Package io.undertow.server.protocol.framed

Examples of io.undertow.server.protocol.framed.SendFrameHeader


            header.put((byte)((maskingKey >> 16) & 0xFF));
            header.put((byte)((maskingKey >> 8) & 0xFF));
            header.put((byte)((maskingKey & 0xFF)));
        }
        header.flip();
        return new SendFrameHeader(0, start);
    }
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        }
    }

    @Override
    protected final SendFrameHeader createFrameHeader() {
        SendFrameHeader header = this.header;
        this.header = null;
        return header;
    }
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    @Override
    public boolean insertFrame(SpdyStreamSinkChannel newFrame, List<SpdyStreamSinkChannel> pendingFrames) {
        //first deal with flow control
        if(newFrame instanceof SpdyStreamStreamSinkChannel) {
            SendFrameHeader header = ((SpdyStreamStreamSinkChannel) newFrame).generateSendFrameHeader();
            //if no header is generated then flow control means we can't send anything
            if(header.getByteBuffer() == null) {
                //we clear the header, as we want to generate a new real header when the flow control window is updated
                ((SpdyStreamStreamSinkChannel) newFrame).clearHeader();
                return false;
            }
        }
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    public void frameAdded(SpdyStreamSinkChannel addedFrame, List<SpdyStreamSinkChannel> pendingFrames, Deque<SpdyStreamSinkChannel> holdFrames) {
        Iterator<SpdyStreamSinkChannel> it = holdFrames.iterator();
        while (it.hasNext()){
            SpdyStreamSinkChannel pending = it.next();
            if(pending instanceof SpdyStreamStreamSinkChannel) {
                SendFrameHeader header = ((SpdyStreamStreamSinkChannel) pending).generateSendFrameHeader();
                if(header.getByteBuffer() != null) {
                    pendingFrames.add(pending);
                    it.remove();
                } else {
                    //we clear the header, as we want to generate a new real header when the flow control window is updated
                    ((SpdyStreamStreamSinkChannel) pending).clearHeader();
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        int firstInt = SpdyChannel.CONTROL_FRAME | (getChannel().getSpdyVersion() << 16) | SpdyChannel.PING;
        SpdyProtocolUtils.putInt(buf, firstInt);
        SpdyProtocolUtils.putInt(buf, 4); //we back fill the length
        SpdyProtocolUtils.putInt(buf, id);
        return new SendFrameHeader(new ImmediatePooled<>(buf));
    }
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        }
    }

    @Override
    protected final SendFrameHeader createFrameHeader() {
        SendFrameHeader header = this.header;
        this.header = null;
        return header;
    }
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    @Override
    public boolean insertFrame(AbstractHttp2StreamSinkChannel newFrame, List<AbstractHttp2StreamSinkChannel> pendingFrames) {
        //first deal with flow control
        if (newFrame instanceof Http2StreamSinkChannel) {
            SendFrameHeader header = ((Http2StreamSinkChannel) newFrame).generateSendFrameHeader();
            //if no header is generated then flow control means we can't send anything
            if (header.getByteBuffer() == null) {
                //we clear the header, as we want to generate a new real header when the flow control window is updated
                ((Http2StreamSinkChannel) newFrame).clearHeader();
                return false;
            }
        }
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    public void frameAdded(AbstractHttp2StreamSinkChannel addedFrame, List<AbstractHttp2StreamSinkChannel> pendingFrames, Deque<AbstractHttp2StreamSinkChannel> holdFrames) {
        Iterator<AbstractHttp2StreamSinkChannel> it = holdFrames.iterator();
        while (it.hasNext()) {
            AbstractHttp2StreamSinkChannel pending = it.next();
            if (pending instanceof Http2StreamSinkChannel) {
                SendFrameHeader header = ((Http2StreamSinkChannel) pending).generateSendFrameHeader();
                if (header.getByteBuffer() != null) {
                    pendingFrames.add(pending);
                    it.remove();
                } else {
                    //we clear the header, as we want to generate a new real header when the flow control window is updated
                    ((Http2StreamSinkChannel) pending).clearHeader();
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    @Override
    protected SendFrameHeader createFrameHeaderImpl() {
        final int fcWindow = grabFlowControlBytes(getBuffer().remaining());
        if (fcWindow == 0 && getBuffer().hasRemaining()) {
            //flow control window is exhausted
            return new SendFrameHeader(getBuffer().remaining(), null);
        }
        final boolean finalFrame = isWritesShutdown() && fcWindow >= getBuffer().remaining();
        Pooled<ByteBuffer> firstHeaderBuffer = getChannel().getBufferPool().allocate();
        Pooled<ByteBuffer>[] allHeaderBuffers = null;
        ByteBuffer firstBuffer = firstHeaderBuffer.getResource();
        boolean firstFrame = false;
        if (first) {
            firstFrame = true;
            first = false;
            //back fill the length
            firstBuffer.put((byte) 0);
            firstBuffer.put((byte) 0);
            firstBuffer.put((byte) 0);

            firstBuffer.put((byte) frameType); //type
            firstBuffer.put((byte) ((isWritesShutdown() && !getBuffer().hasRemaining() ? Http2Channel.HEADERS_FLAG_END_STREAM : 0) | Http2Channel.HEADERS_FLAG_END_HEADERS)); //flags

