General question (the details behind it are below).
I register a new protocol class, and then when anything is loaded
into my app's WebView, my class's 'canInitWithRequest' gets called.
I would like to guarantee that this protocol is called first for all
URLs (especially including file:// ) -- assuming no other protocols
are registered after mine. Can I assume that? That is, is it a last-
registered-first-asked algorithm, and can I depend on that?
Thanks,
Rudi
Details:
I'm working on a WebView in a sandbox where we want to control all
accesses to the file:// protocol. This includes files read by
Flash .swf files. I found from experimentation that when a WebView
loads a SWF file that itself is configured to read files from the
same directory as the SWF, then the resource-delegate is called for
the SWF file but not for the files that Flash itself is loading... so
simply having a resource delegate won't control files loaded by Flash
when the SWF file itself is file://
Further experimentation showed that for custom protocols, the
resource-delegate *is* called for the files that Flash itself is
loading.
So I'm implementing a custom protocol, and whenever we load a SWF
file we load it with our custom protocol scheme; my protocol knows
how to serve the swf file; in addition, my protocol is called with
the files loaded by the swf.
I'm worried that someone could create a malicious Flash file that
specifically loads the file:// protocol, and my protocol won't know
about that because some other protocol will load it first, and since
it's file:// my resource delegate won't know about it.
-- R
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