Python build WeChat public platform access guide

1. Access verification, I am using Python3 here. When executing pip install web.py to install web.py, an error is reported. Change to pip install web.py==0.40.dev0 to install normally.

# -*- coding: utf-8 -*-
import web
import hashlib
urls = (
    '/wx', 'Check',
)

class Check(object):
    def GET(self):
        try:
            data = web.input()
            signature = data.signature
            timestamp = data.timestamp
            nonce = data.nonce
            echostr=data.echostr

            token = "yufu" #This should be consistent with the Token in the basic configuration of the WeChat public platform

            list = [token, timestamp, nonce]
            # sort token, timestamp and nonce lexicographically
            list.sort()
            # Concatenate the sorted results into a string
            list = ''.join(list)
            # sha1 encrypt the result
            hashcode = hashlib.sha1(list.encode('utf8')).hexdigest()
            # If the encryption result is consistent with the signature sent by the WeChat server, the verification is passed, and echostr is returned as it is, otherwise it returns empty
            if hashcode == signature:
                return echostr
            else:
                return ''
        except Exception:
            return Exception

if __name__ == '__main__':
    app = web.application(urls, globals())
    app.run()

 2. Fill in the server configuration, fill in the URL with the domain name and add "/wx", the Token should be the same as the token in the code, and click Submit.

Before this, I submitted it many times, and it always showed that the connection URL timed out. Later, I found that the problem was sha1 encryption. The original code I encrypted was hashcode = hashlib.sha1(list).hexdigest(), and the character encoding of the string to be encrypted was not specified, changed to hashcode = hashlib.sha1(list.encode('utf8')).hexdigest( ) can be used.