            Http2ProtocolUtils.putInt(firstBuffer, getStreamId());

            HpackEncoder.State result = encoder.encode(headers, firstBuffer);
            Pooled<ByteBuffer> current = firstHeaderBuffer;
            int length = firstBuffer.position() - 9;
            while (result != HpackEncoder.State.COMPLETE) {
                //todo: add some kind of limit here
                allHeaderBuffers = allocateAll(allHeaderBuffers, current);
                current = allHeaderBuffers[allHeaderBuffers.length - 1];
                result = encoder.encode(headers, current.getResource());
                length += current.getResource().position();
            }
            firstBuffer.put(0, (byte) ((length >> 16) & 0xFF));
            firstBuffer.put(1, (byte) ((length >> 8) & 0xFF));
            firstBuffer.put(2, (byte) (length & 0xFF));
        }

        Pooled<ByteBuffer> currentPooled = allHeaderBuffers == null ? firstHeaderBuffer : allHeaderBuffers[allHeaderBuffers.length - 1];
        ByteBuffer currentBuffer = currentPooled.getResource();
        int remainingInBuffer = 0;
        if (getBuffer().remaining() > 0) {
            if (fcWindow > 0) {
                //make sure we have room in the header buffer
                if (currentBuffer.remaining() < 8) {
                    allHeaderBuffers = allocateAll(allHeaderBuffers, currentPooled);
                    currentPooled = allHeaderBuffers == null ? firstHeaderBuffer : allHeaderBuffers[allHeaderBuffers.length - 1];
                    currentBuffer = currentPooled.getResource();
                }
                remainingInBuffer = getBuffer().remaining() - fcWindow;
                getBuffer().limit(getBuffer().position() + fcWindow);

                currentBuffer.put((byte) ((fcWindow >> 16) & 0xFF));
                currentBuffer.put((byte) ((fcWindow >> 8) & 0xFF));
                currentBuffer.put((byte) (fcWindow & 0xFF));
                currentBuffer.put((byte) Http2Channel.FRAME_TYPE_DATA); //type
                currentBuffer.put((byte) (finalFrame ? Http2Channel.HEADERS_FLAG_END_STREAM : 0)); //flags
                Http2ProtocolUtils.putInt(currentBuffer, getStreamId());

            } else {
                remainingInBuffer = getBuffer().remaining();
            }
        } else if (finalFrame && !firstFrame) {
            currentBuffer.put((byte) 0);
            currentBuffer.put((byte) 0);
            currentBuffer.put((byte) 0);
            currentBuffer.put((byte) Http2Channel.FRAME_TYPE_DATA); //type
            currentBuffer.put((byte) (Http2Channel.HEADERS_FLAG_END_STREAM & 0xFF)); //flags
            Http2ProtocolUtils.putInt(currentBuffer, getStreamId());
        }
        if (allHeaderBuffers == null) {
            //only one buffer required
            currentBuffer.flip();
            return new SendFrameHeader(remainingInBuffer, currentPooled);
        } else {
            //headers were too big to fit in one buffer
            //for now we will just copy them into a big buffer
            int length = 0;
            for (int i = 0; i < allHeaderBuffers.length; ++i) {
                length += allHeaderBuffers[i].getResource().position();
                allHeaderBuffers[i].getResource().flip();
            }
            try {
                ByteBuffer newBuf = ByteBuffer.allocate(length);

                for (int i = 0; i < allHeaderBuffers.length; ++i) {
                    newBuf.put(allHeaderBuffers[i].getResource());
                }
                newBuf.flip();
                return new SendFrameHeader(remainingInBuffer, new ImmediatePooled<ByteBuffer>(newBuf));
            } finally {
                //the allocate can oome
                for (int i = 0; i < allHeaderBuffers.length; ++i) {
                    allHeaderBuffers[i].free();
                }
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        buf.put((byte) 0);
        Http2ProtocolUtils.putInt(buf, 0); //stream id, must be zero
        for (int i = 0; i < PING_FRAME_LENGTH; ++i) {
            buf.put(data[i]);
        }
        return new SendFrameHeader(new ImmediatePooled<>(buf));
    }
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