Htaccess: добавить/удалить конечную косую черту из URL

Мой сайт запускает script → WSS wallpaper script

Моя проблема → Я пытаюсь принудительно удалить или добавить конечную косую черту в конец моего URL-адреса, чтобы предотвратить дублирование содержимого, а также очистить мои URL-адреса.

Я пробовал все виды и пробовал все, что я мог придумать, и загружал из межсетевых экранов, но пока такой удачи не было! Это может быть быстрым решением, но я смотрел на него так сильно, что, вероятно, слеп к чему-то мертвому.

Итак, я представляю вам весь код .htaccess:

DirectoryIndex index.php

RewriteEngine on
RewriteRule ^download/([0-9]+)?/([0-9]+)x([0-9]+)/([^/\.]+) image.php?id=$1&width=$2&height=$3&cropratio=$4&download=1 [L]
RewriteRule ^file/([0-9]+)?/([0-9]+)x([0-9]+)/([^/\.]+) image.php?id=$1&width=$2&height=$3&cropratio=$4 [L]
RewriteRule ^preview/([0-9]+)?/([0-9]+)x([0-9]+)/([^/\.]+) wallpaper_preview.php?id=$1&width=$2&height=$3&name=$4 [L]
RewriteRule ^thumbnail/([0-9]+)?/([0-9]+)x([0-9]+)/([^/\.]+)/([^/\.]+)/([^/\.]+)/([^/]+) image.php?wallpaper_id=$1&width=$2&height=$3&cropratio=$4&align=$5&valign=$6&file=$7 [L]
RewriteRule ^cat/([0-9]+)?/([^/\.]+)/p([0-9]+) index.php?task=category&id=$1&name=$2&page=$3 [L]
RewriteRule ^cat/([0-9]+)?/([^/\.]+)/([0-9a-zA-Z?-]+)/p([0-9]+) index.php?task=category&id=$1&name=$2&sortby=$3&page=$4 [L]
RewriteRule ^cat/([0-9]+)?/([^/\.]+)/([0-9a-zA-Z?-]+)-([0-9]+) index.php?task=category&id=$1&sortby=$3&page=$4 [L]
RewriteRule ^cat/([0-9]+)?/([^/\.]+) index.php?task=category&id=$1&name=$2 [L]
RewriteRule ^tag/([^/\.]+)/([0-9a-zA-Z?-]+)/([0-9]+) index.php?task=tag&t=$1&sortby=$2&page=$3 [L]
RewriteRule ^tag/([^/\.]+) index.php?task=tag&t=$1 [L]
RewriteRule ^profile/([0-9]+)?/([^/\.]+) index.php?task=profile&id=$1&name=$2 [L]
RewriteRule ^profile/comments/([0-9]+)?/([^/\.]+) index.php?task=users_comments&id=$1&name=$2 [L]
RewriteRule ^page/([0-9]+) index.php?task=view_page&id=$1 [L]  
RewriteRule ^register index.php?task=register [L] 
RewriteRule ^lost-password index.php?task=lost_pass [L] 
RewriteRule ^links index.php?task=links [L]
RewriteRule ^news/item/([0-9]+)/([^/\.]+) index.php?task=news&id=$1 [L]
RewriteRule ^news/page([0-9]+) index.php?task=news&page=$1 [L]
RewriteRule ^members/([^/\.]+)-([^/\.]+)/page([0-9]+)? index.php?task=member_list&sort=$1&order=$2&page=$3 [L]
RewriteRule ^members index.php?task=member_list [L]
RewriteRule ^messages index.php?task=messages [L]
RewriteRule ^submit index.php?task=submit [L]
RewriteRule ^search/([^/\.]+) index.php?task=search&q=$1 [L]
RewriteRule ^search index.php?task=search [L]
RewriteRule ^submit index.php?task=submit [L]
RewriteRule ^r-([0-9]+)?-([0-9]+)? go.php?id=$1&ref=$2 [L]
RewriteRule ^r-([0-9]+)? go.php?id=$1 [L]
RewriteRule ^([^/\.]+)/([0-9]+)/([^/\.]+) index.php?task=view&id=$2&name=$3 [L]
RewriteRule ^news/([^/\.]+) index.php?task=news&name=$1 [L]
RewriteRule ^profile/([^/\.]+) index.php?task=profile&name=$1 [L]
RewriteRule ^news index.php?task=news [L]
RewriteRule ^page/([^/\.]+) index.php?task=view_page&name=$1 [L]  
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/\.]+)/([0-9a-zA-Z'?-]+)/([0-9]+) index.php?task=category&name=$1&sortby=$2&page=$3 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/\.]+)/([^/\.]+) index.php?task=view&name=$2 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/\.]+) index.php?task=category&name=$1 [L]


## www reslove ##
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
## www reslove ##

## index reslove ##
Options +FollowSymLinks
RewriteCond %{THE_REQUEST} ^.*/index\.php
RewriteRule ^(.*)index.php$ http://www.epicwallpaper.net/$1 [R=301,L]
## index reslove ##

Ответы

RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [L,R] # <- for test, for prod use [L,R=301]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*[^/])$ /$1/ [L,R] # <- for test, for prod use [L,R=301]

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} (.+)/$
RewriteRule ^ %1 [R=301,L]

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} /(.*)/$
RewriteRule ^ /%1 [R=301,L] <-- added slash here too, don't forget it

Options +FollowSymLinks
RewriteEngine On
RewriteBase /
## hide .html extension
# To externally redirect /dir/foo.html to /dir/foo
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+).html
RewriteRule ^ %1 [R=301,L]

RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\s([^.]+)/\s
RewriteRule ^ %1 [R=301,L]

## To internally redirect /dir/foo to /dir/foo.html
RewriteCond %{REQUEST_FILENAME}.html -f
RewriteRule ^([^\.]+)$ $1.html [L]


<Files ~"^.*\.([Hh][Tt][Aa])">
order allow,deny
deny from all
satisfy all
</Files>

# redirect the main page to landing
##RedirectMatch 302 ^/$ /landing

# remove php ext from url
# https://stackoverflow.com/info/4026021/remove-php-extension-with-htaccess
RewriteEngine on 

# File exists but has a trailing slash
# https://stackoverflow.com/info/21417263/htaccess-add-remove-trailing-slash-from-url
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^/?(.*)/+$ /$1 [R=302,L,QSA]

# ok. It will still find the file but relative assets won't load
# e.g. page: /landing/  -> assets/js/main.js/main
# that we have the rules above.
RewriteCond %{REQUEST_FILENAME} !\.php
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f 
RewriteRule ^/?(.*?)/?$ $1.php