调用物联网平台云端api时的签名python3实现

import time
import sys
import hashlib
import hmac
import base64
import urllib.parse
def do_sign(secret, sign_content):
    m = hmac.new(secret, sign_content, digestmod=hashlib.sha1)
    return base64.b64encode(m.digest()).decode("utf-8")
def encode(str): 
    result = urllib.parse.quote(str);
    print ("encode===="+result)
    return result
accessKeyId = "";
accessSecret = "";
httpmethod = "POST"
parm = {
    "Format":"JSON",
    "Version":"2018-01-20",
    "AccessKeyId":accessKeyId,
    "SignatureMethod":"HMAC-SHA1",
    "Timestamp":"2021-12-28T06:37:48Z",
    "SignatureVersion":"1.0",
    "SignatureNonce":"86439216304009",
    "Action":"QueryDevice",
    "ProductKey":"a1tDKl1PBkl",
    "RegionId":"cn-shanghai"
    }
str_parm = ''
for p in sorted(parm):
    if(len(str_parm)>0):
        str_parm = str_parm + '&'
    if isinstance(parm[p],str):        
        str_parm = str_parm + str(p) +"="+str(encode(parm[p]))
        continue
    str_parm = str_parm + str(p) +"="+encode(str(parm[p]))
str_parm = httpmethod + '&' + "%2F" + '&' + encode(str_parm);
print (str_parm)
key = accessSecret+'&';
signature = do_sign(key.encode("utf-8"), str_parm.encode("utf-8"))
print ("signature==="+signature) 
print ("最终signature===" + encode(signature))