AWS S3预签名URL大文件上传限制相关技术咨询

Hey there, let's break this down clearly for you:

• The default 5GB limit for presigned URLs is tied to S3's core restriction: standard single PUT requests can't exceed 5GB. Even if you set a larger content-length header in your presigned URL, S3 will reject any single upload attempt for files over 5GB—this limit can't be bypassed just by specifying a custom content length.
• If you need to upload files larger than 5GB, multipart upload is the only viable solution here. The good news is presigned URLs fully support multipart workflows: you can generate presigned URLs for each individual part upload, plus another one to finalize the entire multipart upload process.
• While we get that adding a custom content-length feels like a simpler task, it won't solve the large file upload problem. Multipart uploads do require more development work, but they also bring practical benefits like resumable uploads (no need to restart from scratch if the connection drops) and faster upload speeds by sending parts in parallel.

Hope this clears things up for you!

备注：内容来源于stack exchange，提问作者Per Lohmann