DefaultHttp2FrameWriter (Netty API Reference (4.1.115.Final))

java.lang.Object
- io.netty.handler.codec.http2.DefaultHttp2FrameWriter

All Implemented Interfaces:

Http2DataWriter, Http2FrameSizePolicy, Http2FrameWriter, Http2FrameWriter.Configuration, Closeable, AutoCloseable
```
public class DefaultHttp2FrameWriter
extends Object
implements Http2FrameWriter, Http2FrameSizePolicy, Http2FrameWriter.Configuration
```
A Http2FrameWriter that supports all frame types defined by the HTTP/2 specification.

Nested Class Summary
- Nested classes/interfaces inherited from interface io.netty.handler.codec.http2.Http2FrameWriter
  Http2FrameWriter.Configuration

Constructor Summary

Constructors
Constructor and Description
`DefaultHttp2FrameWriter()`
`DefaultHttp2FrameWriter(Http2HeadersEncoder.SensitivityDetector headersSensitivityDetector)`
`DefaultHttp2FrameWriter(Http2HeadersEncoder.SensitivityDetector headersSensitivityDetector, boolean ignoreMaxHeaderListSize)`
`DefaultHttp2FrameWriter(Http2HeadersEncoder headersEncoder)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close()` Closes this writer and frees any allocated resources.
`Http2FrameWriter.Configuration`	`configuration()` Get the configuration related elements for this `Http2FrameWriter`
`Http2FrameSizePolicy`	`frameSizePolicy()` Get the `Http2FrameSizePolicy` for this `Http2FrameWriter`
`Http2HeadersEncoder.Configuration`	`headersConfiguration()` Get the `Http2HeadersEncoder.Configuration` for this `Http2FrameWriter`
`int`	`maxFrameSize()` Gets the maximum allowed frame size.
`void`	`maxFrameSize(int max)` Sets the maximum allowed frame size.
`ChannelFuture`	`writeData(ChannelHandlerContext ctx, int streamId, ByteBuf data, int padding, boolean endStream, ChannelPromise promise)` Writes a `DATA` frame to the remote endpoint.
`ChannelFuture`	`writeFrame(ChannelHandlerContext ctx, byte frameType, int streamId, Http2Flags flags, ByteBuf payload, ChannelPromise promise)` Generic write method for any HTTP/2 frame.
`ChannelFuture`	`writeGoAway(ChannelHandlerContext ctx, int lastStreamId, long errorCode, ByteBuf debugData, ChannelPromise promise)` Writes a GO_AWAY frame to the remote endpoint.
`ChannelFuture`	`writeHeaders(ChannelHandlerContext ctx, int streamId, Http2Headers headers, int padding, boolean endStream, ChannelPromise promise)` Writes a HEADERS frame to the remote endpoint.
`ChannelFuture`	`writeHeaders(ChannelHandlerContext ctx, int streamId, Http2Headers headers, int streamDependency, short weight, boolean exclusive, int padding, boolean endStream, ChannelPromise promise)` Writes a HEADERS frame with priority specified to the remote endpoint.
`ChannelFuture`	`writePing(ChannelHandlerContext ctx, boolean ack, long data, ChannelPromise promise)` Writes a PING frame to the remote endpoint.
`ChannelFuture`	`writePriority(ChannelHandlerContext ctx, int streamId, int streamDependency, short weight, boolean exclusive, ChannelPromise promise)` Writes a PRIORITY frame to the remote endpoint.
`ChannelFuture`	`writePushPromise(ChannelHandlerContext ctx, int streamId, int promisedStreamId, Http2Headers headers, int padding, ChannelPromise promise)` Writes a PUSH_PROMISE frame to the remote endpoint.
`ChannelFuture`	`writeRstStream(ChannelHandlerContext ctx, int streamId, long errorCode, ChannelPromise promise)` Writes a RST_STREAM frame to the remote endpoint.
`ChannelFuture`	`writeSettings(ChannelHandlerContext ctx, Http2Settings settings, ChannelPromise promise)` Writes a SETTINGS frame to the remote endpoint.
`ChannelFuture`	`writeSettingsAck(ChannelHandlerContext ctx, ChannelPromise promise)` Writes a SETTINGS acknowledgment to the remote endpoint.
`ChannelFuture`	`writeWindowUpdate(ChannelHandlerContext ctx, int streamId, int windowSizeIncrement, ChannelPromise promise)` Writes a WINDOW_UPDATE frame to the remote endpoint.

