python代码实现扫码关注公众号登录的实战

app_id = 'xxxx'
app_secret = 'xxxxxx'
url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}'.format(app_id, app_secret)
resp = requests.get(url)
rs = util.get_redis_con()
access_token = resp.json()['access_token']
print(access_token)

my_scene_str = 'xxxxx'  # 场景码可以做个key放到redis里并设置一个和二维码一样的过期时间 
url = 'https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token={0}'.format(access_token)
data = {
        "expire_seconds": 604800,
        "action_name": "QR_STR_SCENE",
        "action_info": {"scene": {"scene_str": md5_user_key}}
}
resp = requests.post(url, json=data)
ticket = resp.json()['ticket']

url = 'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=' + ticket
resp = requests.get(url)
img = base64.b64encode(resp.content).decode('ascii')
print(img)

<xml>
<ToUserName><![CDATA[xxxxxxxxxxxxx]]></ToUserName>
<FromUserName><![CDATA[xxxxxxxxxxx]]></FromUserName>
<CreateTime>1609128953</CreateTime>
<MsgType><![CDATA[event]]></MsgType>
<Event><![CDATA[subscribe]]></Event>
<EventKey><![CDATA[xxxxxx]]></EventKey>
<Ticket><![CDATA[xxxxxxxx]]></Ticket>
</xml>

<xml>
<ToUserName><![CDATA[xxxxxxxxxxxx]]></ToUserName>
<FromUserName><![CDATA[xxxxxxxxxxxxx]]></FromUserName>
<CreateTime>1609127524</CreateTime>
<MsgType><![CDATA[event]]></MsgType>
<Event><![CDATA[SCAN]]></Event>
<EventKey><![CDATA[xxxxxxxxxxxxxx]]></EventKey>
<Ticket><![CDATA[xxxxxxxxxxxxxxxxxxx]]></Ticket>
</xml>

import xml.etree.ElementTree as ET
root = ET.fromstring(request.data.decode('utf-8'))
dic = {}
for x in root:
    dic[x.tag] = x.text

if dic.get('MsgType') == 'event':
    if dic.get('Event') == 'subscribe':
        parse_subscribe(dic)  # 新关注用户扫码
    if dic.get('Event') == 'SCAN':
        parse_scan(dic)  # 已经关注用户扫码

url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token={access_token}&openid={open_id}&lang=zh_CN"
resp = requests.get(url.format(access_token=access_token, open_id=open_id))
resp.encoding = 'utf-8'
return resp.json()

{'subscribe': 1, 
'openid': 'xxxxxxxxxxxxxxxxxxx', 
'nickname': 'xxx', 
'sex': 1, 
'language': 'zh_CN', 
'city': 'xx',
 'province': 'xx', 
 'country': 'xx', 
 'headimgurl': 'http://thirdwx.qlogo.cn/mmopen/xxxxxxxxxxxxxxxxxx/xxx', 
 'subscribe_time': 1609128953, 
 'unionid': 'xxxxxxxxxxxxxxxxx', 
 'remark': '', 
 'groupid': 0, 
 'tagid_list': [], 
 'subscribe_scene': 'ADD_SCENE_QR_CODE', 
 'qr_scene': 0, 
 'qr_scene_str': 'xxxxxxxxxxxxxxxxxxxx'}