Apache: RewriteRule导致分段故障

Question

我使用RewriteRule将URL中的所有空格(又名%20)替换为下划线：

RewriteRule (.*)[\ ](.*) $1_$2 [N]

N标志再次启动重写过程，直到没有空间(希望如此)。现在，当另一边有一个文件在等待，即请求时，一切都很好：

/This is an example.html

和档案：

This_is_an_example.html

但是，当没有匹配的文件时，Apache退出时会出现500个内部错误。错误日志声明一个分段错误，重写日志显示重写引擎试图重定向到的疯狂状态。

/This is an_example.html/This is an_example.html/This is an_example.html/...

以此类推，直到分段错误(注意，最后一个空格被转换，但没有其他)。

有谁想过，为什么RewriteRule在处理现有文件时失败得如此糟糕？

更新:只有在请求的URI中存在额外的"/“时才会发生分段错误，如

/virtual-directory/This is an example.html

更新2:该语句中没有RewriteCond。在我看来，它应该在没有。问题是为什么不。Htaccess：

RewriteEngine On
RewriteBase /test/

RewriteRule (.*)[\ ](.*) $1_$2 [N]

更新3:所讨论的.htaccess文件：

AddType application/xhtml+xml .xhtml
AddEncoding x-gzip .gz

ExpiresActive On
ExpiresByType application/xhtml+xml "access plus 1 year"

ErrorDocument 404 /test/index.php?error=404

RewriteEngine On

RewriteBase /test/

# replace spaces with underscores
RewriteCond %{REQUEST_FILENAME} .*[\ ].*
RewriteRule (.*)[\ ](.*) $1_$2 [N]

# the index.php
RewriteRule ^index.php - [L]

# language tag
RewriteRule ^([a-z]{2})$ index.php?lang=$1&url= [L,QSA]
RewriteRule ^$ en [R=301,L]

# add .xhtml
RewriteCond %{REQUEST_FILENAME}.xhtml -s [OR]
RewriteCond %{REQUEST_FILENAME}.xhtml.gz -s
RewriteRule ^(.+) $1.xhtml

# add .gz
RewriteCond %{HTTP:Accept-Encoding} .*gzip.*
RewriteCond %{REQUEST_FILENAME}.gz -s
RewriteRule ^(.+) $1.gz

# send correct mime type
#RewriteCond %{REQUEST_FILENAME} -s
RewriteRule \.xhtml\.gz$  - [L,T=application/xhtml+xml]

rewriteLog语句太大，无法粘贴。一个请求将13 of的数据填充到文件中。这是摘要：

(IP) - - [date] [host] (3) [perdir /htdocs/test/] add path info postfix: /htdocs/test/de -> /htdocs/test/de/This is a test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] strip per-dir prefix: /htdocs/test/de/This is a test -> de/This is a test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] applying pattern '(.*)[\ ](.*)' to uri 'de/This is a test'
(IP) - - [date] [host] (2) [perdir /htdocs/test/] rewrite 'de/This is a test' -> 'de/This is a_test'
(IP) - - [date] [host] (3) [perdir /htdocs/test/] add per-dir prefix: de/This is a_test -> /htdocs/test/de/This is a_test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] add path info postfix: /htdocs/test/de/This is a_test -> /htdocs/test/de/This is a_test/This is a test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] strip per-dir prefix: /htdocs/test/de/This is a_test/This is a test -> de/This is a_test/This is a test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] applying pattern '(.*)[\ ](.*)' to uri 'de/This is a_test/This is a test'
(IP) - - [date] [host] (2) [perdir /htdocs/test/] rewrite 'de/This is a_test/This is a test' -> 'de/This is a_test/This is a_test'
(IP) - - [date] [host] (3) [perdir /htdocs/test/] add per-dir prefix: de/This is a_test/This is a_test -> /htdocs/test/de/This is a_test/This is a_test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] add path info postfix: /htdocs/test/de/This is a_test/This is a_test -> /htdocs/test/de/This is a_test/This is a_test/This is a test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] strip per-dir prefix: /htdocs/test/de/This is a_test/This is a_test/This is a test -> de/This is a_test/This is a_test/This is a test
(IP) - - [date] [host] (3) [perdir /htdocs/test/] applying pattern '(.*)[\ ](.*)' to uri 'de/This is a_test/This is a_test/This is a test'
(IP) - - [date] [host] (2) [perdir /htdocs/test/] rewrite 'de/This is a_test/This is a_test/This is a test' -> 'de/This is a_test/This is a_test/This is a_test'
(IP) - - [date] [host] (3) [perdir /htdocs/test/] add per-dir prefix: de/This is a_test/This is a_test/This is a_test -> /htdocs/test/de/This is a_test/This is a_test/This is a_test
... and so on ad infinitum

坏蛋是第6行：“添加路径信息后缀”。

Answer 1

更新

看看你的更新3(很有帮助，谢谢)，我又想到了两个点子：

1. 有一个apache问题：https://issues.apache.org/bugzilla/show_bug.cgi?id=38642，它看起来与您的类似。这是固定在2.2.12和RewriteRule标志的引入。尝试将此标志添加到您的RewriteRule中： RewriteRule (.*)\ $1_$2 N，DPI 看看能不能解决这个问题。需要apache 2.2.12。
2. 您是否碰巧启用了目录 DirectorySlashOn？试着禁用它。

更新端

你的设置：

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} .*[\ ].*
RewriteRule (.*)[\ ](.*) $1_$2 [N]

为我工作(http://localhost/test/This is an example.html，重写VirtualHost配置中的规则，Apache2.2.14)。这是我的RewriteLog (使用RewriteLogLevel 2)：

init rewrite engine with requested uri /test/This is an example.html
rewrite '/test/This is an example.html' -> '/test/This is an_example.html'
rewrite '/test/This is an_example.html' -> '/test/This is_an_example.html'
rewrite '/test/This is_an_example.html' -> '/test/This_is_an_example.html'
local path result: /test/This_is_an_example.html
prefixed with document_root to D:/var/www/test/This_is_an_example.html
go-ahead with D:/var/www/test/This_is_an_example.html [OK]

当D:/var/www/test/This_is_an_example.html不存在时，我得到一个404 -但没有分段错误。

你能把你的RewriteLog贴出来吗？你把重写规则放哪儿了？变成.htaccess？你有什么指令(AliasMatch等)吗？在你的网址上也有用吗？

Answer 2

尝试一个绝对的替代：

RewriteRule ^([^\ ]*)\ (.*) /$1_$2 [N]

Answer 3

总的来说，如果提供了一个可重复的测试用例，Apache开发人员将非常认真地对待httpd中的SIGSEGV。如果附加调试器并捕获回溯跟踪，情况就更糟了。