Rename & Repackage

2006Scape file_server/.gitignore

@@ -0,0 +1,4 @@
+/bin/
+*.iml
+/target/
+file_server-1.0-jar-with-dependencies.jar

2006Scape file_server/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>2006Scape</artifactId>
+        <groupId>com.rs2</groupId>
+        <version>1.0</version>
+    </parent>
+
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>file_server</artifactId>
+    <version>1.0</version>
+    <packaging>jar</packaging>
+
+    <repositories>
+        <repository>
+            <id>libs-local</id>
+            <name>libs</name>
+            <url>file://${project.basedir}/libs</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.1</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/org.apache.mina/mina-core -->
+        <dependency>
+            <groupId>org.apache.mina</groupId>
+            <artifactId>mina-core</artifactId>
+            <version>1.1.7</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.16</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/io.netty/netty -->
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty</artifactId>
+            <version>3.6.6.Final</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.5.8</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-nop -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-nop</artifactId>
+            <version>1.5.8</version>
+            <scope>test</scope>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/com.thoughtworks.xstream/xstream -->
+        <dependency>
+            <groupId>com.thoughtworks.xstream</groupId>
+            <artifactId>xstream</artifactId>
+            <version>1.4.10-java7</version>
+        </dependency>
+        <dependency>
+            <groupId>javac</groupId>
+            <artifactId>javac</artifactId>
+            <version>1.0</version>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/libs/javac++.jar</systemPath>
+        </dependency>
+        <dependency>
+            <groupId>org.xmlpull.v1</groupId>
+            <artifactId>xpp3</artifactId>
+            <version>1.1.4c</version>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/libs/xpp3-1.1.4c.jar</systemPath>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>org.apollo.jagcached.FileServer</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id> <!-- this is used for inheritance merges -->
+                        <phase>package</phase> <!-- bind to the packaging phase -->
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

2006Scape file_server/runFileServer.sh

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+echo This is meant to be run by the live server admin! You probably don\'t want to do this!
+for i in {0..50}
+do
+    cp target/file_server-1.0-jar-with-dependencies.jar ./fserver.jar
+    java -jar fserver.jar
+done

2006Scape file_server/src/main/java/org/apollo/jagcached/Constants.java

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+package org.apollo.jagcached;
+
+/**
+ * 2006Scape Development
+ * 
+ * @author Ryley Kimmel <ryley.kimmel@live.com>
+ * Jul 9, 2013
+ * Constants.java
+ * 
+ * @see java.lang.Object
+ */
+public final class Constants {
+
+	/**
+	 * The directory of the file system.
+	 */
+	public static final String FILE_SYSTEM_DIR = "./cache/";
+
+	/**
+	 * Default private constructor to prevent instantiation.
+	 */
+	private Constants() {
+		super();
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/FileServer.java

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+package org.apollo.jagcached;
+
+import java.io.File;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+
+import org.apollo.jagcached.dispatch.RequestWorkerPool;
+import org.apollo.jagcached.net.FileServerHandler;
+import org.apollo.jagcached.net.HttpPipelineFactory;
+import org.apollo.jagcached.net.JagGrabPipelineFactory;
+import org.apollo.jagcached.net.NetworkConstants;
+import org.apollo.jagcached.net.OnDemandPipelineFactory;
+import org.jboss.netty.bootstrap.ServerBootstrap;
+import org.jboss.netty.channel.ChannelPipelineFactory;
+import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
+import org.jboss.netty.util.HashedWheelTimer;
+import org.jboss.netty.util.Timer;
+
+/**
+ * The core class of the file server.
+ * @author Graham
+ */
+public final class FileServer {
+	
+	/**
+	 * The logger for this class.
+	 */
+	private static final Logger logger = Logger.getLogger(FileServer.class.getName());
+
+	/**
+	 * The entry point of the application.
+	 * @param args The command-line arguments.
+	 */
+	public static void main(String[] args) {
+		try {
+			new FileServer().start();
+		} catch (Throwable t) {
+			logger.log(Level.SEVERE, "Error starting server.", t);
+		}
+	}
+	
+	/**
+	 * The executor service.
+	 */
+	private final ExecutorService service = Executors.newCachedThreadPool();
+	
+	/**
+	 * The request worker pool.
+	 */
+	private final RequestWorkerPool pool = new RequestWorkerPool();
+	
+	/**
+	 * The file server event handler.
+	 */
+	private final FileServerHandler handler = new FileServerHandler();
+	
+	/**
+	 * The timer used for idle checking.
+	 */
+	private final Timer timer = new HashedWheelTimer();
+	
+	/**
+	 * Starts the file server.
+	 * @throws Exception if an error occurs.
+	 */
+	public void start() throws Exception {
+		if (!new File("cache").exists())
+		{
+			System.out.println("************************************");
+			System.out.println("************************************");
+			System.out.println("************************************");
+			System.out.println("WARNING: I could not find the /cache folder. You are LIKELY running this in the wrong directory!");
+			System.out.println("In IntelliJ, fix it by clicking \"FileServer\" > Edit Configurations at the top of your screen");
+			System.out.println("Then changing the \"Working Directory\" to be in \"2006Scape/2006Scape file_server\", instead of just \"2006Scape\"");
+			System.out.println("************************************");
+			System.out.println("************************************");
+			System.out.println("************************************");
+			System.exit(1);
+		}
+
+		logger.info("Starting workers...");
+		pool.start();
+		
+		logger.info("Starting services...");
+		try {
+			start("HTTP", new HttpPipelineFactory(handler, timer), NetworkConstants.HTTP_PORT);
+		} catch (Throwable t) {
+			logger.log(Level.SEVERE, "Failed to start HTTP service.", t);
+			logger.warning("HTTP will be unavailable. JAGGRAB will be used as a fallback by clients but this isn't reccomended!");
+		}
+		start("JAGGRAB", new JagGrabPipelineFactory(handler, timer), NetworkConstants.JAGGRAB_PORT);
+		start("ondemand", new OnDemandPipelineFactory(handler, timer), NetworkConstants.SERVICE_PORT);
+		
+		logger.info("Ready for connections.");
+	}
+
+	/**
+	 * Starts the specified service.
+	 * @param name The name of the service.
+	 * @param pipelineFactory The pipeline factory.
+	 * @param port The port.
+	 */
+	private void start(String name, ChannelPipelineFactory pipelineFactory, int port) {
+		SocketAddress address = new InetSocketAddress(port);
+		
+		logger.info("Binding " + name + " service to " + address + "...");
+		
+		ServerBootstrap bootstrap = new ServerBootstrap();
+		bootstrap.setFactory(new NioServerSocketChannelFactory(service, service));
+		bootstrap.setPipelineFactory(pipelineFactory);
+		bootstrap.bind(address);
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/ChannelRequest.java

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+package org.apollo.jagcached.dispatch;
+
+import org.jboss.netty.channel.Channel;
+
+/**
+ * A specialised request which contains a channel as well as the request object
+ * itself.
+ * @author Graham
+ * @param <T> The type of request.
+ */
+public final class ChannelRequest<T> implements Comparable<ChannelRequest<T>> {
+	
+	/**
+	 * The channel.
+	 */
+	private final Channel channel;
+	
+	/**
+	 * The request.
+	 */
+	private final T request;
+	
+	/**
+	 * Creates a new channel request.
+	 * @param channel The channel.
+	 * @param request The request.
+	 */
+	public ChannelRequest(Channel channel, T request) {
+		this.channel = channel;
+		this.request = request;
+	}
+	
+	/**
+	 * Gets the channel.
+	 * @return The channel.
+	 */
+	public Channel getChannel() {
+		return channel;
+	}
+	
+	/**
+	 * Gets the request.
+	 * @return The request.
+	 */
+	public T getRequest() {
+		return request;
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public int compareTo(ChannelRequest<T> o) {
+		if (request instanceof Comparable<?> && o.request instanceof Comparable<?>) {
+			return ((Comparable<T>) request).compareTo(o.request);
+		}
+		return 0;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/HttpRequestWorker.java

