java - 是否可以在 :8888 in webdefault. xml 中运行主 Servlet 和 ProxyServlet？

Question

我有一个在 jetty servlet 中运行的网络应用程序。

启动时运行在localhost:8888/

我正在使用单独的 Ruby/Sinatra 进程来管理我的 Assets (js、css、图像)。这在 localhost:3000/上运行

理想情况下，我想要一个 Jetty ProxyServlet，它将任何请求从 localhost:8888/assets/* 发送到 localhost:3000/assets/* 以避免跨域错误。

这只是在开发中，我的生产 Assets 将在其他地方提供服务，所以不要在可扩展性或其他问题的背景下回答。

此外，我需要这两个“Servlet”在同一个端口 8888 中并排运行吗？

所以又...所有对 localhost:8888/*(/assets/ 除外)的请求都将路由到主 webapp servlet。所有对 localhost:8888/assets/ 的请求都会路由到 ruby​​/sinatra 服务器 localhost:3000/assets/*

我当前的 webdefault.xml:

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app
  xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
  metadata-complete="true"
  version="2.5"
>

  <description>
    Default web.xml file.  
    This file is applied to a Web application before it's own WEB_INF/web.xml file
  </description>
<filter>
    <filter-name>UrlRewriteFilter</filter-name>
    <filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>

    <init-param>
        <param-name>confPath</param-name>
        <param-value>/urlrewrite.xml</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>UrlRewriteFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
</filter-mapping>

  <listener>
   <listener-class>org.eclipse.jetty.servlet.listener.ELContextCleaner</listener-class>
  </listener>

  <listener>
   <listener-class>org.eclipse.jetty.servlet.listener.IntrospectorCleaner</listener-class>
  </listener>

  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  -->
  <servlet>
    <servlet-name>default</servlet-name>
    <servlet-class>org.eclipse.jetty.servlet.DefaultServlet</servlet-class>
    <init-param>
      <param-name>aliases</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>acceptRanges</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>dirAllowed</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>welcomeServlets</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>redirectWelcome</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>maxCacheSize</param-name>
      <param-value>0</param-value>
    </init-param>
    <init-param>
      <param-name>maxCachedFileSize</param-name>
      <param-value>0</param-value>
    </init-param>
    <init-param>
      <param-name>maxCachedFiles</param-name>
      <param-value>2048</param-value>
    </init-param>
    <init-param>
      <param-name>gzip</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>useFileMappedBuffer</param-name>
      <param-value>false</param-value>
    </init-param>
    <!--
    <init-param>
      <param-name>resourceCache</param-name>
      <param-value>resourceCache</param-value>
    </init-param>
    -->
    <!--
    <init-param>
      <param-name>cacheControl</param-name>
      <param-value>max-age=3600,public</param-value>
    </init-param>
    -->
    <load-on-startup>0</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- ********************************************************************* -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <!-- Railo -->

  <servlet id="Railo">
    <description>Railo CFML Engine</description>
    <servlet-name>CFMLServlet</servlet-name>    
    <servlet-class>railo.loader.servlet.CFMLServlet</servlet-class>
    <!--
    <init-param>
      <param-name>railo-server-root</param-name>
      <param-value>/var/Railo/config/server/</param-value>
      <description>Railo Server configuration directory (for Server-wide configurations, settings, and libraries)</description>
    </init-param>
    !-->
    <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
    <!--
    <init-param>
      <param-name>railo-web-directory</param-name>
      <param-value>/var/Railo/config/web/{web-context-label}/</param-value> 
      <description>Railo Web Directory (for Website-specific configurations, settings, and libraries)</description>
    </init-param>
    !-->
    <load-on-startup>2</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>CFMLServlet</servlet-name>
    <url-pattern>*.cfc</url-pattern>
    <url-pattern>*.cfm</url-pattern>
    <url-pattern>*.cfml</url-pattern>   
    <url-pattern>/index.cfc/*</url-pattern>
    <url-pattern>/index.cfm/*</url-pattern>
    <url-pattern>/admin/index.cfm/*</url-pattern>
    <url-pattern>/lms/index.cfm/*</url-pattern>
    <url-pattern>/index.cfml/*</url-pattern>
  </servlet-mapping>


