how to send an XML document to a server?

limrick · April 29th, 2005, 06:39 AM

Here's what i've been trying to achieve for about a week now:

I'm trying to develop a simple search engine the results of searches are stored in an xml repository the only way to access the server is through TCP/IP sockets it accepts an input (xml query) and returns another xml as output with the answers.

I have to create an xml document (using dom) based on the users search (done that)
then after that i should be able to send the XML file created to the server via TCP/IP sockets (i've partially completed this
basically my code opens an input and output stream and it works. However when i send a query as a string it just returns blank results, meaning the query is in the wrong format. I have to send the XML file.

Next, when i recieve the response from the server with the answers (assuming that the query is in the right format) i'll get back a list of answers in XML format. Now what i want is to display this in a html file so the user sees it.

Any help would be appreciated.

Code:

import java.net.*;
import java.io.*;
 
public class SendQuery {
 
  public static void main (String[] args) throws Exception
     {
 
    try {
        // Construct data
        String data = "<?xml version=\"1.0\"?>";
        data += "<query />";
        System.out.println(data);

        // Create a socket to the host
        String hostname = "testserver:313";
        int port = 313;
        InetAddress addr = InetAddress.getByName(hostname);
        Socket socket = new Socket(addr, port);

        // Send header
        String path = "/servlet/SomeServlet";
        BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8"));
        wr.write("hello");

        // Send data
        wr.write(data);
        wr.flush();

        // Get response
        BufferedReader rd = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        String line;
        while ((line = rd.readLine()) != null) {
            // Process line...
        }
        wr.close();
        rd.close();
    } catch (Exception e) {
    }

        try {
        // Create a URL for the desired page
        URL url = new URL("http://testserver:313");
 

        // Read all the text returned by the server
        BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
        String str;
        while ((str = in.readLine()) != null) {
            // str is one line of text; readLine() strips the newline character(s)
            System.out.println(str);
        }
        in.close();
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    }
}
}