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+package org.apollo.jagcached.dispatch;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
+import java.util.Date;
+
+import org.apollo.jagcached.fs.IndexedFileSystem;
+import org.apollo.jagcached.resource.CombinedResourceProvider;
+import org.apollo.jagcached.resource.HypertextResourceProvider;
+import org.apollo.jagcached.resource.ResourceProvider;
+import org.apollo.jagcached.resource.VirtualResourceProvider;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelFutureListener;
+import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
+import org.jboss.netty.handler.codec.http.HttpRequest;
+import org.jboss.netty.handler.codec.http.HttpResponse;
+import org.jboss.netty.handler.codec.http.HttpResponseStatus;
+
+/**
+ * A worker which services HTTP requests.
+ * @author Graham
+ */
+public final class HttpRequestWorker extends RequestWorker<HttpRequest, ResourceProvider> {
+
+	/**
+	 * The value of the server header.
+	 */
+	private static final String SERVER_IDENTIFIER = "JAGeX/3.1";
+	
+	/**
+	 * The directory with web files.
+	 */
+	private static final File WWW_DIRECTORY = new File("./data/www/");
+
+	/**
+	 * The default character set.
+	 */
+	private static final Charset CHARACTER_SET = Charset.forName("ISO-8859-1");
+
+	/**
+	 * Creates the HTTP request worker.
+	 * @param fs The file system.
+	 */
+	public HttpRequestWorker(IndexedFileSystem fs) {
+		super(new CombinedResourceProvider(new VirtualResourceProvider(fs), new HypertextResourceProvider(WWW_DIRECTORY)));
+	}
+
+	@Override
+	protected ChannelRequest<HttpRequest> nextRequest() throws InterruptedException {
+		return RequestDispatcher.nextHttpRequest();
+	}
+
+	@Override
+	protected void service(ResourceProvider provider, Channel channel, HttpRequest request) throws IOException {
+		String path = request.getUri();
+		ByteBuffer buf = provider.get(path);
+		
+		ChannelBuffer wrappedBuf;
+		HttpResponseStatus status = HttpResponseStatus.OK;
+		
+		String mimeType = getMimeType(request.getUri());
+		
+		if (buf == null) {
+			status = HttpResponseStatus.NOT_FOUND;
+			wrappedBuf = createErrorPage(status, "The page you requested could not be found.");
+			mimeType = "text/html";
+		} else {
+			wrappedBuf = ChannelBuffers.wrappedBuffer(buf);
+		}
+		
+		HttpResponse resp = new DefaultHttpResponse(request.getProtocolVersion(), status);
+		
+		resp.setHeader("Date", new Date());
+		resp.setHeader("Server", SERVER_IDENTIFIER);
+		resp.setHeader("Content-type", mimeType + ", charset=" + CHARACTER_SET.name());
+		resp.setHeader("Cache-control", "no-cache");
+		resp.setHeader("Pragma", "no-cache");
+		resp.setHeader("Expires", new Date(0));
+		resp.setHeader("Connection", "close");
+		resp.setHeader("Content-length", wrappedBuf.readableBytes());
+		resp.setChunked(false);
+		resp.setContent(wrappedBuf);
+		
+		channel.write(resp).addListener(ChannelFutureListener.CLOSE);
+	}
+
+	/**
+	 * Gets the MIME type of a file by its name.
+	 * @param name The file name.
+	 * @return The MIME type.
+	 */
+	private String getMimeType(String name) {
+		if (name.endsWith(".htm") || name.endsWith(".html")) {
+			return "text/html";
+		} else if (name.endsWith(".css")) {
+			return "text/css";
+		} else if (name.endsWith(".js")) {
+			return "text/javascript";
+		} else if (name.endsWith(".jpg") || name.endsWith(".jpeg")) {
+			return "image/jpeg";
+		} else if (name.endsWith(".gif")) {
+			return "image/gif";
+		} else if (name.endsWith(".png")) {
+			return "image/png";
+		} else if (name.endsWith(".txt")) {
+			return "text/plain";
+		}
+		return "application/octect-stream";
+	}
+
+	/**
+	 * Creates an error page.
+	 * @param status The HTTP status.
+	 * @param description The error description.
+	 * @return The error page as a buffer.
+	 */
+	private ChannelBuffer createErrorPage(HttpResponseStatus status, String description) {
+		String title = status.getCode() + " " + status.getReasonPhrase();
+		
+		StringBuilder bldr = new StringBuilder();
+		
+		bldr.append("<!DOCTYPE html><html><head><title>");
+		bldr.append(title);
+		bldr.append("</title></head><body><h1>");
+		bldr.append(title);
+		bldr.append("</h1><p>");
+		bldr.append(description);
+		bldr.append("</p><hr /><address>");
+		bldr.append(SERVER_IDENTIFIER);
+		bldr.append(" Server</address></body></html>");
+		
+		return ChannelBuffers.copiedBuffer(bldr.toString(), Charset.defaultCharset());
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/JagGrabRequestWorker.java

@@ -0,0 +1,46 @@
+package org.apollo.jagcached.dispatch;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import org.apollo.jagcached.fs.IndexedFileSystem;
+import org.apollo.jagcached.net.jaggrab.JagGrabRequest;
+import org.apollo.jagcached.net.jaggrab.JagGrabResponse;
+import org.apollo.jagcached.resource.ResourceProvider;
+import org.apollo.jagcached.resource.VirtualResourceProvider;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelFutureListener;
+
+/**
+ * A worker which services JAGGRAB requests.
+ * @author Graham
+ */
+public final class JagGrabRequestWorker extends RequestWorker<JagGrabRequest, ResourceProvider> {
+
+	/**
+	 * Creates the JAGGRAB request worker.
+	 * @param fs The file system.
+	 */
+	public JagGrabRequestWorker(IndexedFileSystem fs) {
+		super(new VirtualResourceProvider(fs));
+	}
+
+	@Override
+	protected ChannelRequest<JagGrabRequest> nextRequest() throws InterruptedException {
+		return RequestDispatcher.nextJagGrabRequest();
+	}
+
+	@Override
+	protected void service(ResourceProvider provider, Channel channel, JagGrabRequest request) throws IOException {
+		ByteBuffer buf = provider.get(request.getFilePath());
+		if (buf == null) {
+			channel.close();
+		} else {
+			ChannelBuffer wrapped = ChannelBuffers.wrappedBuffer(buf);
+			channel.write(new JagGrabResponse(wrapped)).addListener(ChannelFutureListener.CLOSE);
+		}
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/OnDemandRequestWorker.java

@@ -0,0 +1,61 @@
+package org.apollo.jagcached.dispatch;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+
+import org.apollo.jagcached.fs.FileDescriptor;
+import org.apollo.jagcached.fs.IndexedFileSystem;
+import org.apollo.jagcached.net.ondemand.OnDemandRequest;
+import org.apollo.jagcached.net.ondemand.OnDemandResponse;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+
+/**
+ * A worker which services 'on-demand' requests.
+ * @author Graham
+ */
+public final class OnDemandRequestWorker extends RequestWorker<OnDemandRequest, IndexedFileSystem> {
+	
+	/**
+	 * The maximum length of a chunk, in bytes.
+	 */
+	private static final int CHUNK_LENGTH = 500;
+
+	/**
+	 * Creates the 'on-demand' request worker.
+	 * @param fs The file system.
+	 */
+	public OnDemandRequestWorker(IndexedFileSystem fs) {
+		super(fs);
+	}
+
+	@Override
+	protected ChannelRequest<OnDemandRequest> nextRequest() throws InterruptedException {
+		return RequestDispatcher.nextOnDemandRequest();
+	}
+
+	@Override
+	protected void service(IndexedFileSystem fs, Channel channel, OnDemandRequest request) throws IOException {
+		FileDescriptor desc = request.getFileDescriptor();
+				
+		ByteBuffer buf = fs.getFile(desc);
+		int length = buf.remaining();
+		
+		for (int chunk = 0; buf.remaining() > 0; chunk++) {
+			int chunkSize = buf.remaining();
+			if (chunkSize > CHUNK_LENGTH) {
+				chunkSize = CHUNK_LENGTH;
+			}
+			
+			byte[] tmp = new byte[chunkSize];
+			buf.get(tmp, 0, tmp.length);
+			ChannelBuffer chunkData = ChannelBuffers.wrappedBuffer(tmp, 0, chunkSize);
+			
+			OnDemandResponse response = new OnDemandResponse(desc, length, chunk, chunkData);
+			channel.write(response);
+		}
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/RequestDispatcher.java

