tapestry url 解析

最新推荐文章于 2021-02-23 20:44:55 发布

Jahson

最新推荐文章于 2021-02-23 20:44:55 发布

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分类专栏： tapestry 文章标签： Tapestry EXT REST

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本文介绍了Engineservice对象如何通过实现IEngineService接口来处理应用URL，详细解析了DirectServiceEncoder如何从URL中提取关键信息如PAGE、COMPONENT及SERVICE，并通过IRequestCycle进行请求周期管理。

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Engine service是实现了IEngineService接口的对象，他包含很多创建和服务应用URL的方法;其主要方法public void service(WebRequest request, WebResponse response)
cycle = _infrastructure.getRequestCycleFactory().newRequestCycle(this); 获得RequestCycle
service = cycle.getService();
// Let the service handle the rest of the request.
service.service(cycle);

其中newRequestCycle(this) 就是对url 路径的解析处理

public IRequestCycle newRequestCycle(IEngine engine)
{
WebRequest request = _infrastructure.getRequest();

QueryParameterMap parameters = extractParameters(request);//常规处理request参数

decodeParameters(request.getActivationPath(), request.getPathInfo(), parameters);//调用encoders 来解析路径，例如DirectServiceEncoder，就解析出PAGE，extension，COMPONENT等信息
//对于DirectServiceEncoder encoding.setParameterValue(ServiceConstants.SERVICE,
Tapestry.DIRECT_SERVICE); DIRECT_SERVICE名称在此类是固定值
String serviceName = findService(parameters);

IRequestCycle cycle = new RequestCycle(engine, parameters, serviceName, _environment);

_requestGlobals.store(cycle);

try {

_requestGlobals.store(_responseDelegateFactory.getResponseBuilder(cycle));

cycle.setResponseBuilder(_requestGlobals.getResponseBuilder());

} catch (IOException e) {
throw new ApplicationRuntimeException("Error creating response builder.", e);
}

return cycle;
}

从而得出Direct路径格式 /PageName,componetIdPath.ext?otherParam
PageServiceEncoder: /PageName.ext
AssetEncoder: String fullPath = _path + ((digest != null) ? "/" + digest : "/" + DIGEST_STATIC) + path; 即 /static/path

ServiceExtensionEncoder: encoding.setServletPath("/" + service + "." + _extension);