过去几天我的网站放慢了一点。我查看了我的错误日志，发现了很多这些：
[Mon Sep 30 00:09:53 2013] [error] [client 66.249.66.205] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
[Mon Sep 30 00:09:53 2013] [debug] core.c(3120): [client 66.249.66.205] r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php
[Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /images/2013/02/600x376_0.076827001313237200_pixnaz_ir_1.jpg
如何找到导致此问题的原因？
它似乎是一个围绕index.php的循环，除了最后一个是一个图像，很可能是在我的一个页面（而不是索引）中链接。
我正在使用codeigniter，这是一个mvc框架，所有内容都通过index.php文件，因此有点难以理解它出错的地方。
显然它与.htaccess有关（在几个博客中已经提到过。）
这是我的.htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
#Removes access to the system folder by users.
#Additionally this will allow you to create a System.php controller,
#previously this would not have been possible.
#'system' can be replaced if you have renamed your system folder.
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ index.php?/$1 [L]
#When your application folder isn't in the system folder
#This snippet prevents user access to the application folder
#Submitted by: Fabdrol
#Rename 'application' to your applications folder name.
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ index.php?/$1 [L]
#Checks to see if the user is attempting to access a valid file,
#such as an image or css document, if this isn't true it sends the
#request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
<IfModule !mod_rewrite.c>
# If we don't have mod_rewrite installed, all 404's
# can be sent to index.php, and everything works as normal.
# Submitted by: ElliotHaughin
ErrorDocument 404 index.php
</IfModule>
AddType image/x-windows-bmp bmp
我对.htaccess进行了一些更改（基本上我已经删除了最后一个块之前的顶级条件），现在我明白了：
[Wed Oct 02 00:10:07 2013] [error] [client 66.249.74.60] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
[Wed Oct 02 00:10:07 2013] [debug] core.c(3120): [client 66.249.74.60] r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
[Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg
现在似乎混合中有img目录，但我根本没有该目录。曾经有一个子域，我用它来用这个地址的图像。
img.mysite.com => mysite.com/files/images/
由于一些缓慢和并发症，我不再使用它了。现在我只使用真实的图像路径。
为什么我在循环中获得此子域名？我没有权限配置此服务器的人。可能是他做过的配置/设置吗？
答案 0 :(得分：48)
要防止无限循环，请在规则之上添加额外的RewriteCond行，如下所示：
RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
RewriteCond %{ENV:REDIRECT_STATUS} ^$通过检查首次成功进行内部重定向后设置为200的内部mod_rewrite变量REDIRECT_STATUS来阻止循环。
答案 1 :(得分：4)
最后一个街区：
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
最有可能反复重新注入已更改的请求URI，这可能会导致此类内部重定向错误。检查启用了调试级别的错误日志以跟踪每个重定向步骤，它会使事情更加明显，并会准确地告诉您哪些重定向规则正在触发它。
有关详细说明以及如何防止再次注射，请参阅：
solution outlined there实际上也应该在你的情况下这样做。它几乎相同，即使文件名相同。
答案 2 :(得分：3)
期待您的htaccess我看到您使用它从您的网址中删除了index.php，但您错过了RewriteBase，您可以在RewriteEngine On之后直接添加它：
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
#Removes access to the system folder by users.
#Additionally this will allow you to create a System.php controller,
#previously this would not have been possible.
#'system' can be replaced if you have renamed your system folder.
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
#When your application folder isn't in the system folder
#This snippet prevents user access to the application folder
#Submitted by: Fabdrol
#Rename 'application' to your applications folder name.
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
#Checks to see if the user is attempting to access a valid file,
#such as an image or css document, if this isn't true it sends the
#request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
<IfModule !mod_rewrite.c>
# If we don't have mod_rewrite installed, all 404's
# can be sent to index.php, and everything works as normal.
# Submitted by: ElliotHaughin
ErrorDocument 404 /index.php
</IfModule>
AddType image/x-windows-bmp bmp
因此，如果您的应用程序/网站不在RewriteBase /，subdomain将有效。但是，如果是，则可能需要在/符号后面添加文件夹名称。
答案 3 :(得分：1)
也许它是一个dummie awnser，但我只是清空我的.htaccess并再次配置永久链接。一切都在那之后起作用。
答案 4 :(得分：1)
您也可以使用END flag代替L标志：
RewriteRule ^(.*)$ index.php?/$1 [END]
使用[END]标志不仅终止当前轮次的重写处理（如[L]），还会阻止在每个目录（htaccess）上下文中发生任何后续重写处理。
这不适用于外部重定向产生的新请求。
答案 5 :(得分：0)
当loglevel调试时，我在Apache中遇到了一些性能问题...回到错误模式加速请求
答案 6 :(得分：0)
我注释了drupal根文件夹中存在的.htaccess文件中的“ RewriteBase / drupal”。它对我有用。