@@ -0,0 +1,112 @@
+package org.apollo.jagcached.dispatch;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.PriorityBlockingQueue;
+
+
+import org.apollo.jagcached.net.jaggrab.JagGrabRequest;
+import org.apollo.jagcached.net.ondemand.OnDemandRequest;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.handler.codec.http.HttpRequest;
+
+/**
+ * A class which dispatches requests to worker threads.
+ * @author Graham
+ */
+public final class RequestDispatcher {
+	
+	/**
+	 * The maximum size of a queue before requests are rejected.
+	 */
+	private static final int MAXIMUM_QUEUE_SIZE = 1024;
+	
+	/**
+	 * A queue for pending 'on-demand' requests.
+	 */
+	private static final BlockingQueue<ChannelRequest<OnDemandRequest>> onDemandQueue = new PriorityBlockingQueue<ChannelRequest<OnDemandRequest>>();
+
+	/**
+	 * A queue for pending JAGGRAB requests.
+	 */
+	private static final BlockingQueue<ChannelRequest<JagGrabRequest>> jagGrabQueue = new LinkedBlockingQueue<ChannelRequest<JagGrabRequest>>();
+	
+	/**
+	 * A queue for pending HTTP requests.
+	 */
+	private static final BlockingQueue<ChannelRequest<HttpRequest>> httpQueue = new LinkedBlockingQueue<ChannelRequest<HttpRequest>>();
+	
+	/**
+	 * Gets the next 'on-demand' request from the queue, blocking if none are
+	 * available.
+	 * @return The 'on-demand' request.
+	 * @throws InterruptedException if the thread is interrupted.
+	 */
+	static ChannelRequest<OnDemandRequest> nextOnDemandRequest() throws InterruptedException {
+		return onDemandQueue.take();
+	}
+	
+	/**
+	 * Gets the next JAGGRAB request from the queue, blocking if none are
+	 * available.
+	 * @return The JAGGRAB request.
+	 * @throws InterruptedException if the thread is interrupted.
+	 */
+	static ChannelRequest<JagGrabRequest> nextJagGrabRequest() throws InterruptedException {
+		return jagGrabQueue.take();
+	}
+	
+	/**
+	 * Gets the next HTTP request from the queue, blocking if none are
+	 * available.
+	 * @return The HTTP request.
+	 * @throws InterruptedException if the thread is interrupted.
+	 */
+	static ChannelRequest<HttpRequest> nextHttpRequest() throws InterruptedException {
+		return httpQueue.take();
+	}
+	
+	/**
+	 * Dispatches an 'on-demand' request.
+	 * @param channel The channel.
+	 * @param request The request.
+	 */
+	public static void dispatch(Channel channel, OnDemandRequest request) {
+		if (onDemandQueue.size() >= MAXIMUM_QUEUE_SIZE) {
+			channel.close();
+		}
+		onDemandQueue.add(new ChannelRequest<OnDemandRequest>(channel, request));
+	}
+
+	/**
+	 * Dispatches a JAGGRAB request.
+	 * @param channel The channel.
+	 * @param request The request.
+	 */
+	public static void dispatch(Channel channel, JagGrabRequest request) {
+		if (jagGrabQueue.size() >= MAXIMUM_QUEUE_SIZE) {
+			channel.close();
+		}
+		jagGrabQueue.add(new ChannelRequest<JagGrabRequest>(channel, request));
+	}
+
+	/**
+	 * Dispatches a HTTP request.
+	 * @param channel The channel.
+	 * @param request The request.
+	 */
+	public static void dispatch(Channel channel, HttpRequest request) {
+		if (httpQueue.size() >= MAXIMUM_QUEUE_SIZE) {
+			channel.close();
+		}
+		httpQueue.add(new ChannelRequest<HttpRequest>(channel, request));
+	}
+	
+	/**
+	 * Default private constructor to prevent instantiation.
+	 */
+	private RequestDispatcher() {
+		
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/RequestWorker.java

@@ -0,0 +1,90 @@
+package org.apollo.jagcached.dispatch;
+
+import java.io.IOException;
+
+import org.jboss.netty.channel.Channel;
+
+/**
+ * The base class for request workers.
+ * @author Graham
+ * @param <T> The type of request.
+ * @param <P> The type of provider.
+ */
+public abstract class RequestWorker<T, P> implements Runnable {
+	
+	/**
+	 * The resource provider.
+	 */
+	private final P provider;
+	
+	/**
+	 * An object used for locking checks to see if the worker is running.
+	 */
+	private final Object lock = new Object();
+	
+	/**
+	 * A flag indicating if the worker should be running.
+	 */
+	private boolean running = true;
+	
+	/**
+	 * Creates the request worker with the specified file system.
+	 * @param provider The resource provider.
+	 */
+	public RequestWorker(P provider) {
+		this.provider = provider;
+	}
+
+	/**
+	 * Stops this worker. The worker's thread may need to be interrupted.
+	 */
+	public final void stop() {
+		synchronized (lock) {
+			running = false;
+		}
+	}
+		
+	@Override
+	public final void run() {
+		while (true) {
+			synchronized (lock) {
+				if (!running) {
+					break;
+				}
+			}
+			
+			ChannelRequest<T> request;
+			try {
+				request = nextRequest();
+			} catch (InterruptedException e) {
+				continue;
+			}
+			
+			Channel channel = request.getChannel();
+			
+			try {
+				service(provider, channel, request.getRequest());
+			} catch (IOException e) {
+				e.printStackTrace();
+				channel.close();
+			}
+		}
+	}
+
+	/**
+	 * Gets the next request.
+	 * @return The next request.
+	 * @throws InterruptedException if the thread is interrupted.
+	 */
+	protected abstract ChannelRequest<T> nextRequest() throws InterruptedException;
+	
+	/**
+	 * Services a request.
+	 * @param provider The resource provider.
+	 * @param channel The channel.
+	 * @param request The request to service.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	protected abstract void service(P provider, Channel channel, T request) throws IOException;
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/dispatch/RequestWorkerPool.java

@@ -0,0 +1,75 @@
+package org.apollo.jagcached.dispatch;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.apollo.jagcached.Constants;
+import org.apollo.jagcached.fs.IndexedFileSystem;
+
+/**
+ * A class which manages the pool of request workers.
+ * @author Graham
+ * @author Ryley Kimmel <ryley.kimmel@live.com>
+ */
+public final class RequestWorkerPool {
+	
+	/**
+	 * The number of threads per request type.
+	 */
+	private static final int THREADS_PER_REQUEST_TYPE = Runtime.getRuntime().availableProcessors();
+	
+	/**
+	 * The number of request types.
+	 */
+	private static final int REQUEST_TYPES = 3;
+	
+	/**
+	 * The executor service.
+	 */
+	private final ExecutorService service;
+	
+	/**
+	 * A list of request workers.
+	 */
+	private final List<RequestWorker<?, ?>> workers = new ArrayList<RequestWorker<?, ?>>();
+	
+	/**
+	 * The request worker pool.
+	 */
+	public RequestWorkerPool() {
+		int totalThreads = REQUEST_TYPES * THREADS_PER_REQUEST_TYPE;
+		service = Executors.newFixedThreadPool(totalThreads);
+	}
+
+	/**
+	 * Starts the threads in the pool.
+	 * @throws Exception if the file system cannot be created.
+	 */
+	public void start() throws Exception {
+		File base = new File(Constants.FILE_SYSTEM_DIR);
+		for (int i = 0; i < THREADS_PER_REQUEST_TYPE; i++) {
+			workers.add(new JagGrabRequestWorker(new IndexedFileSystem(base, true)));
+			workers.add(new OnDemandRequestWorker(new IndexedFileSystem(base, true)));
+			workers.add(new HttpRequestWorker(new IndexedFileSystem(base, true)));
+		}
+		
+		for (RequestWorker<?, ?> worker : workers) {
+			service.submit(worker);
+		}
+	}
+	
+	/**
+	 * Stops the threads in the pool.
+	 */
+	public void stop() {
+		for (RequestWorker<?, ?> worker : workers) {
+			worker.stop();
+		}
+		
+		service.shutdownNow();
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/fs/FileDescriptor.java

