|Just another Perl shrine|
Ultimate anti-leech, anti-proxy, anti-bot, CAPTCHA works, link does not (code included)by taint (Chaplain)
|on Apr 19, 2013 at 18:28 UTC||Need Help??|
taint has asked for the
wisdom of the Perl Monks concerning the following question:
Greetings fellow perl lovers,
I host a fair number of larger files.
They are meant for those who actually want to use them --
not to "enhance" someone else' web page, or end up being
downloaded 50 times/day by every BOT known to the internet.
So, I've been on what seems an endless quest to find the
Ultimate ant-leech, anti-hotlink, ant-bot, anti-proxy (google
proxies, and even manipulates the results, in some cases --
PDF, for example).
Well, I've built/tried download scripts that hide the source location.
Those that prevent anti-leeching (easy to fool), and what seems
a myrid of other possible solutions.
But sadly, none completely fit the bill.
So last night I performed a search here at perlmonks
using the string CAPTCHA. I finally landed what looked like
it might be a great starting point to build the ultimate solution.
The monks thread I'm referring to is here.
The code I chose, was from an external link suggested by a fellow monk in that thread.
I made a few modifications, and "ran it up the flag pole" to see how it
would fly. The CAPTCHA && session routine(s) worked flawlessly.
My modification(s) aslo seemed to work -- save one; the link
to the file was produced, but when clicked, returns the files' source
(it's a bzip2(1) archive). Among other modules, it uses the CGI(3)
(CGI.pm) perl module. My guess is I need to post a header/content-type,
rather than a <a href which isn't what I was hoping for.
Here's the source I'm using:
While I could modify it to post a header of:
or an HTTP 301, via Location:
or some such thing. But this isn't quite what I'd hoped for.
I think this script is an ideal start for an ultimate solution.
I think this could/would be perfect, if I could create a temporary symlink(2)
to the actual file, much as the session image is created for the CAPTCHA.
Is this possible? Any ideas how to do it?
Thank you for all your time and consideration.
#!/usr/bin/perl -Tw use perl::always; my $perl_version = "5.12.4"; print $perl_version;