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From "Allistair Crossley" <Allistair.Cross...@QAS.com>
Subject RE: setting encoding scheme POST data via container
Date Tue, 14 Dec 2004 10:42:16 GMT
you would need to write a servlet filter and install it via web.xml (copied in). 

/*
 * $Header: /home/cvs/jakarta-tomcat-4.0/webapps/examples/WEB-INF/classes/filters/SetCharacterEncodingFilter.java,v
1.1 2001/07/24 00:26:55 craigmcc Exp $
 * $Revision: 1.1 $
 * $Date: 2001/07/24 00:26:55 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
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 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
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 *
 * 5. Products derived from this software may not be called "Apache"
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import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;


/**
 * Example filter that unconditionally sets the character encoding to be used
 * in parsing the incoming request to a value specified by the
 * <strong>encoding</string> filter initialization parameter in the web app
 * deployment descriptor (</code>/WEB-INF/web.xml</code>).  This filter could
 * easily be extended to be more intelligent about what character encoding to
 * set, based on characteristics of the incoming request (such as the values
 * of the <code>Accept-Language</code> and <code>User-Agent</code>
headers,
 * or a value stashed in the current user's session).
 *
 * @author Craig McClanahan
 * @version $Revision: 1.1 $ $Date: 2001/07/24 00:26:55 $
 */

public class SetCharacterEncodingFilter implements Filter {


    // ----------------------------------------------------- Instance Variables


    /**
     * The default character encoding to set for requests that pass through
     * this filter.
     */
    protected String encoding = null;


    /**
     * The filter configuration object we are associated with.  If this value
     * is null, this filter instance is not currently configured.
     */
    protected FilterConfig filterConfig = null;


    // --------------------------------------------------------- Public Methods


    /**
     * Take this filter out of service.
     */
    public void destroy() {

        this.encoding = null;
        this.filterConfig = null;

    }


    /**
     * Select and set (if specified) the character encoding to be used to
     * interpret request parameters for this request.
     *
     * @param request The servlet request we are processing
     * @param result The servlet response we are creating
     * @param chain The filter chain we are processing
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet error occurs
     */
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain)
	throws IOException, ServletException {

        // Select and set (if needed) the character encoding to be used
        String encoding = selectEncoding(request);
        if (encoding != null)
            request.setCharacterEncoding(encoding);

	// Pass control on to the next filter
        chain.doFilter(request, response);

    }


    /**
     * Place this filter into service.
     *
     * @param filterConfig The filter configuration object
     */
    public void init(FilterConfig filterConfig) throws ServletException {

	this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("encoding");

    }


    // ------------------------------------------------------ Protected Methods


    /**
     * Select an appropriate character encoding to be used, based on the
     * characteristics of the current request and/or filter initialization
     * parameters.  If no character encoding should be set, return
     * <code>null</code>.
     * <p>
     * The default implementation unconditionally returns the value configured
     * by the <strong>encoding</strong> initialization parameter for this
     * filter.
     *
     * @param request The servlet request we are processing
     */
    protected String selectEncoding(ServletRequest request) {

        return (this.encoding);

    }


}


> -----Original Message-----
> From: Quinten Verheyen [mailto:q.verheyen@ringring.be]
> Sent: 14 December 2004 10:34
> To: Tomcat Users List
> Subject: setting encoding scheme POST data via container
> 
> 
> Hi, is there a way to specify the encoding character scheme 
> used for form POST data on the container level ?
> 
> On a JSP level, this is done like this :
> 
> <FORM name="test" method="POST" 
> encType="application/x-www-form-urlencoded; charset=UTF-8" 
> accept-charset="UTF-8">..</FORM>
> 
> ps I use Tomcat 5.0.25 on Windows 2000 ..
> 
> Thx in advance,
> Q
> 
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> 


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