@@ -0,0 +1,45 @@
+package org.apollo.jagcached.fs;
+
+/**
+ * A class which points to a file in the cache.
+ * @author Graham
+ */
+public final class FileDescriptor {
+	
+	/**
+	 * The file type.
+	 */
+	private final int type;
+	
+	/**
+	 * The file id.
+	 */
+	private final int file;
+	
+	/**
+	 * Creates the file descriptor.
+	 * @param type The file type.
+	 * @param file The file id.
+	 */
+	public FileDescriptor(int type, int file) {
+		this.type = type;
+		this.file = file;
+	}
+	
+	/**
+	 * Gets the file type.
+	 * @return The file type.
+	 */
+	public int getType() {
+		return type;
+	}
+	
+	/**
+	 * Gets the file id.
+	 * @return The file id.
+	 */
+	public int getFile() {
+		return file;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/fs/FileSystemConstants.java

@@ -0,0 +1,46 @@
+package org.apollo.jagcached.fs;
+
+/**
+ * Holds file system related constants.
+ * @author Graham
+ */
+public final class FileSystemConstants {
+	
+	/**
+	 * The number of caches.
+	 */
+	public static final int CACHE_COUNT = 5;
+	
+	/**
+	 * The number of archives in cache 0.
+	 */
+	public static final int ARCHIVE_COUNT = 9;
+	
+	/**
+	 * The size of an index.
+	 */
+	public static final int INDEX_SIZE = 6;
+	
+	/**
+	 * The size of a header.
+	 */
+	public static final int HEADER_SIZE = 8;
+	
+	/**
+	 * The size of a chunk.
+	 */
+	public static final int CHUNK_SIZE = 512;
+	
+	/**
+	 * The size of a block.
+	 */
+	public static final int BLOCK_SIZE = HEADER_SIZE + CHUNK_SIZE;
+
+	/**
+	 * Default private constructor to prevent instantiation.
+	 */
+	private FileSystemConstants() {
+		
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/fs/Index.java

@@ -0,0 +1,62 @@
+package org.apollo.jagcached.fs;
+
+/**
+ * An {@link Index} points to a file in the {@code main_file_cache.dat} file.
+ * @author Graham
+ */
+public final class Index {
+
+	/**
+	 * Decodes a buffer into an index.
+	 * @param buffer The buffer.
+	 * @return The decoded {@link Index}.
+	 * @throws IllegalArgumentException if the buffer length is invalid.
+	 */
+	public static Index decode(byte[] buffer) {
+		if (buffer.length != FileSystemConstants.INDEX_SIZE) {
+			throw new IllegalArgumentException("Incorrect buffer length.");
+		}
+		
+		int size = ((buffer[0] & 0xFF) << 16) | ((buffer[1] & 0xFF) << 8) | (buffer[2] & 0xFF);
+		int block = ((buffer[3] & 0xFF) << 16) | ((buffer[4] & 0xFF) << 8) | (buffer[5] & 0xFF);
+		
+		return new Index(size, block);
+	}
+	
+	/**
+	 * The size of the file.
+	 */
+	private final int size;
+	
+	/**
+	 * The first block of the file.
+	 */
+	private final int block;
+	
+	/**
+	 * Creates the index.
+	 * @param size The size of the file.
+	 * @param block The first block of the file.
+	 */
+	public Index(int size, int block) {
+		this.size = size;
+		this.block = block;
+	}
+	
+	/**
+	 * Gets the size of the file.
+	 * @return The size of the file.
+	 */
+	public int getSize() {
+		return size;
+	}
+	
+	/**
+	 * Gets the first block of the file.
+	 * @return The first block of the file.
+	 */
+	public int getBlock() {
+		return block;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/fs/IndexedFileSystem.java

@@ -0,0 +1,289 @@
+package org.apollo.jagcached.fs;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.util.zip.CRC32;
+
+/**
+ * A file system based on top of the operating system's file system. It
+ * consists of a data file and index files. Index files point to blocks in the
+ * data file, which contains the actual data.
+ * @author Graham
+ * @author Ryley Kimmel <ryley.kimmel@live.com>
+ */
+public final class IndexedFileSystem implements Closeable {
+	
+	/**
+	 * Read only flag.
+	 */
+	private final boolean readOnly;
+	
+	/**
+	 * The index files.
+	 */
+	private RandomAccessFile[] indices = new RandomAccessFile[256];
+	
+	/**
+	 * The data file.
+	 */
+	private RandomAccessFile data;
+	
+	/**
+	 * The cached CRC table.
+	 */
+	private ByteBuffer crcTable;
+
+	/**
+	 * Creates the file system with the specified base directory.
+	 * @param base The base directory.
+	 * @param readOnly A flag indicating if the file system will be read only.
+	 * @throws Exception if the file system is invalid.
+	 */
+	public IndexedFileSystem(File base, boolean readOnly) throws Exception {
+		this.readOnly = readOnly;
+		detectLayout(base);
+	}
+	
+	/**
+	 * Checks if this {@link IndexedFileSystem} is read only.
+	 * @return {@code true} if so, {@code false} if not.
+	 */
+	public boolean isReadOnly() {
+		return readOnly;
+	}
+	
+	/**
+	 * Automatically detect the layout of the specified directory.
+	 * @param base The base directory.
+	 * @throws Exception if the file system is invalid.
+	 */
+	private void detectLayout(File base) throws Exception {
+		int indexCount = 0;
+		for (int index = 0; index < indices.length; index++) {
+			File f = new File(base.getAbsolutePath() + "/main_file_cache.idx" + index);
+			if (f.exists() && !f.isDirectory()) {
+				indexCount++;
+				indices[index] = new RandomAccessFile(f, readOnly ? "r" : "rw");
+			}
+		}
+		if (indexCount <= 0) {
+			throw new Exception("No index file(s) present");
+		}
+		
+		File dataFile = new File(base.getAbsolutePath() + "/main_file_cache.dat");
+		if (dataFile.exists() && !dataFile.isDirectory()) {
+			data = new RandomAccessFile(dataFile, readOnly ? "r" : "rw");
+		} else {
+			throw new Exception("No data file present");
+		}
+	}
+	
+	/**
+	 * Gets the index of a file.
+	 * @param fd The {@link FileDescriptor} which points to the file.
+	 * @return The {@link Index}.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	private Index getIndex(FileDescriptor fd) throws IOException {
+		int index = fd.getType();
+		if (index < 0 || index >= indices.length) {
+			throw new IndexOutOfBoundsException();
+		}
+		
+		byte[] buffer = new byte[FileSystemConstants.INDEX_SIZE];
+		RandomAccessFile indexFile = indices[index];
+		synchronized (indexFile) {
+			long ptr = (long) fd.getFile() * (long) FileSystemConstants.INDEX_SIZE;
+			if (ptr >= 0 && indexFile.length() >= (ptr + FileSystemConstants.INDEX_SIZE)) {
+				indexFile.seek(ptr);
+				indexFile.readFully(buffer);
+			} else {
+				throw new FileNotFoundException();
+			}
+		}
+				
+		return Index.decode(buffer);
+	}
+	
+	/**
+	 * Gets the number of files with the specified type.
+	 * @param type The type.
+	 * @return The number of files.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	private int getFileCount(int type) throws IOException {
+		if (type < 0 || type >= indices.length) {
+			throw new IndexOutOfBoundsException();
+		}
+		
+		RandomAccessFile indexFile = indices[type];
+		synchronized (indexFile) {
+			return (int) (indexFile.length() / FileSystemConstants.INDEX_SIZE);
+		}
+	}
+	
+	/**
+	 * Gets the CRC table.
+	 * @return The CRC table.
+	 * @throws IOException if an I/O erorr occurs.
+	 */
+	public ByteBuffer getCrcTable() throws IOException {
+		if (readOnly) {
+			synchronized (this) {
+				if (crcTable != null) {
+					return crcTable.slice();
+				}
+			}
+			
+			// the number of archives
+			int archives = getFileCount(0);
+			
+			// the hash
+			int hash = 1234;
+			
+			// the CRCs
+			int[] crcs = new int[archives];
+			
+			// calculate the CRCs
+			CRC32 crc32 = new CRC32();						
+			for (int i = 1; i < crcs.length; i++) {
+				crc32.reset();
+				
+				ByteBuffer bb = getFile(0, i);
+				byte[] bytes = new byte[bb.remaining()];
+				bb.get(bytes, 0, bytes.length);
+				crc32.update(bytes, 0, bytes.length);
+				
+				crcs[i] = (int) crc32.getValue();
+			}
+			
+			// hash the CRCs and place them in the buffer
+			ByteBuffer buf = ByteBuffer.allocate(crcs.length * 4 + 4);
+			for (int i = 0; i < crcs.length; i++) {
+				hash = (hash << 1) + crcs[i];
+				buf.putInt(crcs[i]);
+			}
+			
+			// place the hash into the buffer
+			buf.putInt(hash);
+			buf.flip();
+			
+			synchronized (this) {
+				crcTable = buf;
+				return crcTable.slice();
+			}
+		} else {
+			throw new IOException("cannot get CRC table from a writable file system");
+		}
+	}
+	
+	/**
+	 * Gets a file.
+	 * @param type The file type.
+	 * @param file The file id.
+	 * @return A {@link ByteBuffer} which contains the contents of the file.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	public ByteBuffer getFile(int type, int file) throws IOException {
+		return getFile(new FileDescriptor(type, file));
+	}
+	
+	/**
+	 * Gets a file.
+	 * @param fd The {@link FileDescriptor} which points to the file.
+	 * @return A {@link ByteBuffer} which contains the contents of the file.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	public ByteBuffer getFile(FileDescriptor fd) throws IOException {
+		Index index = getIndex(fd);
+		ByteBuffer buffer = ByteBuffer.allocate(index.getSize());
+		
+		// calculate some initial values
+		long ptr = (long) index.getBlock() * (long) FileSystemConstants.BLOCK_SIZE;
+		int read = 0;
+		int size = index.getSize();
+		int blocks = size / FileSystemConstants.CHUNK_SIZE;
+		if (size % FileSystemConstants.CHUNK_SIZE != 0) {
+			blocks++;
+		}
+		
+		for (int i = 0; i < blocks; i++) {
+			
+			// read header
+			byte[] header = new byte[FileSystemConstants.HEADER_SIZE];
+			synchronized (data) {
+				data.seek(ptr);
+				data.readFully(header);
+			}
+			
+			// increment pointers
+			ptr += FileSystemConstants.HEADER_SIZE;
+			
+			// parse header
+			int nextFile = ((header[0] & 0xFF) << 8) | (header[1] & 0xFF);
+			int curChunk = ((header[2] & 0xFF) << 8) | (header[3] & 0xFF);
+			int nextBlock = ((header[4] & 0xFF) << 16) | ((header[5] & 0xFF) << 8) | (header[6] & 0xFF);
+			int nextType = header[7] & 0xFF;
+			
+			// check expected chunk id is correct
+			if (i != curChunk) {
+				throw new IOException("Chunk id mismatch.");
+			}
+			
+			// calculate how much we can read
+			int chunkSize = size - read;
+			if (chunkSize > FileSystemConstants.CHUNK_SIZE) {
+				chunkSize = FileSystemConstants.CHUNK_SIZE;
+			}
+			
+			// read the next chunk and put it in the buffer
+			byte[] chunk = new byte[chunkSize];
+			synchronized (data) {
+				data.seek(ptr);
+				data.readFully(chunk);
+			}			
+			buffer.put(chunk);
+			
+			// increment pointers
+			read += chunkSize;
+			ptr = (long) nextBlock * (long) FileSystemConstants.BLOCK_SIZE;
+			
+			// if we still have more data to read, check the validity of the
+			// header
+			if (size > read) {				
+				if (nextType != (fd.getType() + 1)) {
+					throw new IOException("File type mismatch.");
+				}
+				
+				if (nextFile != fd.getFile()) {
+					throw new IOException("File id mismatch.");
+				}
+			}
+		}
+		
+		buffer.flip();
+		return buffer;
+	}
+
+	@Override
+	public void close() throws IOException {
+		if (data != null) {
+			synchronized (data) {
+				data.close();
+			}
+		}
+		
+		for (RandomAccessFile index : indices) {
+			if (index != null) {
+				synchronized (index) {
+					index.close();
+				}
+			}
+		}
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/FileServerHandler.java

