how to download binary file in jsp

[bappa]

Hi i am trying to download binary file by a jsp file but it is showing the content (not all) on the browser. I want to save that file automatically to the client machine in a specified location. Please help.

[Ulf Dittmer]

JSPs aren't meant for streaming binary content (and for all practical purposes, they can't). Use a servlet instead.

[bappa]

then how to do it by servlet. please let me know... Give one sample code.

[Ulf Dittmer]

An example can be found under "Simple Stream" in the Code Barn.

[Kishore Dandu]

Originally posted by Ulf Dittmer:
An example can be found under "Simple Stream" in the Code Barn.

How do we render the images, if i try to invoke the servlet directly it gives:"The following image files are located under the WEB-INF directory and, thus, can not be seen with a browser unless streamed through the StreamServlet: "

[Bear Bibeault]

Exactly what that says. Any resources under WEB-INF are not directly accessible by URL.

[Kishore Dandu]

Originally posted by Bear Bibeault:
Exactly what that says. Any resources under WEB-INF are not directly accessible by URL.

Does that mean this example is just to show how to disallow stream of an image as compared to 'how to show a stream through a servlet?'

[Bear Bibeault]

The example shows how to stream a resource through a servlet. This is useful for not only controlling access to resources hidden under WEB-INF from direct access, but for controlling the response headers so that the download acts in ways that you want.