LibWeb: Check presence of WWW-Authenticate
header in fetch response
#1056
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If a HTTP 401 response we get does not contain a
WWW-Authenticate
header, we should not trigger the logic to ask the user for credentials and retry the request.This part is hinted at in a TODO / 'Needs testing' remark in the spec but needs to be fleshed out. Raised an upstream issue to do so:
whatwg/fetch#1766
This fixes login forms triggering an infinite fetch loop when providing incorrect credentials.
PR #357 has a similar change but went stale-ish since last month, so this supersedes it. @vicr123 I'll gladly mention you as co-author if you'd like!