org.teamapps.ux.servlet.WebSocketServerEndpointConfigurator Maven / Gradle / Ivy
/*-
* ========================LICENSE_START=================================
* TeamApps
* ---
* Copyright (C) 2014 - 2023 TeamApps.org
* ---
* 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.
* =========================LICENSE_END==================================
*/
package org.teamapps.ux.servlet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import jakarta.servlet.http.HttpSession;
import jakarta.websocket.HandshakeResponse;
import jakarta.websocket.server.HandshakeRequest;
import jakarta.websocket.server.ServerEndpointConfig;
import java.util.List;
import java.util.Locale;
public class WebSocketServerEndpointConfigurator extends ServerEndpointConfig.Configurator {
private static final Logger LOGGER = LoggerFactory.getLogger(WebSocketServerEndpointConfigurator.class);
public static final String SERVLET_CONTEXT_PROPERTY_NAME = "SERVLET_CONTEXT";
public static final String HTTP_SESSION_PROPERTY_NAME = "HTTP_SESSION";
public static final String USER_AGENT_PROPERTY_NAME = "USER_AGENT";
public static final String LANGUAGE_PROPERTY_NAME = "LANGUAGE";
public static final String CLIENT_IP_PROPERTY_NAME = "CLIENT_IP";
private final WebSocketCommunicationEndpoint webSocketCommunicationEndpoint;
public WebSocketServerEndpointConfigurator(WebSocketCommunicationEndpoint webSocketCommunicationEndpoint) {
this.webSocketCommunicationEndpoint = webSocketCommunicationEndpoint;
}
@Override
public void modifyHandshake(ServerEndpointConfig sec, HandshakeRequest request, HandshakeResponse response) {
HttpSession httpSession = (HttpSession) request.getHttpSession();
String userAgentString = getFirstHeaderOrNull(request, "User-Agent");
String acceptLanguageHeader = getFirstHeaderOrNull(request, "Accept-Language");
if (acceptLanguageHeader == null) {
acceptLanguageHeader = "en";
}
String languageString = Locale.LanguageRange.parse(acceptLanguageHeader).stream()
.map(range -> new Locale(range.getRange()))
.findFirst()
.map(locale -> locale.getLanguage())
.orElse(null);
String proxiedIp = getFirstHeaderOrNull(request, "X-Forwarded-For");
sec.getUserProperties().put(SERVLET_CONTEXT_PROPERTY_NAME, httpSession.getServletContext());
sec.getUserProperties().put(HTTP_SESSION_PROPERTY_NAME, httpSession);
sec.getUserProperties().put(USER_AGENT_PROPERTY_NAME, userAgentString);
sec.getUserProperties().put(LANGUAGE_PROPERTY_NAME, languageString);
sec.getUserProperties().put(CLIENT_IP_PROPERTY_NAME, proxiedIp != null ? proxiedIp : httpSession.getAttribute(CLIENT_IP_PROPERTY_NAME));
}
@Override
public T getEndpointInstance(Class endpointClass) throws InstantiationException {
return (T) webSocketCommunicationEndpoint;
}
private String getFirstHeaderOrNull(HandshakeRequest request, String headerName) {
List headers = request.getHeaders().get(headerName);
if (headers == null || headers.isEmpty()) {
return null;
} else {
return headers.get(0);
}
}
}