詳解python websocket獲取實時數(shù)據的幾種常見鏈接方式

import time
from websocket import create_connection

url = 'wss://i.cg.net/wi/ws'
while True: # 一直鏈接，直到連接上就退出循環(huán)
  time.sleep(2)
  try:
    ws = create_connection(url)
    print(ws)
    break
  except Exception as e:
    print('連接異常：', e)
    continue
while True: # 連接上，退出第一個循環(huán)之后，此循環(huán)用于一直獲取數(shù)據
  ws.send('{"event":"subscribe", "channel":"btc_usdt.ticker"}')
  response = ws.recv()
  print(response)

import json
from ws4py.client.threadedclient import WebSocketClient


class CG_Client(WebSocketClient):

  def opened(self):
    req = '{"event":"subscribe", "channel":"eth_usdt.deep"}'
    self.send(req)

  def closed(self, code, reason=None):
    print("Closed down:", code, reason)

  def received_message(self, resp):
    resp = json.loads(str(resp))
    data = resp['data']
    if type(data) is dict:
      ask = data['asks'][0]
      print('Ask:', ask)
      bid = data['bids'][0]
      print('Bid:', bid)


if __name__ == '__main__':
  ws = None
  try:
    ws = CG_Client('wss://i.cg.net/wi/ws')
    ws.connect()
    ws.run_forever()
  except KeyboardInterrupt:
    ws.close()

import websocket

while True:
  ws = websocket.WebSocket()
  try:
    ws.connect("wss://i.cg.net/wi/ws")
    print(ws)
    break
  except Exception as e:
    print('異常：', e)
    continue
print('OK')
while True:
  req = '{"event":"subscribe", "channel":"btc_usdt.deep"}'
  ws.send(req)
  resp = ws.recv()
  print(resp)

import websocket


def on_message(ws, message): # 服務器有數(shù)據更新時，主動推送過來的數(shù)據
  print(message)


def on_error(ws, error): # 程序報錯時，就會觸發(fā)on_error事件
  print(error)


def on_close(ws):
  print("Connection closed ……")


def on_open(ws): # 連接到服務器之后就會觸發(fā)on_open事件，這里用于send數(shù)據
  req = '{"event":"subscribe", "channel":"btc_usdt.deep"}'
  print(req)
  ws.send(req)


if __name__ == "__main__":
  websocket.enableTrace(True)
  ws = websocket.WebSocketApp("wss://i.cg.net/wi/ws",
                on_message=on_message,
                on_error=on_error,
                on_close=on_close)
  ws.on_open = on_open
  ws.run_forever(ping_timeout=30)