如果我使用的這些參數訂閱消息:
params = {
"type": "subscribe",
"channels": [{"name": "ticker", "product_ids": ["BTC-EUR"]}]
}
每一個新的貿易執行(和可見http://www.gdax.com)的時候,我得到這樣的消息從網絡插口:
{
u'best_ask': u'3040.01',
u'best_bid': u'3040',
u'last_size': u'0.10000000',
u'price': u'3040.00000000',
u'product_id': u'BTC-EUR',
u'sequence': 2520531767,
u'side': u'sell',
u'time': u'2017-09-16T16:16:30.089000Z',
u'trade_id': 4138962,
u'type': u'ticker'
}
就在這個特別的消息後,我做了上https://api.gdax.com/products/BTC-EUR/ticker得到,我得到這個:
{
"trade_id": 4138962,
"price": "3040.00000000",
"size": "0.10000000",
"bid": "3040",
"ask": "3040.01",
"volume": "4121.15959844",
"time": "2017-09-16T16:16:30.089000Z"
}
目前的數據是從網絡套接字相同得到請求。
請在下面找到一個完整的測試腳本,用這個代碼實現一個web套接字。
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Test for websockets."""
from websocket import WebSocketApp
from json import dumps, loads
from pprint import pprint
URL = "wss://ws-feed.gdax.com"
def on_message(_, message):
"""Callback executed when a message comes.
Positional argument:
message -- The message itself (string)
"""
pprint(loads(message))
print
def on_open(socket):
"""Callback executed at socket opening.
Keyword argument:
socket -- The websocket itself
"""
params = {
"type": "subscribe",
"channels": [{"name": "ticker", "product_ids": ["BTC-EUR"]}]
}
socket.send(dumps(params))
def main():
"""Main function."""
ws = WebSocketApp(URL, on_open=on_open, on_message=on_message)
ws.run_forever()
if __name__ == '__main__':
main()
我最近在探索gdax API,並且有同樣的問題。不知道他們如何計算股票「價格」。我仍然因爲這個原因結束了投票(每5秒一次)。 – Aknosis