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   1 /**
   2  * Copyright (c) 2010-2021 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.util.Map;
  20 import java.util.Scanner;
  21
  22 import javax.servlet.ServletException;
  23 import javax.servlet.http.HttpServlet;
  24 import javax.servlet.http.HttpServletRequest;
  25 import javax.servlet.http.HttpServletResponse;
  26
  27 import org.eclipse.jdt.annotation.NonNullByDefault;
  28 import org.eclipse.jdt.annotation.Nullable;
  29 import org.openhab.binding.magentatv.internal.MagentaTVHandlerFactory;
  30 import org.osgi.service.component.annotations.Activate;
  31 import org.osgi.service.component.annotations.Component;
  32 import org.osgi.service.component.annotations.ConfigurationPolicy;
  33 import org.osgi.service.component.annotations.Reference;
  34 import org.osgi.service.http.HttpService;
  35 import org.osgi.service.http.NamespaceException;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 /**
  40  * Main OSGi service and HTTP servlet for MagentaTV NOTIFY.
  41  *
  42  * @author Markus Michels - Initial contribution
  43  */
  44 @NonNullByDefault
  45 @Component(service = HttpServlet.class, configurationPolicy = ConfigurationPolicy.OPTIONAL)
  46 public class MagentaTVNotifyServlet extends HttpServlet {
  47     private static final long serialVersionUID = 2119809008606371618L;
  48     private final Logger logger = LoggerFactory.getLogger(MagentaTVNotifyServlet.class);
  49
  50     private final MagentaTVHandlerFactory handlerFactory;
  51
  52     @Activate
  53     public MagentaTVNotifyServlet(@Reference MagentaTVHandlerFactory handlerFactory, @Reference HttpService httpService,
  54             Map<String, Object> config) {
  55         this.handlerFactory = handlerFactory;
  56         try {
  57             httpService.registerServlet(PAIRING_NOTIFY_URI, this, null, httpService.createDefaultHttpContext());
  58             logger.debug("Servlet started at {}", PAIRING_NOTIFY_URI);
  59             if (!handlerFactory.getNotifyServletStatus()) {
  60                 handlerFactory.setNotifyServletStatus(true);
  61             }
  62         } catch (ServletException | NamespaceException e) {
  63             logger.warn("Could not start MagentaTVNotifyServlet: {}", e.getMessage());
  64         }
  65     }
  66
  67     /**
  68      * Notify servlet handler (will be called by jetty
  69      *
  70      * Format of SOAP message:
  71      * <e:propertyset xmlns:e="urn:schemas-upnp-org:event-1-0"> <e:property>
  72      * <uniqueDeviceID>1C18548DAF7DE9BC231249DB28D2A650</uniqueDeviceID>
  73      * </e:property> <e:property> <messageBody>X-pairingCheck:5218C0AA</messageBody>
  74      * </e:property> </e:propertyset>
  75      *
  76      * Format of event message: <?xml version="1.0"?>
  77      * <e:propertyset xmlns:e="urn:schemas-upnp-org:event-1-0"> <e:property>
  78      * <STB_Mac>AC6FBB61B1E5</STB_Mac> </e:property> <e:property>
  79      * <STB_playContent>{&quot;new_play_mode&quot;:0,&quot;playBackState&quot;:1,&
  80      * quot;mediaType&quot;:1,&quot;mediaCode&quot;:&quot;3682&quot;}</
  81      * STB_playContent> </e:property> </e:propertyset>
  82      *
  83      * @param request
  84      * @param resp
  85      *
  86      * @throws ServletException, IOException
  87      */
  88     @Override
  89     protected void service(@Nullable HttpServletRequest request, @Nullable HttpServletResponse response)
  90             throws ServletException, IOException {
  91
  92         String data = inputStreamToString(request);
  93         try {
  94             if ((request == null) || (response == null)) {
  95                 return;
  96             }
  97             String ipAddress = request.getHeader("HTTP_X_FORWARDED_FOR");
  98             if (ipAddress == null) {
  99                 ipAddress = request.getRemoteAddr();
 100             }
 101             String path = request.getRequestURI();
 102             logger.trace("Reqeust from {}:{}{} ({}, {})", ipAddress, request.getRemotePort(), path,
 103                     request.getRemoteHost(), request.getProtocol());
 104             if (!path.equalsIgnoreCase(PAIRING_NOTIFY_URI)) {
 105                 logger.debug("Invalid request received - path = {}", path);
 106                 return;
 107             }
 108
 109             if (data.contains(NOTIFY_PAIRING_CODE)) {
 110                 String deviceId = data.substring(data.indexOf("<uniqueDeviceID>") + "<uniqueDeviceID>".length(),
 111                         data.indexOf("</uniqueDeviceID>"));
 112                 String pairingCode = data.substring(data.indexOf(NOTIFY_PAIRING_CODE) + NOTIFY_PAIRING_CODE.length(),
 113                         data.indexOf("</messageBody>"));
 114                 logger.debug("Pairing code {} received for deviceID {}", pairingCode, deviceId);
 115                 if (!handlerFactory.notifyPairingResult(deviceId, ipAddress, pairingCode)) {
 116                     logger.trace("Pairing data={}", data);
 117                 }
 118             } else {
 119                 if (data.contains("STB_")) {
 120                     data = data.replaceAll("&quot;", "\"");
 121                     String stbMac = substringBetween(data, "<STB_Mac>", "</STB_Mac>");
 122                     String stbEvent = "";
 123                     if (data.contains("<STB_playContent>")) {
 124                         stbEvent = substringBetween(data, "<STB_playContent>", "</STB_playContent>");
 125                     } else if (data.contains("<STB_EitChanged>")) {
 126                         stbEvent = substringBetween(data, "<STB_EitChanged>", "</STB_EitChanged>");
 127                     } else {
 128                         logger.debug("Unknown STB event: {}", data);
 129                     }
 130                     if (!stbEvent.isEmpty()) {
 131                         if (!handlerFactory.notifyMREvent(stbMac, stbEvent)) {
 132                             logger.debug("Event not processed, data={}", data);
 133                         }
 134                     }
 135                 }
 136             }
 137         } catch (RuntimeException e) {
 138             logger.debug("Unable to process http request, data={}", data != null ? data : "<empty>");
 139         } finally {
 140             // send response
 141             if (response != null) {
 142                 response.setCharacterEncoding(UTF_8);
 143                 response.getWriter().write("");
 144             }
 145         }
 146     }
 147
 148     @SuppressWarnings("resource")
 149     private String inputStreamToString(@Nullable HttpServletRequest request) throws IOException {
 150         if (request == null) {
 151             return "";
 152         }
 153         Scanner scanner = new Scanner(request.getInputStream()).useDelimiter("\\A");
 154         return scanner.hasNext() ? scanner.next() : "";
 155     }
 156 }