/*
* Copyright 2002-2014 the original author or authors.
*
* 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 org.springframework.web.socket.sockjs.support;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.http.server.ServletServerHttpResponse;
import org.springframework.util.Assert;
import org.springframework.web.HttpRequestHandler;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.handler.ExceptionWebSocketHandlerDecorator;
import org.springframework.web.socket.handler.LoggingWebSocketHandlerDecorator;
import org.springframework.web.socket.sockjs.SockJsException;
import org.springframework.web.socket.sockjs.SockJsService;
/**
* An {@link HttpRequestHandler} that allows mapping a {@link SockJsService} to requests
* in a Servlet container.
*
* @author Rossen Stoyanchev
* @since 4.0
*/
public class SockJsHttpRequestHandler implements HttpRequestHandler {
// No logging: HTTP transports too verbose and we don't know enough to log anything of value
private final SockJsService sockJsService;
private final WebSocketHandler webSocketHandler;
/**
* Create a new SockJsHttpRequestHandler.
* @param sockJsService the SockJS service
* @param webSocketHandler the websocket handler
*/
public SockJsHttpRequestHandler(SockJsService sockJsService, WebSocketHandler webSocketHandler) {
Assert.notNull(sockJsService, "sockJsService must not be null");
Assert.notNull(webSocketHandler, "webSocketHandler must not be null");
this.sockJsService = sockJsService;
this.webSocketHandler =
new ExceptionWebSocketHandlerDecorator(new LoggingWebSocketHandlerDecorator(webSocketHandler));
}
/**
* Return the {@link SockJsService}.
*/
public SockJsService getSockJsService() {
return this.sockJsService;
}
/**
* Return the {@link WebSocketHandler}.
*/
public WebSocketHandler getWebSocketHandler() {
return this.webSocketHandler;
}
@Override
public void handleRequest(HttpServletRequest servletRequest, HttpServletResponse servletResponse)
throws ServletException, IOException {
ServerHttpRequest request = new ServletServerHttpRequest(servletRequest);
ServerHttpResponse response = new ServletServerHttpResponse(servletResponse);
try {
this.sockJsService.handleRequest(request, response, getSockJsPath(servletRequest), this.webSocketHandler);
}
catch (Throwable ex) {
throw new SockJsException("Uncaught failure in SockJS request, uri=" + request.getURI(), ex);
}
}
private String getSockJsPath(HttpServletRequest servletRequest) {
String attribute = HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE;
String path = (String) servletRequest.getAttribute(attribute);
return ((path.length() > 0) && (path.charAt(0) != '/')) ? "/" + path : path;
}
}