Hello,
This probably sounds like something that I could just simply look up on the internet, but not quite. I have put in 4 hours already trying to find my answer of how to create an executable .jar file, but I have had no luck so far. My code is posted below, it compiles in Blue J by calling the method void main(String []args)... , but I would like to put it in an executable file such that it runs after one click. Does anyone know how to do this? Actually, you can see my code more easily at http://snyp40a1.tripod.com
Thanks for your help!
-HM
import java.io.* ;
import java.net.* ;
import java.util.* ;
public final class WebServer
{
public static void main(String argv[]) throws Exception
{
// Set the port number.
int port = 6789;
// Establish the listen socket.
ServerSocket listenSocket = new ServerSocket(port);
// Process HTTP service requests in an infinite loop.
while (true) {
// Listen for a TCP connection request.
Socket connectionSocket = listenSocket.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 = "\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 fault) {
System.out.println(fault);
}
}
//Specify the proper content type for content-type header.
private String contentType(String fileName)
{
if(fileName.endsWith(".htm") || fileName.endsWith(".html"))
{
return "text/html";
}
if(fileName.endsWith(".jpg"))
{
return "image/jpeg";
}
if(fileName.endsWith(".gif"))
{
return "image/gif";
}
if(fileName.endsWith(".doc"))
{
return "application/msword";
}
else return "application/octet-stream";
}
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 void processRequest() throws Exception
{
// Get a reference to the socket's input and output streams.
InputStream is = this.socket.getInputStream();
DataOutputStream os = new DataOutputStream(this.socket.getOutputStream());
// Set up input stream filters.
InputStreamReader is2 = new InputStreamReader(is);
BufferedReader br = new BufferedReader(is2);
// Get the request line of the HTTP request message.
String requestLine = br.readLine();
// Display the request line.
System.out.println();
System.out.println(requestLine);
// Get and display the header lines.
String headerLine = null;
while ((headerLine = br.readLine()).length() != 0)
{
System.out.println(headerLine);
}
// 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 file exists, send the OK message along with content-type.
//Otherwise send the 404 File Not found error message.
if (fileExists) {
statusLine = "HTTP/1.0 200 OK" + CRLF;
contentTypeLine = "Content-type: " +
contentType( fileName ) + CRLF;
} else {
statusLine = "HTTP/1.0 404 Not Found" + CRLF;
contentTypeLine = "Not applicable";
entityBody = "<HTML>" +
"<HEAD><TITLE>Not Found</TITLE></HEAD>" +
"<BODY>Not Found</BODY></HTML>";
}
// 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();
}
}
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