@@ -0,0 +1,63 @@
+package org.apollo.jagcached.net;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+
+import org.apollo.jagcached.FileServer;
+import org.apollo.jagcached.dispatch.RequestDispatcher;
+import org.apollo.jagcached.net.jaggrab.JagGrabRequest;
+import org.apollo.jagcached.net.ondemand.OnDemandRequest;
+import org.apollo.jagcached.net.service.ServiceRequest;
+import org.apollo.jagcached.net.service.ServiceResponse;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.channel.ExceptionEvent;
+import org.jboss.netty.channel.MessageEvent;
+import org.jboss.netty.handler.codec.http.HttpRequest;
+import org.jboss.netty.handler.timeout.IdleStateAwareChannelUpstreamHandler;
+import org.jboss.netty.handler.timeout.IdleStateEvent;
+
+/**
+ * An {@link IdleStateAwareChannelUpstreamHandler} for the {@link FileServer}.
+ * @author Graham
+ */
+public final class FileServerHandler extends IdleStateAwareChannelUpstreamHandler {
+	
+	/**
+	 * The logger for this class.
+	 */
+	private static final Logger logger = Logger.getLogger(FileServerHandler.class.getName());
+	
+	@Override
+	public void channelIdle(ChannelHandlerContext ctx, IdleStateEvent e) throws Exception {
+		e.getChannel().close();
+	}
+	
+	@Override
+	public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
+		Object msg = e.getMessage();		
+		if (msg instanceof ServiceRequest) {
+			ServiceRequest request = (ServiceRequest) msg;
+			if (request.getId() != ServiceRequest.SERVICE_ONDEMAND) {
+				e.getChannel().close();
+			} else {
+				e.getChannel().write(new ServiceResponse());
+			}
+		} else if (msg instanceof OnDemandRequest) {
+			RequestDispatcher.dispatch(e.getChannel(), (OnDemandRequest) msg);
+		} else if (msg instanceof JagGrabRequest) {
+			RequestDispatcher.dispatch(e.getChannel(), (JagGrabRequest) msg);
+		} else if (msg instanceof HttpRequest) {
+			RequestDispatcher.dispatch(e.getChannel(), (HttpRequest) msg);
+		} else {
+			throw new Exception("unknown message type");
+		}
+	}
+	
+	@Override
+	public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception {
+		logger.log(Level.SEVERE, "Exception occured, closing channel...", e.getCause());
+		e.getChannel().close();
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/HttpPipelineFactory.java

@@ -0,0 +1,61 @@
+package org.apollo.jagcached.net;
+
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.channel.ChannelPipelineFactory;
+import org.jboss.netty.channel.Channels;
+import org.jboss.netty.handler.codec.http.HttpChunkAggregator;
+import org.jboss.netty.handler.codec.http.HttpRequestDecoder;
+import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
+import org.jboss.netty.handler.timeout.IdleStateHandler;
+import org.jboss.netty.util.Timer;
+
+/**
+ * A {@link ChannelPipelineFactory} for the HTTP protocol.
+ * @author Graham
+ */
+public final class HttpPipelineFactory implements ChannelPipelineFactory {
+
+	/**
+	 * The maximum length of a request, in bytes.
+	 */
+	private static final int MAX_REQUEST_LENGTH = 8192;
+	
+	/**
+	 * The file server event handler.
+	 */
+	private final FileServerHandler handler;
+	
+	/**
+	 * The timer used for idle checking.
+	 */
+	private final Timer timer;
+	
+	/**
+	 * Creates the HTTP pipeline factory.
+	 * @param handler The file server event handler.
+	 * @param timer The timer used for idle checking.
+	 */
+	public HttpPipelineFactory(FileServerHandler handler, Timer timer) {
+		this.handler = handler;
+		this.timer = timer;
+	}
+	
+	@Override
+	public ChannelPipeline getPipeline() throws Exception {
+		ChannelPipeline pipeline = Channels.pipeline();
+		
+		// decoders
+		pipeline.addLast("decoder", new HttpRequestDecoder());
+		pipeline.addLast("chunker", new HttpChunkAggregator(MAX_REQUEST_LENGTH));
+		
+		// encoders
+		pipeline.addLast("encoder", new HttpResponseEncoder());
+		
+		// handler
+		pipeline.addLast("timeout", new IdleStateHandler(timer, NetworkConstants.IDLE_TIME, 0, 0));
+		pipeline.addLast("handler", handler);
+		
+		return pipeline;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/JagGrabPipelineFactory.java

