Asp-applet communication(URGENT!!)

Question

hi,
i am facing a problem on asp-applet communication. i would like to ask how to pass applet parameters to asp page?my code below doesnt seem to work..
smsClient.java
public class smsClient {
private JOptionPane jOptionPanel = new JOptionPane();
private dialog dd;
String str;
public void executeSend(String smsno, String smsMessage,String user_id){
String qrysmsno=smsno;
String qrysmsMessage=smsMessage;
String qryUserId=user_id;
try{
String qry=URLEncoder.encode("smsno")+ "=" + URLEncoder.encode(qrysmsno) + "&";
qry= qry + URLEncoder.encode("smsMessage")+ "=" + URLEncoder.encode(qrysmsMessage);
//qry= qry + URLEncoder.encode("user_id")+ "=" + URLEncoder.encode(qryUserId);
URL url=new URL("http://172.20.34.116:8081/3dcommunity/sendsms.asp?"+qry);
dialog dd=new dialog();
//dd.showDialog(qry, "Alert!", JOptionPane.WARNING_MESSAGE);
          URLConnection uc = url.openConnection();
          uc.setDoOutput(true);
          uc.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
          PrintWriter pw = new PrintWriter(uc.getOutputStream());
          pw.println(str);
          pw.close();
          BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream()));
          String res = in.readLine();
          dd.showDialog(res, "Alert!", JOptionPane.WARNING_MESSAGE);
          in.close();
/*HttpURLConnection http = (HttpURLConnection)url.openConnection();
     http.setRequestMethod("GET");
     InputStream iStrm = null;
     if (http.getResponseCode() == HttpURLConnection.HTTP_OK) {
     iStrm = http.getInputStream();
     int length = (int) http.getContentLength();
     if (length > 0) {
     byte servletData[] = new byte[length];
     iStrm.read(servletData);
     String resultString = new String(servletData);
dd.showDialog(res, "Alert!", JOptionPane.WARNING_MESSAGE);
     iStrm.close();*/
     catch(MalformedURLException e){
     System.err.println(e);
dd.showDialog("MalformedURLException", "Alert!", JOptionPane.ERROR_MESSAGE);
     catch(IOException e){
     System.err.println(e);
dd.showDialog("IOException", "Alert!", JOptionPane.ERROR_MESSAGE);
sendsms.asp
<%
     set mySMS = Server.CreateObject("SCSMS.SMS")
     mySMS.Port = "COM3"
%>
<%
          mfg = mySMS.Manufacturer
          mdl = mySMS.Model
          if mySMS.Error then
               response.write mySMS.ErrorMsg
          else
               response.write "Manufacturer : " & mfg & "<br>"
               response.write "Model : " & mdl & "<br><br>"
          end if
          smsno=request.queryString("smsno")
          smsMessage=request.queryString("smsMessage")
     mySMS.sendsms smsno, smsMessage
     if mySMS.Error <> 0 then
          'response.write "Failed" & mySMS.ErrorMsg
     else
          response.write "Success"
     end if
%>

