Investigating your described method, it seems jar/zip files do not
contain individual file's added/created, modified etc dates? For a
chrome file located in a jar file, nsIZipEntry would have to be used,
however the zip entry interface has no date properties or methods.

Am I correct?
Thanks,
James

James Newell wrote:
> Thanks I'll give that a go. I am using it to check that the user's date
> has not been set back in time.
>
> Benjamin Smedberg wrote:
> > James Newell wrote:
> > > Hi,
> > > Is there any way to retrieve the last modified date of a chrome file
> > > (not neccessarily js) that may be in a jar or on the file system. Does
> > > chrome support anything like http headers that it could be retrieved
> > > from?
> >
> > It's not readily supported, but you could hack it.
> > nsIChromeRegistry.convertChromeURL will convert a chrome URI into its
> > underlying URI. You can typically then QI this URI to nsIFileURL or
> > nsIJARURI and get the information you need from that. But as you can see,
> > that's a little hacky.
> >
> > What in particular are you trying to do that you need to get the
> > last-modified date of chrome?
> >
> > --BDS
> > 
> > Followups to the better newsgroup mozilla.dev.tech.network

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