Package io.undertow.server.protocol.framed

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

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        Http2ProtocolUtils.putInt(buf, 0); //stream id, must be zero
        for (int i = 0; i < PING_FRAME_LENGTH; ++i) {
            buf.put(data[i]);
        }
        buf.flip();
        return new SendFrameHeader(new ImmediatePooled<>(buf));
    }
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        super(channel, 0);
    }

    @Override
    protected SendFrameHeader createFrameHeaderImpl() {
        return new SendFrameHeader(new ImmediatePooled<>(ByteBuffer.wrap(Http2Channel.PREFACE_BYTES)));
    }
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            currentBuffer.put((byte) Http2Channel.FRAME_TYPE_SETTINGS); //type
            currentBuffer.put((byte) Http2Channel.SETTINGS_FLAG_ACK); //flags
            Http2ProtocolUtils.putInt(currentBuffer, getStreamId());
        }
        currentBuffer.flip();
        return new SendFrameHeader(pooled);
    }
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    protected SendFrameHeader createFrameHeaderImpl() {
        //TODO: this is a mess WRT re-using between headers and push_promise, sort out a more reasonable abstraction
        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) 0); //back fill the flags
            Http2ProtocolUtils.putInt(firstBuffer, getStreamId());
            writeBeforeHeaderBlock(firstBuffer);

            HpackEncoder.State result = encoder.encode(headers, firstBuffer);
            Pooled<ByteBuffer> current = firstHeaderBuffer;
            int headerFrameLength = firstBuffer.position() - 9;
            firstBuffer.put(0, (byte) ((headerFrameLength >> 16) & 0xFF));
            firstBuffer.put(1, (byte) ((headerFrameLength >> 8) & 0xFF));
            firstBuffer.put(2, (byte) (headerFrameLength & 0xFF));
            firstBuffer.put(4, (byte) ((isWritesShutdown() && !getBuffer().hasRemaining() && frameType == Http2Channel.FRAME_TYPE_HEADERS ? Http2Channel.HEADERS_FLAG_END_STREAM : 0) | (result == HpackEncoder.State.COMPLETE ? Http2Channel.HEADERS_FLAG_END_HEADERS : 0 ))); //flags
            while (result != HpackEncoder.State.COMPLETE) {
                //todo: add some kind of limit here

                allHeaderBuffers = allocateAll(allHeaderBuffers, current);
                current = allHeaderBuffers[allHeaderBuffers.length - 1];
                //continuation frame
                //note that if the buffers are small we may not actually need a continuation here
                //but it greatly reduces the code complexity
                //back fill the length
                ByteBuffer currentBuffer = current.getResource();
                currentBuffer.put((byte) 0);
                currentBuffer.put((byte) 0);
                currentBuffer.put((byte) 0);
                currentBuffer.put((byte) Http2Channel.FRAME_TYPE_CONTINUATION); //type
                currentBuffer.put((byte) 0); //back fill the flags
                Http2ProtocolUtils.putInt(currentBuffer, getStreamId());
                result = encoder.encode(headers, currentBuffer);
                int contFrameLength = currentBuffer.position() - 9;
                currentBuffer.put(0, (byte) ((contFrameLength >> 16) & 0xFF));
                currentBuffer.put(1, (byte) ((contFrameLength >> 8) & 0xFF));
                currentBuffer.put(2, (byte) (contFrameLength & 0xFF));
                currentBuffer.put(4, (byte) (result == HpackEncoder.State.COMPLETE ? Http2Channel.HEADERS_FLAG_END_HEADERS : 0 )); //flags
            }
        }

        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
        Http2ProtocolUtils.putInt(buf, lastGoodStreamId);
        Http2ProtocolUtils.putInt(buf, status);
        buf.flip();
        return new SendFrameHeader(new ImmediatePooled<>(buf));
    }
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        Http2ProtocolUtils.putInt(buf, HEADER_FIRST_LINE);
        buf.put((byte)0);
        Http2ProtocolUtils.putInt(buf, streamId);
        Http2ProtocolUtils.putInt(buf, errorCode);
        buf.flip();
        return new SendFrameHeader(new ImmediatePooled<>(buf));
    }
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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;
            int firstInt = SpdyChannel.CONTROL_FRAME | (getChannel().getSpdyVersion() << 16) | 2;
            SpdyProtocolUtils.putInt(firstBuffer, firstInt);
            SpdyProtocolUtils.putInt(firstBuffer, 0); //we back fill the length
            HeaderMap headers = this.headers;

            SpdyProtocolUtils.putInt(firstBuffer, getStreamId());


            headers.remove(Headers.CONNECTION); //todo: should this be here?
            headers.remove(Headers.KEEP_ALIVE);
            headers.remove(Headers.TRANSFER_ENCODING);

            allHeaderBuffers = createHeaderBlock(firstHeaderBuffer, allHeaderBuffers, firstBuffer, headers);
        }

        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);
                SpdyProtocolUtils.putInt(currentBuffer, getStreamId());
                SpdyProtocolUtils.putInt(currentBuffer, ((finalFrame ? SpdyChannel.FLAG_FIN : 0) << 24) + fcWindow);
            } else {
                remainingInBuffer = getBuffer().remaining();
            }
        } else if(finalFrame && !firstFrame) {
            SpdyProtocolUtils.putInt(currentBuffer, getStreamId());
            SpdyProtocolUtils.putInt(currentBuffer, SpdyChannel.FLAG_FIN  << 24);
        }
        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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            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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        Http2ProtocolUtils.putInt(buf, HEADER_FIRST_LINE);
        buf.put((byte)0);
        Http2ProtocolUtils.putInt(buf, streamId);
        Http2ProtocolUtils.putInt(buf, deltaWindowSize);
        buf.flip();
        return new SendFrameHeader(new ImmediatePooled<>(buf));
    }
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