RewriteEngine on

RewriteOptions AllowNoSlash

# parse dotpath in the query string

RewriteCond %{QUERY_STRING} ^(?!&).+$

RewriteCond %{REQUEST_URI} ^(.*?)(?:/index(?:\.\w+)?)?$

RewriteRule ^.*$ /dotpath%1 [discardpath,noescape,last]

# don't rewrite existing paths

RewriteCond %{REQUEST_FILENAME} -d [ornext]

RewriteCond %{REQUEST_FILENAME} -f

RewriteRule ^(?!/).+$ - [discardpath,noescape,last]

# handle DirectoryIndex subrequests

RewriteRule ^index$() $1 [discardpath,noescape]

# dir without trailing / is provided as an absolute filesystem path

RewriteCond $0 ^/ [ornext]

RewriteCond ?&$0 ^(.*)$

RewriteRule ^.+$ http://tnrs.iplantcollaborative.org/instructions.html%1#download_results [discardpath,noescape,last]