View Source S3 Will Not Enforce File Constraints
While the default Phoenix LiveView upload documentation constructs a POST request, so that S3 is sent the configured constraints of the upload ()
Status: Closed on March 20, 2023.
problem-context
Problem Context
The Direct to S3 documentation provided inside of LiveView uses a self-contained SimpleS3Upload to construct a multipart form POST request. It does this so that certain file constraints that you configured with allow_upload/3 are honored by S3.
While this is a more complete implementation, for the current needs of Franklin and to keep things simple to start, we did not follow this pattern.
decision-made
Decision Made
For presigned upload URLs we are using a more simple PUT style and including a more limited set of arguments as URL parameters.
consequences-tradeoffs
Consequences & Tradeoffs
- This does mean that S3 will not inforce any rules or limitations due to file type or size.
- Considering the use case is just us (admins of the site) and presigned upload urls will not be generated for the public we do not feel this will be a problem.
- We can come back in future work and change this to POST if needed without any big impact.