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--- litespeed_wiki:config:multiviews [2015/07/24 15:43]
Michael Alegre created
+++ litespeed_wiki:config:multiviews [2018/09/12 20:53]
Jackson Zhang
@@ Line 1: / Line 1: @@
 ====== How to enable Multiviews ======
-MultiViews is an Apache per-directory option, which is not naively supported by LiteSpeed web server at the time of this writing. However it can be achieved through rewrite rule.
+MultiViews is an Apache per-directory option, which is not natively supported by LiteSpeed web server at the time of this writing. However, it can be achieved through the rewrite rules.
+===== What's Apache Multiviews =====
+The effect of MultiViews is as follows: if the server receives a request for /some/dir/foo, if /some/dir has MultiViews enabled, and /some/dir/foo does not exist, then the server reads the directory looking for files named foo.*, and effectively fakes up a type map which names all those files, assigning them the same media types and content-encodings it would have if the client had asked for one of them by name. It then chooses the best match to the client's requirements.
+MultiViews may sometimes cause very strange rewrite problem. When you turn on rewrite log, you might see something like the following. It indicates "MultiViews" is enabled.
+  [perdir /var/www/] add path info postfix: /var/www/product.php -> /var/www/product.php/Test__Test.php
+  [perdir /var/www/] strip per-dir prefix: /var/www/product.php/Test__Test.php -> product.php/Test__Test.php
+  [perdir /var/www/] applying pattern '^([0-9]+)/([^/]+)\.php$' to uri 'product.php/Test__Test.php'
+  [perdir /var/www/] add path info postfix: /var/www/product.php -> /var/www/product.php/Test__Test.php
+  [perdir /var/www/] strip per-dir prefix: /var/www/product.php/Test__Test.php -> product.php/Test__Test.php
+  [perdir /var/www/] applying pattern '^prodotto/([^/]+)\.php$' to uri 'product.php/Test__Test.php'
+  [perdir /var/www/] add path info postfix: /var/www/product.php -> /var/www/product.php/Test__Test.php
+  [perdir /var/www/] strip per-dir prefix: /var/www/product.php/Test__Test.php -> product.php/Test__Test.php
+  [perdir /var/www/] applying pattern '^prodotto/([^/]+)\.php?id=([0-9]+)$' to uri 'product.php/Test__Test.php'
+  [perdir /var/www/] add path info postfix: /var/www/product.php -> /var/www/product.php/Test__Test.php
+  [perdir /var/www/] strip per-dir prefix: /var/www/product.php/Test__Test.php -> product.php/Test__Test.php
+  [perdir /var/www/] applying pattern '^c/([^/]+)/([^/]+)\.php$' to uri 'product.php/Test__Test.php'
+  [perdir /var/www/] pass through /var/www/product.php
+The problem was that the request was being modified by MultiViews, substituting /product/ with /product.php and never triggering the mod_rewrite rule.
+Generally we don't recommend to use MultiViews function to avoid such confistion.
+===== Example 1 in real life when URI using pathinfo =====
+Our customer is using an old jshop which works on Apache. After switch to LSWS, it always redirect to the homepage. It has a very very long rewrite in .htaccess hence it is not easy to identify where is wrong.
+Enable rewrite log for Apache and LSWS, but it still not easy to identify the problem.
+The following is from Apache rewrite log:
+  [Wed Sep 12 05:46:58.807252 2018] [rewrite:trace3] [pid 679517:tid 140344885401344] mod_rewrite.c(483): [client 175.156.215.157:58596] 175.156.215.157 - - [www.example.com/sid#7fa4b3f8b5d8][rid#7fa460006a60/initial] [perdir /home/user1/public_html/] add path info postfix: /home/user1/public_html/s.php -> /home/user1/public_html/s.php/2/menus-reading-michelin-star-restaurant-berkshire, referer: https://www.example.com/
+  [Wed Sep 12 05:46:58.807300 2018] [rewrite:trace3] [pid 679517:tid 140344885401344] mod_rewrite.c(483): [client 175.156.215.157:58596] 175.156.215.157 - - [www.lortolan.com/sid#7fa4b3f8b5d8][rid#7fa460006a60/initial] [perdir /home/user1/public_html/] strip per-dir prefix: /home/user1/public_html/s.php/2/menus-reading-michelin-star-restaurant-berkshire -> s.php/2/menus-reading-michelin-star-restaurant-berkshire, referer: https://www.example.com/
+As far as the following MultiViews option disabled in .htaccess, Apache won't work anymore.
+  Options +MultiViews
+It can be determined that MultiViews is the root cause for the rewrite problem.
+Why Apache works but LSWS doesn't? Apache supports the above MultiViews while LSWS does not. How to make MultiViews work on LSWS?
+If a site has a URI that uses PATHINFO, here's how the redirection should work:
+  /topic/Office/Work ==> /topic.php/Office/Work
+  /update/Office/Work ==> /update.php/Office/Work/topic-> /topic.php
+The following is a code example to implement Multiviews that uses PATHINFO through rewrite rules for LSWS:
+  # Multiviews example code...use this in a .htaccess file
+  RewriteEngine On
+  RewriteCond %{REQUEST_URI} !.+php*
+  RewriteCond %{DOCUMENT_ROOT}/$1\.php -f
+  RewriteRule ^([^/]+)/?(.*)$ $1.php/$2 [L]
+As far as the above code added, LSWS works fine now for this particular site.
+===== Example 2 =====
 For example: