# Is manual file caching possible in as3 from the browser?

**URL:** <https://forum.kirupa.com/t/is-manual-file-caching-possible-in-as3-from-the-browser/313803>\
**Category:** Uncategorized\
**Created:** [September 10, 2010, 4:43am UTC](https://forum.kirupa.com/t/is-manual-file-caching-possible-in-as3-from-the-browser/313803 "2010-09-10T04:43:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![user\_name1](https://avatars.discourse-cdn.com/v4/letter/u/e8c25b/32.png) [@user\_name1](https://forum.kirupa.com/u/user_name1)\
**Post date:** [September 10, 2010, 4:43am UTC](https://forum.kirupa.com/t/is-manual-file-caching-possible-in-as3-from-the-browser/313803/1 "2010-09-10T04:43:54Z")

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Hi,

I am downloading large files in the browser using a swf coded in as3 that makes byte range http requests (using [http://code.google.com/p/as3httpclientlib/](http://code.google.com/p/as3httpclientlib/)). This lets me download the files in chunks. Is it possible to manually cache the file byte ranges to the browser cache so that I can prevent wasting bandwidth if the client has already downloaded a portion of the file on the next visit? This would essentially be a “resume download” feature.

From what I can find on adobe livedocs, flash player will not allow this because of security issues. I just wanted to double check and see if anyone knew a way to do this before I gave up on the idea.

Thanks