.htaccess specific version

.htaccess

# Use case (mine) : 
# You're deploying a new version of a website on client's hosting.
# Of course, the previous website is in the root directory...
# You want your v2/ directory to be visible only for you and the client
# And the client (and perhaps you) doesn't have a static IP...
#
# In this case, I've decided to use a cookie.
# But, how may I set a cookie in the clients browser ?
# What if she wants to browser thi shinny new website with her smartphone or tablet ???
# What if she wants to show it to her team or even family ???
#
# Here's my solution to this problem :
#
# Usage :
# To set the cookie to use the /v2 directory, visit : www.mydomainname.com/__set/v2
# To see back the original version, set a directory that doesn't exist : www.mydomainname/__set/whatever
#
# The code :

RewriteEngine on

#Setting a specific version
RewriteRule __set/(.+)$ / [L,R=302,CO=dversion:$1:%{HTTP_HOST}:1440]

#Using a specific version based on the cookie previously set
RewriteCond %{HTTP:Cookie}  [^|;\s]*dversion=(v[^|;\s]*)
RewriteCond %{DOCUMENT_ROOT}%1 -d
RewriteCond %{REQUEST_URI} !^/%1.*
RewriteRule ^(.*)$ %1/$1 [L,QSA]