private void handleHTTP(OutPacketMessage msg, ChannelHandlerContext ctx, ChannelPromise promise) throws IOException { Channel channel = ctx.channel(); Attribute<Boolean> attr = channel.attr(WRITE_ONCE); Queue<Packet> queue = msg.getClientHead().getPacketsQueue(msg.getTransport()); if (!channel.isActive() || queue.isEmpty() || !attr.compareAndSet(null, true)) { promise.setSuccess(); return; } ByteBuf out = encoder.allocateBuffer(ctx.alloc()); Boolean b64 = ctx.channel().attr(EncoderHandler.B64).get(); if (b64 != null && b64) { Integer jsonpIndex = ctx.channel().attr(EncoderHandler.JSONP_INDEX).get(); encoder.encodeJsonP(jsonpIndex, queue, out, ctx.alloc(), 50); String type = "application/javascript"; if (jsonpIndex == null) { type = "text/plain"; } sendMessage(msg, channel, out, type, promise); } else { encoder.encodePackets(queue, out, ctx.alloc(), 50); sendMessage(msg, channel, out, "application/octet-stream", promise); } }