io.netty.example.http.file

类 HttpStaticFileServerHandler

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.channel.SimpleChannelInboundHandler<FullHttpRequest>

io.netty.example.http.file.HttpStaticFileServerHandler

所有已实现的接口:

ChannelHandler, ChannelInboundHandler

public class HttpStaticFileServerHandler
extends SimpleChannelInboundHandler<FullHttpRequest>

A simple handler that serves incoming HTTP requests to send their respective HTTP responses. It also implements 'If-Modified-Since' header to take advantage of browser cache, as described in RFC 2616.

How Browser Caching Works

Web browser caching works with HTTP headers as illustrated by the following sample:

1. Request #1 returns the content of /file1.txt.
2. Contents of /file1.txt is cached by the browser.
3. Request #2 for /file1.txt does not 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.
4. The server knows the file has not been modified because the 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

 

嵌套类概要

从接口继承的嵌套类/接口 io.netty.channel.ChannelHandler

ChannelHandler.Sharable

字段概要

字段

限定符和类型	字段和说明
static int	HTTP_CACHE_SECONDS
static java.lang.String	HTTP_DATE_FORMAT
static java.lang.String	HTTP_DATE_GMT_TIMEZONE

构造器概要

构造器

构造器和说明
HttpStaticFileServerHandler()

方法概要

限定符和类型	方法和说明
void	channelRead0(ChannelHandlerContext ctx, FullHttpRequest request) Is called for each message of type I.
void	exceptionCaught(ChannelHandlerContext ctx, java.lang.Throwable cause) Calls ChannelHandlerContext.fireExceptionCaught(Throwable) to forward to the next ChannelHandler in the ChannelPipeline.

从类继承的方法 io.netty.channel.SimpleChannelInboundHandler

acceptInboundMessage, channelRead

从类继承的方法 io.netty.channel.ChannelInboundHandlerAdapter

channelActive, channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, userEventTriggered

从类继承的方法 io.netty.channel.ChannelHandlerAdapter

ensureNotSharable, handlerAdded, handlerRemoved, isSharable

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 io.netty.channel.ChannelHandler

handlerAdded, handlerRemoved

字段详细资料

HTTP_DATE_FORMAT

public static final java.lang.String HTTP_DATE_FORMAT

另请参阅:

常量字段值

HTTP_DATE_GMT_TIMEZONE

public static final java.lang.String HTTP_DATE_GMT_TIMEZONE

另请参阅:

常量字段值

HTTP_CACHE_SECONDS

public static final int HTTP_CACHE_SECONDS

另请参阅:

常量字段值

构造器详细资料

HttpStaticFileServerHandler

public HttpStaticFileServerHandler()

方法详细资料

channelRead0

public void channelRead0(ChannelHandlerContext ctx,
                         FullHttpRequest request)
                  throws java.lang.Exception

从类复制的说明: SimpleChannelInboundHandler

Is called for each message of type I.

指定者:

channelRead0 在类中 SimpleChannelInboundHandler<FullHttpRequest>

参数:

ctx - the ChannelHandlerContext which this SimpleChannelInboundHandler belongs to

request - the message to handle

抛出:

java.lang.Exception - is thrown if an error occurred

exceptionCaught

public void exceptionCaught(ChannelHandlerContext ctx,
                            java.lang.Throwable cause)

从类复制的说明: ChannelInboundHandlerAdapter

Calls ChannelHandlerContext.fireExceptionCaught(Throwable) to forward to the next ChannelHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.

指定者:

exceptionCaught 在接口中 ChannelHandler

指定者:

exceptionCaught 在接口中 ChannelInboundHandler

覆盖:

exceptionCaught 在类中 ChannelInboundHandlerAdapter