从嵌入式Jetty中的备用路径提供静态文件 [英] Serving static files from alternate path in embedded Jetty

问题描述

我正在尝试创建一个嵌入式jetty服务器，其中包含一个提供动态数据的自定义servlet，以及一个将为某些图像提供服务的默认servlet。我有自定义servlet工作，但我无法弄清楚如何添加默认servlet来提供图像文件。

I'm trying to create an embedded jetty server with both a custom servlet that serves some dynamic data, and default servlet that will serve some images. I have the custom servlet working, but I can't figure out how to add a default servlet to serve the image files.

这就是我所拥有的...

This is what I have...

private void setUpServer(ServerOptions options){
    s = new Server(options.getPort());
    this.options = options;
    context = new ServletContextHandler(ServletContextHandler.SESSIONS);
    context.setContextPath("/");
    s.setHandler(context);
    context.addServlet(new ServletHolder(new DataServlet()), "/data/*");
    context.addServlet(new ServletHolder(new DefaultServlet()), "/pictures/*");
}

我无法弄清楚如何配置DefaultServlet作为文件工作服务器仍然有自定义DataServelet仍然工作。

I can't figure out how to configure the DefaultServlet to work as a file server and still have the custom DataServelet still work.

有没有人有任何想法？

推荐答案

你需要什么：

1. /的DefaultServlet（推荐，这是servlet规范的要求）
   
   
   
   
   • 这应该是default的命名调度程序（servlet规范的另一个要求）
   
   

• 使用与default不同的命名调度程序（避免其他servlet规范功能之间的名称冲突）


• 您可以使用 ServletHolder.setInitParameter（名称，值）来完成此操作


• 请务必将 pathInfoOnly 参数设置为 true （以解决此问题） 违约的特例 命名调度员

• Using a different named dispatcher than "default" (to avoid a name collision between other servlet spec features)
• You can use the ServletHolder.setInitParameter(name,value) to accomplish this
• Be sure you set the pathInfoOnly parameter to true (to get around special cases for "default" named dispatchers)

AltDefaultServlet.java

package jetty.demo;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.servlet.DefaultServlet;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;

public class AltDefaultServlet
{
    public static void main(String[] args)
    {
        System.setProperty("org.eclipse.jetty.LEVEL","INFO");

        Server server = new Server();
        ServerConnector connector = new ServerConnector(server);
        connector.setPort(8080);
        server.addConnector(connector);

        // The filesystem paths we will map
        String homePath = System.getProperty("user.home");
        String pwdPath = System.getProperty("user.dir");

        // Setup the basic application "context" for this application at "/"
        // This is also known as the handler tree (in jetty speak)
        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
        context.setResourceBase(pwdPath);
        context.setContextPath("/");
        server.setHandler(context);

        // add a simple Servlet at "/dynamic/*"
        ServletHolder holderDynamic = new ServletHolder("dynamic", DynamicServlet.class);
        context.addServlet(holderDynamic, "/dynamic/*");

        // add special pathspec of "/home/" content mapped to the homePath
        ServletHolder holderHome = new ServletHolder("static-home", DefaultServlet.class);
        holderHome.setInitParameter("resourceBase",homePath);
        holderHome.setInitParameter("dirAllowed","true");
        holderHome.setInitParameter("pathInfoOnly","true");
        context.addServlet(holderHome,"/home/*");

        // Lastly, the default servlet for root content (always needed, to satisfy servlet spec)
        // It is important that this is last.
        ServletHolder holderPwd = new ServletHolder("default", DefaultServlet.class);
        holderPwd.setInitParameter("dirAllowed","true");
        context.addServlet(holderPwd,"/");

        try
        {
            server.start();
            server.dump(System.err);
            server.join();
        }
        catch (Throwable t)
        {
            t.printStackTrace(System.err);
        }
    }

}

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