Python

Last updated: 2020-05-08 17:49:30

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Operation Scenarios

This document describes how to authenticate and manage your APIs through key pair authentication in Python.

Directions

  1. In the API Gateway Console, create an API and select the authentication type as "key pair authentication" (for more information, please see API Creation Overview).
  2. Publish the service where the API resides to the release environment (for more information, please see Service Release and Deactivation).
  3. Create a key pair on the key management page in the console.
  4. Create a usage plan on the usage plan page in the console and bind it to the created key pair (for more information, please see Sample Usage Plan).
  5. Bind the usage plan to the API or the service where the API resides.
  6. Generate signing information in Python by referring to the Sample Code.

Environment Dependencies

Python 2.7.

Notes

  • The eventually delivered HTTP request contains at least two headers: Date or X-Date and Authorization. More optional headers can be added in the request. If Date is used, the server will not check the time; if X-Date is used, the server will check the time.
  • The value of Date header is the construction time of the HTTP request in GMT format, such as Fri, 09 Oct 2015 00:00:00 GMT.
  • The value of X-Date header is the construction time of the HTTP request in GMT format, such as Mon, 19 Mar 2018 12:08:40 GMT. It cannot deviate from the current time for more than 15 minutes.
  • If it is a microservice API, you need to add two fields in the header: X-NameSpace-Code and X-MicroService-Name. They are not needed for general APIs and are included in the demo by default.

Sample Code

# -*- coding: utf-8 -*-
import requests
import datetime
import hashlib
from hashlib import sha1
import hmac
import base64


GMT_FORMAT = '%a, %d %b %Y %H:%M:%S GMT'

def getSimpleSign(source, SecretId, SecretKey) :
    dateTime = datetime.datetime.utcnow().strftime(GMT_FORMAT)
    auth = "hmac id=\"" + SecretId + "\", algorithm=\"hmac-sha1\", headers=\"date source\", signature=\""
    signStr = "date: " + dateTime + "\n" + "source: " + source
    sign = hmac.new(SecretKey, signStr, hashlib.sha1).digest()
    sign = base64.b64encode(sign)
    sign = auth + sign + "\""
    return sign, dateTime

SecretId = 'your SecretId' # `SecretId` in key pair
SecretKey = 'your SecretKey' # `SecretKey` in key pair
url = 'http://service-xxxxxx-1234567890.ap-guangzhou.apigateway.myqcloud.com/release/xxx' # API access path

#header = {}
header = { 'Host':'service-xxxxxx-1234567890.ap-guangzhou.apigateway.myqcloud.com', # Service domain name of API
            'Accept': 'text/html, */*; q=0.01',
            'X-Requested-With': 'XMLHttpRequest',
            'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36',
            'Accept-Encoding': 'gzip, deflate, sdch',
            'Accept-Language': 'zh-CN,zh;q=0.8,ja;q=0.6'
}

Source = 'xxxxxx' # Arbitrary signature watermark value
sign, dateTime = getSimpleSign(Source, SecretId, SecretKey)
header['Authorization'] = sign
header['Date'] = dateTime
header['Source'] = Source

# If it is a microservice API, you need to add two fields in the header: 'X-NameSpace-Code' and 'X-MicroService-Name'. They are not needed for general APIs.
header['X-NameSpace-Code'] = 'testmic'
header['X-MicroService-Name'] = 'provider-demo'

print header

r = requests.get(url, headers=header)
print r
print r.text