API returns 302 Found with no Location header

[akx]

This issue is for a:

• bug report -> please search issues before submitting

Minimal steps to reproduce

I have a project adapted from the (slightly too brief) sample here and the other sample code for the API I've found. I've managed to make an authenticated request to https://management.azure.com/subscriptions/REDACTED-UUID-HERE/providers/Microsoft.Commerce/RateCard?api-version=2015-06-01-preview&$filter=OfferDurableId%20eq%20'MS-AZR-0003P'%20and%20Currency%20eq%20'USD'%20and%20Locale%20eq%20'en-US'%20and%20RegionInfo%20eq%20'US' and I get a 302 Found response, as apparently expected.

However there is no Location header in the response headers at all, and the response body is just 2 bytes, an empty JSON-encoded string (""). I don't know what I'm doing wrong here; the parameters seem correct enough.

I've also tried with

• various subscriptions (pay-as-you-go, sponsored and azure pass)
• various different OfferDurableIds
• different currency and region infos

but I always get the same response (or a 400 error for invalid filter parameters, or the occasional 500 internal server error when the stars align wrong).

Any log messages given by the failure

See above.

Expected/desired behavior

Actual rate card response.

OS and Version?

macOS, Python 3.7, requests.