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com.blade.web.AsynRequestHandler Maven / Gradle / Ivy
/**
* Copyright (c) 2015, biezhi 王爵 ([email protected] )
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.blade.web;
import java.lang.reflect.Method;
import java.util.List;
import javax.servlet.AsyncContext;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import blade.kit.StringKit;
import blade.kit.base.ThrowableKit;
import blade.kit.log.Logger;
import com.blade.Blade;
import com.blade.Const;
import com.blade.context.BladeWebContext;
import com.blade.render.ModelAndView;
import com.blade.route.Route;
import com.blade.route.RouteHandler;
import com.blade.route.RouteMatcher;
import com.blade.web.http.HttpStatus;
import com.blade.web.http.Path;
import com.blade.web.http.Request;
import com.blade.web.http.Response;
import com.blade.web.http.ResponsePrint;
import com.blade.web.http.wrapper.ServletRequest;
import com.blade.web.http.wrapper.ServletResponse;
/**
* Asynchronous request processor
*
* @author biezhi
* @since 1.0
*/
public class AsynRequestHandler implements Runnable {
private static final Logger LOGGER = Logger.getLogger(AsynRequestHandler.class);
private Blade blade = Blade.me();
private ServletContext servletContext;
static RouteMatcher routeMatcher;
private HttpServletRequest httpRequest;
private HttpServletResponse httpResponse;
private AsyncContext asyncContext;
public AsynRequestHandler(ServletContext servletContext, AsyncContext asyncCtx) {
this.asyncContext = asyncCtx;
this.servletContext = servletContext;
this.httpRequest = (HttpServletRequest) asyncCtx.getRequest();
this.httpResponse = (HttpServletResponse) asyncCtx.getResponse();
}
@Override
public void run(){
Response response = null;
try {
// http method, GET/POST ...
String method = httpRequest.getMethod();
// reuqest uri
String uri = Path.getRelativePath(httpRequest.getRequestURI(), servletContext.getContextPath());
// If it is static, the resource is handed over to the filter
if(null != blade.staticFolder() && blade.staticFolder().length > 0){
if(!filterStaticFolder(uri)){
if(LOGGER.isDebugEnabled()){
LOGGER.debug("Request : " + method + "\t" + uri);
}
String realpath = httpRequest.getServletContext().getRealPath(uri);
ResponsePrint.printStatic(uri, realpath, httpResponse);
return;
}
}
LOGGER.info("Request : " + method + "\t" + uri);
// Create Request
Request request = new ServletRequest(httpRequest);
// Create Response
response = new ServletResponse(httpResponse, blade.render());
// Init Context
BladeWebContext.setContext(servletContext, request, response);
Route route = routeMatcher.getRoute(method, uri);
// If find it
if (route != null) {
request.setRoute(route);
boolean result = false;
// before inteceptor
List befores = routeMatcher.getBefore(uri);
result = invokeInterceptor(request, response, befores);
if(result){
// execute
handle(request, response, route);
if(!request.isAbort()){
// after inteceptor
List afters = routeMatcher.getAfter(uri);
invokeInterceptor(request, response, afters);
}
}
} else {
// Not found
render404(response, uri);
}
asyncContext.complete();
return;
} catch (Exception e) {
String error = ThrowableKit.getStackTraceAsString(e);
LOGGER.error(error);
ThrowableKit.propagate(e);
httpResponse.setStatus(500);
// Write content to the browser
if (!httpResponse.isCommitted()) {
response.html(Const.INTERNAL_ERROR);
asyncContext.complete();
return;
}
}
asyncContext.complete();
return;
}
/**
* 404 view render
*
* @param response response object
* @param uri 404 uri
*/
private void render404(Response response, String uri) {
String view404 = blade.view404();
if(StringKit.isNotBlank(view404)){
ModelAndView modelAndView = new ModelAndView(view404);
modelAndView.add("viewName", uri);
response.render( modelAndView );
} else {
response.status(HttpStatus.NOT_FOUND);
response.html(String.format(Const.VIEW_NOTFOUND, uri));
}
}
/**
* Methods to perform the interceptor
*
* @param request request object
* @param response response object
* @param interceptors execute the interceptor list
* @return Return execute is ok
*/
private boolean invokeInterceptor(Request request, Response response, List interceptors) {
for(Route route : interceptors){
handle(request, response, route);
if(request.isAbort()){
return false;
}
}
return true;
}
/**
* Actual routing method execution
*
* @param request request object
* @param response response object
* @param route route object
*/
private void handle(Request request, Response response, Route route){
Object target = route.getTarget();
if(null == target){
Class clazz = route.getAction().getDeclaringClass();
target = Blade.me().container().getBean(clazz, null);
}
request.initPathParams(route.getPath());
// Init context
BladeWebContext.setContext(servletContext, request, response);
if(target instanceof RouteHandler){
RouteHandler routeHandler = (RouteHandler)target;
routeHandler.handle(request, response);
} else {
Method actionMethod = route.getAction();
// execute
RouteArgument.executeMethod(target, actionMethod, request, response);
}
}
/**
* Filter out the directory
*
* @param uri URI represents the current path, filtering in a static directory
* @return Return false, filter the success; return true, do not filter
*/
private boolean filterStaticFolder(String uri){
int len = blade.staticFolder().length;
for(int i=0; i
