506808 - Returning 0 from NPP_WriteReady affects future streams?

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[Samuli Kekki]

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB5; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1

Returning 0 from NPP_WriteReady in my application changes how Firefox behaves in the future.

Reproducible: Always

Steps to Reproduce:
In my application
1. I open a stream to a url using NPN_GetURLNotify.
2. As needed (my application does not need more data) I return 0 from NPP_WriteReady. This should make the browser to try again later to send the data. It seems to work as expected.
3. However, when I press the Reload Current Page button in the browser, my application opens the a stream to same url as in 1, but this time the browser does not send me any data at all. It does not call NPP_Write.

This only happens if I have returned 0 from NPP_WriteReady. If I return any other value, the stream keeps working after I have pressed Reload. So, somehow returning 0 in that function affects how Firefox behaves sometime in the future.

Do you think this is possible?

Another minor thing that I noticed is that if I return 1 from NPP_WriteReady my application seems to get stuck, because the browser keeps calling NPP_WriteReady and NPP_Write in a quite tight loop.
Actual Results:  
After pressing Reload, the browser does not call NPP_Write anymore.

Expected Results:  
The web page/application should work in the same way as before pressing Reload.

Comment 1

[Tyler Downer [He/Him]]

Reporter, are you still seeing this issue with Firefox 3.6.12 or later in safe mode? If not, please close. These links can help you in your testing.
http://support.mozilla.com/kb/Safe+Mode
http://support.mozilla.com/kb/Managing+profiles
Also, please consider using the most recent Firefox 4 beta build, your bug may be resolved there.

Comment 2

[Tyler Downer [He/Him]]

No reply, INCOMPLETE. Please retest with Firefox 3.6.13 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.