我需要在我的 .htaccess 中设置 404 错误处理，此外还要处理旧网站链接的一些 301 重定向。新网站使用 Joomla 制作，旧网站使用 asp 编写。joomla 中启用了 Sef url 和 url 重写。
我需要：
- 重定向 301 从 /old/path/on/old/site/old-page.asp?parameter1=value1¶meter2=value2 到 /index.php?option=com_mycomponent&view=myview¶meter1=value1¶meter2=value2
- 将所有其他未找到的文档重定向至 /index.php?option=com_content&view=article&id=123&Itemid=456
这几乎可行，但我有一个问题：
- ErrorDocument 指令发送的是 302 错误，而不是 404 错误。如果我删除http://www.mywebsite.com从ErrorDocument来看，它会导致Joomla出现错误500，因为当请求page.asp时，它会在查询字符串中找到.asp扩展名，并尝试提供不存在的view.asp.php（我不想仅仅为了处理这个问题而创建它）。
这是我的.htaccess：
##
# @package Joomla
# @copyright Copyright (C) 2005 - 2013 Open Source Matters. All rights reserved.
# @license GNU General Public License version 2 or later; see LICENSE.txt
##
##
# READ THIS COMPLETELY IF YOU CHOOSE TO USE THIS FILE!
#
# The line just below this section: 'Options +FollowSymLinks' may cause problems
# with some server configurations. It is required for use of mod_rewrite, but may already
# be set by your server administrator in a way that dissallows changing it in
# your .htaccess file. If using it causes your server to error out, comment it out (add # to
# beginning of line), reload your site in your browser and test your sef url's. If they work,
# it has been set by your server administrator and you do not need it set here.
##
ErrorDocument 404 http://www.mywebsite.com/index.php?option=com_content&view=article&id=123&Itemid=456
## Can be commented out if causes errors, see notes above.
Options +FollowSymLinks
## Mod_rewrite in use.
RewriteEngine On
## Begin - Rewrite rules to block out some common exploits.
# If you experience problems on your site block out the operations listed below
# This attempts to block the most common type of exploit `attempts` to Joomla!
#
# Block out any script trying to base64_encode data within the URL.
RewriteCond %{QUERY_STRING} base64_encode[^(]*\([^)]*\) [OR]
# Block out any script that includes a <script> tag in URL.
RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL.
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL.
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
# Return 403 Forbidden header and show the content of the root homepage
RewriteRule .* index.php [F]
#
## End - Rewrite rules to block out some common exploits.
## Begin - Custom redirects
#
# If you need to redirect some pages, or set a canonical non-www to
# www redirect (or vice versa), place that code here. Ensure those
# redirects use the correct RewriteRule syntax and the [R=301,L] flags.
#
## End - Custom redirects
##
# Uncomment following line if your webserver's URL
# is not directly related to physical file paths.
# Update Your Joomla! Directory (just / for root).
##
# RewriteBase /
RewriteCond %{QUERY_STRING} ^(.*)$ [NC]
RewriteRule ^/old/path/on/old/site/old-page.asp$ /index.php?option=com_mycomponent&view=myview&%1 [NC,L,R=301]
## Begin - Joomla! core SEF Section.
#
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
#
# If the requested path and file is not /index.php and the request
# has not already been internally rewritten to the index.php script
RewriteCond %{REQUEST_URI} !^/index\.php
# and the request is for something within the component folder,
# or for the site root, or for an extensionless URL, or the
# requested URL ends with one of the listed extensions
RewriteCond %{REQUEST_URI} /component/|(/[^.]*|\.(php|html?|feed|pdf|vcf|raw))$ [NC]
# and the requested path and file doesn't directly match a physical file
RewriteCond %{REQUEST_FILENAME} !-f
# and the requested path and file doesn't directly match a physical folder
RewriteCond %{REQUEST_FILENAME} !-d
# internally rewrite the request to the index.php script
RewriteRule .* index.php [L]
#
## End - Joomla! core SEF Section.