我有一个网站,似乎不能从非www重定向到www。

我的Apache配置如下:

RewriteEngine On
### re-direct to www
RewriteCond %{http_host} !^www.example.com [nc]
RewriteRule ^(.*)$ http://www.example.com/$1 [r=301,nc] 

我错过了什么?


当前回答

<VirtualHost *:80>
    ServerAlias example.com
    RedirectMatch permanent ^/(.*) http://www.example.com/$1
</VirtualHost>

其他回答

RewriteCond %{HTTP_HOST} ^!example.com$ [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [R=301,L]

This starts with the HTTP_HOST variable, which contains just the domain name portion of the incoming URL (example.com). Assuming the domain name does not contain a www. and matches your domain name exactly, then the RewriteRule comes into play. The pattern ^(.*)$ will match everything in the REQUEST_URI, which is the resource requested in the HTTP request (foo/blah/index.html). It stores this in a back reference, which is then used to rewrite the URL with the new domain name (one that starts with www).

[NC]表示不区分大小写的模式匹配,[R=301]表示使用代码301进行外部重定向(资源永久移动),[L]停止所有进一步重写,并立即重定向。

<VirtualHost *:80>
    ServerAlias example.com
    RedirectMatch permanent ^/(.*) http://www.example.com/$1
</VirtualHost>

重定向代码的非www => www和相反的www =>非www。在.htaccess文件中没有硬编码域和方案。因此,源域名和http/https版本将被保留。

Apache 2.4及更新版本

www => www:

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ %{REQUEST_SCHEME}://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

WWW =>非WWW:

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^ %{REQUEST_SCHEME}://%1%{REQUEST_URI} [R=301,L]

注意:在Apache 2.2上无效,%{REQUEST_SCHEME}不可用。为了与Apache 2.2兼容,请使用下面的代码或将%{REQUEST_SCHEME}替换为固定的http/https。


Apache 2.2及更新版本

www => www:

RewriteEngine On

RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^ https://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

... 或者更短的版本……

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|offs
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

WWW =>非WWW:

RewriteEngine On

RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^ http://%1%{REQUEST_URI} [R=301,L]

RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [R=301,L]

... 更短的版本不可能,因为%N仅可从上次RewriteCond…

如果你正在使用Apache 2.4,不需要启用重写Apache模块,你可以使用这样的东西:

# non-www to www
<If "%{HTTP_HOST} = 'domain.com'">
  Redirect 301 "/" "http://www.domain.com/"
</If>

我在WP Multisite上有一个类似的任务,其中重定向规则必须是通用的(对于我添加到网络中的任何给定域)。我首先解决了向域(停放的域)添加通配符。注意。com之后。

CNAME * domain.com.

然后我在我的多站点根目录下的.htaccess文件中添加了以下代码行。我想它适用于任何网站。

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

希望这能有所帮助。

ps.如果你想从not www重定向到www,把最后一行改为

RewriteRule ^(.*)$ http://www.%1/$1 [R=301,L]