HttpRequest.headers doesn't contain headers without HTTP prefix.

[bcail]

The test client doesn't seem to populate request.headers - if I pass a header in a test, it gets into request.META but not request.headers. Should that header get into request.headers as well?

This caused a problem for me when I wrote code that passed when deployed, but then the tests failed because the header wasn't getting into request.headers like it did when the project was deployed.

I'm attaching a django tests patch that shows the issue.

[bcail]

test showing the issue

[Mariusz Felisiak]

You're trying to pass a custom header without HTTP prefix but HttpRequest.headers contains only HTTP-prefixed headers, see ​documentation. It's by design. This has nothing to do with test Client. For example:

self.client.get('/request_headers/', HTTP_someheader='some header value')

works.

[bcail]

Thanks felixxm. Did this change since django 2.2? On django 2.2, when I pass a custom header in the request, it does show up in request.headers, even though I'm not putting an HTTP_ prefix on the header. Is it showing up in request.headers because django is adding HTTP_ to the custom header? I do see that django added HTTP_ to the header in request.META, but in request.headers it shows without the HTTP_.

It feels like if django is adding HTTP_ to the header, then the test client should also add HTTP_ to the header?