Docs ModTriggerBeforeDownload » History » Revision 12
Revision 11 (Shtirlic, 2012-08-11 10:42) → Revision 12/13 (gstrauss, 2016-07-17 04:19)
h1. Trigger before Download
{{>toc}}
*Module mod_trigger_b4_dl*
h2. Description
Anti Hotlinking:
* if user requests "download-url" directly, the request is denied and he is redirected to "deny-url"
* if user visits "trigger-url" before requesting "download-url", access is granted
* if user visits "download-url" again after "trigger-timeout" has elapsed, the request is denied and he is redirected to "deny-url"
The trigger information is either stored locally in a gdbm file or remotely in memcached.
h2. Requirements
* libpcre
* libgdbm or libmemcached libmemcache (install the C client API,visit http://people.freebsd.org/~seanc/libmemcache/ and http://danga.com/memcached/apis.bml for detail.)
h2. Example config
<pre>
trigger-before-download.gdbm-filename = "/home/weigon/testbase/trigger.db"
trigger-before-download.memcache-hosts = ( "127.0.0.1:11211" )
trigger-before-download.trigger-url = "^/trigger/"
trigger-before-download.download-url = "^/download/"
trigger-before-download.deny-url = "http://192.168.1.5:1025/index.html"
trigger-before-download.trigger-timeout = 10
</pre>
If both @trigger-before-download.gdbm-filename@ and @trigger-before-download.memcache-hosts@ is set gdbm will take precedence.
h2. Installation
memcached should be started with the option -M as we don't want to remove entry if the memory is full.