doget(),doPost(),do Trace(),doOption()

[prathana balaji]

Hi all,
Please can anyone help me in understanding these methods of servlets,by giving any sample coding for all the methods.

Please..

Thanks in advance
Regards,
Prathana

[David O'Meara]

Nope, but there is some useful information here.

[prathana balaji]

Hi Thanks for the information,it is totally theoretical,I can very well understand the concepts,but I don't how to implement it.So I just want some example code/programs to under the implementation of the servlet methods.

Thanks & regards,
Prathana

[David O'Meara]

doGet()

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
    response.getWriter().write("This is the response to a doGet");
}

doPost()

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
    response.getWriter().write("This is the response to a doPost");
}

doTrace()

public void doTrace(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
    response.getWriter().write("This is the response to a doTrace");
}

The final example is left to the reader.

Seriously thought, each gets called and responds with information to the client. In theory they could all do the same thing, but in practice only Get and Post are really used, and what they return is a matter of best practice rather than anything else.

Dave

[David O'Meara]

If you would like more information on the difference between Get and Post, you should see the thread here

Dave

[prathana balaji]

Hi dave,

I tried the code which you have send for doTrace()
I am getting the below error in browser,can you please help me

HTTP Status 405 - HTTP method GET is not supported by this URL

--------------------------------------------------------------------------------

type Status report

message HTTP method GET is not supported by this URL

description The specified HTTP method is not allowed for the requested resource (HTTP method GET is not supported by this URL).


--------------------------------------------------------------------------------

Sun Java System Application Server Platform Edition 9.0_01

Regards,
Prathana

[Ulf Dittmer]

I tried the code which you have send for doTrace()
I am getting the below error in browser,can you please help me

HTTP Status 405 - HTTP method GET is not supported by this URL

If the servlet only implements doTrace then it can only be accessed using the HTTP TRACE method. That means you can't use an HTML link (which uses GET), and HTML form (which uses GET or POST) or type the address into the browser manually (which would use GET). You'll need to use an HTTP client library like Apache Commons HttpClient, or write some JavaScript code using XmlHttpRequest (which can generate all HTTP methods).