public void startServer() throws Exception {
while (true) {
Socket s = server.accept();
cClient.add(new ClientConn(s));
ta.append("NEW-CLIENT " + s.getInetAddress() + ":" + s.getPort());
ta.append("\n" + "CLIENTS-COUNT: " + cClient.size() + "\n\n");
}
}
/**
* opens the chosen file, reads in the file, and prints out a receipt
*
* @param chosenFile
*/
private void readSource(File chosenFile) {
String chosenFileName = chosenFile.getName();
TextFileInput inFile = new TextFileInput(chosenFileName);
Container myContentPane = jframe.getContentPane();
// chosenFile TextArea myTextArea = new TextArea();
myContentPane.add(myTextArea);
int count = 0;
float priceTotal = 0.0f;
Database db = new Database("database2.txt");
String[] transaction = new String[100];
String line = inFile.readLine();
DecimalFormat df = new DecimalFormat("#00.00");
while (line != null) {
StringTokenizer tokenized = new StringTokenizer(line, ",");
String code = tokenized.nextToken();
float weight = Float.parseFloat(tokenized.nextToken());
String name;
float price;
try {
name = db.getName(code);
} catch (ItemNotFoundException e) {
name = JOptionPane.showInputDialog(null, "Item " + code + " not found. Enter Name: ");
}
try {
price = db.getPrice(code);
} catch (ItemNotFoundException e) {
price =
Float.valueOf(
JOptionPane.showInputDialog(
null, "Price for " + name + " not found. Enter price: "));
}
float itemTotal = weight * price;
priceTotal += itemTotal;
transaction[count] =
name + "\t" + price + "\t" + df.format(weight) + "\t $" + df.format(itemTotal);
count++;
line = inFile.readLine();
} // while
myTextArea.setText("ITEM: \t PRICE\\LB: \t POUNDS: \t TOTAL:");
myTextArea.append("\n");
for (int i = 0; i < count; i++) {
myTextArea.append(transaction[i]);
myTextArea.append("\n");
}
myTextArea.append("\t\t TOTAL: $" + df.format(priceTotal));
jframe.setVisible(true);
} // openFile
// Close socket and IO streams, change appearance/functionality of some components
private void closeAll() throws IOException {
displayArea.append("\nConnection closing");
output.close();
input.close();
connection.close();
// We are no longer connected
connection = null;
// Change components
serverField.setEditable(true);
connectButton.setLabel("Connect to server above");
enterField.setEnabled(false);
}
private void go() {
try {
// Read as long as there is input
byte[] buffer = new byte[ciphertextBlockSize];
boolean disconnectMsgSent = false;
while (connection != null && !disconnectMsgSent && input.read(buffer) != -1) {
// Decipher the bytes read in
byte[] plaintext = Ciphers.RSADecipherWSalt(buffer, decipherExp, modulus);
if (plaintext.length == 1 && plaintext[0] == 0) {
disconnectMsgSent = true;
closeAll();
} else {
// convert to a string and display
message = new String(plaintext);
displayArea.append("\n" + message);
}
}
} catch (IOException ioe) {
// Server disconnected-we can reconnect if we wish
}
}
public void log(String s) {
synchronized (eventLogLock) {
eventLog.append("[" + org.jcq2k.util.joe.Logger.formatCurrentDate() + "]\t" + s);
eventLog.append("\n");
}
}
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
// Client pressed enter in the message entry field-send it
if (source == enterField) {
// Get the message
message = e.getActionCommand();
try {
// Encipher the message
if (message.length() > plaintextBlockSize)
message = message.substring(0, plaintextBlockSize);
byte[] ciphertext =
Ciphers.RSAEncipherWSalt(message.getBytes(), BigIntegerMath.THREE, recipModulus, sr);
// Send to the server
output.write(ciphertext);
output.flush();
// Display same message in client output area
displayArea.append("\n" + message);
enterField.setText("");
} catch (IOException ioe) {
displayArea.append("\nError writing message");
}
} else if (source == connectButton) {
if (connection != null) { // Already connected-button press now means disconnect
try {
// Send final message of 0
byte[] lastMsg = new byte[1];
lastMsg[0] = 0;
output.write(Ciphers.RSAEncipherWSalt(lastMsg, BigIntegerMath.THREE, recipModulus, sr));
output.flush();
// close connection and IO streams, change some components
closeAll();
} catch (IOException ioe) {
displayArea.append("\nError closing connection");
}
} else { // Not connected-connect
// Get name of server to connect to
chatServer = serverField.getText();
displayArea.setText("Attempting connection to " + chatServer);
try {
// Set up the socket
connection = new Socket(chatServer, 55555);
displayArea.append("\nConnected to: " + connection.getInetAddress().getHostName());
// Set up the IO streams
output = new DataOutputStream(connection.getOutputStream());
output.flush();
input = new DataInputStream(connection.getInputStream());
// Exchange public keys with the server-send yours, get theirs
exchangeKeys();
// Change appearance/functionality of some components
serverField.setEditable(false);
connectButton.setLabel("Disconnect from server above");
enterField.setEnabled(true);
// Set up a thread to listen for the connection
listener =
new Thread(
new Runnable() {
public void run() {
go();
}
});
listener.start();
} catch (IOException ioe) {
displayArea.append("\nError connecting to " + chatServer);
}
}
}
}
