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126
WebServer.java
Normal file
126
WebServer.java
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//
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// Multithreaded Java WebServer
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// (C) 2001 Anders Gidenstam
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// (based on a lab in Computer Networking: ..)
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//
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import java.io.*;
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import java.net.*;
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import java.util.*;
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import java.net.InetAddress.*;
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public final class WebServer
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{
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public static void main(String argv[]) throws Exception
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{
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// Set port number
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int port = 0;
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// Establish the listening socket
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ServerSocket serverSocket = new ServerSocket(port);
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System.out.println("Port number is: "+serverSocket.getLocalPort());
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// Wait for and process HTTP service requests
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while (true) {
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// Wait for TCP connection
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Socket requestSocket = serverSocket.accept();
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requestSocket.setSoLinger(true, 5);
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// Create an object to handle the request
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HttpRequest request = new HttpRequest(requestSocket);
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//request.run()
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// Create a new thread for the request
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Thread thread = new Thread(request);
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// Start the thread
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thread.start();
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}
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}
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}
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final class HttpRequest implements Runnable
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{
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// Constants
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// Recognized HTTP methods
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final static class HTTP_METHOD
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{
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final static String GET = "GET";
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final static String HEAD = "HEAD";
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final static String POST = "POST";
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}
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final static String HTTPVERSION = "HTTP/1.0";
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final static String CRLF = "\r\n";
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Socket socket;
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// Constructor
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public HttpRequest(Socket socket) throws Exception
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{
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this.socket = socket;
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}
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// Implements the run() method of the Runnable interface
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public void run()
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{
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try {
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processRequest();
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} catch (Exception e) {
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System.out.println(e);
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}
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}
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// Process a HTTP request
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private void processRequest() throws Exception
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{
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// Get the input and output streams of the socket.
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InputStream ins = socket.getInputStream();
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DataOutputStream outs = new DataOutputStream(socket.getOutputStream());
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// Set up input stream filters
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BufferedReader br = new BufferedReader(new InputStreamReader(ins));
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// Get the request line of the HTTP request
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String requestLine = br.readLine();
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// Display the request line
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System.out.println();
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System.out.println("Request:");
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System.out.println(" " + requestLine);
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// Close streams and sockets
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outs.close();
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br.close();
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socket.close();
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}
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private static void sendBytes(FileInputStream fins,
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OutputStream outs) throws Exception
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{
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// Coopy buffer
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byte[] buffer = new byte[1024];
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int bytes = 0;
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while ((bytes = fins.read(buffer)) != -1) {
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outs.write(buffer, 0, bytes);
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}
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}
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private static String contentType(String fileName)
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{
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if (fileName.toLowerCase().endsWith(".htm") ||
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fileName.toLowerCase().endsWith(".html")) {
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return "text/html";
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} else if (fileName.toLowerCase().endsWith(".gif")) {
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return "image/gif";
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} else if (fileName.toLowerCase().endsWith(".jpg")) {
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return "image/jpeg";
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} else {
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return "application/octet-stream";
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}
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}
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}
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332
WebServerTest.java
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332
WebServerTest.java
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@ -0,0 +1,332 @@
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//
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// Test program for WebServer
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// (C) 2002-2005 Anders Gidenstam
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//
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import java.io.*;
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import java.net.*;
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import java.util.*;
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import java.text.SimpleDateFormat;
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public final class WebServerTest
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{
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public static void main(String argv[]) throws Exception
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{
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// Set host and port number
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String host = "localhost";
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int port = 0;
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if (argv.length > 1) {
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for (int c = 0; c < argv.length; c++) {
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if (argv[c].equals("-p")) {
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port = Integer.parseInt(argv[++c]);
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} else if (argv[c].equals("-h")) {
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host = argv[++c];
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} else {
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System.out.println("usage: WebServerTest [-p <port>] " +
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"[-h <host>]");
