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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.neeo.internal.handler;
  14
  15 import java.io.IOException;
  16 import java.util.concurrent.ScheduledExecutorService;
  17 import java.util.function.Consumer;
  18 import java.util.stream.Collectors;
  19
  20 import javax.servlet.http.HttpServlet;
  21 import javax.servlet.http.HttpServletRequest;
  22 import javax.servlet.http.HttpServletResponse;
  23
  24 import org.eclipse.jdt.annotation.NonNullByDefault;
  25 import org.eclipse.jdt.annotation.Nullable;
  26 import org.eclipse.jetty.client.HttpClient;
  27 import org.eclipse.jetty.http.HttpStatus;
  28 import org.openhab.binding.neeo.internal.net.HttpRequest;
  29 import org.openhab.binding.neeo.internal.net.HttpResponse;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 /**
  34  * This servlet handles the forward actions events from the NEEO Brain. The forward actions will be posted to the
  35  * callback and then will be forwarded on to any URLs lised in {@link #forwardChain}
  36  *
  37  * @author Tim Roberts - Initial contribution
  38  *
  39  */
  40 @NonNullByDefault
  41 @SuppressWarnings("serial")
  42 public class NeeoForwardActionsServlet extends HttpServlet {
  43
  44     /** The logger */
  45     private final Logger logger = LoggerFactory.getLogger(NeeoForwardActionsServlet.class);
  46
  47     /** The event publisher */
  48     private final Consumer<String> callback;
  49
  50     /** The forwarding chain */
  51     private final @Nullable String forwardChain;
  52
  53     private final HttpClient httpClient;
  54
  55     /** The scheduler to use to schedule recipe execution */
  56     private final ScheduledExecutorService scheduler;
  57
  58     /**
  59      * Creates the servlet the will process forward action events from the NEEO brain.
  60      *
  61      * @param scheduler a non-null {@link ScheduledExecutorService} to schedule forward actions
  62      * @param callback a non-null String consumer
  63      * @param forwardChain a possibly null, possibly empty forwarding chain
  64      */
  65     NeeoForwardActionsServlet(ScheduledExecutorService scheduler, Consumer<String> callback,
  66             @Nullable String forwardChain, HttpClient httpClient) {
  67         super();
  68
  69         this.scheduler = scheduler;
  70         this.callback = callback;
  71         this.forwardChain = forwardChain;
  72         this.httpClient = httpClient;
  73     }
  74
  75     /**
  76      * Processes the post action from the NEEO brain. Simply gets the specified json and then forwards it on (if
  77      * needed)
  78      *
  79      * @param req the non-null request
  80      * @param resp the non-null response
  81      */
  82     @Override
  83     protected void doPost(@Nullable HttpServletRequest req, @Nullable HttpServletResponse resp) throws IOException {
  84         if (req == null || resp == null) {
  85             logger.warn("doPost called with req={}, resp={}, non-null required.", req, resp);
  86             return;
  87         }
  88
  89         final String json = req.getReader().lines().collect(Collectors.joining("\n"));
  90         logger.debug("handleForwardActions {}", json);
  91
  92         callback.accept(json);
  93
  94         String forwardChain = this.forwardChain;
  95         if (forwardChain != null && !forwardChain.isEmpty()) {
  96             scheduler.execute(() -> {
  97                 try (final HttpRequest request = new HttpRequest(httpClient)) {
  98                     for (final String forwardUrl : forwardChain.split(",")) {
  99                         if (!forwardUrl.isEmpty()) {
 100                             final HttpResponse httpResponse = request.sendPostJsonCommand(forwardUrl, json);
 101                             if (httpResponse.getHttpCode() != HttpStatus.OK_200) {
 102                                 logger.debug("Cannot forward event {} to {}: {}", json, forwardUrl,
 103                                         httpResponse.getHttpCode());
 104                             }
 105                         }
 106                     }
 107                 }
 108             });
 109         }
 110     }
 111 }