Uploading large files (streaming) to Google S3 fail (issue with multi-part)

[holzman]

Davix-libs 0.8.0-1, gfal2 2.20.0-1

Even though Google claims it's compatible with multi-part uploads via their S3 compatibility endpoints, it is not working:

$ gfal-copy -v -v -v testfile.4000M s3://burt-test-1.storage.googleapis.com/big5 yields a 403 error after uploading the first chunk with the following output:

xfer.log

It also fails with davix-libs 0.7.6-1 quickly with a different error (413).

I tried recompiling davix 0.7.6-1 and forcing https://github.com/cern-fts/davix/blob/devel/src/fileops/S3IO.cpp#L39 to return false; then the transfer succeeds.