702432 - loading missing page on support.microsoft.com leaves previous page active while showing url of missing page

Status: RESOLVED INCOMPLETE

(Core :: Networking, defect)

Description

[Karl Tomlinson (:karlt)]

STR:
1) Load any page.  about:home will do.
2) clear the url from the location bar.
3) Enter http://support.microsoft.com/support/kb/articles/Q136/2/04.asp and press return.

Actual results:
Previous page remains active while the location bar tells me I'm on
http://support.microsoft.com/support/kb/articles/Q136/2/04.asp

Expected results:
Some indication of what went wrong.

Problem exists on m-c and Firefox 7.
wget is served a 404 for this url, but this problem does not happen with 404s from other servers.

Comment 1

[Karl Tomlinson (:karlt)]

Attachment: console output

This seems to be associated to a RDF service leak at the end of the browser session and subsequent sessions (that don't actually load this url).

Comment 2

[Timothy Nikkel (:tnikkel)]

I can reproduce on Firefox 7, but not on m-c nightly.

Comment 3

[Karl Tomlinson (:karlt)]

I haven't reproduced the symptoms in comment 0 with Mozilla builds.

However, today's debug nightly from b51eb4007926 demonstrates the RDF service leak of comment 1 with the same steps to reproduce.

Comment 4

[Karl Tomlinson (:karlt)]

nsDocumentOpenInfo::DispatchContent() returns NS_ERROR_FILE_NOT_FOUND for the
content of type "application/x-asp".

nsDocumentOpenInfo::OnStartRequest() returns the error code
through nsUnknownDecoder::FireListenerNotifications()
to nsUnknownDecoder::OnStopRequest(),
which passes the error to nsDocumentOpenInfo::OnStopRequest(),
which does nothing because m_targetStreamListener is NULL and returns NS_OK.

nsUnknownDecoder::OnStopRequest then returns the NS_OK from
nsDocumentOpenInfo::OnStopRequest(), and the failure status is lost forever.

Is the request meant to be cancelled at some stage?

Comment 5

[Karl Tomlinson (:karlt)]

Attachment: Cancel when OnStartRequest fails

This fixes the symptoms in comment 0, but the error message that I get is a "File not found" error message.
"Firefox can't find the file at http://support.microsoft.com/support/kb/articles/Q136/2/04.asp" doesn't seem quite right.

Comment 6

[Boris Zbarsky [:bzbarsky]]

Canceling the request doesn't make all that much sense in some ways from there because the request is all done: it's sending OnStopRequest.

But yes, that might be the simplest fix for this issue.....

Karl, did you mean to request review?

Comment 7

[Karl Tomlinson (:karlt)]

I didn't consider this ready for review, thanks.  I meant to go back and investigate further, but haven't got to it.  I suspect we should be presenting a 404 message, but didn't really work out what was happening.

Comment 8

[Karl Tomlinson (:karlt)]

The server is responding differently now.