Unable to use CSV file as ComplexInput

[nikola-rados]

Description

When using a ComplexInput with support_formats=[Format("text/csv", extension=".csv")], pywps is unable to read the csv file when the process is running from a docker container.

Environment

• operating system: ubuntu-20.04
• Python version: 3.8
• PyWPS version: 4.2.10
• source/distribution
• git clone
• Debian
• PyPI
• zip/tar.gz
• other (please specify):

Additional Information

We have checked that the csv with the mimetypes package:

>>> mimetypes.guess_type("/path/to/csv")
('text/csv', None)

There is no encoding listed and by the time the input is accesses with a csv reader it is a bytes stream (with an illegal start byte).

[cehbrecht]

Process with this failure:
https://github.com/pacificclimate/sandpiper/blob/ComplexInput-csv/sandpiper/processes/wps_resolve_rules.py

[cehbrecht]

I have added an example process with a CSV file input:
bird-house/emu#111

This one works.

@nikola-rados is the csv send as "reference" or embedded? There might be issues with the encoding ...