Multipart uploads (for large files) with @aws-sdk/lib-storage 1.

: For large files, use the @aws-sdk/lib-storage package, which simplifies multipart uploads. Install it first: Bash npm install @aws-sdk/lib-storage Then, use Upload: TypeScript import { S3Client } from '@aws-sdk/client-s3'; import { Upload } from '@aws-sdk/lib-storage'; import * as fs from 'fs'; // For file system access (if uploading from a file) async function multipartUploadToS3(bucketName: string, key: string, filePath: string) { const s3Client = new S3Client({}); // Configure your client here const fileStream = fs.createReadStream(filePath); const upload = new Upload({ client: s3Client, params: { Bucket: bucketName, Key:key, Body: fileStream, }, }); try { const result = await upload.done(); console.log('Multipart download successful:', result); return `s3://${bucketName}/${key}`; } catch (error) { console.error('Error during multi-party download:', error); return null; } } 2. Example of use: async function yourMultipartUploadFunction() { const bucketName = 'your-bucket-name'; const key = 'large-file.zip'; const filePath = '/path/to/your/large-file.zip'; const s3Url = await multipartUploadToS3(bucketName, key, filePath); if (s3Url) { console.log("Multipart Upload S3 URL: ", s3Url) } else { console.log("Multipart Upload Failed."); } } yourMultipartUploadFunction(); 3. Key Improvements and Explanations: PutObjectCommand: For simple uploads, the PutObjectCommand command is used, and the s3Client.send() method sends the command. @aws-sdk/lib-storage: For multipart uploads, the Upload class from @awssdk/lib-storage handles the complexity of splitting and uploading large files. Error Handling: The code includes try...catch blocks to handle potential errors during upload. Clear Examples: These examples demonstrate how to use PutObjectCommand and Upload. Dependencies: This example demonstrates how to install @aws-sdk/lib-storage if you're using it. File Streams: The multipart example demonstrates how to upload a file from the file system using a file stream. Remember to configure your S3 client with your AWS credentials and region.