详解python websocket获取实时数据的几种常见链接方式

第一种, 使用create_connection链接，需要pip install websocket-client (此方法不建议使用，链接不稳定，容易断，并且连接很耗时)

import timefrom websocket import create_connectionurl = 'wss://i.cg.net/wi/ws'while True: # 一直链接，直到连接上就退出循环 time.sleep(2) try: ws = create_connection(url) print(ws) break except Exception as e: print('连接异常：', e) continuewhile True: # 连接上，退出第一个循环之后，此循环用于一直获取数据 ws.send('{'event':'subscribe', 'channel':'btc_usdt.ticker'}') response = ws.recv() print(response)

第二种,运行效果很不错，很容易连接，获取数据的速度也挺快

import jsonfrom ws4py.client.threadedclient import WebSocketClientclass 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()

第三种，其实和第一种差不多，只不过换种写法而已，运行效果不理想，连接耗时，并且容易断

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

第四种，运行效果也可以，run_forever里面有许多参数，需要自己设置

import websocketdef on_message(ws, message): # 服务器有数据更新时，主动推送过来的数据  print(message)def on_error(ws, error): # 程序报错时，就会触发on_error事件  print(error)def on_close(ws):  print('Connection closed ……')def on_open(ws): # 连接到服务器之后就会触发on_open事件，这里用于send数据  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)

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。