奇怪的 apache mod_rewrite 行为

Question 1

事实证明，有两个原因导致了此错误。首先是 AllowEncodedSlashes 的默认值，来自文档：

With the default value, Off, URLs which contain encoded path separators (%2F for / and additionally %5C for \ on according systems) are refused with a 404 (Not found) error.

我通过打开 Apache 日志中的最大详细程度发现了这一点，并发现了以下内容：

[Mon Mar 10 04:53:43 2014] [info] [client 172.17.1.49] found %2f (encoded '/') in URI (decoded='//'), returning 404

因此，我所有带有 %2F 的请求都被拒绝了。此外，我的服务器默认有以下配置：

<IfModule mod_negotiation.c>
<IfModule mod_include.c>
    <Directory "/usr/share/apache2/error">
        AllowOverride None
        Options IncludesNoExec
        AddOutputFilter Includes html
        AddHandler type-map var
        Order allow,deny
        Allow from all
        LanguagePriority en cs de es fr it ja ko nl pl pt-br ro sv tr
        ForceLanguagePriority Prefer Fallback
    </Directory>

    ErrorDocument 400 /error/HTTP_BAD_REQUEST.html.var
    ErrorDocument 401 /error/HTTP_UNAUTHORIZED.html.var
    ErrorDocument 403 /error/HTTP_FORBIDDEN.html.var
    ErrorDocument 404 /error/HTTP_NOT_FOUND.html.var
    ErrorDocument 405 /error/HTTP_METHOD_NOT_ALLOWED.html.var
    ErrorDocument 408 /error/HTTP_REQUEST_TIME_OUT.html.var
    ErrorDocument 410 /error/HTTP_GONE.html.var
    ErrorDocument 411 /error/HTTP_LENGTH_REQUIRED.html.var
    ErrorDocument 412 /error/HTTP_PRECONDITION_FAILED.html.var
    ErrorDocument 413 /error/HTTP_REQUEST_ENTITY_TOO_LARGE.html.var
    ErrorDocument 414 /error/HTTP_REQUEST_URI_TOO_LARGE.html.var
    ErrorDocument 415 /error/HTTP_UNSUPPORTED_MEDIA_TYPE.html.var
    ErrorDocument 500 /error/HTTP_INTERNAL_SERVER_ERROR.html.var
    ErrorDocument 501 /error/HTTP_NOT_IMPLEMENTED.html.var
    ErrorDocument 502 /error/HTTP_BAD_GATEWAY.html.var
    ErrorDocument 503 /error/HTTP_SERVICE_UNAVAILABLE.html.var
    ErrorDocument 506 /error/HTTP_VARIANT_ALSO_VARIES.html.var
</IfModule>
</IfModule>

因此，每次向客户端发送 404 错误时，Includes 过滤器与指令相结合ErrorDocument 404 /error/HTTP_NOT_FOUND.html.var都会导致将重定向发送到浏览器，http://rhodecode.mydomain.com/error/HTTP_NOT_FOUND.html.var
您可以在我的重写日志中看到此行为，其中要重写的表达式使用 /error/HTTP_NOT_FOUND.html.var 初始化：

172.17.1.49 - - [10/Mar/2014:04:04:23 +0000] [rhodecode.mydomain.com/sid#7f98fedd7f00][rid#7f98f91fe7a0/initial/redir#1] (2) init rewrite engine with requested uri /error/HTTP_NOT_FOUND.html.var

另请注意重新目录#1表示发生了内部重定向。因此，我将配置更改为

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
AllowEncodedSlashes NoDecode

并将 ifmodule 指令更改为

<IfModule !mod_include.c>

因此没有执行任何 ErrorDocument 指令，一切都运行正常！
这一次，重写日志在 url 中显示 %2F，并且没有发生 redir：

172.17.1.49 - - [10/Mar/2014:04:55:40 +0000] [rhodecode.mydomain.com/sid#7f9fd1f83f00][rid#7f9fcc3a90a0/initial] (2) init rewrite engine with requested uri /%2F

Answer