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

- Constructor Detail
  - DefaultHttp2FrameWriter
```
public DefaultHttp2FrameWriter()
```
  - DefaultHttp2FrameWriter
```
public DefaultHttp2FrameWriter(Http2HeadersEncoder.SensitivityDetector headersSensitivityDetector)
```
  - DefaultHttp2FrameWriter
```
public DefaultHttp2FrameWriter(Http2HeadersEncoder.SensitivityDetector headersSensitivityDetector,
                               boolean ignoreMaxHeaderListSize)
```
  - DefaultHttp2FrameWriter
```
public DefaultHttp2FrameWriter(Http2HeadersEncoder headersEncoder)
```
    Parameters:
    
    headersEncoder - will be closed if it implements Closeable
- Method Detail
  - configuration
```
public Http2FrameWriter.Configuration configuration()
```
    Description copied from interface: Http2FrameWriter
    
    Get the configuration related elements for this Http2FrameWriter
    
    Specified by:
    
    configuration in interface Http2FrameWriter
  - headersConfiguration
```
public Http2HeadersEncoder.Configuration headersConfiguration()
```
    Description copied from interface: Http2FrameWriter.Configuration
    
    Get the Http2HeadersEncoder.Configuration for this Http2FrameWriter
    
    Specified by:
    
    headersConfiguration in interface Http2FrameWriter.Configuration
  - frameSizePolicy
```
public Http2FrameSizePolicy frameSizePolicy()
```
    Description copied from interface: Http2FrameWriter.Configuration
    
    Get the Http2FrameSizePolicy for this Http2FrameWriter
    
    Specified by:
    
    frameSizePolicy in interface Http2FrameWriter.Configuration
  - maxFrameSize
```
public void maxFrameSize(int max)
                  throws Http2Exception
```
    Description copied from interface: Http2FrameSizePolicy
    
    Sets the maximum allowed frame size. Attempts to write frames longer than this maximum will fail.
    This value is used to represent SETTINGS_MAX_FRAME_SIZE. This method should only be called by Netty (not users) as a result of a receiving a SETTINGS frame.
    
    Specified by:
    
    maxFrameSize in interface Http2FrameSizePolicy
    
    Throws:
    
    Http2Exception
  - maxFrameSize
```
public int maxFrameSize()
```
    Description copied from interface: Http2FrameSizePolicy
    
    Gets the maximum allowed frame size.
    This value is used to represent SETTINGS_MAX_FRAME_SIZE. The initial value defined by the RFC is unlimited but enforcing a lower limit is generally permitted. Http2CodecUtil.DEFAULT_MAX_FRAME_SIZE can be used as a more conservative default.
    
    Specified by:
    
    maxFrameSize in interface Http2FrameSizePolicy
  - close
```
public void close()
```
    Description copied from interface: Http2FrameWriter
    
    Closes this writer and frees any allocated resources.
    
    Specified by:
    
    close in interface Http2FrameWriter
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
  - writeData
```
public ChannelFuture writeData(ChannelHandlerContext ctx,
                               int streamId,
                               ByteBuf data,
                               int padding,
                               boolean endStream,
                               ChannelPromise promise)
```
    Description copied from interface: Http2DataWriter
    
    Writes a DATA frame to the remote endpoint. This will result in one or more frames being written to the context.
    
    Specified by:
    
    writeData in interface Http2DataWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    data - the payload of the frame. This will be released by this method.
    
    padding - additional bytes that should be added to obscure the true content size. Must be between 0 and 256 (inclusive). A 1 byte padding is encoded as just the pad length field with value 0. A 256 byte padding is encoded as the pad length field with value 255 and 255 padding bytes appended to the end of the frame.
    
    endStream - indicates if this is the last frame to be sent for the stream.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writeHeaders
```
public ChannelFuture writeHeaders(ChannelHandlerContext ctx,
                                  int streamId,
                                  Http2Headers headers,
                                  int padding,
                                  boolean endStream,
                                  ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a HEADERS frame to the remote endpoint.
    Specified by:
    
    writeHeaders in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    headers - the headers to be sent.
    
    padding - additional bytes that should be added to obscure the true content size. Must be between 0 and 256 (inclusive).
    
    endStream - indicates if this is the last frame to be sent for the stream.
    
    promise - the promise for the write.
    
    Returns:
    the future for the write. Section 10.5.1 states the following:
    The header block MUST be processed to ensure a consistent connection state, unless the connection is closed.
    If this call has modified the HPACK header state you MUST throw a connection error.
    If this call has NOT modified the HPACK header state you are free to throw a stream error.
  - writeHeaders
```
public ChannelFuture writeHeaders(ChannelHandlerContext ctx,
                                  int streamId,
                                  Http2Headers headers,
                                  int streamDependency,
                                  short weight,
                                  boolean exclusive,
                                  int padding,
                                  boolean endStream,
                                  ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a HEADERS frame with priority specified to the remote endpoint.
    Specified by:
    
    writeHeaders in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    headers - the headers to be sent.
    
    streamDependency - the stream on which this stream should depend, or 0 if it should depend on the connection.
    
    weight - the weight for this stream.
    
    exclusive - whether this stream should be the exclusive dependant of its parent.
    
    padding - additional bytes that should be added to obscure the true content size. Must be between 0 and 256 (inclusive).
    
    endStream - indicates if this is the last frame to be sent for the stream.
    
    promise - the promise for the write.
    
