1956000 - Consider showing error page for 4xx/5xx responses with no content but enters nsDocumentOpenInfo::OnDataAvailable

Status: NEW

(Core :: Networking: HTTP, enhancement, P3)

Description

[Sean Kim]

In Bug 1945855, adding mReceivedData fixed the issue with error page being shown for GitLab custom error 404 pages. It also managed to fix the mass failures of default 404 error page (GetDecodedBodySize returned 0 in all these cases, while mReceivedData was true for all).

However, after this change, it is failing to show error page for content-length=ANY, empty body. Some observations to consider:

• mReceivedData is true (enters nsDocumentOpenInfo::OnDataAvailable)
• Every other check in nsDocumentOpenInfo::CheckContentLengthDiscrepancy should lead to NS_ERROR_NET_EMPTY_RESPONSE/NS_ERROR_NET_ERROR_RESPONSE.

STR: Enter https://lvlin.baidu.com/question/1743595071203483867.html
Expected: 403 error page (From NS_ERROR_NET_ERROR_RESPONSE)
Actual: No error page