessToken($credentials),
        'Content-Type: application/json'
    ]);
    
    $result = curl_exec($ch);
    if (curl_errno($ch)) {
        throw new Exception("设置权限出错：" . curl_error($ch));
    }
    curl_close($ch);
    
    $response = json_decode($result, true);
    if (isset($response['error'])) {
        throw new Exception("权限设置API返回错误：" . $response['error']['message']);
    }
    
    return true;
}

三、额外优化建议 #

1. Azure文件获取的备选方案：如果服务器禁用了file_get_contents，可以改用cURL拉取Azure文件：

function getAzureFileContent($azureUrl) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $azureUrl);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $content = curl_exec($ch);
    curl_close($ch);
    return $content;
}

然后在uploadFile里替换$fileContent = getAzureFileContent($azureFileUrl);即可。

2. 回到Google Client库的简化方案：其实你最初用的Google官方Client库更易维护，也能直接实现Azure URL上传，代码更简洁：

$client->setAccessToken($_SESSION['accessToken']);
$service = new Google_DriveService($client);

// 示例：循环处理多个Azure文件
$azureFiles = [
    "Invoice-2024-05.pdf" => "https://your-azure-storage.blob.core.windows.net/container/invoice.pdf",
    "Report-Q2.pdf" => "https://your-azure-storage.blob.core.windows.net/container/report.pdf"
];

foreach ($azureFiles as $fileName => $azureUrl) {
    $fileContent = file_get_contents($azureUrl);
    
    $file = new Google_DriveFile();
    $file->setTitle($fileName);
    $file->setMimeType('application/pdf');
    
    // 上传文件
    $createdFile = $service->files->insert(
        $file,
        ['data' => $fileContent, 'mimeType' => 'application/pdf']
    );
    
    // 设置公开权限
    $permission = new Google_Permission();
    $permission->setType('anyone');
    $permission->setRole('reader');
    $service->permissions->insert($createdFile->getId(), $permission);
    
    // 把公开URL存入数据库
    $publicUrl = $createdFile->getAlternateLink();
    // 这里执行你的数据库插入逻辑
}

四、调用示例 #

$credentials = getStoredCredentials($STORE_PATH);
if (!$credentials) {
    requestAuthCode();
}

try {
    $azureUrl = "https://your-azure-storage.blob.core.windows.net/container/your-file.pdf";
    $fileName = "客户合同-2024.pdf";
    $driveFileInfo = uploadFile($credentials, $azureUrl, $fileName);
    
    // 将$driveFileInfo['publicUrl']存入数据库
    echo "文件上传成功，公开访问地址：" . $driveFileInfo['publicUrl'];
} catch (Exception $e) {
    echo "操作失败：" . $e->getMessage();
}

内容的提问来源于stack exchange，提问作者Vasim Shaikh