Hallo Leute,
Ich hab ein kleines Problem ich versuch gerade ein kleinen Webserver zu schreiben allerdings bekomme ich immer diese Fehlermeldung:
java.lang.IllegalArgumentException: No request data found
Ich hab ein kleines Problem ich versuch gerade ein kleinen Webserver zu schreiben allerdings bekomme ich immer diese Fehlermeldung:
java.lang.IllegalArgumentException: No request data found
Java:
package com.yissugames.web;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Webserver {
public Webserver(int port)
{
try {
final ServerSocket socket = new ServerSocket(port);
for(;;) {
final Socket clientSocket = socket.accept();
final HTTPWorker httpWorker = new HTTPWorker(clientSocket);
(new Thread(httpWorker)).run();
}
} catch (IOException e) {
e.printStackTrace();
System.exit(1);
}
}
public static void main(String[] args)
{
int port = 80;
if(args.length == 1)
{
if(isInteger(args[0]))
{
port = Integer.parseInt(args[0]);
}
}
new Webserver(port);
}
private static boolean isInteger(String s)
{
try{
Integer.parseInt(s);
return true;
} catch (Exception e) {
return false;
}
}
}
class HTTPWorker implements Runnable
{
private Socket clientSocket;
public HTTPWorker(final Socket clientSocket)
{
this.clientSocket = clientSocket;
}
@Override
public void run() {
System.out.println("====================");
try {
final InputStream is = clientSocket.getInputStream();
final int bytesToRead = is.available();
if(bytesToRead == 0) {
throw new IllegalArgumentException("No request data found");
}
final byte[] barray = new byte[bytesToRead];
is.read(barray, 0, bytesToRead);
final String client_data = new String(barray);
final String regex = ".*GET (.*) HTTP.*";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.DOTALL);
final Matcher matcher = pattern.matcher(client_data);
if(matcher.matches()) {
final String requestedPage = matcher.group(1);
final String content = "";
final String data = buildHeader(content.length(), "404 Not Found");
clientSocket.getOutputStream().write(data.getBytes());
clientSocket.getOutputStream().write(content.getBytes());
System.out.println("404-Error");
}
} catch (final Exception e) {
e.printStackTrace();
final String content = "<html><head><title>500 - Internal Server Error</title></head><body><h1>500 - Internal Server Error</h1>" + e.getMessage() + "<br /><pre>" + stackTraceToString(e.getStackTrace()) + "</pre></body></html>";
final String data = buildHeader(content.length(), "500 Internal Server Error");
try {
clientSocket.getOutputStream().write(data.getBytes());
clientSocket.getOutputStream().write(content.getBytes());
System.out.println("Server-Error");
} catch (final Exception e2) {
System.out.println("Can't answere to server");
}
}
System.out.println("====================");
}
private String buildHeader(final int stringLength, final String httpState)
{
return "HTTP/1.1 " + httpState + "\n" + "Content-Length: "
+ stringLength + "\n" + "Content-Type: text/html\n"
+ "Connection: close\n\n";
}
private String stackTraceToString(StackTraceElement[] stacktrace)
{
StringBuilder builder = new StringBuilder();
for(StackTraceElement element: stacktrace)
{
builder.append(element);
builder.append(System.getProperty("line.separator"));
}
return builder.toString();
}
private void closeSocketNE()
{
try
{
clientSocket.close();
} catch(IOException e) {
e.printStackTrace();
}
}
}
