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I have a Java applet embedded into a web page which generates a file that the user must download. I understand there is a way to do this by communicating with a Javascript API.
Could somebody please explain to me how to do it this particular way?
Javascript doesn’t allow file saving just yet, and the hacks that “work” need modern browser that understands data URI:s. In that case you would simply send the binary data as base64 and make the browser navigate to the data URI by setting
document.location.href = 'data:application/octet-stream...'The download prompt would look like this in firefox:http://img824.imageshack.us/img824/5080/octetstream.png
Flash allows for real download/save dialogs though so you could also look into that… or find out if java applets have that too.