HttpClientCodec (Netty API Reference (4.1.22.Final))

java.lang.Object
- io.netty.channel.ChannelHandlerAdapter
- - io.netty.channel.ChannelInboundHandlerAdapter
  - - io.netty.channel.ChannelDuplexHandler
    - - io.netty.channel.CombinedChannelDuplexHandler<HttpResponseDecoder,HttpRequestEncoder>
      - io.netty.handler.codec.http.HttpClientCodec

All Implemented Interfaces:

ChannelHandler ， ChannelInboundHandler ， ChannelOutboundHandler ， HttpClientUpgradeHandler.SourceCodec
```
public final class HttpClientCodec
extends CombinedChannelDuplexHandler<HttpResponseDecoder,HttpRequestEncoder>
implements HttpClientUpgradeHandler.SourceCodec
```
HttpRequestEncoder和HttpResponseDecoder的组合，使客户端HTTP实现更容易。 HttpClientCodec为HEAD和CONNECT请求提供了额外的状态管理，其中HttpResponseDecoder缺少。请参阅HttpResponseDecoder以了解HEAD和CONNECT需要进行哪些额外的状态管理，以及为什么HttpResponseDecoder无法自行处理。如果Channel已关闭并且没有响应，则会引发PrematureChannelClosureException 。

另请参见：

HttpServerCodec

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

构造方法摘要

构造方法
Constructor and Description
`HttpClientCodec()` 使用默认解码器选项（ `maxInitialLineLength (4096` }， `maxHeaderSize (8192)`和 `maxChunkSize (8192)` ）创建新实例。
`HttpClientCodec(int maxInitialLineLength, int maxHeaderSize, int maxChunkSize)` 用指定的解码器选项创建一个新实例。
`HttpClientCodec(int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean failOnMissingResponse)` 用指定的解码器选项创建一个新实例。
`HttpClientCodec(int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean failOnMissingResponse, boolean validateHeaders)` 用指定的解码器选项创建一个新实例。
`HttpClientCodec(int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean failOnMissingResponse, boolean validateHeaders, boolean parseHttpAfterConnectRequest)` 用指定的解码器选项创建一个新实例。
`HttpClientCodec(int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean failOnMissingResponse, boolean validateHeaders, int initialBufferSize)` 用指定的解码器选项创建一个新实例。
`HttpClientCodec(int maxInitialLineLength, int maxHeaderSize, int maxChunkSize, boolean failOnMissingResponse, boolean validateHeaders, int initialBufferSize, boolean parseHttpAfterConnectRequest)` 用指定的解码器选项创建一个新实例。

方法摘要

所有方法接口方法具体的方法
Modifier and Type	Method and Description
`boolean`	`isSingleDecode()`
`void`	`prepareUpgradeFrom(ChannelHandlerContext ctx)` 准备从HTTP升级到另一个协议。
`void`	`setSingleDecode(boolean singleDecode)`
`void`	`upgradeFrom(ChannelHandlerContext ctx)` 从HTTP升级到另一个协议。

Methods inherited from class io.netty.channel.CombinedChannelDuplexHandler
bind, channelActive, channelInactive, channelRead, channelReadComplete, channelRegistered, channelUnregistered, channelWritabilityChanged, close, connect, deregister, disconnect, exceptionCaught, flush, handlerAdded, handlerRemoved, inboundHandler, init, outboundHandler, read, removeInboundHandler, removeOutboundHandler, userEventTriggered, write

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

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

构造方法详细信息

HttpClientCodec
```
public HttpClientCodec()
```
使用默认解码器选项（ maxInitialLineLength (4096 }， maxHeaderSize (8192)和 maxChunkSize (8192) ）创建一个新实例。

HttpClientCodec

public HttpClientCodec(int maxInitialLineLength,
                       int maxHeaderSize,
                       int maxChunkSize)

用指定的解码器选项创建一个新实例。

HttpClientCodec

public HttpClientCodec(int maxInitialLineLength,
                       int maxHeaderSize,
                       int maxChunkSize,
                       boolean failOnMissingResponse)

用指定的解码器选项创建一个新实例。

HttpClientCodec

public HttpClientCodec(int maxInitialLineLength,
                       int maxHeaderSize,
                       int maxChunkSize,
                       boolean failOnMissingResponse,
                       boolean validateHeaders)

用指定的解码器选项创建一个新实例。

HttpClientCodec

public HttpClientCodec(int maxInitialLineLength,
                       int maxHeaderSize,
                       int maxChunkSize,
                       boolean failOnMissingResponse,
                       boolean validateHeaders,
                       boolean parseHttpAfterConnectRequest)

用指定的解码器选项创建一个新实例。

HttpClientCodec

public HttpClientCodec(int maxInitialLineLength,
                       int maxHeaderSize,
                       int maxChunkSize,
                       boolean failOnMissingResponse,
                       boolean validateHeaders,
                       int initialBufferSize)

用指定的解码器选项创建一个新实例。

HttpClientCodec

public HttpClientCodec(int maxInitialLineLength,
                       int maxHeaderSize,
                       int maxChunkSize,
                       boolean failOnMissingResponse,
                       boolean validateHeaders,
                       int initialBufferSize,
                       boolean parseHttpAfterConnectRequest)

用指定的解码器选项创建一个新实例。

方法详细信息
- prepareUpgradeFrom
```
public void prepareUpgradeFrom(ChannelHandlerContext ctx)
```
  准备从HTTP升级到另一个协议。禁用Encoder 。
  
  Specified by:
  
  prepareUpgradeFrom在界面 HttpClientUpgradeHandler.SourceCodec
- upgradeFrom
```
public void upgradeFrom(ChannelHandlerContext ctx)
```
  从HTTP升级到另一个协议。从管道中移除Decoder和Encoder 。
  
  Specified by:
  
  upgradeFrom在界面 HttpClientUpgradeHandler.SourceCodec
- setSingleDecode
```
public void setSingleDecode(boolean singleDecode)
```
- isSingleDecode
```
public boolean isSingleDecode()
```

Class HttpClientCodec

Nested Class Summary

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

构造方法摘要

方法摘要

Methods inherited from class io.netty.channel.CombinedChannelDuplexHandler

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

Methods inherited from class java.lang.Object

构造方法详细信息

HttpClientCodec

HttpClientCodec

HttpClientCodec

HttpClientCodec

HttpClientCodec

HttpClientCodec

HttpClientCodec

方法详细信息

prepareUpgradeFrom

upgradeFrom

setSingleDecode

isSingleDecode