Hi guys, Im trying to implement persistent connection in this code. It must have keep alive, timeout and content length header. The client must open a test.html file with jpeg or jpg pictures inside the html file. For example localhost:4000/test.html. The test.html must be inside the werbserver2 folder.

Example of the html

image:

import java.io.* ; import java.net.* ; import java.util.* ; public final class webserver2 { public static void main(String argv[]) throws Exception { // Set the port number. int port = 9999; // Establish the listen socket. ServerSocket welcomeSocket = new ServerSocket(port); // Process HTTP service requests in an infinite loop. //while (true) {//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////dont use while loop for persistent connection // Listen for a TCP connection request. Socket connectionSocket = welcomeSocket.accept(); // Construct an object to process the HTTP request message. HttpRequest request = new HttpRequest( connectionSocket ); // Create a new thread to process the request. Thread thread = new Thread(request); // Start the thread. thread.start(); }

}

}/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// final class HttpRequest implements Runnable { final static String CRLF = " ";//returning carriage return (CR) and a line feed (LF) Socket socket; // Constructor public HttpRequest(Socket socket) throws Exception { this.socket = socket; } // Implement the run() method of the Runnable interface. //Within run(), we explicitly catch and handle exceptions with a try/catch block. 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 instream = socket.getInputStream(); DataOutputStream os = new DataOutputStream(socket.getOutputStream()); // Set up input stream filters. // Page 169 10th line down or so... BufferedReader br = new BufferedReader(new InputStreamReader(instream));//reads the input data // Get the request line of the HTTP request message. String requestLine = br.readLine();// get /path/file.html version of http // Display the request line. System.out.println(); System.out.println(requestLine); // HERE WE NEED TO DEAL WITH THE REQUEST // Extract the filename from the request line. StringTokenizer tokens = new StringTokenizer(requestLine);// this is a input method with deliminators 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 OK" + CRLF; //common success message contentTypeLine = "Content-type: " + contentType( fileName ) + CRLF;}//content info else { statusLine = "HTTP/1.0 404 Not Found" + CRLF;//common error message contentTypeLine = "Content-type: " + "text/html" + CRLF;//content info entityBody = "" + "

" + "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); os.writeBytes(statusLine);//Send the status line. os.writeBytes(contentTypeLine);//Send the content type line. fis.close(); } else { os.writeBytes(statusLine);//Send the status line. os.writeBytes(entityBody);//Send the an html error message info body. os.writeBytes(contentTypeLine);//Send the content type line. } System.out.println("*****"); System.out.println(fileName);//print out file request to console System.out.println("*****"); // Get and display the header lines. String headerLine = null; while ((headerLine = br.readLine()).length() != 0) { System.out.println(headerLine); } //code from part 1 // Right here feed the client something //os.writeBytes("

My First Heading

"); //os.writeBytes( "

My first paragraph.

"); //os.flush(); // Close streams and socket. os.close(); br.close(); socket.close(); } //return the file types 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"; } //set up input output streams 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 )// read() returns minus one, indicating that the end of the file { os.write(buffer, 0, bytes); }

} }