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1 files changed, 184 insertions, 0 deletions

diff --git a/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/WOResponse.java b/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/WOResponse.java
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+/*
+Wotonomy: OpenStep design patterns for pure Java applications.
+Copyright (C) 2000 Blacksmith, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, see http://www.gnu.org
+*/
+
+package net.wotonomy.web;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+
+import net.wotonomy.foundation.NSArray;
+
+/**
+* A pure java implementation of WOResponse.
+*
+* @author michael@mpowers.net
+* @author $Author: cgruber $
+* @version $Revision: 905 $
+*/
+public class WOResponse extends WOMessage
+    implements WOActionResults
+{
+	protected static String defaultEncoding;
+    private static SimpleDateFormat htmlDateFormat;
+    static
+    {
+        defaultEncoding = "ISO8859_1";
+        htmlDateFormat = new SimpleDateFormat(
+            "EEE, dd MMM yyyy HH:mm:ss z" );
+        htmlDateFormat.setTimeZone(
+            TimeZone.getTimeZone( "GMT" ) );
+    }
+
+	private int status;
+
+	/**
+	* Parameterless constructor which should not be called.
+	*/
+    public WOResponse ()
+    {
+		status = -1; // -1 indicates not yet set
+    }
+
+	/**
+	* Sets the status code of the response.
+	* You should use the constants defined in HttpServletResponse.
+	*/
+    public void setStatus (int code)
+    {
+    	status = code;
+    }
+
+	/**
+	* Gets the current status code for the response.
+	*/
+    public int status ()
+    {
+    	return status;
+    }
+
+	/**
+	* Sets a header in the response to disable client caching.
+	* (Whether this works depends on the client implementation.)
+	*/
+    public void disableClientCaching ()
+    {
+        String dateString = htmlDateFormat.format( new Date() );
+        setHeader( dateString, "Date" );
+        setHeader( dateString, "Expires" );
+        setHeader( "no-cache", "Pragma" );
+        setHeaders( new NSArray( new Object[] { 
+            "private", "no-cache", "max-age = 0" } ), "Cache-Control" );
+        //System.out.println( "disableClientCaching: " + dateString );        
+    }
+
+    /**
+    * Returns this object.  (Implements the WOActionResults interface.)
+    */
+    public WOResponse generateResponse()
+    {
+    	return this;
+    }
+
+	/**
+	* Generates the response using the specified servlet response,
+	* but does not flush the buffer. The caller is responsible
+	* for sending the response to the client.  <br><br>
+	* Note that this method is currently responsible for setting 
+	* the content type to "text/html".  As far as I can tell, WORequests
+	* have no way to set the content type and therefore must always
+	* be of type "text/html".
+	*/
+    void generateServletResponse 
+    	(javax.servlet.http.HttpServletResponse response)
+    {
+        if ( WOApplication.application().isPageRefreshOnBacktrackEnabled() )
+        {
+            disableClientCaching();
+        }
+
+	    String key;
+    	java.util.Enumeration e, f;
+	    
+	    // set content type: might be overwritten by headers below
+        response.setContentType( "text/html" );
+	    
+	    // set status
+	    if ( status != -1 )
+	    {
+	    	response.setStatus( status );	    
+		}
+
+	    // set headers
+	    f = _headers.allKeys().objectEnumerator();
+		while ( f.hasMoreElements() )
+		{
+            key = f.nextElement().toString();
+	    	e = ((NSArray)_headers.objectForKey( key )).objectEnumerator();
+	    	if ( e.hasMoreElements() )
+            {
+                // overwrite existing header
+                response.setHeader( key, e.nextElement().toString() );
+            }
+            while ( e.hasMoreElements() )
+            {
+                response.addHeader( key, e.nextElement().toString() );
+            }
+		}
+
+	    // set cookies
+	    e = _cookies.allValues().objectEnumerator();
+	    while ( e.hasMoreElements() )
+	    {
+	    	response.addCookie( (WOCookie) e.nextElement() );
+	    }
+
+		try
+		{
+            // write content
+            response.getOutputStream().write(_contentData.bytes() );
+            if ( status > 299 )
+            {
+                response.sendError( status );
+            }
+	    }
+	    catch ( Exception exc )
+		{
+			throw new RuntimeException( 
+				"Error writing response: " + exc );    	   
+		}
+    }
+
+
+	/**
+	* Returns the current default encoding seting.
+	*/
+    public static String defaultEncoding ()
+    {
+    	return defaultEncoding;
+    }
+
+	/**
+	* Sets the default encoding setting.
+	*/
+    public static void setDefaultEncoding (String encoding)
+    {
+    	defaultEncoding = encoding;
+    }
+
+}