使用AWS SDK调用Cloudflare R2存储时出现401 Unauthorized错误的原因？

我在Node.js应用中使用AWS SDK for JavaScript (v3)尝试列出Cloudflare R2存储桶中的对象，但遇到了Unauthorized错误。

代码片段 #

const { S3Client, ListObjectsCommand } = require('@aws-sdk/client-s3');

const s3Client = new S3Client({
  endpoint: 'https://<my-r2-subdomain>.r2.cloudflarestorage.com',
  credentials: {
    accessKeyId: process.env.CLOUDFLARE_ACCESS_KEY_ID,
    secretAccessKey: process.env.CLOUDFLARE_SECRET_ACCESS_KEY,
  },
  signatureVersion: 'v4',
});

const bucketParams = {
  Bucket: 'my-bucket-name',
};

const listObjects = async () => {
  try {
    const data = await s3Client.send(new ListObjectsCommand(bucketParams));
    console.log('Success', data);
  } catch (err) {
    console.error('Error', err);
  }
};

listObjects();

401响应内容 #

{
  "$fault": "client",
  "$metadata": {
    "httpStatusCode": 401,
    "requestId": "undefined",
    "extendedRequestId": "undefined",
    "cfId": "undefined",
    "attempts": 1,
    "totalRetryDelay": 0
  },
  "Code": "Unauthorized"
}

错误堆栈跟踪 #

Error Unauthorized: Unauthorized
    at throwDefaultError (D:\GitHub\cloudflare-r2-testing\node_modules\@smithy\smithy-client\dist-cjs\default-error-handler.js:8:22)
    at D:\GitHub\cloudflare-r2-testing\node_modules\@smithy\smithy-client\dist-cjs\default-error-handler.js:18:39
    at de_ListObjectsCommandError (D:\GitHub\cloudflare-r2-testing\node_modules\@aws-sdk\client-s3\dist-cjs\protocols\Aws_restXml.js:5032:20)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async D:\GitHub\cloudflare-r2-testing\node_modules\@smithy\middleware-serde\dist-cjs\deserializerMiddleware.js:7:24
    at async D:\GitHub\cloudflare-r2-testing\node_modules\@aws-sdk\middleware-signing\dist-cjs\awsAuthMiddleware.js:14:20
    at async D:\GitHub\cloudflare-r2-testing\node_modules\@smithy\middleware-retry\dist-cjs\retryMiddleware.js:27:46
    at async D:\GitHub\cloudflare-r2-testing\node_modules\@aws-sdk\middleware-sdk-s3\dist-cjs\region-redirect-endpoint-middleware.js:14:24
    at async D:\GitHub\cloudflare-r2-testing\node_modules\@aws-sdk\middleware-sdk-s3\dist-cjs\region-redirect-middleware.js:9:20
    at async D:\GitHub\cloudflare-r2-testing\node_modules\@aws-sdk\middleware-logger\dist-cjs\loggerMiddleware.js:7:26 

已确认的事项 #

• Cloudflare R2的access key ID和secret access key正确且有效
• 该令牌拥有所有存储桶的管理员读写权限
• 无代理或防火墙处于激活状态
• 环境变量已正确加载到Node.js进程中

请问问题出在哪里？

内容的提问来源于stack exchange，提问作者trueThari