public class HttpStaticFileServerHandler extends SimpleChannelUpstreamHandler
'If-Modified-Since'
header to
take advantage of browser cache, as described in
RFC 2616.
/file1.txt
./file1.txt
is cached by the browser./file1.txt
does return the contents of the
file again. Rather, a 304 Not Modified is returned. This tells the
browser to use the contents stored in its cache.If-Modified-Since
date is the same as the file's last
modified date.Request #1 Headers =================== GET /file1.txt HTTP/1.1 Response #1 Headers =================== HTTP/1.1 200 OK Date: Tue, 01 Mar 2011 22:44:26 GMT Last-Modified: Wed, 30 Jun 2010 21:36:48 GMT Expires: Tue, 01 Mar 2012 22:44:26 GMT Cache-Control: private, max-age=31536000 Request #2 Headers =================== GET /file1.txt HTTP/1.1 If-Modified-Since: Wed, 30 Jun 2010 21:36:48 GMT Response #2 Headers =================== HTTP/1.1 304 Not Modified Date: Tue, 01 Mar 2011 22:44:28 GMT
ChannelHandler.Sharable
Modifier and Type | Field and Description |
---|---|
static int |
HTTP_CACHE_SECONDS |
static String |
HTTP_DATE_FORMAT |
static String |
HTTP_DATE_GMT_TIMEZONE |
Constructor and Description |
---|
HttpStaticFileServerHandler() |
Modifier and Type | Method and Description |
---|---|
void |
exceptionCaught(ChannelHandlerContext ctx,
ExceptionEvent e)
Invoked when an exception was raised by an I/O thread or a
ChannelHandler . |
void |
messageReceived(ChannelHandlerContext ctx,
MessageEvent e)
Invoked when a message object (e.g:
ChannelBuffer ) was received
from a remote peer. |
channelBound, channelClosed, channelConnected, channelDisconnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, handleUpstream, writeComplete
public static final String HTTP_DATE_FORMAT
public static final String HTTP_DATE_GMT_TIMEZONE
public static final int HTTP_CACHE_SECONDS
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception
SimpleChannelUpstreamHandler
ChannelBuffer
) was received
from a remote peer.messageReceived
in class SimpleChannelUpstreamHandler
Exception
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception
SimpleChannelUpstreamHandler
ChannelHandler
.exceptionCaught
in class SimpleChannelUpstreamHandler
Exception
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