Use the Content-Disposition metadata

To override the default behavior for a browser, use the Content-Disposition header to specify the override behavior and assign this header to an object. For example, this header might specify that the browser use a download program to save this file rather than show the file, which is the default.

Example Override browser default behavior request: HTTP

This example assigns an attachment type to the Content-Disposition header. This attachment type indicates that the file is to be downloaded as goodbye.txt:

# curl -i  $publicURL/marktwain/goodbye -X POST -H "X-Auth-Token: $token" -H "Content-Length: 14" -H "Content-Type: application/octet-stream" -H "Content-Disposition: attachment; filename=goodbye.txt"
HTTP/1.1 202 Accepted
Content-Length: 76
Content-Type: text/html; charset=UTF-8
X-Trans-Id: txa9b5e57d7f354d7ea9f57-0052e17e13
X-Openstack-Request-Id: txa9b5e57d7f354d7ea9f57-0052e17e13
Date: Thu, 23 Jan 2014 20:39:47 GMT

<html><h1>Accepted</h1><p>The request is accepted for processing.</p></html>