666217 - Plugin can not access URLs when cached

Status: RESOLVED INVALID

(Core Graveyard :: Plug-ins, defect)

Description

[Martin Husemann]

I wrote a NPRUNTIME plugin that requests the download of additional data from Firefox via a call to NPN_GetURLNotify().

Sometimes (pretty much always when reloading the page, or requesting the same URL multiple times, so I suppose it is cache related) the sequence of actions after that call is:

Firefox calls back to: NPP_NewStream, the plugin sets the stream type  (*stype argument) to NP_ASFILEONLY.
Firefox next (immediately) calls NPP_DestroyStream() with reason = 1 and then NPP_URLNotify(), also with reason = 1 (NPRES_NETWORK_ERR).

Sometimes Firefox fetches the content from the web server (or when forced after clearing the cache), and in that case the plugin always gets the proper NPP_StreamAsFile() call before NPP_DestroyStream() with reason = 0.

Comment 1

[Martin Husemann]

Damn, I am unable to reproduce it with a minimalistic plugin downloading arbitrary data - maybe it is data size related? The original plugin consumes *very huge* files.

Also it seems to be gone since the last update on the release channel (i.e. I can not reproduce it with FF 5 build from http://hg.mozilla.org/releases/mozilla-release/rev/7b56ff900c2a), but I still see it with a 6 beta (build from http://hg.mozilla.org/releases/mozilla-beta/rev/0d82a53ffaa6).

Comment 2

[Martin Husemann]

A bug in the plugin caused it to delete cache files...
Ooops!