Citrix Systems 9.2 Redirecting a Working URI to a New Format

270 Citrix NetScaler Policy Configuration and Reference Guide
bind patset pat1 .html
bind patset pat1 .php
bind patset pat1 .asp
bind patset pat1 .cgi
add rewrite action act1 insert_after 'HTTP.REQ.URL.PATH'
'".html"'
add rewrite action act2 insert_after "HTTP.REQ.URL.PATH" '".php"'
add rewrite policy pol1 '!HTTP.REQ.URL.CONTAINS_ANY("pat1") &&
SYS.HTTP_CALLOUT(Call_html)' act1
add rewrite policy pol2 '!HTTP.REQ.URL.CONTAINS_ANY("pat1") &&
SYS.HTTP_CALLOUT(Call_php)' act2
bind rewrite global pol1 100 END
bind rewrite global pol2 101 END
Redirecting a Working URI to a New Format
Suppose that you have a set of working URLs that resemble the following:
/index.php?id=nnnn
To change these URLs to /nnnn and make sure that search engines update their
indexes to the new URI format, you need to do the following:
• Redirect the old URIs to the new ones so that search engines update their
indexes.
• Rewrite the new URI back to the old one so that the index.php script runs
correctly.
To accomplish this, you can insert marker code into the query string (making sure
that the marker code is not seen by visitors), and then removing the marker code
for the index.php script.
The following examples redirect from an old link to a new format only if a
marker is not present in the query string. The link that uses the new format is
re-written back to the old format, and a marker is added to the query string.
Apache mod_rewrite solution
RewriteCond %{QUERY_STRING} !marker
RewriteCond %{QUERY_STRING} id=([-a-zA-Z0-9_+]+)
RewriteRule ^/?index\.php$ %1? [R,L]
RewriteRule ^/?([-a-zA-Z0-9_+]+)$ index.php?marker&id=$1 [L]