bitbank Socket.IO ライブラリを用いたエンコードとパース

tmp.50t2wAqcq3.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import aiohttp\n",
    "from engineio.packet import Packet as PacketEIO, MESSAGE\n",
    "from socketio.packet import Packet as PacketSIO, EVENT"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "request = None\n",
    "response = []\n",
    "\n",
    "async with aiohttp.ClientSession() as session: # type: ignore\n",
    "    async with session.ws_connect(\"wss://stream.bitbank.cc/socket.io/?EIO=3&transport=websocket\") as ws: # type: ignore\n",
    "        # Request\n",
    "        data = [\"join-room\", \"ticker_btc_jpy\"]\n",
    "        siopkt = PacketSIO(EVENT, data=data)\n",
    "        eiopkt = PacketEIO(MESSAGE, data=siopkt.encode())\n",
    "        request = eiopkt.encode()\n",
    "        await ws.send_str(request)\n",
    "\n",
    "        # Response\n",
    "        async for msg in ws: # type: ignore\n",
    "            eiopkt = PacketEIO(encoded_packet=msg.data)\n",
    "            siopkt = PacketSIO(encoded_packet=eiopkt.data)\n",
    "            response.append((siopkt.packet_type, siopkt.data))\n",
    "            if len(response) >= 5:\n",
    "                break"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'42[\"join-room\",\"ticker_btc_jpy\"]'"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "request"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[({'sid': 'y1m81mEhLspzkrAtDJIV',\n",
       "   'upgrades': [],\n",
       "   'pingInterval': 25000,\n",
       "   'pingTimeout': 5000},\n",
       "  None),\n",
       " (0, None),\n",
       " (2,\n",
       "  ['message',\n",
       "   {'room_name': 'ticker_btc_jpy',\n",
       "    'message': {'data': {'sell': '2755001',\n",
       "      'buy': '2755000',\n",
       "      'open': '2970912',\n",
       "      'high': '2978970',\n",
       "      'low': '2683700',\n",
       "      'last': '2755000',\n",
       "      'vol': '1061.8436',\n",
       "      'timestamp': 1655441974644}}}]),\n",
       " (2,\n",
       "  ['message',\n",
       "   {'room_name': 'ticker_btc_jpy',\n",
       "    'message': {'data': {'sell': '2755001',\n",
       "      'buy': '2755000',\n",
       "      'open': '2970912',\n",
       "      'high': '2978970',\n",
       "      'low': '2683700',\n",
       "      'last': '2755000',\n",
       "      'vol': '1061.8436',\n",
       "      'timestamp': 1655441975710}}}]),\n",
       " (2,\n",
       "  ['message',\n",
       "   {'room_name': 'ticker_btc_jpy',\n",
       "    'message': {'data': {'sell': '2755001',\n",
       "      'buy': '2755000',\n",
       "      'open': '2970912',\n",
       "      'high': '2978970',\n",
       "      'low': '2683700',\n",
       "      'last': '2755000',\n",
       "      'vol': '1061.8436',\n",
       "      'timestamp': 1655441976653}}}])]"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "response"
   ]
  }
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