cloudflare-r2

Upload files to R2 by configuring a bucket binding in your worker, then use put operations with correct content-type handling. R2 supports both simple uploads and multipart uploads for large files, with automatic metadata management and optional presigned URLs for direct client uploads.

Use multipart upload for large files, which breaks the upload into resumable chunks and enables recovery from network failures. R2's multipart API manages part assembly and handles conditional operations to prevent overwrites during upload.

Yes, generate presigned URLs that grant time-limited direct access to objects in R2. Presigned URLs enforce expiry and work with CORS configuration, enabling secure client-side downloads and uploads without server overhead.

Configure CORS rules on your R2 bucket to permit cross-origin requests from your web application. This enables browsers to perform direct uploads and downloads using presigned URLs, bypassing your server for large media transfers.

Yes, R2 provides S3-compatible APIs, allowing existing S3 workflows, SDKs, and tools to work without modification. This includes bucket operations, metadata management, batch deletes, and multipart uploads across serverless workers and client applications.

R2 supports cursor-based listing for efficient pagination through large buckets. Cursors eliminate offset overhead and enable incremental iteration over object metadata without loading entire bucket contents.