Trigger before Download

Module: mod_trigger_b4_dl

Table of Contents

• Description
  • Requirements
• Options
• Installation

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.

Requirements

• libpcre
• libgdbm or libmemcache (install the C client API,visit http://people.freebsd.org/~seanc/libmemcache/ and http://danga.com/memcached/apis.bml for detail.)

Options

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

If both trigger-before-download.gdbm-filename and trigger-before-download.memcache-hosts is set gdbm will take precedence.

Installation

memcached should be started with the option -M as we don't want to remove entry if the memory is full.