如何在Mac OS X Mountain Lion Server中设置web代理服务?

我正试图利用Mac OS X Server中的配置文件,而不是直接修改Apache的站点文件,为eXist XML数据库添加反向代理条目。映射应来自[http://example.com/exist]至[http://localhost:8080/exist]。

eXist已启动并运行。

我添加了以下plist文件/Library/Server/Web/Config/apache2/webapps/org.exist-db.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<!-- See man pages for webapp.plist(5) and webappctl(8) for information about this example webapp.plist -->

<plist version="1.0">
     <dict>
         <key>includeFiles</key>
         <array>
             <!-- Include files are activated in virtual host when webapp is started -->
         </array>
         <key>launchKeys</key>
         <array>
             <!-- Launchd plists in /Applications/Server.app/Contents/ServerRoot/System/Library/LaunchDaemons are loaded when webapp is started -->
         </array>
         <key>name</key>
         <string>org.exist-db</string>
         <key>displayName</key>
         <!-- Name shown in Server app -->
         <string>eXist Open Source XML Database</string>
         <key>proxies</key>
         <!-- ProxyPass/ProxyPassReverse directives are activated when webapp is started --> 
         <dict>
             <key>/exist</key>
             <!-- Sets up a reverse proxy -->
             <dict>
                 <key>keysAndValues</key>
                 <string/>
                 <key>path</key>
                 <string>/exist</string>
                 <key>urls</key>
                 <!-- URLs comprise a proxy_balancer group -->
                 <array>
                     <string>http://localhost:8080/exist</string>
                 </array>
             </dict>
         </dict>
         <key>requiredModuleNames</key>
         <array>
             <!-- Apache plugin modules are enabled when webapp is started -->
             <string>proxy_module</string>
         </array>
         <key>requiredWebAppNames</key>
         <array>
             <!-- Required web apps are started when this webapp is started -->
         </array>
         <key>installationIndicatorFilePath</key>
         <!-- The presence of this file indicates web app is installed -->
         <string>/Users/cahlander/eXist-trunk</string>
         <key>sslPolicy</key>
         <!-- Determines webapp SSL behavior -->
         <integer>0</integer>
         <!-- 0: default, UseSSLWhenEnabled -->
         <!-- 1:          UseSSLAlways -->
         <!-- 2:          UseSSLOnlyWhenCertificateIsTrustable -->
         <!-- 3:          UseSSLNever -->
         <!-- 4:          UseSSLAndNonSSL -->
     </dict>
</plist>

在本地服务器上运行,转到 http://example.com:8080/exist 工作,但来自不同的机器,去 http://example.com/exist 没有。此外,“eXist开放源代码XML数据库”应该在高级设置中显示为web应用程序。事实并非如此。我做错了什么?