Sending Information to a Remote Site

• Just as it is easy to receive data from a server, it is also easy to send data to a server, or more likely, to a CGI script on a server.

• In this case, we will use an output and print stream instead of an input stream as in the following example.

  try
    {
    Socket s = new Socket("www.extropia.com", 
                           80);
    OutputStream os = s.getOutputStream());
    PrintStream ps = new PrintStream(os);
    ps.println("POST /cgi-bin/test.cgi");
    ps.println("Content-type: plain/text");
    String string = "Hello CGI Script!";
    ps.println("Content-length: " + 
               string.length + "\n");
    ps.println(string);
    }
  catch (IOException e)
    {
    System.out.println("Error: " + e);
    }
  

• Of course, you could simply use the GET method by passing the data as URL encoded information by replacing the first println line above with something more like:

  ps.println("GET /cgi-bin/test.cgi?phrase=Hello+CGI+Script");

Additional Resources:

• Learning to Write Java
• Introducing Java (TM) - Your First Applet
• Java FAQs
• Java Software
• java.sun.com
• Sun Microsystems

Getting Information from a Remote Site
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