HTTP POST-Method not supported by this URL.

Sep 14, 2005 02:54:00

Hi
I am using a simple html page whose contents will be submitted to a Servlet.
my html is

<FORM ACTION="/ServletLearning/servlet/a"
METHOD="POST">[ code]
I am only giving this part.
my servlet code is
[code] package j2src.test;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class a extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Reading All Request Parameters";
out.println(title +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<H1 ALIGN=CENTER>" + title + "</H1>\n" +
"<TABLE BORDER=1 ALIGN=CENTER>\n" +
"<TR BGCOLOR=\"#FFAD00\">\n" +
"<TH>Parameter Name<TH>Parameter Value(s)");
Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()) {
String paramName = (String)paramNames.nextElement();
out.print("<TR><TD>" + paramName + "\n<TD>");
String[] paramValues =
request.getParameterValues(paramName);
if (paramValues.length == 1)
{
String paramValue = paramValues[0];
if (paramValue.length() == 0)
out.println("<I>No Value</I>");
else
out.println(paramValue);
}
else
{
out.println("<UL>");
for(int i=0; i<paramValues.length; i++) {
out.println("><LI>" + paramValues[i]);
}
out.println("</UL>");
}
}
out.println("</TABLE>\n</BODY></HTML>");
}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

What could be the problem.In my web.xml I had configured like this
<servlet-mapping>
<servlet-name>a</servlet-name>
<url-pattern>/servlet/a</url-pattern>
</servlet-mapping>
<http-method>POST</http-method>

I am getting the error "HTTP POST-Method not supported by this URL.Can anyone help me in this?
Thanks and Regards
Satheesh.K

Sep 14, 2005 03:03:00

hv u tried the servlet with full package name
j2se.test.a???

Sep 14, 2005 03:10:00

Yes I did.

But Actually I need to submit the contents of the HTML form to the servlet.
I simply tried calling the servlet as <http://localhost:8080/ServletLearning/j2se.test.a>; also.
Now it is saying that the file is not found.But I have that class in <webapps\ServletLearning\WEB-INF\classes\j2src\test>.
Dont know what is the problem.
Can you please explain?
Thanks a log

Sep 14, 2005 03:38:00

Hi Satheesh,

<servlet-mapping>
<servlet-name>a</servlet-name>
<url-pattern>/servlet/a</url-pattern>
</servlet-mapping>

<http-method>POST</http-method>

Check whether there is a corresponding servlet definition present in web.xml.
for example:

<servlet>
<servlet-name>a</servlet-name>
<servlet-class>a</servlet-class>
</servlet>

I would suggest to change the servlet name to something else(except a .. coz it is the name of the servlet class..probably this shudn't be a pblm).
I tried the same code..it is working!!.

Ok now it is my turn..i have a small clarification in the above code itself..can any1 plz reply for this?.

<http-method>POST</http-method> <-- what is this?.

First of all, is this element valid if defined inside <webapp> element?.Should not it be enclosed inside <security-constraint> element?.Any comments?.

Regards,
Priya.

Sep 14, 2005 04:26:00

Hi Priya,
Yes I did.I forget to include here.
My Web.xml looks like this:

I tried once more restarting the server.But of no use.Will IE 6.0 support this Post functionality?

The <http-method>POST</http-method> as you told,should be included under
<security-constraint> </security-constraint> only.I just tried it here.It did not work before and after this inclusion.

Can you please suggest me some ways to make it work.Did you tried calling submitting from the HTML form.The example I took from Core servlets and JSP Pages book only.So I am really surprised as what could be wrong in this?
Please Explain.

Thanks and regards
Satheesh.K

Sep 14, 2005 05:01:00

Hey Satheesh,

Im also using IE6.0 only!!.No pblm in browser.If u r sure that ur web.xml looks like the one shown in ur above post..then where is the end tag for servlet element?!!

<servlet>
<servlet-name>a</servlet-name>
<servlet-class>j2src.test.a</servlet-class>
<servlet> <-- is this element missing in ur DD or u juz forgot to include here?.

<servlet-mapping>
<servlet-name>a</servlet-name>
<url-pattern>/servlet/a</url-pattern>
</servlet-mapping>

Try accessing the servlet itself directly.If this works obviously it should work when u submit ur HTML form also.I haven't tried using HTML.

Get back for further clarification if any!!

