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RE: Accessing files in QT Cache
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RE: Accessing files in QT Cache


  • Subject: RE: Accessing files in QT Cache
  • From: Matt <email@hidden>
  • Date: Wed, 27 Dec 2006 16:03:14 -0500

There isn't any useful movie data stored in my apps cache folder.

I grabbed an NSMovieView from the first object in the array returned from -subviews and this looks like this will get me on my way. I'm reading through how to get a savable QTMovie or the like out of the view so I can write that to a file.

This still doesn't give me access to the cache, which would be a lot more practical in the long run, but thanks for the help and giving me another place to look.

Matt


On Dec 27, 2006, at 2:48 PM, douglas a. welton wrote:

Hi Matt,

Two things:

1) Did you take a look in ~/Library/Caches/your-application-name to see if you had a movie laying around there?

2) Have you checked to see if one of the -subviews of the - documentView of the -frameView of the mainFrame of your WebView is a QTMovieView or something like that? In other word are any of the views in

	[[[[[Web_View mainFrame] frameView] documentView]  subviews]

responsible for drawing the movie? If so, you should be able to get the movie to save from there.

later,

douglas

On Dec 27, 2006, at 2:11 PM, Matt wrote:
I've read more documentation and searched through past mailing lists than I ever cared to do trying to find answers on this one.....

I would simply like to be able to have direct access to a movie file when played in a webview. I would like to be able to save this file, but i can't figure out how to access it.

I have tried grabbing the data from the the webFrame (I'm using a WebView from WebKit), but I only ever get a few kilobytes worth of data. I have tried web archives and a few other different ways of accessing the data. I can get a valid HTML document saved, but that doesn't give me the video that I'm trying to access.

Since none of that worked I thought the problem must lie in either the WebKit or QuickTime caches. My application's cache has "cached" instances of all the URLRequests, but those are only about 4kb in size, not a real movie file. (I determined this by changing the directory in the sample application "/Developer/ Examples/WebKit/DiskCacheInspector" and viewing the cache objects that way). Safari's cache didn't hold any relevant information, so I assumed the data was being cached by the QuickTime plugin and stored in that cache. This seems to be the case as the "~/Library/ Caches/QuickTime/downloads/" directory is much larger in size than my other caches, which are a usually less than 1mb total.

I read up on NSCachedURLResponse, NSURLCache, etc, but I'm not sure if that really applies to the ".qtch" files that are in this cache folder. I'm not able to access them. Ideally I would like to be able to look in the webkit maintained history and if the URL is in that list, search for the corresponding cached object in QT's cache, being able to retrieve data from that object and save for later if needed.

Does anyone have any suggestions?

Thanks,

Matt
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