Answer 1

use the following class for applet to any web site connection (it can be asp, jsp, cgi etc)
package com.oreilly.servlet;
import java.io.*;
import java.net.*;
import java.util.*;
* A class to simplify HTTP applet-server communication. It abstracts
* the communication into messages, which can be either GET or POST.
* <p>
* It can be used like this:
* <blockquote><pre>
* URL url = new URL(getCodeBase(), "/servlet/ServletName");
* HttpMessage msg = new HttpMessage(url);
* // Parameters may optionally be set using java.util.Properties
* Properties props = new Properties();
* props.put("name", "value");
* // Headers, cookies, and authorization may be set as well
* msg.setHeader("Accept", "image/png"); // optional
* msg.setCookie("JSESSIONID", "9585155923883872"); // optional
* msg.setAuthorization("guest", "try2gueSS"); // optional
* InputStream in = msg.sendGetMessage(props);
* </pre></blockquote>
* <p>
* This class is loosely modeled after the ServletMessage class written
* by Rod McChesney of JavaSoft.
* @author <b>Jason Hunter</b>, Copyright &#169; 1998
* @version 1.3, 2000/10/24, fixed headers NPE bug
* @version 1.2, 2000/10/15, changed uploaded object MIME type to
* application/x-java-serialized-object
* @version 1.1, 2000/06/11, added ability to set headers, cookies,
and authorization
* @version 1.0, 1998/09/18
public class HttpMessage {
URL servlet = null;
Hashtable headers = null;
* Constructs a new HttpMessage that can be used to communicate with the
* servlet at the specified URL.
* @param servlet the server resource (typically a servlet) with which
* to communicate
public HttpMessage(URL servlet) {
this.servlet = servlet;
* Performs a GET request to the servlet, with no query string.
* @return an InputStream to read the response
* @exception IOException if an I/O error occurs
public InputStream sendGetMessage() throws IOException {
return sendGetMessage(null);
* Performs a GET request to the servlet, building
* a query string from the supplied properties list.
* @param args the properties list from which to build a query string
* @return an InputStream to read the response
* @exception IOException if an I/O error occurs
public InputStream sendGetMessage(Properties args) throws IOException {
String argString = ""; // default
if (args != null) {
argString = "?" + toEncodedString(args);
URL url = new URL(servlet.toExternalForm() + argString);
// Turn off caching
URLConnection con = url.openConnection();
con.setUseCaches(false);
// Send headers
sendHeaders(con);
return con.getInputStream();
* Performs a POST request to the servlet, with no query string.
* @return an InputStream to read the response
* @exception IOException if an I/O error occurs
public InputStream sendPostMessage() throws IOException {
return sendPostMessage(null);
* Performs a POST request to the servlet, building
* post data from the supplied properties list.
* @param args the properties list from which to build the post data
* @return an InputStream to read the response
* @exception IOException if an I/O error occurs
public InputStream sendPostMessage(Properties args) throws IOException {
String argString = ""; // default
if (args != null) {
argString = toEncodedString(args); // notice no "?"
URLConnection con = servlet.openConnection();
// Prepare for both input and output
con.setDoInput(true);
con.setDoOutput(true);
// Turn off caching
con.setUseCaches(false);
// Work around a Netscape bug
con.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
// Send headers
sendHeaders(con);
// Write the arguments as post data
DataOutputStream out = new DataOutputStream(con.getOutputStream());
out.writeBytes(argString);
out.flush();
out.close();
return con.getInputStream();
* Performs a POST request to the servlet, uploading a serialized object.
* <p>
* The servlet can receive the object in its <tt>doPost()</tt> method
* like this:
* <pre>
* ObjectInputStream objin =
* new ObjectInputStream(req.getInputStream());
* Object obj = objin.readObject();
* </pre>
* The type of the uploaded object can be determined through introspection.
* @param obj the serializable object to upload
* @return an InputStream to read the response
* @exception IOException if an I/O error occurs
public InputStream sendPostMessage(Serializable obj) throws IOException {
URLConnection con = servlet.openConnection();
// Prepare for both input and output
con.setDoInput(true);
con.setDoOutput(true);
// Turn off caching
con.setUseCaches(false);
// Set the content type to be application/x-java-serialized-object
con.setRequestProperty("Content-Type",
"application/x-java-serialized-object");
// Send headers
sendHeaders(con);
// Write the serialized object as post data
ObjectOutputStream out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(obj);
out.flush();
out.close();
return con.getInputStream();
* Sets a request header with the given name and value. The header
* persists across multiple requests. The caller is responsible for
* ensuring there are no illegal characters in the name and value.
* @param name the header name
* @param value the header value
public void setHeader(String name, String value) {
if (headers == null) {
headers = new Hashtable();
headers.put(name, value);
// Send the contents of the headers hashtable to the server
private void sendHeaders(URLConnection con) {
if (headers != null) {
Enumeration enum = headers.keys();
while (enum.hasMoreElements()) {
String name = (String) enum.nextElement();
String value = (String) headers.get(name);
con.setRequestProperty(name, value);
* Sets a request cookie with the given name and value. The cookie
* persists across multiple requests. The caller is responsible for
* ensuring there are no illegal characters in the name and value.
* @param name the header name
* @param value the header value
public void setCookie(String name, String value) {
if (headers == null) {
headers = new Hashtable();
String existingCookies = (String) headers.get("Cookie");
if (existingCookies == null) {
setHeader("Cookie", name + "=" + value);
else {
setHeader("Cookie", existingCookies + "; " + name + "=" + value);
* Sets the authorization information for the request (using BASIC
* authentication via the HTTP Authorization header). The authorization
* persists across multiple requests.
* @param name the user name
* @param name the user password
public void setAuthorization(String name, String password) {
String authorization = Base64Encoder.encode(name + ":" + password);
setHeader("Authorization", "Basic " + authorization);
* Converts a properties list to a URL-encoded query string
private String toEncodedString(Properties args) {
StringBuffer buf = new StringBuffer();
Enumeration names = args.propertyNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
String value = args.getProperty(name);
buf.append(URLEncoder.encode(name) + "=" + URLEncoder.encode(value));
if (names.hasMoreElements()) buf.append("&");
return buf.toString();
}