Can't read POST parameters in a Servlet

[Ivan Venuti <i....@caribel.pisa.it>]

Hi,

I have this problem: from an HTML page I call a Servlet via a form like this:

<form name="richiesta" method="post" action="servletName">

<input type="hidden" name="in_file" value="00009177.doc">

...

<input type="hidden" name="port" value="8787">

</form>

In the Servlet I retrieve the parameters with request.getParameter("paramName");

With Tomcat3.x everithing goes well, but with Tomcat 4.0.3 I can't retrieve the parameters in the Servlet: every getParameter returns "null", and printing all with

for (Enumeration namesList = request.getParameterNames(); namesList.hasMoreElements();)

{

String curName =(String)namesList.nextElement();

System.out.println("Param "+curName+" value: '"+request.getParameter(curName)+"'");

}

prints nothing!

I really can't figure out where to look for a solution. Any help is welcome!

-- Ivan Venuti --

Re: Can't read POST parameters in a Servlet

[David Brown <dw...@webitplanet.com>]

Ivan Venuti writes: 

> Hi, 
> 
> I have this problem: from an HTML page I call a Servlet via a form like this: 
> 
> <form name="richiesta" method="post" action="servletName"> 
> 
> <input type="hidden" name="in_file" value="00009177.doc"> 
> 
> ... 
> 
> <input type="hidden" name="port" value="8787"> 
> 
> </form> 
> 
> In the Servlet I retrieve the parameters with request.getParameter("paramName"); 
> 
> With Tomcat3.x everithing goes well, but with Tomcat 4.0.3 I can't retrieve the parameters in the Servlet: every getParameter returns "null", and printing all with 
> 
> for (Enumeration namesList = request.getParameterNames(); namesList.hasMoreElements();) 
> 
> { 
> 
> String curName =(String)namesList.nextElement(); 
> 
> System.out.println("Param "+curName+" value: '"+request.getParameter(curName)+"'"); 
> 
> } 
> 
> prints nothing! 
> 
> I really can't figure out where to look for a solution. Any help is welcome! 
> 
> -- Ivan Venuti -- 
> 
 

Hello Ivan, in the examples i think their is a servlet called the 
EchoServlet.java. this servlet simply prints the complete requests headers 
and parms for both get and post and other info (meta data etc.). u could try 
this a diagnostic tool. once the servlet is running all u have to do is 
temporarily put: http://localhost:8888 in ur form action to see the results. 
hope this helps, david. 


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