Apache-2.2

使用 Apache 代理的 Wordpress 進行無限重定向

  • February 6, 2012

我們正在嘗試在公共伺服器上設置 Apache，以便在另一台伺服器上使用 WordPress 代理對 Apache 的請求，但我們得到了無限的重定向循環。

以 www.example.com/about 開頭的請求應該被代理到內部伺服器 wp.example.corp。例如

www.example.com/about/about/team => proxy => wp.example.corp/about/team

更複雜的是，我們的 WordPress 安裝在一個名為“wp”的子目錄中。因此，在 WordPress 伺服器上，我們有以下設置：

以下是公共伺服器上 Apache 配置中的一些相關位：

<VirtualHost *:80>
 #...
 ProxyPreserveHost On
 ProxyRequests off
 ProxyErrorOverride On
 <Proxy *>
   Order allow,deny
   Allow from all
 </Proxy>


 RewriteCond %{REQUEST_URI} ^/about/?$
 RewriteRule ^/about/?$ http://wp.example.corp/ [P,L]

 RewriteCond %{REQUEST_URI} ^/about/.+
 RewriteRule ^/about/(.*) http://wp.example.corp/$1 [P,L]

 #...
</VirtualHost>

WordPress 伺服器上的 Apache 配置非常簡單：

<VirtualHost *:80>
 #...
 DocumentRoot /var/lib/publicpages

 <Directory /var/lib/publicpages/>
   Options Indexes FollowSymLinks MultiViews
   AllowOverride FileInfo Indexes Limit Options
 </Directory>
</VirtualHost>

這是來自 WordPress 伺服器根目錄的 .htaccess 文件：

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

將 LogLevel 設置為調試，我可以看到請求到達公共伺服器並以 301 重定向響應：

x.x.x.x, y.y.y.y (y.y.y.y) - - [25/Jan/2012:16:44:28 -0600] "GET /about/about/team/ HTTP/1.1" 301 20 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2"
x.x.x.x, y.y.y.y (y.y.y.y) - - [25/Jan/2012:16:44:28 -0600] "GET /about/about/team/ HTTP/1.1" 301 20 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2"

而且我可以看到相同的請求到達 WordPress 伺服器，該伺服器正在響應 301 重定向：

z.z.z.z - - [25/Jan/2012:16:44:28 -0600] "GET /about/team/ HTTP/1.1" 301 20 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2"
z.z.z.z - - [25/Jan/2012:16:44:29 -0600] "GET /about/team/ HTTP/1.1" 301 20 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2"

我還在 WordPress 伺服器上啟用了完整的 Rewrite 日誌記錄，並一遍又一遍地看到以下內容：

x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] add path info postfix: /var/lib/publicpages/about -> /var/lib/publicpages/about/team
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] strip per-dir prefix: /var/lib/publicpages/about/team -> about/team
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] applying pattern '^index\.php$' to uri 'about/team'
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] add path info postfix: /var/lib/publicpages/about -> /var/lib/publicpages/about/team
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] strip per-dir prefix: /var/lib/publicpages/about/team -> about/team
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] applying pattern '.' to uri 'about/team'
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (4) [perdir /var/lib/publicpages/] RewriteCond: input='/var/lib/publicpages/about' pattern='!-f' => matched
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (4) [perdir /var/lib/publicpages/] RewriteCond: input='/var/lib/publicpages/about' pattern='!-d' => matched
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (2) [perdir /var/lib/publicpages/] rewrite 'about/team' -> 'index.php'
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (3) [perdir /var/lib/publicpages/] add per-dir prefix: index.php -> /var/lib/publicpages/index.php
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (2) [perdir /var/lib/publicpages/] trying to replace prefix /var/lib/publicpages/ with /
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (5) strip matching prefix: /var/lib/publicpages/index.php -> index.php
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (4) add subst prefix: index.php -> /index.php
x.x.x.x - - [26/Jan/2012:09:54:04 --0600] [www.example.com/sid#80e06c20][rid#80fa4200/initial] (1) [perdir /var/lib/publicpages/] internal redirect with /index.php [INTERNAL REDIRECT]

我錯過了什麼？

我們放棄了，只是讓兩個 Apache 伺服器中的 URL/路徑匹配。例如

www.example.com/about/about/team => proxy => wp.example.corp/about/about/team

雖然這並不能完全解決問題，但它有效地迴避了問題並消除了多餘的 301 重定向。

您可以使用 ProxyPass 來執行此操作，而不是使用重寫規則。

ProxyPreserveHost On
ProxyPass /about/ http://wp.example.corp/
ProxyPassReverse /about/ http://wp.example.corp/

引用自：https://serverfault.com/questions/353664

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