I am creating a project in JAVA, where I start a WEB server on the client machine, and I need to load a page in addition to showing the page content in the browser call a JOptionPane, but is giving the following error:
Exception in thread "Thread-5" java.lang.NullPointerException at
java.util.StringTokenizer. <init> (StringTokenizer.java:199) at
java.util.StringTokenizer. <init> (StringTokenizer.java:236) at
pt.paysafe.Server.run (Server.java:44) at java.lang.Thread.run
(Thread.java:748)
I already tried removing the thread from the paysafe.java file and simply giving a server.run(); But then the page is infinitely loading and shows no error.
Does anyone know how I solve this?
Code:
PaySafe.java
package pt.paysafe;
import java.io.IOException;
import java.net.ServerSocket;
import javax.swing.JOptionPane;
public class PaySafe {
static final int PORT = 8080;
private static void servidorHttp(){
try{
ServerSocket serverConnect = new ServerSocket(PORT);
while(true){
Servidor server = new Servidor(serverConnect.accept());
Thread thread = new Thread(server);
thread.start();
}
} catch (IOException ex){
JOptionPane.showMessageDialog(null, ex.getMessage(), "Erro", JOptionPane.ERROR_MESSAGE);
}
}
public static void main(String[] args){
servidorHttp();
}
}
Servidor.java (Servidor = server) :
package pt.paysafe;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Date;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JOptionPane;
public class Servidor implements Runnable{
static final File WebRoot = new File(".");
static final String DefaultPage = "index.html";
static final String FileNotFound = "404.html";
static final String MethodNotSupported = "notSupported.html";
private Socket connect;
public Servidor(Socket c) {
connect = c;
}
@Override
public void run() {
BufferedReader in = null;
PrintWriter out = null;
BufferedOutputStream dataOut = null;
String fileRequested = null;
try{
in = new BufferedReader(new InputStreamReader(connect.getInputStream()));
out = new PrintWriter(connect.getOutputStream());
dataOut = new BufferedOutputStream(connect.getOutputStream());
String input = in.readLine();
StringTokenizer parse = new StringTokenizer(input);
String method = parse.nextToken().toUpperCase();
fileRequested = parse.nextToken().toLowerCase();
if(!method.equals("GET") && !method.equals("HEAD")){
File file = new File(WebRoot, MethodNotSupported);
int fileLength = (int) file.length();
String contentMimeType = "text/html";
byte[] fileData = readFileData(file, fileLength);
out.println("HTTP/1.1 501 Not Implemented");
out.println("Server: Servidor Plugin PaySafe");
out.println("Date: " + new Date());
out.println("Content-type: " + contentMimeType);
out.println("Content-length: " + fileLength);
out.println();
out.flush();
dataOut.write(fileData, 0, fileLength);
dataOut.flush();
}else{
if(fileRequested.endsWith("/")){
fileRequested += DefaultPage;
}
File file = new File(WebRoot, fileRequested);
int fileLength = (int) file.length();
String contentmt = getContentType(fileRequested);
if(method.equals("GET")){
int showed = 0;
if(showed == 0){
JOptionPane.showMessageDialog(null, "Sucesso!", "OK", JOptionPane.INFORMATION_MESSAGE);
showed = 1;
}
byte[] fileData = readFileData(file, fileLength);
out.println("HTTP/1.1 200 OK");
out.println("Server: Servidor Plugin PaySafe");
out.println("Date: " + new Date());
out.println("Content-type: " + contentmt);
out.println("Content-length: " + fileLength);
out.println();
out.flush();
dataOut.write(fileData, 0, fileLength);
dataOut.flush();
}
}
}catch (FileNotFoundException fnfe){
try{
fileNotFound(out, dataOut, fileRequested);
}catch(IOException ioe){
JOptionPane.showMessageDialog(null, ioe.getMessage(), "Erro", JOptionPane.ERROR_MESSAGE);
}
} catch (IOException ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Erro", JOptionPane.ERROR_MESSAGE);
} finally {
try {
in.close();
out.close();
dataOut.close();
connect.close();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e.getMessage(), "Erro", JOptionPane.ERROR_MESSAGE);
}
}
}
private byte[] readFileData(File file, int fileLength) throws IOException {
FileInputStream fileIn = null;
byte[] fileData = new byte[fileLength];
try{
fileIn = new FileInputStream(file);
fileIn.read(fileData);
}finally{
if(fileIn != null){
fileIn.close();
}
}
return fileData;
}
private String getContentType(String fileRequested) {
if(fileRequested.endsWith(".htm") || fileRequested.endsWith(".html")){
return "text/html";
}else if(fileRequested.endsWith(".ico")){
return "image/ico";
}else if(fileRequested.endsWith(".png")){
return "image/png";
}else{
return "text/plain";
}
}
private void fileNotFound(PrintWriter out, OutputStream dataOut, String fileRequested) throws IOException {
File file = new File(WebRoot, FileNotFound);
int fileLenght = (int) file.length();
String content = "text/html";
byte[] fileData = readFileData(file, fileLenght);
out.println("HTTP/1.1 404 Not Found");
out.println("Server: Servidor Plugin PaySafe");
out.println("Date: " + new Date());
out.println("Content-type: " + content);
out.println("Content-length: " + fileLenght);
out.println();
out.flush();
dataOut.write(fileData, 0, fileLenght);
dataOut.flush();
}
}
