配置带有缓存的嵌入式（以编程方式）jetty 9.3.0

Question

我似乎无法让我的码头使用缓存。我有一个只会显示 html 的码头服务器。我在那里有 JavaScript 和很多我不想每次都加载的图像。例如，我的应用程序需要在 3 个页面之间在 10 秒内切换。载入jQuery 3 次很费时间，载入logo 图片等更耗时。这就是为什么我要启用缓存。

这是我得到的：

server = new Server(); //new Jetty Server
//setting up a ssl connection
try
{
    SslContextFactory cf = new SslContextFactory();
    cf.setKeyStorePath(keystore);
    cf.setKeyStorePassword("password");
    
    HttpConfiguration config = new HttpConfiguration();
    config.addCustomizer(new SecureRequestCustomizer());
    config.setSecureScheme("https");
    config.setSecurePort(8443);
    
    HttpConfiguration sslConfiguration = new HttpConfiguration(config);
    sslConfiguration.addCustomizer(new SecureRequestCustomizer());
    
    httpConnector = new ServerConnector(server);
    httpConnector.addConnectionFactory(new HttpConnectionFactory(config));
    httpConnector.setPort(suggestHttpPort());
    httpConnector.setName("unsecured");
    sslConnector = new ServerConnector(server, 
            new SslConnectionFactory(cf, HttpVersion.HTTP_1_1.toString()), 
            new HttpConnectionFactory(sslConfiguration));
    sslConnector.setPort(suggestHttpSSLPort());
    sslConnector.setName("secured");
    
    server.setConnectors(new Connector[] { httpConnector, sslConnector });  
}
catch (Exception e)
{
    log.error("setting up Jetty failed", e);
}
// This is where i want to enable caching, at least that is what i have figuged out so far but its not working
DefaultServlet defaultServlet = new DefaultServlet();
ServletHolder holder = new ServletHolder(defaultServlet);
holder.setInitParameter("cacheControl", "max-age=120, public");
ServletContextHandler bb = new ServletContextHandler();
bb.addServlet(holder, "/");
server.setHandler(bb);
server.start();

我做错了什么？我想为所有内容启用缓存...

Answer 1

不要像针对已启动的 Servlet 那样直接使用 ServletHolder，而是让 ServletHolder 创建并初始化 class 引用。

您需要一个 ServletContextHandler 和一个已定义的基础资源，DefaultServlet 也可以使用它（这应该是一个指向静态文件内容根目录的 URI）

示例：

ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
context.setBaseResource(Resource.newResource(webRootUri));

ServletHolder holderPwd = new ServletHolder("default", DefaultServlet.class);
holderPwd.setInitParameter("dirAllowed", "true");
holderPwd.setInitParameter("cacheControl", "max-age=3600,public");
context.addServlet(holderPwd,"/");
server.setHandler(context);

配置带有缓存的嵌入式（以编程方式）jetty 9.3.0

configure jetty 9.3.0 embedded (programmatically) with caching

java

caching

jetty