How to generate a file for download in a Google Chrome Extension?

Chrome doesn't provide any help with this, but I think you should be able to trigger a file save dialog using downloadify js library which uses a flash component behind the scenes.

Seems to crash Firefox for me when I try the demo. Chrome doesn't crash though...so, I guess I can live with that. – Mark Jan 23 at 17:43.

You can now use HTML5 File API to download a file. It is still in development, but you can use a BlobBuilder and redirect your use to download that file: var bb = new BlobBuilder(); bb. Append(csvContents); var blob = bb.getBlob(); location.

Href = window.webkitURL. CreateObjectURL(blob); For more information regarding the File API, HTML5Rocks has a great tutorial: http://www.html5rocks.com/tutorials/file/filesystem.

– Mark Jan 23 at 17:51 Yes, in Chrome 10 they changed it to be "window.webkitURL. CreateObjectURL". I edited my answer to reflect that.

The only problem with this approach (will get solved soon) is that you cannot control the filename. Try it out in your inspector. – Mohamed Mansour Jan 23 at 18:07 "Not allowed to load local resource: blob:null/6b2c341a-ad40-48b2-9755-1b7134832d39".

I can copy that into my address bar and download the file, but why won't Chrome allow it? – Mark Jan 23 at 18:21 For development, try adding the following command line argument to Chrome: --allow-file-access-from-files – Mohamed Mansour Jan 23 at 18:27 @Mohammed: Yeah, that works. Very close to being usable... but I think I need a save-as dialog.

– Mark Jan 23 at 18:32.

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