异步协程
aiohttp 注意语法糖 (async \await )异步调运
关键词
event_loop 事件循环:程序开启一个无限的循环,程序员会把一些函数注册到事件循环上。当满足事件发生的时候,调用相应的协程函数。
coroutine 协程:协程对象,指一个使用async关键字定义的函数,它的调用不会立即执行函数,而是会返回一个协程对象。协程对象需要注册到事件循环,由事件循环调用。
task 任务:一个协程对象就是一个原生可以挂起的函数,任务则是对协程进一步封装,其中包含任务的各种状态。
future: 代表将来执行或没有执行的任务的结果。它和task上没有本质的区别
async/await 关键字:python3.5 用于定义协程的关键字,async定义一个协程,await用于挂起阻塞的异步调用接口。
# !/usr/bin/python3
# -*- coding: utf-8 -*-
# Author: WangChao
import asyncio
import json
import logging
import time
from aiohttp import ClientSession
class Aiowechat:
options= None
def __init__(self, options=None):
self.options= optionsif isinstance(options,dict) else dict()
self.corpid= '**********'
self.corpsecret= '***********'
self.url= '************'
self.token_now= 0
self.token= None
@staticmethod
async def load_logger():
logger= logging.getLogger(name=__name__)
return logger
async def get_token(self):
"""获取token值"""
if int(time.time()) - self.token_now> 7000:
token_url= '%s/cgi-bin/gettoken?corpid=%s&corpsecret=%s' % (self.url,self.corpid,self.corpsecret)
async with ClientSession() as session:
async with session.get(token_url) as response:
content= await response.read()
token= json.loads(content.decode()).get('access_token','')
self.token= token
self.token_now= int(time.time())
return self.token
@staticmethod
async def messages(touser, wechat_msg):
"""构建发送数据"""
values= {
"touser": touser,
"msgtype": "text",
"agentid": 1000007,
"text": {
"content": wechat_msg,},
"safe": 0,
"enable_id_trans": 0,
"enable_duplicate_check": 0,
}
msges= (bytes(json.dumps(values),'utf-8'))
return msges
async def send(self, touser, wechat_data):
"""发送"""
token= await self.get_token()
msg= wechat_data.get('msg')
send_url= '%s/cgi-bin/message/send?access_token=%s' % (self.url, token)
data= await self.messages(touser, msg)
async with ClientSession() as session:
async with session.post(send_url,data=data) as response:
response= await response.read()
state= json.loads(response.decode()).get('errcode','')
logger= await self.load_logger()
if state== 0:
logger.warning('企业微信报警通知 to-{} 成功'.format(touser))
else:
logger.error('企业微信报警通知 to-{0}失败 状态码:{1}'.format(touser, state))
async def exec(self, data):
tousers= data.get('tousers')
tasks= []
for touserin tousers:
tasks.append(asyncio.ensure_future(self.send(touser, data)))
return tasks
if __name__== '__main__':
we= Aiowechat(Aiowechat.load_env())
data= {
'tousers': ['***','***********'],
'msg': '多人测试',
}
loop= asyncio.get_event_loop()
tasks= loop.run_until_complete(we.exec(data=data))
loop.run_until_complete(asyncio.wait(tasks))
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