@@ -0,0 +1,86 @@
+package org.apollo.jagcached.net;
+
+import java.nio.charset.Charset;
+
+
+import org.apollo.jagcached.net.jaggrab.JagGrabRequestDecoder;
+import org.apollo.jagcached.net.jaggrab.JagGrabResponseEncoder;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.channel.ChannelPipelineFactory;
+import org.jboss.netty.channel.Channels;
+import org.jboss.netty.handler.codec.frame.DelimiterBasedFrameDecoder;
+import org.jboss.netty.handler.codec.string.StringDecoder;
+import org.jboss.netty.handler.timeout.IdleStateHandler;
+import org.jboss.netty.util.Timer;
+
+/**
+ * A {@link ChannelPipelineFactory} for the JAGGRAB protocol.
+ * @author Graham
+ */
+public final class JagGrabPipelineFactory implements ChannelPipelineFactory {
+
+	/**
+	 * The maximum length of a request, in bytes.
+	 */
+	private static final int MAX_REQUEST_LENGTH = 8192;
+	
+	/**
+	 * The character set used in the request.
+	 */
+	private static final Charset JAGGRAB_CHARSET = Charset.forName("US-ASCII");
+	
+	/**
+	 * A buffer with two line feed (LF) characters in it.
+	 */
+	private static final ChannelBuffer DOUBLE_LINE_FEED_DELIMITER = ChannelBuffers.buffer(2);
+	
+	/**
+	 * Populates the double line feed buffer.
+	 */
+	static {
+		DOUBLE_LINE_FEED_DELIMITER.writeByte(10);
+		DOUBLE_LINE_FEED_DELIMITER.writeByte(10);
+	}
+	
+	/**
+	 * The file server event handler.
+	 */
+	private final FileServerHandler handler;
+	
+	/**
+	 * The timer used for idle checking.
+	 */
+	private final Timer timer;
+	
+	/**
+	 * Creates a {@code JAGGRAB} pipeline factory.
+	 * @param handler The file server event handler.
+	 * @param timer The timer used for idle checking.
+	 */
+	public JagGrabPipelineFactory(FileServerHandler handler, Timer timer) {
+		this.handler = handler;
+		this.timer = timer;
+	}
+	
+	@Override
+	public ChannelPipeline getPipeline() throws Exception {
+		ChannelPipeline pipeline = Channels.pipeline();
+		
+		// decoders
+		pipeline.addLast("framer", new DelimiterBasedFrameDecoder(MAX_REQUEST_LENGTH, DOUBLE_LINE_FEED_DELIMITER));
+		pipeline.addLast("string-decoder", new StringDecoder(JAGGRAB_CHARSET));
+		pipeline.addLast("jaggrab-decoder", new JagGrabRequestDecoder());
+		
+		// encoders
+		pipeline.addLast("jaggrab-encoder", new JagGrabResponseEncoder());
+		
+		// handler
+		pipeline.addLast("timeout", new IdleStateHandler(timer, NetworkConstants.IDLE_TIME, 0, 0));
+		pipeline.addLast("handler", handler);
+		
+		return pipeline;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/NetworkConstants.java

@@ -0,0 +1,37 @@
+package org.apollo.jagcached.net;
+
+/**
+ * A class which holds network-related constants.
+ * @author Graham
+ */
+public final class NetworkConstants {
+	
+	/**
+	 * The HTTP port.
+	 */
+	public static final int HTTP_PORT = 8080;
+	
+	/**
+	 * The JAGGRAB port.
+	 */
+	public static final int JAGGRAB_PORT = 43595;
+	
+	/**
+	 * The service port (which is also used for the 'on-demand' protocol).
+	 */
+	public static final int SERVICE_PORT = 43596;
+
+	/**
+	 * The number of seconds a channel can be idle before being closed
+	 * automatically.
+	 */
+	public static final int IDLE_TIME = 15;
+	
+	/**
+	 * Default private constructor to prevent instantiaton.
+	 */
+	private NetworkConstants() {
+		
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/OnDemandPipelineFactory.java

@@ -0,0 +1,59 @@
+package org.apollo.jagcached.net;
+
+
+import org.apollo.jagcached.net.ondemand.OnDemandRequestDecoder;
+import org.apollo.jagcached.net.ondemand.OnDemandResponseEncoder;
+import org.apollo.jagcached.net.service.ServiceRequestDecoder;
+import org.apollo.jagcached.net.service.ServiceResponseEncoder;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.channel.ChannelPipelineFactory;
+import org.jboss.netty.channel.Channels;
+import org.jboss.netty.handler.timeout.IdleStateHandler;
+import org.jboss.netty.util.Timer;
+
+/**
+ * A {@link ChannelPipelineFactory} for the 'on-demand' protocol.
+ * @author Graham
+ */
+public final class OnDemandPipelineFactory implements ChannelPipelineFactory {
+
+	/**
+	 * The file server event handler.
+	 */
+	private final FileServerHandler handler;
+	
+	/**
+	 * The timer used for idle checking.
+	 */
+	private final Timer timer;
+	
+	/**
+	 * Creates an 'on-demand' pipeline factory.
+	 * @param handler The file server event handler.
+	 * @param timer The timer used for idle checking.
+	 */
+	public OnDemandPipelineFactory(FileServerHandler handler, Timer timer) {
+		this.handler = handler;
+		this.timer = timer;
+	}
+	
+	@Override
+	public ChannelPipeline getPipeline() throws Exception {
+		ChannelPipeline pipeline = Channels.pipeline();
+		
+		// decoders
+		pipeline.addLast("serviceDecoder", new ServiceRequestDecoder());
+		pipeline.addLast("decoder", new OnDemandRequestDecoder());
+		
+		// encoders
+		pipeline.addLast("serviceEncoder", new ServiceResponseEncoder());
+		pipeline.addLast("encoder", new OnDemandResponseEncoder());
+		
+		// handler
+		pipeline.addLast("timeout", new IdleStateHandler(timer, NetworkConstants.IDLE_TIME, 0, 0));
+		pipeline.addLast("handler", handler);
+		
+		return pipeline;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/jaggrab/JagGrabRequest.java

@@ -0,0 +1,30 @@
+package org.apollo.jagcached.net.jaggrab;
+
+/**
+ * Represents the request for a single file using the JAGGRAB protocol.
+ * @author Graham
+ */
+public final class JagGrabRequest {
+	
+	/**
+	 * The path to the file.
+	 */
+	private final String filePath;
+
+	/**
+	 * Creates the request.
+	 * @param filePath The file path.
+	 */
+	public JagGrabRequest(String filePath) {
+		this.filePath = filePath;
+	}
+	
+	/**
+	 * Gets the file path.
+	 * @return The file path.
+	 */
+	public String getFilePath() {
+		return filePath;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/jaggrab/JagGrabRequestDecoder.java

@@ -0,0 +1,27 @@
+package org.apollo.jagcached.net.jaggrab;
+
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+
+/**
+ * A {@link OneToOneDecoder} for the JAGGRAB protocol.
+ * @author Graham
+ */
+public final class JagGrabRequestDecoder extends OneToOneDecoder {
+
+	@Override
+	protected Object decode(ChannelHandlerContext ctx, Channel c, Object msg) throws Exception {
+		if (msg instanceof String) {
+			String str = ((String) msg);
+			if (str.startsWith("JAGGRAB /")) {
+				String filePath = str.substring(8).trim();
+				return new JagGrabRequest(filePath);
+			} else {
+				throw new Exception("corrupted request line");
+			}
+		}
+		return msg;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/jaggrab/JagGrabResponse.java

