git.basschouten.com Git - openhab-addons.git/blob

   1 /**
   2  * Copyright (c) 2010-2022 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.amazonechocontrol.internal;
  14
  15 import static org.openhab.binding.amazonechocontrol.internal.AmazonEchoControlBindingConstants.BINDING_NAME;
  16
  17 import java.io.IOException;
  18 import java.net.URLEncoder;
  19 import java.util.ArrayList;
  20 import java.util.List;
  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.core.thing.Thing;
  30 import org.osgi.service.http.HttpService;
  31 import org.osgi.service.http.NamespaceException;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34 import org.unbescape.html.HtmlEscape;
  35
  36 /**
  37  * This servlet provides the base navigation page, with hyperlinks for the defined account things
  38  *
  39  * @author Michael Geramb - Initial Contribution
  40  */
  41 @NonNullByDefault
  42 public class BindingServlet extends HttpServlet {
  43     private static final long serialVersionUID = -1453738923337413163L;
  44
  45     private final Logger logger = LoggerFactory.getLogger(BindingServlet.class);
  46
  47     String servletUrlWithoutRoot;
  48     String servletUrl;
  49     HttpService httpService;
  50
  51     List<Thing> accountHandlers = new ArrayList<>();
  52
  53     public BindingServlet(HttpService httpService) {
  54         this.httpService = httpService;
  55         servletUrlWithoutRoot = "amazonechocontrol";
  56         servletUrl = "/" + servletUrlWithoutRoot;
  57         try {
  58             httpService.registerServlet(servletUrl, this, null, httpService.createDefaultHttpContext());
  59         } catch (NamespaceException | ServletException e) {
  60             logger.warn("Register servlet fails", e);
  61         }
  62     }
  63
  64     public void addAccountThing(Thing accountThing) {
  65         synchronized (accountHandlers) {
  66             accountHandlers.add(accountThing);
  67         }
  68     }
  69
  70     public void removeAccountThing(Thing accountThing) {
  71         synchronized (accountHandlers) {
  72             accountHandlers.remove(accountThing);
  73         }
  74     }
  75
  76     public void dispose() {
  77         httpService.unregister(servletUrl);
  78     }
  79
  80     @Override
  81     protected void doGet(@Nullable HttpServletRequest req, @Nullable HttpServletResponse resp)
  82             throws ServletException, IOException {
  83         if (req == null) {
  84             return;
  85         }
  86         if (resp == null) {
  87             return;
  88         }
  89         String requestUri = req.getRequestURI();
  90         if (requestUri == null) {
  91             return;
  92         }
  93         String uri = requestUri.substring(servletUrl.length());
  94         String queryString = req.getQueryString();
  95         if (queryString != null && queryString.length() > 0) {
  96             uri += "?" + queryString;
  97         }
  98         logger.debug("doGet {}", uri);
  99
 100         if (!"/".equals(uri)) {
 101             String newUri = req.getServletPath() + "/";
 102             resp.sendRedirect(newUri);
 103             return;
 104         }
 105
 106         StringBuilder html = new StringBuilder();
 107         html.append("<html><head><title>" + HtmlEscape.escapeHtml4(BINDING_NAME) + "</title><head><body>");
 108         html.append("<h1>" + HtmlEscape.escapeHtml4(BINDING_NAME) + "</h1>");
 109
 110         synchronized (accountHandlers) {
 111             if (accountHandlers.isEmpty()) {
 112                 html.append("No Account thing created.");
 113             } else {
 114                 for (Thing accountHandler : accountHandlers) {
 115                     String url = URLEncoder.encode(accountHandler.getUID().getId(), "UTF8");
 116                     html.append("<a href='./" + url + " '>" + HtmlEscape.escapeHtml4(accountHandler.getLabel())
 117                             + "</a><br>");
 118                 }
 119             }
 120         }
 121         html.append("</body></html>");
 122
 123         resp.addHeader("content-type", "text/html;charset=UTF-8");
 124         try {
 125             resp.getWriter().write(html.toString());
 126         } catch (IOException e) {
 127             logger.warn("return html failed with uri syntax error", e);
 128         }
 129     }
 130 }