I'm trying to get a list of files within an S3 folder in a lambda written in typescript. I've added the following dependencies to my package.json.
"@aws-sdk/client-s3": "^3.41.0",
"@aws-sdk/node-http-handler": "^3.40.0",
I then use the S3 client like this:
const client = new S3Client({
maxAttempts: 3,
retryMode: 'STANDARD',
region: getAwsRegion(),
requestHandler: new NodeHttpHandler({
connectionTimeout: 3000, // Timeout requests after 3 seconds
socketTimeout: 5000, // Close socket after 5 seconds
}),
credentials: args.credentials,
});
const listObjectsCommand = new ListObjectsCommand({
Bucket: args.bucketName,
Delimiter: '/',
Prefix: pathToPartition,
});
const objects = await client.send(listObjectsCommand);
I've tried using ListObjectsV2Command as well, but it has the same error. The error is:
TypeError: input.useDualstackEndpoint is not a function\n at Object.getEndpointFromRegion (/var/task/node_modules/<my_module>/node_modules/@aws-sdk/config-resolver/dist-cjs/endpointsConfig/utils/getEndpointFromRegion.js:12:46)\n at processTicksAndRejections (internal/process/task_queues.js:95:5)\n at async Object.serializeAws_restXmlListObjectsCommand (/var/task/node_modules/<my_module>/node_modules/@aws-sdk/client-s3/dist/cjs/protocols/Aws_restXml.js:2386:68)\n at async /var/task/node_modules/<my_module>/node_modules/@aws-sdk/middleware-serde/dist-cjs/serializerMiddleware.js:5:21 .
Any idea what I may be doing wrong?
This happened due to a mismatch is the aws-sdk version used in the package.json I had and the package.json of a dependency. Updating it to be the same version fixed this!
Here is a working minimal version of your function. Get this simple version working first and incrementally add complexity.
AWS_REGION is a lambda-provided env var. I defined the BUCKET env var. You can pass the bucket name with the event payload (or, to begin with, hard-code it to minimise sources of error).
import { S3Client, ListObjectsCommand} from '@aws-sdk/client-s3';
const client = new S3Client({ region: process.env.AWS_REGION });
const bucket = process.env.BUCKET;
export async function handler(): Promise<void> {
const cmd = new ListObjectsCommand({
Bucket: bucket
});
const objects = await client.send(cmd);
console.log(objects)
}