  <!-- ===================================================================== -->
  <!-- Railo REST Servlet - handles Railo's RESTful web services             -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <servlet id="RESTServlet">
    <description>Railo Servlet for RESTful services</description>
    <servlet-name>RESTServlet</servlet-name>    
    <servlet-class>railo.loader.servlet.RestServlet</servlet-class>
    <load-on-startup>3</load-on-startup>
  </servlet>  

  <servlet-mapping>
    <servlet-name>RESTServlet</servlet-name>
    <url-pattern>/rest/*</url-pattern>
  </servlet-mapping>


  <!-- ===================================================================== -->
  <!-- Railo MessageBroker Servlet - Flex Gateway                            -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <servlet id="MessageBrokerServlet">
    <description>Railo Servlet for Flex Gateway</description>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <servlet-class>flex.messaging.MessageBrokerServlet</servlet-class>
    <!-- init-param>
      <param-name>services.configuration.file</param-name>
      <param-value>/WEB-INF/flex/services-config.xml</param-value>
    </init-param !-->
    <!-- init-param>
      <param-name>messageBrokerId</param-name>
      <param-value>_default_</param-value>
    </init-param !-->
    <!-- load-on-startup>2</load-on-startup !-->
  </servlet>

  <servlet-mapping>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <url-pattern>/flex2gateway/*</url-pattern>
    <url-pattern>/flashservices/gateway/*</url-pattern>
    <url-pattern>/messagebroker/*</url-pattern>
  </servlet-mapping>


  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <!--                                                 Railo Definitions End -->  
  <!-- ===================================================================== -->
  <!-- _____________________________________________________________________ -->


  <!-- ==================================================================== -->
  <session-config>
    <session-timeout>30</session-timeout>
  </session-config>

  <!-- ==================================================================== -->
  <welcome-file-list>
    <welcome-file>index.cfm</welcome-file>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <!-- welcome-file>index.jsp</welcome-file !-->
  </welcome-file-list>

  <!-- ==================================================================== -->
  <locale-encoding-mapping-list>
    <locale-encoding-mapping><locale>ar</locale><encoding>ISO-8859-6</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>be</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>bg</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>ca</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>cs</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>da</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>de</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>el</locale><encoding>ISO-8859-7</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>en</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>es</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>et</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>fi</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>fr</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>hr</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>hu</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>is</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>it</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>iw</locale><encoding>ISO-8859-8</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>ja</locale><encoding>Shift_JIS</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>ko</locale><encoding>EUC-KR</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>lt</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>lv</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>mk</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>nl</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>no</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>pl</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>pt</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>ro</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>ru</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>sh</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>sk</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>sl</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>sq</locale><encoding>ISO-8859-2</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>sr</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>sv</locale><encoding>ISO-8859-1</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>tr</locale><encoding>ISO-8859-9</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>uk</locale><encoding>ISO-8859-5</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>zh</locale><encoding>GB2312</encoding></locale-encoding-mapping>
    <locale-encoding-mapping><locale>zh_TW</locale><encoding>Big5</encoding></locale-encoding-mapping>
  </locale-encoding-mapping-list>

  <security-constraint>
    <web-resource-collection>
      <web-resource-name>Disable TRACE</web-resource-name>
      <url-pattern>/</url-pattern>
      <http-method>TRACE</http-method>
    </web-resource-collection>
    <auth-constraint/>
  </security-constraint>

</web-app>

我在想这样的事情？但它只是导致 503 Service Unavailable

<servlet>
    <servlet-name>JettyProxy</servlet-name>
    <servlet-class>org.mortbay.servlet.ProxyServlet$Transparent</servlet-class>
    <init-param>
     <!-- This points to the actual server where requests are proxied to -->
     <param-name>ProxyTo</param-name>
     <param-value>http://localhost:3000/</param-value>
    </init-param>
    <init-param>
     <!-- This will be stripped off the client request URL -->
     <param-name>Prefix</param-name>
     <param-value>/</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

 <servlet-mapping>
  <servlet-name>JettyProxy</servlet-name>
  <url-pattern>/assets/*</url-pattern>
 </servlet-mapping>

这可能吗？如果是，将如何实现？

Answer 1

您的标签说您正在使用 jetty-8 但您的代理 servlet 类指示 jetty-6 (org.mortbay.servlet.ProxyServlet).在 jetty-8 上，您应该使用的 ProxyServlet 是 org.eclipse.jetty.servlets.ProxyServlet 是的，这听起来像是一个完全正常的用例。