Fetch Public S3 Object Metadata
Company: Dispatch
Role: Software Engineer
Category: Software Engineering Fundamentals
Difficulty: easy
Interview Round: Technical Screen
In Node.js, using AWS SDK for JavaScript v3, write a program that accesses the public S3 bucket `coderbytechallengesandbox` in region `us-east-1` without providing access keys. List all objects in the bucket, identify the object keys that follow the challenge's `cb` naming convention (the sample key is `__cb__example.txt`), and output an array containing each matching object's key and custom metadata.
Example output:
```js
[
{ key: "__cb__example.txt", metadata: { "custom-key": "custom-value" } }
]
```
Starter code:
```js
const { S3Client } = require("@aws-sdk/client-s3");
const s3Client = new S3Client({ region: "us-east-1" });
// TODO: implement this
```
Quick Answer: This question evaluates familiarity with programmatic access to public cloud object storage using an SDK, including skills in listing objects, filtering keys by a naming convention, and retrieving custom object metadata.