    Returns:
    the future for the write. Section 10.5.1 states the following:
    The header block MUST be processed to ensure a consistent connection state, unless the connection is closed.
    If this call has modified the HPACK header state you MUST throw a connection error.
    If this call has NOT modified the HPACK header state you are free to throw a stream error.
  - writePriority
```
public ChannelFuture writePriority(ChannelHandlerContext ctx,
                                   int streamId,
                                   int streamDependency,
                                   short weight,
                                   boolean exclusive,
                                   ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a PRIORITY frame to the remote endpoint.
    
    Specified by:
    
    writePriority in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    streamDependency - the stream on which this stream should depend, or 0 if it should depend on the connection.
    
    weight - the weight for this stream.
    
    exclusive - whether this stream should be the exclusive dependant of its parent.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writeRstStream
```
public ChannelFuture writeRstStream(ChannelHandlerContext ctx,
                                    int streamId,
                                    long errorCode,
                                    ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a RST_STREAM frame to the remote endpoint.
    
    Specified by:
    
    writeRstStream in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    errorCode - the error code indicating the nature of the failure.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writeSettings
```
public ChannelFuture writeSettings(ChannelHandlerContext ctx,
                                   Http2Settings settings,
                                   ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a SETTINGS frame to the remote endpoint.
    
    Specified by:
    
    writeSettings in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    settings - the settings to be sent.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writeSettingsAck
```
public ChannelFuture writeSettingsAck(ChannelHandlerContext ctx,
                                      ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a SETTINGS acknowledgment to the remote endpoint.
    
    Specified by:
    
    writeSettingsAck in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writePing
```
public ChannelFuture writePing(ChannelHandlerContext ctx,
                               boolean ack,
                               long data,
                               ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a PING frame to the remote endpoint.
    
    Specified by:
    
    writePing in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    ack - indicates whether this is an ack of a PING frame previously received from the remote endpoint.
    
    data - the payload of the frame.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writePushPromise
```
public ChannelFuture writePushPromise(ChannelHandlerContext ctx,
                                      int streamId,
                                      int promisedStreamId,
                                      Http2Headers headers,
                                      int padding,
                                      ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a PUSH_PROMISE frame to the remote endpoint.
    Specified by:
    
    writePushPromise in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    promisedStreamId - the ID of the promised stream.
    
    headers - the headers to be sent.
    
    padding - additional bytes that should be added to obscure the true content size. Must be between 0 and 256 (inclusive).
    
    promise - the promise for the write.
    
    Returns:
    the future for the write. Section 10.5.1 states the following:
    The header block MUST be processed to ensure a consistent connection state, unless the connection is closed.
    If this call has modified the HPACK header state you MUST throw a connection error.
    If this call has NOT modified the HPACK header state you are free to throw a stream error.
  - writeGoAway
```
public ChannelFuture writeGoAway(ChannelHandlerContext ctx,
                                 int lastStreamId,
                                 long errorCode,
                                 ByteBuf debugData,
                                 ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a GO_AWAY frame to the remote endpoint.
    
    Specified by:
    
    writeGoAway in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    lastStreamId - the last known stream of this endpoint.
    
    errorCode - the error code, if the connection was abnormally terminated.
    
    debugData - application-defined debug data. This will be released by this method.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writeWindowUpdate
```
public ChannelFuture writeWindowUpdate(ChannelHandlerContext ctx,
                                       int streamId,
                                       int windowSizeIncrement,
                                       ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Writes a WINDOW_UPDATE frame to the remote endpoint.
    
    Specified by:
    
    writeWindowUpdate in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    streamId - the stream for which to send the frame.
    
    windowSizeIncrement - the number of bytes by which the local inbound flow control window is increasing.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.
  - writeFrame
```
public ChannelFuture writeFrame(ChannelHandlerContext ctx,
                                byte frameType,
                                int streamId,
                                Http2Flags flags,
                                ByteBuf payload,
                                ChannelPromise promise)
```
    Description copied from interface: Http2FrameWriter
    
    Generic write method for any HTTP/2 frame. This allows writing of non-standard frames.
    
    Specified by:
    
    writeFrame in interface Http2FrameWriter
    
    Parameters:
    
    ctx - the context to use for writing.
    
    frameType - the frame type identifier.
    
    streamId - the stream for which to send the frame.
    
    flags - the flags to write for this frame.
    
    payload - the payload to write for this frame. This will be released by this method.
    
    promise - the promise for the write.
    
    Returns:
    
    the future for the write.

Class DefaultHttp2FrameWriter

Nested Class Summary

Nested classes/interfaces inherited from interface io.netty.handler.codec.http2.Http2FrameWriter

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DefaultHttp2FrameWriter

DefaultHttp2FrameWriter

DefaultHttp2FrameWriter

DefaultHttp2FrameWriter

Method Detail

configuration

headersConfiguration

frameSizePolicy

maxFrameSize

maxFrameSize

close

writeData

writeHeaders

writeHeaders

writePriority

writeRstStream

writeSettings

writeSettingsAck

writePing

writePushPromise

writeGoAway

writeWindowUpdate

writeFrame