@@ -0,0 +1,32 @@
+package org.apollo.jagcached.net.jaggrab;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+
+/**
+ * Represents a single JAGGRAB reponse.
+ * @author Graham
+ */
+public final class JagGrabResponse {
+
+	/**
+	 * The file data.
+	 */
+	private final ChannelBuffer fileData;
+	
+	/**
+	 * Creates the response.
+	 * @param fileData The file data.
+	 */
+	public JagGrabResponse(ChannelBuffer fileData) {
+		this.fileData = fileData;
+	}
+	
+	/**
+	 * Gets the file data.
+	 * @return The file data.
+	 */
+	public ChannelBuffer getFileData() {
+		return fileData;
+	}
+	
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/jaggrab/JagGrabResponseEncoder.java

@@ -0,0 +1,22 @@
+package org.apollo.jagcached.net.jaggrab;
+
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
+
+/**
+ * A {@link OneToOneEncoder} for the JAGGRAB protocol.
+ * @author Graham
+ */
+public final class JagGrabResponseEncoder extends OneToOneEncoder {
+
+	@Override
+	protected Object encode(ChannelHandlerContext ctx, Channel c, Object msg) throws Exception {
+		if (msg instanceof JagGrabResponse) {
+			JagGrabResponse resp = (JagGrabResponse) msg;
+			return resp.getFileData();
+		}
+		return msg;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/ondemand/OnDemandRequest.java

@@ -0,0 +1,109 @@
+package org.apollo.jagcached.net.ondemand;
+
+import org.apollo.jagcached.fs.FileDescriptor;
+
+/**
+ * Represents a single 'on-demand' request.
+ * @author Graham
+ * @author Ryley Kimmel <ryley.kimmel@live.com>
+ */
+public final class OnDemandRequest implements Comparable<OnDemandRequest> {
+
+	/**
+	 * An enumeration containing the different request priorities.
+	 * @author Graham
+	 */
+	public enum Priority {
+
+		/**
+		 * High priority - used in-game when data is required immediately but
+		 * has not yet been received.
+		 */
+		HIGH,
+
+		/**
+		 * Medium priority - used while loading the 'bare minimum' required to
+		 * run the game.
+		 */
+		MEDIUM,
+
+		/**
+		 * Low priority - used when a file is not required urgently. The client
+		 * login screen says "loading extra files.." when low priority loading
+		 * is being performed.
+		 */
+		LOW;
+
+		/**
+		 * Converts the integer value to a priority.
+		 * @param v The integer value.
+		 * @return The priority.
+		 * @throws IllegalArgumentException if the value is outside of the
+		 * range 1-3 inclusive.
+		 */
+		public static Priority valueOf(int v) {
+			switch (v) {
+			case 0:
+				return HIGH;
+			case 1:
+				return MEDIUM;
+			case 2:
+				return LOW;
+			default:
+				throw new IllegalArgumentException("priority out of range");
+			}
+		}
+
+	}
+
+	/**
+	 * The file descriptor.
+	 */
+	private final FileDescriptor fileDescriptor;
+
+	/**
+	 * The request priority.
+	 */
+	private final Priority priority;
+
+	/**
+	 * Creates the 'on-demand' request.
+	 * @param fileDescriptor The file descriptor.
+	 * @param priority The priority.
+	 */
+	public OnDemandRequest(FileDescriptor fileDescriptor, Priority priority) {
+		this.fileDescriptor = fileDescriptor;
+		this.priority = priority;
+	}
+
+	/**
+	 * Gets the file descriptor.
+	 * @return The file descriptor.
+	 */
+	public FileDescriptor getFileDescriptor() {
+		return fileDescriptor;
+	}
+
+	/**
+	 * Gets the priority.
+	 * @return The priority.
+	 */
+	public Priority getPriority() {
+		return priority;
+	}
+
+	@Override
+	public int compareTo(OnDemandRequest o) {
+		int thisPriority = priority.ordinal();
+		int otherPriority = o.priority.ordinal();
+
+		if (thisPriority < otherPriority) {
+			return 1;
+		} else if (thisPriority == otherPriority) {
+			return 0;
+		} else {
+			return -1;
+		}
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/ondemand/OnDemandRequestDecoder.java

@@ -0,0 +1,32 @@
+package org.apollo.jagcached.net.ondemand;
+
+
+import org.apollo.jagcached.fs.FileDescriptor;
+import org.apollo.jagcached.net.ondemand.OnDemandRequest.Priority;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+
+/**
+ * A {@link FrameDecoder} for the 'on-demand' protocol.
+ * @author Graham
+ */
+public final class OnDemandRequestDecoder extends FrameDecoder {
+
+	@Override
+	protected Object decode(ChannelHandlerContext ctx, Channel c, ChannelBuffer buf) throws Exception {
+		if (buf.readableBytes() >= 4) {
+			int type = buf.readUnsignedByte() + 1;
+			int file = buf.readUnsignedShort();
+			int priority = buf.readUnsignedByte();
+			
+			FileDescriptor desc = new FileDescriptor(type, file);
+			Priority p = Priority.valueOf(priority);
+			
+			return new OnDemandRequest(desc, p);
+		}
+		return null;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/ondemand/OnDemandResponse.java

@@ -0,0 +1,79 @@
+package org.apollo.jagcached.net.ondemand;
+
+
+import org.apollo.jagcached.fs.FileDescriptor;
+import org.jboss.netty.buffer.ChannelBuffer;
+
+/**
+ * Represents a single 'on-demand' response.
+ * @author Graham
+ */
+public final class OnDemandResponse {
+	
+	/**
+	 * The file descriptor.
+	 */
+	private final FileDescriptor fileDescriptor;
+	
+	/**
+	 * The file size.
+	 */
+	private final int fileSize;
+	
+	/**
+	 * The chunk id.
+	 */
+	private final int chunkId;
+	
+	/**
+	 * The chunk data.
+	 */
+	private final ChannelBuffer chunkData;
+	
+	/**
+	 * Creates the 'on-demand' response.
+	 * @param fileDescriptor The file descriptor.
+	 * @param fileSize The file size.
+	 * @param chunkId The chunk id.
+	 * @param chunkData The chunk data.
+	 */
+	public OnDemandResponse(FileDescriptor fileDescriptor, int fileSize, int chunkId, ChannelBuffer chunkData) {
+		this.fileDescriptor = fileDescriptor;
+		this.fileSize = fileSize;
+		this.chunkId = chunkId;
+		this.chunkData = chunkData;
+	}
+	
+	/**
+	 * Gets the file descriptor.
+	 * @return The file descriptor.
+	 */
+	public FileDescriptor getFileDescriptor() {
+		return fileDescriptor;
+	}
+	
+	/**
+	 * Gets the file size.
+	 * @return The file size.
+	 */
+	public int getFileSize() {
+		return fileSize;
+	}
+	
+	/**
+	 * Gets the chunk id.
+	 * @return The chunk id.
+	 */
+	public int getChunkId() {
+		return chunkId;
+	}
+	
+	/**
+	 * Gets the chunk data.
+	 * @return The chunk data.
+	 */
+	public ChannelBuffer getChunkData() {
+		return chunkData;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/ondemand/OnDemandResponseEncoder.java

@@ -0,0 +1,39 @@
+package org.apollo.jagcached.net.ondemand;
+
+
+import org.apollo.jagcached.fs.FileDescriptor;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
+
+/**
+ * A {@link OneToOneEncoder} for the 'on-demand' protocol.
+ * @author Graham
+ */
+public final class OnDemandResponseEncoder extends OneToOneEncoder {
+
+	@Override
+	protected Object encode(ChannelHandlerContext ctx, Channel c, Object msg) throws Exception {
+		if (msg instanceof OnDemandResponse) {
+			OnDemandResponse resp = (OnDemandResponse) msg;
+			
+			FileDescriptor fileDescriptor = resp.getFileDescriptor();
+			int fileSize = resp.getFileSize();
+			int chunkId = resp.getChunkId();
+			ChannelBuffer chunkData = resp.getChunkData();
+			
+			ChannelBuffer buf = ChannelBuffers.buffer(6 + chunkData.readableBytes());
+			buf.writeByte(fileDescriptor.getType() - 1);
+			buf.writeShort(fileDescriptor.getFile());
+			buf.writeShort(fileSize);
+			buf.writeByte(chunkId);
+			buf.writeBytes(chunkData);
+			
+			return buf;
+		}
+		return msg;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/service/ServiceRequest.java

