/**
* Read a cookie
*
* @param name The name of the cookie
* @return The value of the cookie, if the cookie does not exist it will return an empty string
*/
protected String getCookie(String name) {
/*
** get a specific cookie by its name, parse the cookie.
** not used in this Applet but can be useful
*/
String myCookie = getCookie();
String search = name + "=";
if (myCookie.length() > 0) {
int offset = myCookie.indexOf(search);
if (offset != -1) {
offset += search.length();
int end = myCookie.indexOf(";", offset);
if (end == -1) {
end = myCookie.length();
}
Log.println(this, "get: " + myCookie.substring(offset, end));
if (!myCookie.substring(offset, end).equals(" ")) {
return myCookie.substring(offset, end);
} else {
return "";
}
} else Log.println(this, "Did not find cookie: " + name);
}
return "";
}
/**
* This method listens for connection requests and when a connection is made, the serve() method
* is called to serve the client.
*/
public void run() {
System.out.println("S: Entering Server run()");
while (!halted) {
try {
log.println("S: about to call serverSocket.accept()");
Socket clientSocket = serverSocket.accept();
log.println("S: just returned from serverSocket.accept()");
log.println("S: about to create a ClientServicer");
ClientServicer clientServicer = new ClientServicer(clientSocket, nextID++);
clientServicer.start();
clientServicers.add(clientServicer);
log.println("S: just returned from creating a ClientServicer");
} catch (IOException e) {
System.err.println("S: Exception: " + e);
e.printStackTrace();
break;
}
}
log.println("S: Exiting Server run()");
}
/**
* Write a cookie
*
* @param name The name of the cookie
* @param value The value to write
*/
protected void setCookie(String name, String value) {
value = cleanValue(value);
/*
** write a cookie
** computes the expiration date, good for 1 month
*/
java.util.Calendar c = java.util.Calendar.getInstance();
c.add(java.util.Calendar.YEAR, 1);
String expires = "; expires=" + c.getTime().toString();
String s1 = name + "=" + value + expires;
Log.println(this, s1);
try {
JSObject myBrowser = JSObject.getWindow(applet);
JSObject myDocument = (JSObject) myBrowser.getMember("document");
myDocument.setMember("cookie", s1);
Log.println(this, "set:" + s1);
} catch (JSException e) {
e.printStackTrace();
}
}
/**
* Delete a cookie
*
* @param name The name of the cookie
*/
protected void deleteCookie(String name) {
setCookie(name, " ");
/*
** delete a cookie, set the expiration in the past
*/
java.util.Calendar c = java.util.Calendar.getInstance();
c.add(java.util.Calendar.MONTH, -1);
String expires = "; expires=" + c.getTime().toString();
String s1 = name + expires;
try {
JSObject myBrowser = JSObject.getWindow(applet);
JSObject myDocument = (JSObject) myBrowser.getMember("document");
Log.println(this, "del: " + s1);
myDocument.setMember("cookie", s1);
} catch (JSException e) {
e.printStackTrace();
}
}
/**
* This constructor creates an EchoServer object
*
* @param portnum The port that the server will listen on.
* @throws IOException
*/
public EchoServer(int portnum, Log log) throws IOException {
this.log = log;
log.println("S: Entering the constructor for EchoServer");
serverSocket = new ServerSocket(portnum);
log.println("S: Exiting the constructor for EchoServer");
}