内部mod_rewrite导致无限重定向

Question

我在mysubdomain.ngrok.com上有一个服务器，我已经通过一个名为ngrok的隧道软件向它发送了请求，所以现在要设置mod_rewrite策略来映射和服务来自 localhost:8080 到的任何请求，而不需要重定向浏览器。

# Turn on rewrites
RewriteEngine on
###
## Rules for "mysubdomain.ngrok.com"
###
RewriteCond %{HTTP_HOST} ^mysubdomain.ngrok.com$
RewriteRule .? %{REQUEST_URI} [L]
###
## Rules for "localhost:8080"
###
RewriteCond %{HTTP_HOST} ^localhost:8080$
RewriteRule . - [E=REWRITEBASE:/prestashop/]
RewriteRule ^api/?(.*)$ %{ENV:REWRITEBASE}webservice/dispatcher.php?url=$1 [QSA,L]

但是我最终进入了无限重定向循环！--的最佳避免方法是什么，实现了我的目标

[/initial] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] add path info postfix: /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api -> /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api/products
[/initial] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] strip per-dir prefix: /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api/products -> api/products
[/initial] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] applying pattern '.?' to uri 'api/products'
[/initial] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] RewriteCond: input='mysubdomain.ngrok.com' pattern='^mysubdomain.ngrok.com$' => matched
[/initial] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] rewrite 'api/products' -> '/prestashop/api/products'
[/initial] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] internal redirect with /prestashop/api/products [INTERNAL REDIRECT]
[/initial/redir#1] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] add path info postfix: /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api -> /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api/products
[/initial/redir#1] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] strip per-dir prefix: /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api/products -> api/products
[/initial/redir#1] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] applying pattern '.?' to uri 'api/products'
[/initial/redir#1] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] RewriteCond: input='mysubdomain.ngrok.com' pattern='^mysubdomain.ngrok.com$' => matched
[/initial/redir#1] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] rewrite 'api/products' -> '/prestashop/api/products'
[/initial/redir#1] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] internal redirect with /prestashop/api/products [INTERNAL REDIRECT]
...
[/initial/redir#10] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] add path info postfix: /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api -> /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api/products
[/initial/redir#10] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] strip per-dir prefix: /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/api/products -> api/products
[/initial/redir#10] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] applying pattern '.?' to uri 'api/products'
[/initial/redir#10] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] RewriteCond: input='mysubdomain.ngrok.com' pattern='^mysubdomain.ngrok.com$' => matched
[/initial/redir#10] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] rewrite 'api/products' -> '/prestashop/api/products'
[/initial/redir#10] [perdir /Users/root/dev/bitnami-ps1/apps/prestashop/htdocs/] internal redirect with /prestashop/api/products [INTERNAL REDIRECT]

Answer 1

查看日志和规则，我可以看到这个规则导致无限循环：

RewriteCond %{HTTP_HOST} ^mysubdomain.ngrok.com$
RewriteRule .? %{REQUEST_URI} [L]

，因为它是无条件地为domain=mysubdomain.ngrok.com将URI写入自身。

只要把它注释掉，循环就会被修复。