Java by API/javax.microedition.io/HttpConnection

HttpConnection: getFile()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection: getHeaderField(String value) throws IOException

 

import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
public class CookieMIDlet extends MIDlet implements CommandListener, Runnable {
  private Display mDisplay;
  private Form mForm;
  private String mSession;
  public void startApp() {
    mDisplay = Display.getDisplay(this);
    mForm = new Form("CookieMIDlet");
    mForm.addCommand(new Command("Exit", Command.EXIT, 0));
    mForm.addCommand(new Command("Send", Command.SCREEN, 0));
    mForm.setCommandListener(this);
 
    mDisplay.setCurrent(mForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c.getCommandType() == Command.EXIT)
      notifyDestroyed();
    else {
      Form waitForm = new Form("Connecting...");
      mDisplay.setCurrent(waitForm);
      Thread t = new Thread(this);
      t.start();
    }
  }
  public void run() {
    String url = getAppProperty("CookieMIDlet-URL");
    try {
      HttpConnection hc = (HttpConnection) Connector.open(url);
      if (mSession != null)
        hc.setRequestProperty("cookie", mSession);
      InputStream in = hc.openInputStream();
      String cookie = hc.getHeaderField("Set-cookie");
      if (cookie != null) {
        int semicolon = cookie.indexOf(";");
        mSession = cookie.substring(0, semicolon);
      }
      int length = (int) hc.getLength();
      byte[] raw = new byte[length];
      in.read(raw);
      String s = new String(raw);
      Alert a = new Alert("Response", s, null, null);
      a.setTimeout(Alert.FOREVER);
      mDisplay.setCurrent(a, mForm);
      in.close();
      hc.close();
    } catch (IOException ioe) {
      Alert a = new Alert("Exception", ioe.toString(), null, null);
      a.setTimeout(Alert.FOREVER);
      mDisplay.setCurrent(a, mForm);
    }
  }
}

HttpConnection: getPort()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection: getProtocol()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection: getQuery()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection: getRef()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection: getRequestMethod()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection: getURL()

 
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class ConnectHttpMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand  = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand= new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://www.g.ru/p=MDIP&u=b&y=y&hc=0&hs=0";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public ConnectHttpMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Data");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "failed";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      content += "URL: " + hpc.getURL() + "\n";
      content += "Protocol: " + hpc.getProtocol() + "\n";
      content += "Host: " + hpc.getHost() + "\n";
      content += "Port: " + hpc.getPort() + "\n";
      content += "File: " + hpc.getFile() + "\n";
      content += "Query: " + hpc.getQuery() + "\n";
      content += "reference: " + hpc.getRef() + "\n";
      content += "request method: " + hpc.getRequestMethod();
      if (hpc != null)
        hpc.close();
    } catch (IOException e2) {
    }
    return content;
  }
}

HttpConnection.HTTP_OK

 

import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class HttpMIDlet extends MIDlet implements CommandListener, Runnable {
  private Display display;
  private Form addressForm = new Form("HTTP Client");
  private Form connectForm = new Form("Connecting");
  private Form displayForm = new Form("Server Reply");
  private TextField serverURL = new TextField("URL:", "", 256, TextField.ANY);
  private StringItem messageLabel = new StringItem(null, "Connecting...\nPlease wait.");
  private Command okCommand = new Command("OK", Command.OK, 0);
  private Command exitCommand = new Command("Exit", Command.EXIT, 0);
  private Command backCommand = new Command("Back", Command.BACK, 0);
  
  protected void startApp() throws MIDletStateChangeException {
    display = Display.getDisplay(this);
    addressForm.append(serverURL);
    addressForm.addCommand(okCommand);
    addressForm.addCommand(exitCommand);
    addressForm.setCommandListener(this);
    connectForm.append(messageLabel);
    connectForm.addCommand(backCommand);
    connectForm.setCommandListener(this);
    displayForm.append(messageLabel);
    displayForm.addCommand(backCommand);
    displayForm.setCommandListener(this);
    display.setCurrent(addressForm);
  }
  protected void pauseApp() {
  }
  protected void destroyApp(boolean unconditional)
      throws MIDletStateChangeException {
  }
  public void commandAction(Command cmd, Displayable d) {
    if (cmd == okCommand) {
      Thread t = new Thread(this);
      t.start();
      display.setCurrent(connectForm);
    } else if (cmd == backCommand) {
      display.setCurrent(addressForm);
    } else if (cmd == exitCommand) {
      try {
        destroyApp(true);
      } catch (MIDletStateChangeException ex) {
      }
      notifyDestroyed();
    }
  }
  public void run() {
    InputStream is = null;
    HttpConnection conn = null;
    try {
      String url = serverURL.getString();
      if (!url.startsWith("http://") && !url.startsWith("https://")) {
        url = "http://" + url;
      }
      conn = (HttpConnection) Connector.open(url, Connector.READ_WRITE);
      if (conn.getResponseCode() == HttpConnection.HTTP_OK) {
        is = conn.openInputStream();
        final int MAX_LENGTH = 128;
        byte[] buf = new byte[MAX_LENGTH];
        int total = 0;
        while (total < MAX_LENGTH) {
          int count = is.read(buf, total, MAX_LENGTH - total);
          if (count < 0) {
            break;
          }
          total += count;
        }
        is.close();
        String reply = new String(buf, 0, total);
        messageLabel.setText(reply);
      } else {
        messageLabel.setText("Failed: error " + conn.getResponseCode() + "\n"+ conn.getResponseMessage());
      }
      conn.close();
      display.setCurrent(displayForm);
    } catch (IOException ex) {
      System.out.println(ex);
      ex.printStackTrace();
      Alert alert = new Alert("I/O Error","An error occurred while communicating with the server.", null,AlertType.ERROR);
      alert.setTimeout(Alert.FOREVER);
      display.setCurrent(alert, addressForm);
      return;
    }
  }
}

