//*************************************** // HTTP Server // fpont June 2000 // server implements HTTP GET method //*************************************** import java.net.*; import java.io.*; import java.util.*; import java.lang.*; public class httpServer { public static void main(String args[]) { int port; ServerSocket server_socket; try { port = Integer.parseInt(args[0]); } catch (Exception e) { port = 1500; } try { server_socket = new ServerSocket(port); System.out.println("httpServer running on port " + server_socket.getLocalPort()); // server infinite loop while(true) { Socket socket = server_socket.accept(); System.out.println("New connection accepted " + socket.getInetAddress() + ":" + socket.getPort()); // Construct handler to process the HTTP request message. try { httpRequestHandler request = new httpRequestHandler(socket); // Create a new thread to process the request. Thread thread = new Thread(request); // Start the thread. thread.start(); } catch(Exception e) { System.out.println(e); } } } catch (IOException e) { System.out.println(e); } } } class httpRequestHandler implements Runnable { final static String CRLF = "\r\n"; Socket socket; InputStream input; OutputStream output; BufferedReader br; // Constructor public httpRequestHandler(Socket socket) throws Exception { this.socket = socket; this.input = socket.getInputStream(); this.output = socket.getOutputStream(); this.br = new BufferedReader(new InputStreamReader(socket.getInputStream())); } // 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 { while(true) { String headerLine = br.readLine(); System.out.println(headerLine); if(headerLine.equals(CRLF) || headerLine.equals("")) break; StringTokenizer s = new StringTokenizer(headerLine); String temp = s.nextToken(); if(temp.equals("GET")) { String fileName = s.nextToken(); 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 serverLine = "Server: fpont simple java httpServer"; String statusLine = null; String contentTypeLine = null; String entityBody = null; String contentLengthLine = "error"; if ( fileExists ) { statusLine = "HTTP/1.0 200 OK" + CRLF ; contentTypeLine = "Content-type: " + contentType( fileName ) + CRLF ; contentLengthLine = "Content-Length: " + (new Integer(fis.available())).toString() + CRLF; } else { statusLine = "HTTP/1.0 404 Not Found" + CRLF ; contentTypeLine = "text/html" ; entityBody = "<HTML>" + "<HEAD><TITLE>404 Not Found</TITLE></HEAD>" + "<BODY>404 Not Found" +"<br>usage:http://yourHostName:port/" +"fileName.html</BODY></HTML>" ; } // Send the status line. output.write(statusLine.getBytes()); // Send the server line. output.write(serverLine.getBytes()); // Send the content type line. output.write(contentTypeLine.getBytes()); // Send the Content-Length output.write(contentLengthLine.getBytes()); // Send a blank line to indicate the end of the header lines. output.write(CRLF.getBytes()); // Send the entity body. if (fileExists) { sendBytes(fis, output) ; fis.close(); } else { output.write(entityBody.getBytes()); } } } try { output.close(); br.close(); socket.close(); } catch(Exception e) {} } 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"; } return ""; } }
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