POST request encoding - Tomcat/JVM configuration?

Thu, 22 Oct 2009 01:41:35 -0700 


Hi,
I am running webapp for some time with no problems. After some 
"change" that I am not able to identify my POST (GET works fine) 
requests are messed up. Just on my local server.

Some facts: Tomcat 5.0.28, jdk 1.4.2.07 winXP, (others in,xp win server,linux)
Following simple code produces different result on my server and the others 
(web.xml,server.xml,jdk configuration is the same)

Form page:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; 
charset=UTF-8">
  <title>Encoding test</title>
 
  <script type="text/javascript">
  function test(method){
   var frm = document.getElementById("form");
   frm.method = method;
   frm.submit();
  }
  </script>
</head>

<body> 
 <form method='POST' action='post_process.jsp' id='form'>
  <input type='text' name='param'>
 </form> 

 <button onclick='test("get")'>get</button>
 <button onclick='test("post");'>post</button>
</body>
</html>

post_procces.jsp
<%@ page language="java" session="true" 
contentType="text/html; charset=UTF-8"%>
<% request.setCharacterEncoding("UTF-8");  %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
 <meta http-equiv="Content-Type" content="text/html; 
charset=UTF-8">
 <title>Encoding test process</title>
</head>
<body>

  <% String param   = request.getParameter("param");
     String decoded = new 
String(param.getBytes("iso-8859-1"),"UTF-8");
  
  System.out.println("Original value --> "+param);
  System.out.println("Decoded  value --> "+decoded);
  %>  
  
  V2<br>
  Method: <%= request.getMethod() %><br>
  Encoding: <%= request.getCharacterEncoding() %><br>
  Locale: <%= request.getLocale() %><br>
  Default System charset: <%= new java.io.OutputStreamWriter(new 
java.io.ByteArrayOutputStream()).getEncoding() %><br>
  Original value:  '<span style='color:<%= 
request.getMethod().equals("GET") ? "red" : 
"green" %>'><%= param %></span>'<br>
  Decoded  value: '<span style='color:<%= 
request.getMethod().equals("GET") ? "green" : 
"red" %>'><%= decoded %></span>'<br>
  </table>
</body>
</html>

My output:
Method: POST
Encoding: UTF-8
Locale: cs
Default System charset: Cp1250
Original value: 'čížek'
Decoded value: 'čížek'

Correct output (any other server):
V2
Method: POST
Encoding: UTF-8
Locale: cs
Default System charset: Cp1250
Original value: 'čížek'
Decoded value: '?�?ek'

I spent last two days googling and looking for answer with no luck. Hope that 
someone can help.

Thanks in advance
Jan Pfeifer

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