V3手动鉴权失败之Python篇

python python_v3.py

# -*- coding: utf-8 -*-
import hashlib, hmac, json, os, sys, time
from datetime import datetime
import requests

# 密钥参数
secret_id = "xxx"# 传入自己的secretId
secret_key = "xxx"# 传入自己的secretKey

service = "iai"
host = "iai.tencentcloudapi.com"
endpoint = "https://" + host
region = "ap-guangzhou"
action = "DetectFace"
version = "2018-03-01"
algorithm = "TC3-HMAC-SHA256"
timestamp = int(time.time())
#timestamp = 1551113065
date = datetime.utcfromtimestamp(timestamp).strftime("%Y-%m-%d")
params = {"Url": "http://www.people.com.cn/mediafile/pic/20150624/51/10411837753251226111.jpg"}

# ************* 步骤 1：拼接规范请求串 *************
http_request_method = "POST"
canonical_uri = "/"
canonical_querystring = ""
ct = "application/json; charset=utf-8"
payload = json.dumps(params)
canonical_headers = "content-type:%s\nhost:%s\n" % (ct, host)
signed_headers = "content-type;host"
hashed_request_payload = hashlib.sha256(payload.encode("utf-8")).hexdigest()
canonical_request = (http_request_method + "\n" +
                     canonical_uri + "\n" +
                     canonical_querystring + "\n" +
                     canonical_headers + "\n" +
                     signed_headers + "\n" +
                     hashed_request_payload)
print(canonical_request)

# ************* 步骤 2：拼接待签名字符串 *************
credential_scope = date + "/" + service + "/" + "tc3_request"
hashed_canonical_request = hashlib.sha256(canonical_request.encode("utf-8")).hexdigest()
string_to_sign = (algorithm + "\n" +
                  str(timestamp) + "\n" +
                  credential_scope + "\n" +
                  hashed_canonical_request)
print(string_to_sign)

# ************* 步骤 3：计算签名 *************
# 计算签名摘要函数
def sign(key, msg):
    return hmac.new(key, msg.encode("utf-8"), hashlib.sha256).digest()
secret_date = sign(("TC3" + secret_key).encode("utf-8"), date)
secret_service = sign(secret_date, service)
secret_signing = sign(secret_service, "tc3_request")
signature = hmac.new(secret_signing, string_to_sign.encode("utf-8"), hashlib.sha256).hexdigest()
print(signature)

# ************* 步骤 4：拼接 Authorization *************
authorization = (algorithm + " " +
                 "Credential=" + secret_id + "/" + credential_scope + ", " +
                 "SignedHeaders=" + signed_headers + ", " +
                 "Signature=" + signature)
print(authorization)

print("curl请求指令如下:")
print('curl -X POST ' + endpoint
      + ' -H "Authorization: ' + authorization + '"'
      + ' -H "Content-Type: application/json; charset=utf-8"'
      + ' -H "Host: ' + host + '"'
      + ' -H "X-TC-Action: ' + action + '"'
      + ' -H "X-TC-Timestamp: ' + str(timestamp) + '"'
      + ' -H "X-TC-Version: ' + version + '"'
      + ' -H "X-TC-Region: ' + region + '"'
      + " -d '" + payload + "'")
      
# 发送http请求
header = {"Authorization":authorization,
           "Content-Type":"application/json; charset=utf-8",
           "Host":host,
           "X-TC-Action":action,
           "X-TC-Timestamp":str(timestamp),
           "X-TC-Version":version,
           "X-TC-Region":region}
# 方法一：传入dict作为json的值
# response = requests.post(url=endpoint, headers=header, json=params)
# 方法二：传入json对象作为data的值，其中payload=json.dumps(params)
response = requests.post(url=endpoint, headers=header, data=payload)
print(response.json())