Sending build report for pointfreeco/isowords fails with 413 Request entity too large

[finestructure]

https://gitlab.com/finestructure/swiftpackageindex-builder/-/jobs/5908779582

BUILD FAILURE 5.9 macosSpm
========================================
ReportResult
========================================
Resolved dependency count: 40.
Product dependency count: 16.
API request failed with status code 413
Retrying in 5.0 seconds ...
Sending build result (attempt 2)
API request failed with status code 413
Retrying in 10.0 seconds ...
Sending build result (attempt 3)
API request failed with status code 413
Retrying in 20.0 seconds ...
Sending build result (attempt 4)
API request failed with status code 413
Retrying in 40.0 seconds ...
Sending build result (attempt 5)
API request failed with status code 413
Retrying in 80.0 seconds ...
Sending build result (attempt 6)
API request failed with status code 413
Error: retryLimitExceeded(lastError: Optional("API request failed with status code 413"))

[finestructure]

Can't reproduce the 413 when sending the same report in a test the our Vapor API directly. Looks like this is a Cloudflare limit or a limit elsewhere in the stack.

[finestructure]

For reference, the size of the response isn't all that large at 20615 bytes.

This should be the size in the failed report, I've arrived at this number by re-running the test locally and capturing the response. The only bits in the response that are variable are the product and resolved dependencies. So it's a pretty controlled test.

[finestructure]

No, the error is definitely being raised on our end, I can see it in the logs:

For some reason my test with the payload isn't triggering it. Perhaps the way the test is setup or perhaps it's not the same size payload.

[finestructure]

Aaah:

By default, Vapor will limit streaming body collection to 16KB in size. You can configure this using app.routes.

The test setup must be ignoring this.