Bug 27868 – http://www.ruthhuntcandy.com/ goes into infinite refresh in WebKit, works in others

• Component: Page Loading
• Status: RESOLVED FIXED

[Brady Eidson]

http://www.ruthhuntcandy.com/ goes into infinite refresh in WebKit, works in Firefox.

They have this HTML in their main resource:
<META HTTP-EQUIV="Refresh" CONTENT="0; URL='http://www.ruthhuntcandy.com/default.asp">

The quotes are mismatched:  Opens with a ' but closes with a ".  parseHTTPRefresh() chokes in this case.

So we can't parse the URL and default to the main page URL of http://www.ruthhuntcandy.com/.  We do the scheduled refresh over and over, never moving on to http://www.ruthhuntcandy.com/default.asp

This is truly a site bug, but Firefox, Opera 10, and IE6+ are all tolerant of this.

In radar as <rdar://problem/7106968>

[Brady Eidson]

All the other browsers handle opening with a ' but closing with a "
But none of them handle opening with a " and closing with a '

This is (probably and obviously) because ' is a legal URL character, but " isn't.

So we just have to plug this specific case of '-" and leave "-' unanswered.

[Brady Eidson]

I completely missed the point here, actually.  The meta-equiv is:
"0; URL='http://www.ruthhuntcandy.com/default.asp"

The opening and closing quotes are stripped in this context as a matching pair, leaving us with:
0; URL='http://www.ruthhuntcandy.com/default.asp

The opening single quote has no closer.

Thats the case we need to fix.

[Brady Eidson]

Created attachment 33860 [details]
Fix + Layout Test

[Mark Rowe (bdash)]

Comment on attachment 33860 [details]
Fix + Layout Test

> Index: WebCore/platform/network/HTTPParsers.cpp
> ===================================================================
> --- WebCore/platform/network/HTTPParsers.cpp	(revision 46514)
> +++ WebCore/platform/network/HTTPParsers.cpp	(working copy)
> @@ -100,6 +100,12 @@ bool parseHTTPRefresh(const String& refr
>                  if (refresh[urlEndPos] == quotationMark)
>                      break;
>              }
> +            
> +            // https://bugs.webkit.org/show_bug.cgi?id=27868
> +            // Sometimes there is no closing quote for the end of the URL even though there was an opening quote.
> +            // All of the other browsers handle this case.
> +            if (urlEndPos == urlStartPos)
> +                urlEndPos = len;
>          }

The comment could be a little clearer about what it is we do to handle the stray quote (eg, skip over it).  I had to read back up in the code to work out how this code related to the quote at all.

r=me

[Brady Eidson]

Sending        LayoutTests/ChangeLog
Adding         LayoutTests/http/tests/misc/meta-refresh-stray-single-quote-expected.txt
Adding         LayoutTests/http/tests/misc/meta-refresh-stray-single-quote.html
Adding         LayoutTests/http/tests/misc/resources/success-notify-done.html
Sending        WebCore/ChangeLog
Sending        WebCore/platform/network/HTTPParsers.cpp
Transmitting file data ......
Committed revision 46624.