Not Found

import java.io.*; import java.net.*; import java.util.*; final class HttpRequest implements Runnable { final static String CRLF = "\r\n"; Socket socket; // Constructor public HttpRequest(Socket socket) throws Exception { this.socket = socket; } // Implement the run() method of the Runnable interface. public void run() { try { processRequest(); } catch (Exception e) { System.out.println(e); } } private void processRequest() throws Exception { // Get a reference to the socket's input and output streams. InputStream is = socket.getInputStream(); DataOutputStream os = new DataOutputStream(socket.getOutputStream()); // Set up input stream filters. BufferedReader br = new BufferedReader(new InputStreamReader(is)); // Get the request line of the HTTP request message. String requestLine = br.readLine(); // Extract the filename from the request line. StringTokenizer tokens = new StringTokenizer(requestLine); tokens.nextToken(); // skip over the method, which should be "GET" String fileName = tokens.nextToken(); // Prepend a "." so that file request is within the current directory. fileName = "." + fileName; // Open the requested file. FileInputStream fis = null; boolean fileExists = true; try { fis = new FileInputStream(fileName); } catch (FileNotFoundException e) { fileExists = false; } // Construct the response message. String statusLine = null; String contentTypeLine = null; String entityBody = null; if (fileExists) { statusLine = "HTTP/1.0 200 Document Follows" + CRLF; contentTypeLine = "Content-type: " + contentType( fileName ) + CRLF; } else { statusLine = "HTTP/1.0 404 Not Found" + CRLF; contentTypeLine = "Content-type: text/html"; entityBody = "" + "Not Found" + "Not Found"; } // Send the status line. os.writeBytes(statusLine); // Send the content type line. os.writeBytes(contentTypeLine); // Send a blank line to indicate the end of the header lines. os.writeBytes(CRLF); // Send the entity body. if (fileExists) { sendBytes(fis, os); fis.close(); } else { os.writeBytes(entityBody); } // Close streams and socket. os.close(); br.close(); socket.close(); } private static void sendBytes(FileInputStream fis, OutputStream os) throws Exception { // Construct a 1K buffer to hold bytes on their way to the socket. byte[] buffer = new byte[1024]; int bytes = 0; // Copy requested file into the socket's output stream. while((bytes = fis.read(buffer)) != -1 ) { os.write(buffer, 0, bytes); } } private static String contentType(String fileName) { if(fileName.endsWith(".htm") || fileName.endsWith(".html")) { return "text/html"; } if(fileName.endsWith(".jpg") || fileName.endsWith(".jpeg")) { return "image/jpeg"; } if(fileName.endsWith(".gif")) { return "image/gif"; } return "application/octet-stream"; } }