HttpConnection: setRequestProperty(String key, String value) throws IOException

 

import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.midlet.MIDlet;
public class CookieMIDlet extends MIDlet implements CommandListener, Runnable {
  private Display mDisplay;
  private Form mForm;
  private String mSession;
  public void startApp() {
    mDisplay = Display.getDisplay(this);
    mForm = new Form("CookieMIDlet");
    mForm.addCommand(new Command("Exit", Command.EXIT, 0));
    mForm.addCommand(new Command("Send", Command.SCREEN, 0));
    mForm.setCommandListener(this);
 
    mDisplay.setCurrent(mForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c.getCommandType() == Command.EXIT)
      notifyDestroyed();
    else {
      Form waitForm = new Form("Connecting...");
      mDisplay.setCurrent(waitForm);
      Thread t = new Thread(this);
      t.start();
    }
  }
  public void run() {
    String url = getAppProperty("CookieMIDlet-URL");
    try {
      HttpConnection hc = (HttpConnection) Connector.open(url);
      if (mSession != null)
        hc.setRequestProperty("cookie", mSession);
      InputStream in = hc.openInputStream();
      String cookie = hc.getHeaderField("Set-cookie");
      if (cookie != null) {
        int semicolon = cookie.indexOf(";");
        mSession = cookie.substring(0, semicolon);
      }
      int length = (int) hc.getLength();
      byte[] raw = new byte[length];
      in.read(raw);
      String s = new String(raw);
      Alert a = new Alert("Response", s, null, null);
      a.setTimeout(Alert.FOREVER);
      mDisplay.setCurrent(a, mForm);
      in.close();
      hc.close();
    } catch (IOException ioe) {
      Alert a = new Alert("Exception", ioe.toString(), null, null);
      a.setTimeout(Alert.FOREVER);
      mDisplay.setCurrent(a, mForm);
    }
  }
}

InputConnection: openInputStream() throws IOException

 
import java.io.DataInputStream;
import java.io.IOException;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.rumand;
import javax.microedition.lcdui.rumandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
public class HttpGETMIDlet extends MIDlet implements CommandListener {
  private Command exitCommand = new Command("Exit", Command.EXIT, 1);
  private Command sendCommand = new Command("Send", Command.OK, 1);
  private Command backCommand = new Command("Upload", Command.OK, 1);
  private Display display;
  private String defaultURL = "http://localhost/JIDCA/hello.asp?name=JIDCA";
  private Form mainForm, resultForm;
  private TextField URL = new TextField(null, defaultURL, 250, TextField.URL);
  private StringItem resultItem;
  public HttpGETMIDlet() {
    display = Display.getDisplay(this);
  }
  public void startApp() {
    mainForm = new Form("Address");
    mainForm.append(URL);
    mainForm.addCommand(sendCommand);
    mainForm.addCommand(exitCommand);
    mainForm.setCommandListener(this);
    display.setCurrent(mainForm);
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
  public void commandAction(Command c, Displayable s) {
    if (c == sendCommand) {
      String result = "";
      resultItem = new StringItem(null, result);
      resultForm = new Form("Result");
      String URLString = URL.getString();
      try {
        result = requestUsingGET(URLString);
      } catch (IOException e) {
        result = "Falied";
      }
      resultItem.setText(result);
      resultForm.append(resultItem);
      resultForm.addCommand(backCommand);
      resultForm.setCommandListener(this);
      display.setCurrent(resultForm);
    } else if (c == backCommand) {
      URL.setString(defaultURL);
      display.setCurrent(mainForm);
    } else {
      destroyApp(false);
      notifyDestroyed();
    }
  }
  private String requestUsingGET(String URLString) throws IOException {
    HttpConnection hpc = null;
    DataInputStream dis = null;
    boolean newline = false;
    String content = "";
    try {
      hpc = (HttpConnection) Connector.open(URLString);
      dis = new DataInputStream(hpc.openInputStream());
      int character;
      while ((character = dis.read()) != -1) {
        if ((char) character == "\\") {
          newline = true;
          continue;
        } else {
          if ((char) character == "n" && newline) {
            content += "\n";
            newline = false;
          } else if (newline) {
            content += "\\" + (char) character;
            newline = false;
          } else {
            content += (char) character;
            newline = false;
          }
        }
      }
      if (hpc != null)
        hpc.close();
      if (dis != null)
        dis.close();
    } catch (IOException e2) {
    }
    return content;
  }
}