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From: "Christoph M. Becker" <cmbecker69@arcor.de>
Newsgroups: comp.lang.javascript
Subject: Re: onclick and <a> tag question
Date: Thu, 19 Mar 2015 21:29:12 +0100
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Mel Smith wrote:

> Christoph said:
>> Well, it pretty much appears that those "abusers" are actually download
>> managers.  If the web server is able to deliver partial content, I
>> wouldn't worry about those, because they won't increase the overall
>> bandwidth considerably.
> 
> But it still bugs me !

If you really want to prohibit the usage of download managers, you
should do this server side.  So don't give a direct download link to the
file resource, but instead to a script that will pass the file contents
through.  Signal the client that range requests are not supported by
sending Accept-Ranges: none, and respond with an appropriate 4xx status
code, if a Range header field is contained in the request.

However, this would be OT for this newsgroup, if you won't use a server
side ECMAScript implementation to do it.

-- 
Christoph M. Becker