Removed file

Former-commit-id: f8c3fca311db1b659cdeb44a6acac0782a5b2b23

src/main/java/com/mxgraph/online/CacheServlet.java

@@ -1,442 +0,0 @@
-/**
- * $Id: ProxyServlet.java,v 1.4 2013/12/13 13:18:11 david Exp $
- * Copyright (c) 2011-2012, JGraph Ltd
- */
-package com.mxgraph.online;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.PrintWriter;
-import java.io.Serializable;
-import java.text.DateFormat;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-
-import javax.cache.Cache;
-import javax.cache.CacheException;
-import javax.cache.CacheFactory;
-import javax.cache.CacheManager;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-
-import com.google.appengine.api.memcache.MemcacheService;
-import com.google.appengine.api.memcache.MemcacheServiceFactory;
-import com.google.appengine.api.memcache.Stats;
-import com.google.appengine.api.memcache.stdimpl.GCacheFactory;
-import com.pusher.rest.Pusher;
-
-/**
- * Servlet implementation ProxyServlet
- */
-@SuppressWarnings("serial")
-public class CacheServlet extends HttpServlet
-{
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static final String PUSHER_CONFIG_FILE_PATH = "/WEB-INF/pusher.properties";
-
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static final DateFormat dateFormat = new SimpleDateFormat(
-			"yyyy-MM-dd HH:mm:ss.SSS");
-
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static final boolean debugOutput = false;
-
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static final int expirationDelta = 300;
-
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static final int maxCacheSize = 1000000;
-
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static Pusher pusher = null;
-
-	/**
-	 * Path component under war/ to locate iconfinder_key file.
-	 */
-	protected static Cache cache;
-
-	static
-	{
-		try
-		{
-			CacheFactory cacheFactory = CacheManager.getInstance()
-					.getCacheFactory();
-			Map<Object, Object> properties = new HashMap<>();
-			properties.put(MemcacheService.SetPolicy.ADD_ONLY_IF_NOT_PRESENT,
-					true);
-			properties.put(GCacheFactory.EXPIRATION_DELTA, expirationDelta);
-			cache = cacheFactory.createCache(properties);
-		}
-		catch (CacheException e)
-		{
-			e.printStackTrace();
-		}
-	}
-
-	/**
-	 * @see HttpServlet#HttpServlet()
-	 */
-	public CacheServlet()
-	{
-		super();
-	};
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected Pusher getPusher() throws IOException
-	{
-		//log.log(severityLevel, "CLIENT-LOG:" + message);
-
-		if (pusher == null)
-		{
-			InputStream input = null;
-
-			try
-			{
-				input = getServletContext()
-						.getResourceAsStream(PUSHER_CONFIG_FILE_PATH);
-
-				// load a properties file
-				Properties prop = new Properties();
-				prop.load(input);
-
-				pusher = new Pusher(prop.getProperty("app_id"),
-						prop.getProperty("key"), prop.getProperty("secret"));
-				pusher.setCluster(prop.getProperty("cluster"));
-				pusher.setEncrypted(true);
-			}
-			finally
-			{
-				if (input != null)
-				{
-					input.close();
-				}
-			}
-		}
-
-		return pusher;
-	}
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected void doGet(HttpServletRequest request,
-			HttpServletResponse response) throws ServletException, IOException
-	{
-		try
-		{
-			String qs = request.getQueryString();
-			String ref = request.getHeader("referer");
-			boolean stats = qs != null && qs.equals("stats");
-			boolean alive = qs != null && qs.equals("alive");
-
-			if (stats || alive || (ref != null && ref.toLowerCase()
-					.matches("https?://([a-z0-9,-]+[.])*draw[.]io/.*")))
-			{
-				PrintWriter writer = response.getWriter();
-				response.setCharacterEncoding("UTF-8");
-
-				if (stats)
-				{
-					response.setContentType("text/plain");
-
-					Stats s = MemcacheServiceFactory.getMemcacheService()
-							.getStatistics();
-					writer.println("timestamp: " + new Date().toString());
-					writer.println("hit count: " + s.getHitCount());
-					writer.println("miss count: " + s.getMissCount());
-					writer.println("item count: " + s.getItemCount());
-					writer.println(
-							"total item bytes: " + s.getTotalItemBytes());
-					writer.println("bytes returned for hits: "
-							+ s.getBytesReturnedForHits());
-					writer.println("max time without access: "
-							+ s.getMaxTimeWithoutAccess());
-
-					response.setStatus(HttpServletResponse.SC_OK);
-				}
-				else
-				{
-					response.addHeader("Access-Control-Allow-Origin",
-							ref.toLowerCase().substring(0,
-									ref.indexOf(".draw.io/") + 8));
-
-					if (alive)
-					{
-						response.setStatus(HttpServletResponse.SC_OK);
-					}
-					else
-					{
-						// Disables wire-compression
-						response.setContentType("application/octet-stream");
-						String id = request.getParameter("id");
-	
-						if (id != null)
-						{
-							try
-							{
-								writer.print(getPatches(id, request));
