python阿里云发送短信api V3版本请求/签名验证（非sdk）

# -*- coding: utf-8 -*-
'''
@Date 2025-01-03

'''

#阿里云短信发送 非sdk 版本
#阿里云api v3版本请求体/签名验证

import random
import requests
import time,pytz
import json
import datetime
try:
    from urllib import quote_plus,urlencode
except:
    from urllib.parse import quote_plus,urlencode

import hashlib,hmac


def get_now_datetime(fmt='%Y-%m-%d %H:%M:%S'):
    """
    """
    now_datetime = datetime.datetime.utcnow().strftime(fmt)
    #now_datetime = datetime.datetime.now(pytz.timezone('Etc/GMT')).strftime(fmt)
    return now_datetime

def get_nonce():
    """
    """
    now_ts = time.time() * 1000
    return "%d%s"%(now_ts,random.randint(100,999))

def hashlib_hmac(key,data):
    """
    """
    return hmac.new(key.encode("utf8"), data.encode('utf8'), hashlib.sha256).hexdigest()

def hashlib_sha256(hstr):
    """
    """
    return hashlib.sha256(hstr.encode("utf8")).hexdigest()
    
def pquote(code):
    """
    """
    q = quote_plus(code)
    return q.replace('+', '%20').replace('*', '%2A').replace('%7E', '~')


def algorithm():
    return "ACS3-HMAC-SHA256"
    
d