从嵌入式 Jetty 中的备用路径提供静态文件

问题描述：

我正在尝试使用提供一些动态数据的自定义 servlet 和将提供一些图像的默认 servlet 创建一个嵌入式码头服务器.我有自定义 servlet 工作，但我不知道如何添加默认 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/*");
}

我不知道如何将 DefaultServlet 配置为作为文件服务器工作，同时自定义 DataServelet 仍然有效.

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

有人有什么想法吗?

答

您需要什么:

/"处的 DefaultServlet(推荐，这是 servlet 规范的要求)
- 这应该在default"的命名调度程序(servlet规范的另一个要求)

使用与默认"不同的命名调度程序(以避免其他 servlet 规范功能之间的名称冲突)
您可以使用 ServletHolder.setInitParameter(name,value) 来完成此操作
确保将 pathInfoOnly 参数设置为 true(以避开默认"命名调度程序的特殊情况)

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.setBaseResource(Resource.newResource(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);
        }
    }

}

从嵌入式 Jetty 中的备用路径提供静态文件

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