Wai Le

Hi all,
I would like to know how can a servlet return an array to the midlet?
I have seen many example which just simply return a string to the midlet.
Can someone gives me some tips about it and I will be glad about it.Thx

Hi all,
I would like to know that how can a servlet return a object(i.e array of string) to a midlet?
I found that a midlet cannot support the ObjectInputStream/ObjectOutputStream class.
So, is it any other types of Stream is spporting this feature.

Hi all,
I have wirte a midlet which simply give 2 parameters (user & pwd) to the servlet which is for authenticating the user to retrieve his/her e-mail inbox account.
the coding is below:
import javax.servlet.*;
import java.io.*;
import javax.servlet.http.*;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
public class ServletMailLogin extends HttpServlet{
String user,pwd;
public void doPost(HttpServletRequest req ,HttpServletResponse res) throws IOException, ServletException
{res.setContentType("text/plain");
PrintWriter out = res.getWriter();
user = req.getParameter("user");
pwd = req.getParameter("pwd");

try{
Properties props = new Properties();
//place the authentication info in
props.put("mail.smtp.host","thomaslee1121.no-ip.com");
props.put("mail.smtp.host","true");
// create an empty authenticator object
Authenticator auth = new SMTPAuthenticator();
// Get a session - pass auth object
Session session = Session.getDefaultInstance(props, auth);
Store store = session.getStore("smtp");
// do not pass any arguments to the connect method
store.connect();
Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_ONLY);
Message messages[] = folder.getMessages();
for (int i=0; i<messages.length; i++) {
out.print(i + ": " + messages[i].getFrom()[0] + "\t" + messages[i].getSubject() + "\t" + messages[i].getSentDate() + "\n\n");
}
folder.close(false);
store.close();
}
catch (MessagingException me) {
System.err.print(user);
}


}

private class SMTPAuthenticator extends javax.mail.Authenticator{
public PasswordAuthentication getPasswordAuthentication(){
String username,password;

username = ServletMailLogin.this.user;
password = ServletMailLogin.this.pwd;
return new PasswordAuthentication(username,password);
}
}
}
compliation is not problem but it will just return me a empty(not null!!) content to the emulator.
Can someone give me advice PLS??

Hi all,
I found some problems that I want to use the emulator to login the mail(smtp) server.
I have a conole example which can successfully login the server and retrieve the mail in different mail box, however, when I "convert" the source to the servlet code, it prompted me so many error.
Lastly, I hope that there are some similar example for the reference. Thx

Actually do you have any examples which is similar to my coding?

import javax.microedition.rms.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import java.io.*;
import java.util.Vector;
public class SecondMidletServlet extends MIDlet implements CommandListener {
Display display = null;
List menu = null;
TextBox input = null;
String user = null;
String url = "http://localhost:8080/examples/servlet/RequestServlet";
static final Command backCommand = new Command("Back", Command.BACK, 0);
static final Command submitCommand = new Command("Submit", Command.OK, 2);
static final Command exitCommand = new Command("Exit", Command.STOP, 3);
String currentMenu = null;
public SecondMidletServlet() {
}
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
menu = new List("Invoke Servlet", Choice.IMPLICIT);
menu.append("Add a user", null);
menu.addCommand(exitCommand);
menu.setCommandListener(this);
mainMenu();
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
void mainMenu() {
display.setCurrent(menu);
}
public void addName() {
input = new TextBox("Enter first name:", "", 5, TextField.ANY);
input.addCommand(submitCommand);
input.addCommand(backCommand);
input.setCommandListener(this);
input.setString("");
display.setCurrent(input);
}
void invokeServlet(String url) throws IOException {
HttpConnection c = null;
InputStream is = null;
OutputStream os = null;
StringBuffer b = new StringBuffer();
TextBox t = null;
try {
c = (HttpConnection)Connector.open(url);
c.setRequestMethod(HttpConnection.POST);
c.setRequestProperty("IF-Modified-Since", "20 Jan 2001 16:19:14 GMT");
c.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0");
c.setRequestProperty("Content-Language", "en-CA");

os = c.openOutputStream();
os.write(("name="+user).getBytes());
System.out.println("Length: "+("name="+user).getBytes());

// or you can easily do:
// os.write(("name="+user).getBytes());
os.flush();
is = c.openDataInputStream();
int ch;
while ((ch = is.read()) != -1) {
b.append((char) ch);
System.out.print((char)ch);
}
t = new TextBox("Second Servlet", b.toString(), 1024, 0);
t.addCommand(backCommand);
t.setCommandListener(this);
} finally {
if(is!= null) {
is.close();
}
if(os != null) {
os.close();
}
if(c != null) {
c.close();
}
}
display.setCurrent(t);
}
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Exit")) {
destroyApp(true);
} else if (label.equals("Back")) {
mainMenu();
} else if (label.equals("Submit")) {
user = input.getString();
try {
invokeServlet(url);
}catch(IOException e) {}
} else {
addName();
}
}
}

Hi Mark,
I replace a part of code with the code you provided of the previous post, but it cannot still work, it will return the null value me.
Any suggestions??

Hi all,
I wrote a simple midlet which just pass the parameter to the servlet and the servlet will return the parameter to the midlet.
I am sure that the coding of midlet is correct. The coding below is the servlet I modified. Can someone tell me that is the mistake
of it?
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
Public class RequestServlet extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException,ServletException{
response.setContentType("text/plain");
PrintWriter out = response.getWriter();
String user = (String)request.getParameter("user");
out.print("Rec: "+user);
}

}