java – 从嵌入式Jetty中的备用路径提供静态文件

我正在尝试创建一个嵌入式jetty服务器,其中包含一个服务于某些动态数据的自定义servlet,以及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.

这就是我所拥有的……

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作为文件服务器,仍然有自定义DataServelet仍然工作.

有没有人有任何想法？

解决方法:

你需要什么：

> DefaultServlet位于“/”(推荐,它是servlet规范的要求)

>这应该是“默认”的命名调度程序(servlet规范的另一个要求)

>带有自定义静态内容的备用DefaultServlet,通过init-params配置

>使用与“default”不同的命名调度程序(以避免其他servlet规范功能之间发生名称冲突)
>您可以使用ServletHolder.setInitParameter(名称,值)来完成此任务
>确保将pathInfoOnly参数设置为true(以解决“默认”命名调度程序的特殊情况)

>您自己的servlet,提供动态内容.

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);
        }
    }

}

标签：java,embedded-jetty,servlets,jetty,fileserver
来源： https://codeday.me/bug/20190916/1806721.html