问题
I need to let the user to download a file created on the fly from some data contained in the extension, but I don't want to do this server-side.
As a real-world example : There is a variable containing the text "hello world". I want the user to be able to download/create a .TXT file containing such text.
Is it possible ?
-edited Oct 30, 2010-
Solutions so far:
window.saveAs - not working at all
createObjectURL - works, but the filename and other options can't be customized yet
copy data to clipboard - works, but too many steps are required to the user
create a GoogleDocs document - could work, but needs messing with the API and Oauth
-edited Apr 15, 2011
Looks like things are improving: https://github.com/eligrey/FileSaver.js
But Chrome 14+ is still a bit weird about filenames.
回答1:
I think the only way is to call save dialog through flash, see Downloadify library.
回答2:
In the Chromium-extensions Google Group I have found this working example: (I have modified it to work from the pop-up)
BuiltBlob = new BlobBuilder("");
BuiltBlob.append("Hello, world");
BlobToSave = BuiltBlob.getBlob();
chrome.tabs.create({'url': createObjectURL(BlobToSave), 'selected': false});
But the filename is not set, ending with something like cf8a56bf-d724-4b97-b10f-e252961135bd
On the The W3C docs ( http://dev.w3.org/2009/dap/file-system/file-writer.html ) I've found this not working example:
var bb = new BlobBuilder();
bb.append("Lorem ipsum");
var fileSaver = window.saveAs(bb.getBlob(), "test_file");
fileSaver.onwriteend = myOnWriteEnd;
but window.saveAs doesn't appear to exists.
Googleing around I've found outdated Google Gears references, but nothing else, maybe because I'm dealing with something too new to have proper documentation ?
Is there a way to set the filename/mime-type to the first example?
回答3:
I don't think this is possible because of safety reasons
来源：https://stackoverflow.com/questions/4003352/chrome-extension-download-export-content-created-on-the-fly