HttpChunkedInput Class — netty Architecture

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/HttpChunkedInput.java lines 43–119

public class HttpChunkedInput implements ChunkedInput<HttpContent> {

    private final ChunkedInput<ByteBuf> input;
    private final LastHttpContent lastHttpContent;
    private boolean sentLastChunk;

    /**
     * Creates a new instance using the specified input.
     * @param input {@link ChunkedInput} containing data to write
     */
    public HttpChunkedInput(ChunkedInput<ByteBuf> input) {
        this.input = input;
        lastHttpContent = LastHttpContent.EMPTY_LAST_CONTENT;
    }

    /**
     * Creates a new instance using the specified input. {@code lastHttpContent} will be written as the terminating
     * chunk.
     * @param input {@link ChunkedInput} containing data to write
     * @param lastHttpContent {@link LastHttpContent} that will be written as the terminating chunk. Use this for
     *            training headers.
     */
    public HttpChunkedInput(ChunkedInput<ByteBuf> input, LastHttpContent lastHttpContent) {
        this.input = input;
        this.lastHttpContent = lastHttpContent;
    }

    @Override
    public boolean isEndOfInput() throws Exception {
        if (input.isEndOfInput()) {
            // Only end of input after last HTTP chunk has been sent
            return sentLastChunk;
        } else {
            return false;
        }
    }

    @Override
    public void close() throws Exception {
        input.close();
    }

    @Deprecated
    @Override
    public HttpContent readChunk(ChannelHandlerContext ctx) throws Exception {
        return readChunk(ctx.alloc());
    }

    @Override
    public HttpContent readChunk(ByteBufAllocator allocator) throws Exception {
        if (input.isEndOfInput()) {
            if (sentLastChunk) {
                return null;
            } else {
                // Send last chunk for this input
                sentLastChunk = true;
                return lastHttpContent;
            }
        } else {
            ByteBuf buf = input.readChunk(allocator);
            if (buf == null) {
                return null;
            }
            return new DefaultHttpContent(buf);
        }
    }

    @Override
    public long length() {
        return input.length();
    }

    @Override
    public long progress() {
        return input.progress();
    }
}