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System.exit(0);
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}
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}
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} else if (argv.length != 0) {
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System.out.println("usage: WebServerTest [-p <port>] [-h <host>]");
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System.exit(0);
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}
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System.out.println("-----------------------------------------------");
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System.out.println("Testing methods on valid resource");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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Tests.HTTP_METHOD.GET, "/index.html");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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Tests.HTTP_METHOD.HEAD, "/index.html");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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"POST", "/index.html");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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"BLAHA", "/index.html");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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"GET", "/empty.txt");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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"HEAD", "/empty.txt");
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System.out.println("-----------------------------------------------");
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System.out.println("-----------------------------------------------");
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System.out.println("Testing methods on invalid resource");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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Tests.HTTP_METHOD.GET, "/nonexisting.html");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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Tests.HTTP_METHOD.HEAD, "/nonexisting.html");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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"BLAHA", "/nonexisting.html");
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System.out.println("-----------------------------------------------");
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System.out.println("-----------------------------------------------");
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System.out.println("Testing illegal request lines");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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Tests.HTTP_METHOD.GET, "this_is_actually_illegal");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest(host, port,
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Tests.HTTP_METHOD.GET, "");
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System.out.println("-----------------------------------------------");
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Tests.illegalRequest(host, port,
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Tests.HTTP_METHOD.GET + " /index.html" +
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Tests.CRLF);
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System.out.println("-----------------------------------------------");
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Tests.illegalRequest(host, port,
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"GET" + "/nonexisting.htmlHTTP/1.0 HTTP/1.0" +
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Tests.CRLF);
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System.out.println("-----------------------------------------------");
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Tests.illegalRequest(host, port,
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"GET /index.html HTTP/1.0 FLEBHL" +
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Tests.CRLF);
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System.out.println("-----------------------------------------------");
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Tests.illegalRequest(host, port,
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"HEAD /index.html FLEBHL HTTP/1.0" +
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Tests.CRLF);
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System.out.println("-----------------------------------------------");
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System.out.println("-----------------------------------------------");
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System.out.println("Testing concurrent requests and content types");
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System.out.println("-----------------------------------------------");
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HTTPRequest r1 = new HTTPRequest(host, port,
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Tests.HTTP_METHOD.GET, "/pic.jpg");
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HTTPRequest r2 = new HTTPRequest(host, port,
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Tests.HTTP_METHOD.GET, "/pic.gif");
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HTTPRequest r3 = new HTTPRequest(host, port,
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Tests.HTTP_METHOD.GET, "/pic.png");
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HTTPRequest r4 = new HTTPRequest(host, port,
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Tests.HTTP_METHOD.GET, "/pic.bin");
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// Finishing the requests in the reverse order will
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// deadlock with any non concurrent webserver. (Maybe..)
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System.out.println("R4:");
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r4.finish();
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System.out.println("R3:");
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r3.finish();
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System.out.println("R2:");
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r2.finish();
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System.out.println("R1:");
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r1.finish();
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System.out.println("-----------------------------------------------");
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System.out.println("Testing conditional GET");
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System.out.println("-----------------------------------------------");
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Tests.httpRequest2(host, port,
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Tests.HTTP_METHOD.GET,
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"/index.html",
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"If-Modified-Since: Mon, 12 Jul 2004 10:19:04 GMT");
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Date recently = new Date(new Date().getTime() - 5000);
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SimpleDateFormat rfc822date =
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new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'");
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rfc822date.setTimeZone(TimeZone.getTimeZone("GMT"));
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Tests.httpRequest2(host, port,
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Tests.HTTP_METHOD.GET,
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"/index.html",
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"If-Modified-Since: " +
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rfc822date.format(recently));
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Tests.httpRequest2(host, port,
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Tests.HTTP_METHOD.GET,
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"/index.html",
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"If-Modified-Since: Mon, 12 Jul 2006 10:19:04 GMT");
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System.out.println("-----------------------------------------------");
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}
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}
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final class Tests
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{
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final static class HTTP_METHOD
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{
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final static String GET = "GET";
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final static String HEAD = "HEAD";
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final static String POST = "POST";
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}
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final static String HTTPVERSION = "HTTP/1.0";
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final static String CRLF = "\r\n";
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static void httpRequest(String host,
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int port,
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String method,
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String resource) throws Exception
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{
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// Establish the connection
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System.out.println("----------------------------------------------");
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Socket socket = new Socket(InetAddress.getByName(host), port);
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System.out.println("----------------------------------------------");
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// Get the input and output streams of the socket.
