HttpServerExpectContinueHandler (Netty API Reference (4.2.1.Final))

java.lang.Object
- io.netty.channel.ChannelHandlerAdapter
- - io.netty.channel.ChannelInboundHandlerAdapter
  - - io.netty.handler.codec.http.HttpServerExpectContinueHandler

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler
```
public class HttpServerExpectContinueHandler
extends ChannelInboundHandlerAdapter
```
Sends a 100 CONTINUE HttpResponse to HttpRequests which contain a 'expect: 100-continue' header. It should only be used for applications which do not install the HttpObjectAggregator.
By default it accepts all expectations.
Since HttpServerExpectContinueHandler expects HttpRequests it should be added after HttpServerCodec but before any other handlers that might send a HttpResponse.
```
  ChannelPipeline p = ...;
  ...
  p.addLast("serverCodec", new HttpServerCodec());
  p.addLast("respondExpectContinue", new HttpServerExpectContinueHandler());
  ...
  p.addLast("handler", new HttpRequestHandler());
  
```

Nested Class Summary
- Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler
  ChannelHandler.Sharable

Constructor Summary

Constructors
Constructor Description

HttpServerExpectContinueHandler()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected HttpResponse`	`acceptMessage(HttpRequest request)`	Produces a `HttpResponse` for `HttpRequest`s which define an expectation.
`void`	`channelRead(ChannelHandlerContext ctx, java.lang.Object msg)`	Calls `ChannelHandlerContext.fireChannelRead(Object)` to forward to the next `ChannelInboundHandler` in the `ChannelPipeline`.
`protected HttpResponse`	`rejectResponse(HttpRequest request)`	Returns the appropriate 4XX `HttpResponse` for the given `HttpRequest`.

Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter
channelActive, channelInactive, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught, userEventTriggered

Methods inherited from class io.netty.channel.ChannelHandlerAdapter
ensureNotSharable, handlerAdded, handlerRemoved, isSharable

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.netty.channel.ChannelHandler
handlerAdded, handlerRemoved

- Constructor Detail
  - HttpServerExpectContinueHandler
```
public HttpServerExpectContinueHandler()
```
- Method Detail
  - acceptMessage
```
protected HttpResponse acceptMessage(HttpRequest request)
```
    Produces a HttpResponse for HttpRequests which define an expectation. Returns null if the request should be rejected. See rejectResponse(HttpRequest).
  - rejectResponse
```
protected HttpResponse rejectResponse(HttpRequest request)
```
    Returns the appropriate 4XX HttpResponse for the given HttpRequest.
  - channelRead
```
public void channelRead(ChannelHandlerContext ctx,
                        java.lang.Object msg)
                 throws java.lang.Exception
```
    Description copied from class: ChannelInboundHandlerAdapter
    
    Calls ChannelHandlerContext.fireChannelRead(Object) to forward to the next ChannelInboundHandler in the ChannelPipeline. Sub-classes may override this method to change behavior.
    
    Specified by:
    
    channelRead in interface ChannelInboundHandler
    
    Overrides:
    
    channelRead in class ChannelInboundHandlerAdapter
    
    Throws:
    
    java.lang.Exception