try {
// Get the port to listen on
int port = Integer.parseInt(args[0]);
// Create a ServerSocket to listen on that port.
ServerSocket ss = new ServerSocket(port);
// Now enter an infinite loop, waiting for connections and handling them.
for(;;) {
// Wait for a client to connect. The method will block, and when it
// returns the socket will be already connected to the client
Socket client = ss.accept();
// Get input and output streams to talk to the client from the socket
BufferedReader in =
new BufferedReader(new InputStreamReader(client.getInputStream()));
PrintWriter out =
new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
// Start sending our reply, using the HTTP 1.0 protocol
out.println("HTTP/1.0 200 "); // Version & status code
out.println("Content-Type: text/plain"); // The type of data we send
out.println(); // End of response headers
out.flush();
// Now, read the HTTP request from the client, and send it right
// back to the client as part of the body of our response.
// The client doesn't disconnect, so we never get an EOF.
// It does sends an empty line at the end of the headers, though.
// So when we see the empty line, we stop reading. This means we
// don't mirror the contents of POST requests, for example.
String line;
while((line = in.readLine()) != null) {
if (line.length() == 0) break;
out.println(line);
}
// Close the streams and socket, breaking the connection to the client
out.close();
in.close();
client.close();
} // Loop again, waiting for the next connection
}
// If anything goes wrong, print an error message
catch (Exception e) {
System.err.println(e);
System.err.println("Usage: java HttpMirror <port>");
}
