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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.magentatv.internal.network;
  14
  15 import static org.openhab.binding.magentatv.internal.MagentaTVBindingConstants.*;
  16 import static org.openhab.binding.magentatv.internal.MagentaTVUtil.substringBetween;
  17
  18 import java.io.IOException;
  19 import java.nio.charset.StandardCharsets;
  20 import java.util.Map;
  21 import java.util.Scanner;
  22
  23 import javax.servlet.ServletException;
  24 import javax.servlet.http.HttpServlet;
  25 import javax.servlet.http.HttpServletRequest;
  26 import javax.servlet.http.HttpServletResponse;
  27
  28 import org.eclipse.jdt.annotation.NonNullByDefault;
  29 import org.eclipse.jdt.annotation.Nullable;
  30 import org.openhab.binding.magentatv.internal.MagentaTVHandlerFactory;
  31 import org.osgi.service.component.annotations.Activate;
  32 import org.osgi.service.component.annotations.Component;
  33 import org.osgi.service.component.annotations.ConfigurationPolicy;
  34 import org.osgi.service.component.annotations.Reference;
  35 import org.osgi.service.http.HttpService;
  36 import org.osgi.service.http.NamespaceException;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 /**
  41  * Main OSGi service and HTTP servlet for MagentaTV NOTIFY.
  42  *
  43  * @author Markus Michels - Initial contribution
  44  */
  45 @NonNullByDefault
  46 @Component(service = HttpServlet.class, configurationPolicy = ConfigurationPolicy.OPTIONAL)
  47 public class MagentaTVNotifyServlet extends HttpServlet {
  48     private static final long serialVersionUID = 2119809008606371618L;
  49     private final Logger logger = LoggerFactory.getLogger(MagentaTVNotifyServlet.class);
  50
  51     private final MagentaTVHandlerFactory handlerFactory;
  52
  53     @Activate
  54     public MagentaTVNotifyServlet(@Reference MagentaTVHandlerFactory handlerFactory, @Reference HttpService httpService,
  55             Map<String, Object> config) {
  56         this.handlerFactory = handlerFactory;
  57         try {
  58             httpService.registerServlet(PAIRING_NOTIFY_URI, this, null, httpService.createDefaultHttpContext());
  59             logger.debug("Servlet started at {}", PAIRING_NOTIFY_URI);
  60             if (!handlerFactory.getNotifyServletStatus()) {
  61                 handlerFactory.setNotifyServletStatus(true);
  62             }
  63         } catch (ServletException | NamespaceException e) {
  64             logger.warn("Could not start MagentaTVNotifyServlet: {}", e.getMessage());
  65         }
  66     }
  67
  68     /**
  69      * Notify servlet handler (will be called by jetty
  70      *
  71      * Format of SOAP message:
  72      * <e:propertyset xmlns:e="urn:schemas-upnp-org:event-1-0"> <e:property>
  73      * <uniqueDeviceID>1C18548DAF7DE9BC231249DB28D2A650</uniqueDeviceID>
  74      * </e:property> <e:property> <messageBody>X-pairingCheck:5218C0AA</messageBody>
  75      * </e:property> </e:propertyset>
  76      *
  77      * Format of event message: <?xml version="1.0"?>
  78      * <e:propertyset xmlns:e="urn:schemas-upnp-org:event-1-0"> <e:property>
  79      * <STB_Mac>AC6FBB61B1E5</STB_Mac> </e:property> <e:property>
  80      * <STB_playContent>{&quot;new_play_mode&quot;:0,&quot;playBackState&quot;:1,&
  81      * quot;mediaType&quot;:1,&quot;mediaCode&quot;:&quot;3682&quot;}</
  82      * STB_playContent> </e:property> </e:propertyset>
  83      *
  84      * @param request
  85      * @param resp
  86      *
  87      * @throws ServletException, IOException
  88      */
  89     @Override
  90     protected void service(@Nullable HttpServletRequest request, @Nullable HttpServletResponse response)
  91             throws ServletException, IOException {
  92
  93         String data = inputStreamToString(request);
  94         try {
  95             if ((request == null) || (response == null)) {
  96                 return;
  97             }
  98             String ipAddress = request.getHeader("HTTP_X_FORWARDED_FOR");
  99             if (ipAddress == null) {
 100                 ipAddress = request.getRemoteAddr();
 101             }
 102             String path = request.getRequestURI();
 103             logger.trace("Reqeust from {}:{}{} ({}, {})", ipAddress, request.getRemotePort(), path,
 104                     request.getRemoteHost(), request.getProtocol());
 105             if (!path.equalsIgnoreCase(PAIRING_NOTIFY_URI)) {
 106                 logger.debug("Invalid request received - path = {}", path);
 107                 return;
 108             }
 109
 110             if (data.contains(NOTIFY_PAIRING_CODE)) {
 111                 String deviceId = data.substring(data.indexOf("<uniqueDeviceID>") + "<uniqueDeviceID>".length(),
 112                         data.indexOf("</uniqueDeviceID>"));
 113                 String pairingCode = data.substring(data.indexOf(NOTIFY_PAIRING_CODE) + NOTIFY_PAIRING_CODE.length(),
 114                         data.indexOf("</messageBody>"));
 115                 logger.debug("Pairing code {} received for deviceID {}", pairingCode, deviceId);
 116                 if (!handlerFactory.notifyPairingResult(deviceId, ipAddress, pairingCode)) {
 117                     logger.trace("Pairing data={}", data);
 118                 }
 119             } else {
 120                 if (data.contains("STB_")) {
 121                     data = data.replaceAll("&quot;", "\"");
 122                     String stbMac = substringBetween(data, "<STB_Mac>", "</STB_Mac>");
 123                     String stbEvent = "";
 124                     if (data.contains("<STB_playContent>")) {
 125                         stbEvent = substringBetween(data, "<STB_playContent>", "</STB_playContent>");
 126                     } else if (data.contains("<STB_EitChanged>")) {
 127                         stbEvent = substringBetween(data, "<STB_EitChanged>", "</STB_EitChanged>");
 128                     } else {
 129                         logger.debug("Unknown STB event: {}", data);
 130                     }
 131                     if (!stbEvent.isEmpty()) {
 132                         if (!handlerFactory.notifyMREvent(stbMac, stbEvent)) {
 133                             logger.debug("Event not processed, data={}", data);
 134                         }
 135                     }
 136                 }
 137             }
 138         } catch (RuntimeException e) {
 139             logger.debug("Unable to process http request, data={}", data != null ? data : "<empty>");
 140         } finally {
 141             // send response
 142             if (response != null) {
 143                 response.setCharacterEncoding(StandardCharsets.UTF_8.name());
 144                 response.getWriter().write("");
 145             }
 146         }
 147     }
 148
 149     @SuppressWarnings("resource")
 150     private String inputStreamToString(@Nullable HttpServletRequest request) throws IOException {
 151         if (request == null) {
 152             return "";
 153         }
 154         Scanner scanner = new Scanner(request.getInputStream()).useDelimiter("\\A");
 155         return scanner.hasNext() ? scanner.next() : "";
 156     }
 157 }