@@ -0,0 +1,40 @@
+package org.apollo.jagcached.net.service;
+
+/**
+ * Represents a service request message.
+ * @author Graham
+ */
+public final class ServiceRequest {
+	
+	/**
+	 * The game service id.
+	 */
+	public static final int SERVICE_GAME = 14;
+	
+	/**
+	 * The 'on-demand' service id.
+	 */
+	public static final int SERVICE_ONDEMAND = 15;
+	
+	/**
+	 * The service id.
+	 */
+	private final int id;
+
+	/**
+	 * Creates a service request.
+	 * @param id The service id.
+	 */
+	public ServiceRequest(int id) {
+		this.id = id;
+	}
+	
+	/**
+	 * Gets the service id.
+	 * @return The service id.
+	 */
+	public int getId() {
+		return id;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/service/ServiceRequestDecoder.java

@@ -0,0 +1,39 @@
+package org.apollo.jagcached.net.service;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+
+/**
+ * A {@link FrameDecoder} which decodes {@link ServiceRequest} messages.
+ * @author Graham
+ */
+public final class ServiceRequestDecoder extends FrameDecoder {
+	
+	/**
+	 * Creates the decoder, enabling the 'unfold' mechanism.
+	 */
+	public ServiceRequestDecoder() {
+		super(true);
+	}
+
+	@Override
+	protected Object decode(ChannelHandlerContext ctx, Channel c, ChannelBuffer buf) throws Exception {
+		if (buf.readable()) {
+			ServiceRequest request = new ServiceRequest(buf.readUnsignedByte());
+						
+			ChannelPipeline pipeline = ctx.getPipeline();
+			pipeline.remove(this);
+			
+			if (buf.readable()) {
+				return new Object[] { request, buf.readBytes(buf.readableBytes()) };
+			} else {
+				return request;
+			}
+		}
+		return null;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/service/ServiceResponse.java

@@ -0,0 +1,9 @@
+package org.apollo.jagcached.net.service;
+
+/**
+ * Represents a response to a service request.
+ * @author Graham
+ */
+public final class ServiceResponse {
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/net/service/ServiceResponseEncoder.java

@@ -0,0 +1,25 @@
+package org.apollo.jagcached.net.service;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
+
+/**
+ * A {@link OneToOneEncoder} which encodes {@link ServiceResponse} messages.
+ * @author Graham
+ */
+public final class ServiceResponseEncoder extends OneToOneEncoder {
+
+	@Override
+	protected Object encode(ChannelHandlerContext ctx, Channel c, Object msg) throws Exception {
+		if (msg instanceof ServiceResponse) {
+			ChannelBuffer buf = ChannelBuffers.buffer(8);
+			buf.writeLong(0);
+			return buf;
+		}
+		return msg;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/resource/CombinedResourceProvider.java

@@ -0,0 +1,40 @@
+package org.apollo.jagcached.resource;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+/**
+ * A resource provider composed of multiple resource providers.
+ * @author Graham Edgecombe
+ */
+public final class CombinedResourceProvider extends ResourceProvider {
+	
+	/**
+	 * An array of resource providers.
+	 */
+	private final ResourceProvider[] providers;
+	
+	/**
+	 * Creates the combined resource providers.
+	 * @param providers The providers this provider delegates to.
+	 */
+	public CombinedResourceProvider(ResourceProvider... providers) {
+		this.providers = providers;
+	}
+
+	@Override
+	public boolean accept(String path) throws IOException {
+		return true;
+	}
+
+	@Override
+	public ByteBuffer get(String path) throws IOException {
+		for (ResourceProvider provider : providers) {
+			if (provider.accept(path)) {
+				return provider.get(path);
+			}
+		}
+		return null;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/resource/HypertextResourceProvider.java

@@ -0,0 +1,64 @@
+package org.apollo.jagcached.resource;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.net.URI;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel.MapMode;
+
+/**
+ * A {@link ResourceProvider} which provides additional hypertext resources.
+ * @author Graham Edgecombe
+ */
+public final class HypertextResourceProvider extends ResourceProvider {
+	
+	/**
+	 * The base directory from which documents are served.
+	 */
+	private final File base;
+	
+	/**
+	 * Creates a new hypertext resource provider with the specified base
+	 * directory.
+	 * @param base The base directory.
+	 */
+	public HypertextResourceProvider(File base) {
+		this.base = base;
+	}
+
+	@Override
+	public boolean accept(String path) throws IOException {
+		File f = new File(base, path);
+		URI target = f.toURI().normalize();
+		if (target.toASCIIString().startsWith(base.toURI().normalize().toASCIIString())) {
+			if (f.isDirectory()) {
+				f = new File(f, "index.html");
+			}
+			return f.exists();
+		}
+		return false;
+	}
+
+	@Override
+	public ByteBuffer get(String path) throws IOException {
+		File f = new File(base, path);
+		if (f.isDirectory()) {
+			f = new File(f, "index.html");
+		}
+		if (!f.exists()) {
+			return null;
+		}
+		
+		RandomAccessFile raf = new RandomAccessFile(f, "r");
+		ByteBuffer buf;
+		try {
+			buf = raf.getChannel().map(MapMode.READ_ONLY, 0, raf.length());
+		} finally {
+			raf.close();
+		}
+		
+		return buf;
+	}
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/resource/ResourceProvider.java

@@ -0,0 +1,30 @@
+package org.apollo.jagcached.resource;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+/**
+ * A class which provides resources.
+ * @author Graham Edgecombe
+ */
+public abstract class ResourceProvider {
+
+	/**
+	 * Checks that this provider can fulfil a request to the specified
+	 * resource.
+	 * @param path The path to the resource, e.g. {@code /crc}.
+	 * @return {@code true} if the provider can fulfil a request to the
+	 * resource, {@code false} otherwise.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	public abstract boolean accept(String path) throws IOException;
+	
+	/**
+	 * Gets a resource by its path.
+	 * @param path The path.
+	 * @return The resource, or {@code null} if it doesn't exist.
+	 * @throws IOException if an I/O error occurs.
+	 */
+	public abstract ByteBuffer get(String path) throws IOException;
+
+}

2006Scape file_server/src/main/java/org/apollo/jagcached/resource/VirtualResourceProvider.java

@@ -0,0 +1,70 @@
+package org.apollo.jagcached.resource;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import org.apollo.jagcached.fs.IndexedFileSystem;
+
+/**
+ * A {@link ResourceProvider} which maps virtual resources (such as
+ * {@code /media}) to files in an {@link IndexedFileSystem}.
+ * @author Graham Edgecombe
+ */
+public final class VirtualResourceProvider extends ResourceProvider {
+	
+	/**
+	 * An array of valid prefixes.
+	 */
+	private static final String[] VALID_PREFIXES = {
+		"crc", "title", "config", "interface", "media", "versionlist",
+		"textures", "wordenc", "sounds"
+	};
+	
+	/**
+	 * The file system.
+	 */
+	private final IndexedFileSystem fs;
+	
+	/**
+	 * Creates a new virtual resource provider with the specified file system.
+	 * @param fs The file system.
+	 */
+	public VirtualResourceProvider(IndexedFileSystem fs) {
+		this.fs = fs;
+	}
+
+	@Override
+	public boolean accept(String path) throws IOException {
+		for (String prefix : VALID_PREFIXES) {
+			if (path.startsWith("/" + prefix)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+	@Override
+	public ByteBuffer get(String path) throws IOException {
+		if (path.startsWith("/crc")) {
+			return fs.getCrcTable();
+		} else if (path.startsWith("/title")) {
+			return fs.getFile(0, 1);
+		} else if (path.startsWith("/config")) {
+			return fs.getFile(0, 2);
+		} else if (path.startsWith("/interface")) {
+			return fs.getFile(0, 3);
+		} else if (path.startsWith("/media")) {
+			return fs.getFile(0, 4);
+		} else if (path.startsWith("/versionlist")) {
+			return fs.getFile(0, 5);
+		} else if (path.startsWith("/textures")) {
+			return fs.getFile(0, 6);
+		} else if (path.startsWith("/wordenc")) {
+			return fs.getFile(0, 7);
+		} else if (path.startsWith("/sounds")) {
+			return fs.getFile(0, 8);
+		}
+		return null;
+	}
+
+}