echoheaders.jws

《java网络编程精解》的源代码

/*
 *  The Apache Software License, Version 1.1
 *
 *  Copyright (c) 2002 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
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  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.
 *
 *  4. The names "The Jakarta Project", "Ant", and "Apache Software
 *  Foundation" must not be used to endorse or promote products derived
 *  from this software without prior written permission. For written
 *  permission, please contact [e-mail].
 *
 *  5. Products derived from this software may not be called "Apache"
 *  nor may "Apache" appear in their names without prior written
 *  permission of the Apache Group.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of the Apache Software Foundation.  For more
 *  information on the Apache Software Foundation, please see
 *  <http://www.apache.org/>.
 */

import org.apache.axis.AxisFault;
import org.apache.axis.MessageContext;
import org.apache.axis.transport.http.HTTPConstants;

import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;
import java.util.ArrayList;
import java.util.Iterator;

/**
 * class to list headers sent in request as a string array
 */
public class EchoHeaders {

    /**
     * demo message context stuff
     * @return list of request headers
     */
    public String[] list() {
        HttpServletRequest request = getRequest();
        Enumeration headers=request.getHeaderNames();
        ArrayList list=new ArrayList();
        while (headers.hasMoreElements()) {
            String h = (String) headers.nextElement();
            String header=h+':'+request.getHeader(h);
            list.add(header);
        }
        String[] results=new String[list.size()];
        for(int i=0;i<list.size();i++) {
            results[i]=(String) list.get(i);
        }
        return results;
    }

    /**
     * get the caller; may involve reverse DNS
     * @return
     */
    public String whoami() {
        HttpServletRequest request = getRequest();
        String remote=request.getRemoteHost();
        return "Hello caller from "+remote;
    }

    /**
     * very simple method to echo the param.
     * @param param
     * @return
     */
    public String echo(String param) {
        return param;
    }
    
    /**
     * throw an axis fault with the text included
     */
    public void throwAxisFault(String param) throws AxisFault {
        throw new AxisFault(param);
    }
    
    public void throwException(String param) throws Exception { 
        throw new Exception(param);
    }

    /**
     * thow a runtime exception
     */
    public void throwRuntimeException(String param) { 
        throw new RuntimeException(param);
    }
    
    /**
     * helper
     * @return
     */
    private HttpServletRequest getRequest() {
        MessageContext context = MessageContext.getCurrentContext();
        HttpServletRequest req = (HttpServletRequest) context.getProperty(HTTPConstants.MC_HTTP_SERVLETREQUEST);
        return req;
    }

}