Regards,
Priya.

Sep 14, 2005 05:35:00

Hey Priya,

Sorry for disturbing you.Yes it is just a typo error.I have </servlet> tag in my web.xml

When I try to call the servlet directly,I am getting it.(ofcourse without any datas,only the table is coming.It is expected).The HTML has to send the datas to servlet to get it displayed.Hence only the Post is creating problem.
I will give my HTML here.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>A Sample FORM using POST</TITLE>
</HEAD>
<BODY BGCOLOR="#FDF5E6">
<H1 ALIGN="CENTER">A Sample FORM using POST</H1>
<FORM ACTION="/ServletLearning/servlet/a"
METHOD="POST">
Item Number: <INPUT TYPE="TEXT" NAME="itemNum"><BR>
Quantity: <INPUT TYPE="TEXT" NAME="quantity"><BR>
Price Each: <INPUT TYPE="TEXT" NAME="price" VALUE="$"><BR>
<HR>
First Name: <INPUT TYPE="TEXT" NAME="firstName"><BR>
Last Name: <INPUT TYPE="TEXT" NAME="lastName"><BR>
Middle Initial: <INPUT TYPE="TEXT" NAME="initial"><BR>
Shipping Address:
<TEXTAREA NAME="address" ROWS=3 COLS=40></TEXTAREA><BR>
Credit Card:<BR>
  <INPUT TYPE="RADIO" NAME="cardType"
VALUE="Visa">Visa<BR>
  <INPUT TYPE="RADIO" NAME="cardType"
VALUE="Master Card">Master Card<BR>
  <INPUT TYPE="RADIO" NAME="cardType"
VALUE="Amex">American Express<BR>
  <INPUT TYPE="RADIO" NAME="cardType"
VALUE="Discover">Discover<BR>
  <INPUT TYPE="RADIO" NAME="cardType"
VALUE="Java SmartCard">Java SmartCard<BR>
Credit Card Number:
<INPUT TYPE="PASSWORD" NAME="cardNum"><BR>
Repeat Credit Card Number:
<INPUT TYPE="PASSWORD" NAME="cardNum"><BR><BR>
<CENTER>
<INPUT TYPE="SUBMIT" VALUE="Submit Order">
</CENTER>
</FORM>
</BODY>
</HTML>

Sep 14, 2005 06:11:00

Now i got it whatz wrong with ur code..!!

Observe the following stmt in ur html

<FORM ACTION="/ServletLearning/servlet/a"METHOD="POST">

The above stmt should be changed to

<FORM ACTION="servlet/a" METHOD="POST">

Got it what i've done here?!."servlet/a" is ur actual url-mapping..then from where "ServletLearning" comes?!!

Make this small change & it'll work!!

Regards,
Priya.

Sep 14, 2005 06:32:00

<http-method></http-method> is declared within the

<web-resouce-collection></web-resource-collection> which in turn can be declared with <security-constraint></security-constraint> ....

The structure follows as:

<web-app ........>
<security-constraint>
<web-resouce-collection>
<web-resource-name>Resources</web-resource-name>
<url-pattern>/Beer/*</url-pattern>
<http-method>POST</http-method>
</web-resource-collection>
</security-constraint>
</web-app>

So, for simplicity, I would just recommend taking off the
<http-method>POST</http-method>
and see how it behaves...or just follow the standard .xml declarations....

Esam

Sep 14, 2005 07:33:00

Hi Priya,
Now I changed to
<FORM ACTION="/servlet/a" METHOD="POST">

Now I am getting HTTP 404 error.The requested resource is not available.

But when I try to invoke the servlet directly in IE

http://localhost:8080/ServletLearning/servlet/a

I am getting the HTML's(within the Servlet code) contents displayed.But not the datas which should come from HTML.

My War file name is ServletLearning.

As per ur suggestion when I click the button submit in the HTML,the URL formed is

http://localhost:8080/servlet/a

Hence I think some thing is wrong in this
Thanks and regards
Satheesh.K

Sep 14, 2005 21:56:00

Hi Satheesh,

<FORM ACTION="/servlet/a" METHOD="POST">

In the above stmt remove the slash before "servlet" in the action attribute.
it should be simply "servlet/a".After this as u said access the below url.

http://localhost:8080/ServletLearning/servlet/a

Regards,
Priya.

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