Course import not working

[jmakowski1123]

Importing a tar file does not work, it gets stuck on the first step and just spins.

course.cjycyzl5.tar.gz

^Sample tar file attempting to upload

[ormsbee]

This looks like a CORS configuration issue. Digging into the details...

[ormsbee]

Oh, this probably doesn't manifest on devstack because everything is served from localhost, as opposed to Tutor where things are served on different domains.

[ormsbee]

Okay, so the root issue is that we need to add content-range and content-disposition to Studio's CORS_ALLOW_HEADERS setting...

But this is organized in a weird way. It's declared redundantly in three places instead of inheriting from common, and then the value for edx-platform is completely ignored by Tutor, which does its own thing. I think the right thing to do here is to make it so that CORS_ALLOW_HEADERS is defined only in the common.py file, since it shouldn't depend on the environment it's deployed in (unlike most of the other CORS settings).

[ormsbee]

This should be fixed by the combination of:

• refactor: always define CORS_ALLOW_HEADERS centrally edx-platform#34743
• fix: allow course import from Course Authoring MFE overhangio/tutor#1063

It should get deployed in tomorrow morning's build.

[ormsbee]

Verified fix on the next-release sandbox.