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Using get() and post() together

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posted 21 years ago

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can i use get() and post() together so that the mechanism results in using get() for idempotent requests and post() for nonidempotent requests??

Manas<br />Today If You are not Confused,You are just not thinking Clearly !<br />---------------------------------

Bosun Bello

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posted 21 years ago

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I know you can have doGet() call doPost() and vice-versa. Not sure what you mean by indempotent and nonidempotent requests.

Bosun (SCJP, SCWCD).
So much trouble in the world -- Bob Marley

arif azim

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posted 21 years ago

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The GET operation is also expected to be idempotent, meaning that it can safely be repeated. This is not quite the same as being safe, but in some common examples the requirements have the same result. For example, repeating queries is both safe and idempotent (unless payment is required!), but buying something or modifying data is neither safe nor idempotent.

Pradeep bhatt

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posted 21 years ago

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ya, u can use doGet and doPost() methods together.
The service method calls the appropriate method based when the request method was get or post.

Groovy

Manas Ahlaad

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posted 21 years ago

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how does doget() call dopost() ??
what is the advantage of that??

Manas<br />Today If You are not Confused,You are just not thinking Clearly !<br />---------------------------------

Dorothy Finkel-Laverty

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posted 21 years ago

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I teach Java in a technical post-secondary school. We use a doPost that calls a doGet mostly for teaching purposes - that way, the students can use doGet and therefore, see the name/value pairs being passed to the server, and then, when they are ready for "production release", simply change their method to post. The doPost has one line of code in it - which calls the doGet and passes the appropriate request & response objects. Seeing the name/value pairs makes it easier for the beginning students to see what their program bugs might be.
I recommend it to them as a development tool, but tell them that they would normally change it to a post before installing the program.

Mike Curwen

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posted 21 years ago

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I love University students, they use big words.

http://www.dictionary.com/search?q=idempotent

Zkr Ryz

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posted 21 years ago

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Originally posted by manas ahlaad:
how does doget() call dopost() ??
what is the advantage of that??

public void doGet( HttpServletRequest request,
HttpServletResponse response )
{
doPost( request, response );
}

Val Pecaoco

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posted 21 years ago

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Hi guys,
I use Forte in my projects and here's a skeleton servlet code that Forte generates when you create a new servlet:

/*
 * TestServlet.java
 *
 * Created on April 23, 2002, 3:52 PM
 */
 
package com.foo.bar;           
import javax.servlet.*;
import javax.servlet.http.*;
/** 
 *
 * @author  *********
 * @version 
 */
public class TestServlet extends HttpServlet {
   
    /** Initializes the servlet.
    */  
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }
    /** Destroys the servlet.
    */  
    public void destroy() {
    }
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
    * @param request servlet request
    * @param response servlet response
    */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, java.io.IOException {
        response.setContentType("text/html");
        java.io.PrintWriter out = response.getWriter();
        /* output your page here
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Servlet</title>");  
        out.println("</head>");
        out.println("<body>");
        out.println("</body>");
        out.println("</html>");
        */
        out.close();
    } 
    /** Handles the HTTP <code>GET</code> method.
    * @param request servlet request
    * @param response servlet response
    */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, java.io.IOException {
        processRequest(request, response);
    } 
    /** Handles the HTTP <code>POST</code> method.
    * @param request servlet request
    * @param response servlet response
    */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, java.io.IOException {
        processRequest(request, response);
    }
    /** Returns a short description of the servlet.
    */
    public String getServletInfo() {
        return "Short description";
    }
}

I guess you notice that the method processRequest() is being called by both doGet() and doPost().
Ex Animo Java!
-- Val

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