-								response.setStatus(HttpServletResponse.SC_OK);
-							}
-							catch (UnauthorizedException e)
-							{
-								response.setStatus(
-										HttpServletResponse.SC_UNAUTHORIZED);
-							}
-						}
-						else
-						{
-							response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
-						}
-					}
-				}
-
-				writer.flush();
-				writer.close();
-			}
-			else
-			{
-				response.setStatus(HttpServletResponse.SC_FORBIDDEN);
-			}
-		}
-		catch (Exception e)
-		{
-			response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
-		}
-	}
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected String getPatches(String id, HttpServletRequest request)
-			throws UnauthorizedException
-	{
-		String from = request.getParameter("from");
-		String to = request.getParameter("to");
-		String secret = request.getParameter("secret");
-		String data = "[]";
-
-		if (from != null && to != null)
-		{
-			List<String> values = new ArrayList<String>();
-			HashSet<String> seen = new HashSet<String>();
-			String current = from;
-
-			while (!seen.contains(current))
-			{
-				CacheEntry entry = (CacheEntry) cache.get(id + ":" + current);
-
-				if (entry != null)
-				{
-					seen.add(current);
-					current = entry.getEtag();
-					values.add("\"" + entry.getData() + "\"");
-
-					if (current.equals(to))
-					{
-						// Compares secret
-						if (entry.getSecret() != null
-								&& !entry.getSecret().equals(secret))
-						{
-							throw new UnauthorizedException();
-						}
-						else
-						{
-							break;
-						}
-					}
-				}
-				else
-				{
-					values.clear();
-					break;
-				}
-			}
-
-			data = "[" + String.join(",", values) + "]";
-		}
-
-		debug("getPatches id=" + id + " from=" + from + " to=" + to + " data="
-				+ data);
-
-		return data;
-	}
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected void doPost(HttpServletRequest request,
-			HttpServletResponse response) throws ServletException, IOException
-	{
-		try
-		{
-			String ref = request.getHeader("referer");
-
-			if (ref != null && ref.toLowerCase()
-					.matches("https?://([a-z0-9,-]+[.])*draw[.]io/.*"))
-			{
-				String id = request.getParameter("id");
-
-				if (id != null)
-				{
-					response.addHeader("Access-Control-Allow-Origin",
-							ref.toLowerCase().substring(0,
-									ref.indexOf(".draw.io/") + 8));
-
-					sendMessage(id, request);
-					addPatch(id, request);
-
-					PrintWriter writer = response.getWriter();
-					writer.println("<ok/>");
-					writer.flush();
-					writer.close();
-
-					response.setStatus(HttpServletResponse.SC_OK);
-				}
-				else
-				{
-					response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
-				}
-			}
-			else
-			{
-				response.setStatus(HttpServletResponse.SC_FORBIDDEN);
-			}
-		}
-		catch (Exception e)
-		{
-			response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
-		}
-	}
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected void addPatch(String id, HttpServletRequest request)
-	{
-		String data = request.getParameter("data");
-		String secret = request.getParameter("secret");
-		String from = request.getParameter("from");
-		String to = request.getParameter("to");
-
-		if (from != null && to != null && data != null
-				&& data.length() < maxCacheSize)
-		{
-			cache.put(id + ":" + from, new CacheEntry(to, data, secret));
-			debug("addPatch id=" + id + " from=" + from + " to=" + to + " data="
-					+ data);
-		}
-	}
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected void sendMessage(String id, HttpServletRequest request)
-			throws IOException
-	{
-		String msg = request.getParameter("msg");
-
-		if (msg != null)
-		{
-			String sid = request.getParameter("sid");
-			getPusher().trigger(id, "changed", msg, sid);
-			debug("sendMessage id=" + id + " msg=" + msg);
-		}
-	}
-
-	/**
-	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
-	 */
-	protected void debug(String msg)
-	{
-		if (debugOutput)
-		{
-			System.out.println(msg);
-		}
-	}
-
-	/**
-	 * Cache entry definition.
-	 */
-	public static class CacheEntry implements Serializable
-	{
-		/**
-		 * Holds the etag.
-		 */
-		private String etag;
-
-		/**
-		 * Holds the data.
-		 */
-		private String data;
-
-		/**
-		 * Holds the optional secret.
-		 */
-		private String secret;
-
-		/**
-		 * Returns the etag.
-		 */
-		public String getEtag()
-		{
-			return etag;
-		}
-
-		/**
-		 * Returns the data.
-		 */
-		public String getData()
-		{
-			return data;
-		}
-
-		/**
-		 * Returns the data.
-		 */
-		public String getSecret()
-		{
-			return secret;
-		}
-
-		/**
-		 * Constructs a new cache entry.
-		 */
-		public CacheEntry(String etag, String data, String secret)
-		{
-			this.etag = etag;
-			this.data = data;
-			this.secret = secret;
-		}
-
-	}
-
-	/**
-	 * Cache entry definition.
-	 */
-	public static class UnauthorizedException extends Exception
-	{
-	}
-
-}