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InputStream ins = socket.getInputStream();
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DataOutputStream outs = new DataOutputStream(socket.getOutputStream());
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// Set up input stream filters
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BufferedReader br = new BufferedReader(new InputStreamReader(ins));
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// Make request
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String request =
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makeRequestLine(method, resource, HTTPVERSION, CRLF) +
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"User-Agent: WebServerTest/1.0" + CRLF +
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CRLF;
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// Print request
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System.out.println("> Sending request: ");
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System.out.print(request);
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// Send request
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outs.writeBytes(request);
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// Read and display response
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System.out.println("> Received response: ");
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String response = null;
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while ((response = br.readLine()) != null) {
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System.out.println(response);
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}
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}
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static void httpRequest2(String host,
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int port,
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String method,
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String resource,
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String header_lines) throws Exception
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{
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// Establish the connection
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Socket socket = new Socket(InetAddress.getByName(host),
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port);
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// Get the input and output streams of the socket.
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InputStream ins = socket.getInputStream();
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DataOutputStream outs = new DataOutputStream(socket.getOutputStream());
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// Set up input stream filters
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BufferedReader br = new BufferedReader(new InputStreamReader(ins));
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// Make request
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String request =
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makeRequestLine(method, resource, HTTPVERSION, CRLF) +
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"User-Agent: WebServerTest/1.0" + CRLF +
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header_lines + CRLF +
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CRLF;
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// Print request
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System.out.println("> Sending request: ");
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System.out.print(request);
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// Send request
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outs.writeBytes(request);
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// Read and display response
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System.out.println("> Received response: ");
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String response = null;
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while ((response = br.readLine()) != null) {
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System.out.println(response);
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}
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}
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static void illegalRequest(String host,
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int port,
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String request) throws Exception
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{
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// Establish the connection
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Socket socket = new Socket(InetAddress.getByName(host),
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port);
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// Get the input and output streams of the socket.
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InputStream ins = socket.getInputStream();
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DataOutputStream outs = new DataOutputStream(socket.getOutputStream());
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// Set up input stream filters
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BufferedReader br = new BufferedReader(new InputStreamReader(ins));
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// Add final CRLF to request
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request = request + CRLF;
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// Print request
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System.out.println("> Sending request: ");
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System.out.print(request);
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// Send request
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outs.writeBytes(request);
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// Read and display response
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System.out.println("> Received response: ");
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String response = null;
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while ((response = br.readLine()) != null) {
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System.out.println(response);
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}
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}
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static String makeRequestLine(String method,
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String resource,
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String version,
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String crlf)
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{
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return method + " " + resource + " " + version + crlf;
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}
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static String makeHeaderLine(String header,
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String value,
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String crlf)
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{
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return header + ":" + value + crlf;
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}
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}
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final class HTTPRequest
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{
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Socket socket;
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String request;
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DataOutputStream outs;
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BufferedReader br;
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HTTPRequest(String host,
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int port,
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String method,
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String resource) throws Exception
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{
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// Establish the connection
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socket = new Socket(InetAddress.getByName(host),
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port);
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// Get the input and output streams of the socket.
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InputStream ins = socket.getInputStream();
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outs = new DataOutputStream(socket.getOutputStream());
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// Set up input stream filters
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br = new BufferedReader(new InputStreamReader(ins));
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// Make request
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request =
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Tests.makeRequestLine(method, resource, Tests.HTTPVERSION,
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Tests.CRLF) +
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"User-Agent: WebServerTest/1.0" + Tests.CRLF +
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Tests.CRLF;
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}
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void finish() throws Exception
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{
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// Print request
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System.out.println("> Sending request: ");
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System.out.print(request);
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// Send request
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outs.writeBytes(request);
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// Read and display response
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System.out.println("> Received response: ");
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String response = null;
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while ((response = br.readLine()) != null) {
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System.out.println(response);
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}
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}
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}
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