Restlet - 使用Router附加Resource类时出现问题 [英] Restlet - trouble attaching Resource class with Router

问题描述

使用Restlet 2.1.0，Java SE版本进行原型设计，我无法将ServerResource类映射到URL。我使用Router.attach方法尝试了很多变种，但没有任何效果。

Prototyping with Restlet 2.1.0, Java SE version, I am having trouble mapping ServerResource classes to urls. I've tried quite a few variations using the Router.attach method, but nothing has worked.

我目前的代码如下所示：

My current code looks like this:

/**
 * @param args
 * @throws Exception 
 */
public static void main(String[] args) throws Exception {
    final Router router = new Router();
    router.attach("/hello", FirstServerResource.class);
    router.attach("/json", Json.class);

    Application myApp = new Application() {
        @Override
        public org.restlet.Restlet createInboundRoot() {
            router.setContext(getContext());
            return router;
        };
    };

    new Server(Protocol.HTTP, 8182, myApp).start();
}

当我浏览 http：// localhost： 8182 / hello 它没有正确匹配模板。通过源代码调试，我看到会发生的情况是匹配逻辑将请求的资源视为 http：// localhost：8182 / hello 而不是 /你好。发生这种情况的Restlet代码在这里：

When I browse to http://localhost:8182/hello it doesn't do the template match correctly. Debugging through the source code, I see what happens is that the match logic sees the requested resource as http://localhost:8182/hello instead of just /hello. The Restlet code where this happens is here:

// HttpInboundRequest.java
// Set the resource reference
if (resourceUri != null) {
    setResourceRef(new Reference(getHostRef(), resourceUri));

    if (getResourceRef().isRelative()) {
        // Take care of the "/" between the host part and the segments.
        if (!resourceUri.startsWith("/")) {
            setResourceRef(new Reference(getHostRef().toString() + "/"
                    + resourceUri));
        } else {
            setResourceRef(new Reference(getHostRef().toString()
                    + resourceUri));
        }
    }

    setOriginalRef(getResourceRef().getTargetRef());
}

在上面的代码中，它将资源视为 relative ，因此将请求的资源从 / hello 更改为完整的URL。我在这里遗漏了一些明显的东西，但我完全被难倒了。

In the code above, it sees the Resource as relative, and therefore changes the requested resource from /hello to the full url. I'm missing something obvious here, but I'm totally stumped.

推荐答案

最后通过打开日志记录找到解决方案（精细）。我看到了这条日志消息：

Finally found the solution by turning on the logging (FINE). I saw this log message:

默认情况下，应用程序应以
顺序附加到父组件，以便让应用程序出站root句柄调用正确。

By default, an application should be attached to a parent component in order to let application's outbound root handle calls properly.

我不完全理解它的意思（也许我必须阅读文档开始完成？）。将应用程序附加到 VirtualHost 修复了问题：

I don't totally understand what it meant (maybe I have to read docs start to finish?). Attaching the application to a VirtualHost fixed the problem:

public static void main(String[] args) throws Exception {   
    final Router router = new Router();
    router.attach("/hello", FirstServerResource.class);
    router.attach("/json", Json.class);
    router.attachDefault(Default.class);

    Application myApp = new Application() {
        @Override
        public org.restlet.Restlet createInboundRoot() {
            router.setContext(getContext());                
            return router;
        };
    };


    Component component = new Component();
    component.getDefaultHost().attach("/test", myApp);

    new Server(Protocol.HTTP, 8182, component).start();
}

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