io.netty.handler.codec.http2

Class Http2DataChunkedInput

java.lang.Object

io.netty.handler.codec.http2.Http2DataChunkedInput

All Implemented Interfaces:

ChunkedInput<Http2DataFrame>

public final class Http2DataChunkedInput
extends Object
implements ChunkedInput<Http2DataFrame>

A ChunkedInput that fetches data chunk by chunk for use with HTTP/2 Data Frames.

Each chunk from the input data will be wrapped within a Http2DataFrame. At the end of the input data, Http2DataFrame.isEndStream() will be set to true and will be written.

     public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
         if (msg instanceof Http2HeadersFrame) {
             Http2HeadersFrame http2HeadersFrame = (Http2HeadersFrame) msg;

             Http2HeadersFrame response = new DefaultHttp2HeadersFrame(new DefaultHttp2Headers().status("200"));
             response.stream(http2HeadersFrame.stream());
             ctx.write(response);

             ChannelFuture sendFileFuture = ctx.writeAndFlush(new Http2DataChunkedInput(
                     new ChunkedFile(new File(("/home/meow/cats.mp4"))), http2HeadersFrame.stream()));
         }
     }
 

Constructor Summary

Constructors

Constructor and Description
Http2DataChunkedInput(ChunkedInput<ByteBuf> input, Http2FrameStream stream) Creates a new instance using the specified input.

Method Summary

Modifier and Type	Method and Description
void	close() Releases the resources associated with the input.
boolean	isEndOfInput() Return true if and only if there is no data left in the stream and the stream has reached at its end.
long	length() Returns the length of the input.
long	progress() Returns current transfer progress.
Http2DataFrame	readChunk(ByteBufAllocator allocator) Fetches a chunked data from the stream.
Http2DataFrame	readChunk(ChannelHandlerContext ctx) Deprecated.

Methods inherited from class java.lang.Object

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

Constructor Detail

Http2DataChunkedInput

public Http2DataChunkedInput(ChunkedInput<ByteBuf> input,
                             Http2FrameStream stream)

Creates a new instance using the specified input.

Parameters:

input - ChunkedInput containing data to write

stream - Http2FrameStream holding stream info

Method Detail

isEndOfInput

public boolean isEndOfInput()
                     throws Exception

Description copied from interface: ChunkedInput

Return true if and only if there is no data left in the stream and the stream has reached at its end.

Specified by:

isEndOfInput in interface ChunkedInput<Http2DataFrame>

Throws:

Exception

close

public void close()
           throws Exception

Description copied from interface: ChunkedInput

Releases the resources associated with the input.

Specified by:

close in interface ChunkedInput<Http2DataFrame>

Throws:

Exception

readChunk

@Deprecated
public Http2DataFrame readChunk(ChannelHandlerContext ctx)
                                     throws Exception

Deprecated.

Specified by:

readChunk in interface ChunkedInput<Http2DataFrame>

Parameters:

ctx - The context which provides a ByteBufAllocator if buffer allocation is necessary.

Returns:

the fetched chunk. null if there is no data left in the stream. Please note that null does not necessarily mean that the stream has reached at its end. In a slow stream, the next chunk might be unavailable just momentarily.

Throws:

Exception

readChunk

public Http2DataFrame readChunk(ByteBufAllocator allocator)
                         throws Exception

Description copied from interface: ChunkedInput

Fetches a chunked data from the stream. Once this method returns the last chunk and thus the stream has reached at its end, any subsequent ChunkedInput.isEndOfInput() call must return true.

Specified by:

readChunk in interface ChunkedInput<Http2DataFrame>

Parameters:

allocator - ByteBufAllocator if buffer allocation is necessary.

Returns:

the fetched chunk. null if there is no data left in the stream. Please note that null does not necessarily mean that the stream has reached at its end. In a slow stream, the next chunk might be unavailable just momentarily.

Throws:

Exception

length

public long length()

Description copied from interface: ChunkedInput

Returns the length of the input.

Specified by:

length in interface ChunkedInput<Http2DataFrame>

Returns:

the length of the input if the length of the input is known. a negative value if the length of the input is unknown.

progress

public long progress()

Description copied from interface: ChunkedInput

Returns current transfer progress.

Specified by:

progress in interface ChunkedInput<Http2DataFrame>