阿里雲API 的封裝類

 最近有時間研究了一下阿里雲api使用手冊，對api 進行簡單封裝了一下，能夠簡化阿里雲 api調用。

   
#-*- coding: utf-8 -*-
# author: sunwei

import json
import uuid
from urllib import request
import hmac,base64
from hashlib import sha1
from datetime import datetime, timedelta, timezone,date
from urllib.parse import urlencode,quote
from abc import ABCMeta,abstractclassmethod

class BaseSignature(object):
    __metaclass__ = ABCMeta

    def __init__(self,Access_Key_Id,Access_key_secret,Format='JSON'):

        self.AccessKeyId = str(Access_Key_Id)
        self.AccessKeySecret = str(Access_key_secret)
        self.SignatureMethod = 'HMAC-SHA1'
        self.SignatureVersion = '1.0'
        self.SignatureNonce = str(uuid.uuid4())
        self.Format = Format
        self.Action = ''
        self.Version = ''

    def params(self):
           self.D = {}
           self.D['Action'] = self.Action
           self.D.update(self.kv)
           self.kv.clear()
           self.D['SignatureMethod'] = self.SignatureMethod
           self.D['AccessKeyId'] = self.AccessKeyId
           self.D['SignatureVersion'] = self.SignatureVersion
           self.D['SignatureNonce'] = self.SignatureNonce
           self.D['Timestamp'] = self._UtcTimeStamp()
           self.D['Version'] = self.Version
           self.D['Format'] = self.Format


    def _ToSign(self):

        sortedD = sorted(self.D.items(), key=lambda x: x[0])
        canstring = ''
        for k, v in sortedD:
            #print(k,v)
            canstring += '&' + self.percentEncode(k) + '=' + self.percentEncode(v)
        stringToSign = 'GET&%2F&' + self.percentEncode(canstring[1:])
        return stringToSign.encode('utf-8')

    def Signature(self):
        key = (self.AccessKeySecret + '&').encode('utf-8')
        v = self._ToSign()
        h = hmac.new(key , v, sha1)
        return  base64.encodebytes(h.digest()).strip().decode('utf-8')

    def percentEncode(self,s):

        res = quote(s,'')
        res = res.replace('+', '%20')
        res = res.replace('*', '%2A')
        res = res.replace('%7E', '~')
        return res

    def _UtcTimeStamp(self):
        return (datetime.now() - timedelta(hours=8)).strftime('%Y-%m-%dT%XZ')

    def urlencode(self):

        self.params()
        self.D['Signature'] = self.Signature()

        return urlencode(self.D)

    @abstractclassmethod
    def url(self): pass


class BaseApi(BaseSignature):

    Version = ''
    Baseurl = ''

    def __init__(self, Access_Key_Id, Access_key_secret,Format='JSON'):
        super(BaseApi,self).__init__(Access_Key_Id, Access_key_secret, Format)

    def url(self,**kwargs):
        kv = kwargs
        self.Action = kv.pop('Action')
        self.SignatureNonce = str(uuid.uuid4())
        self.kv = kv
        d = {k: v for k, v in self.__class__.__dict__.items() if not k.startswith('_') and not k.startswith('Baseurl')}
        self.Version = d.pop('Version')

        return self.Baseurl + self.urlencode()

from urllib.error import URLError,HTTPError
class DecodeData(object):

    def __call__(self,url):
        try:
            response = request.urlopen(request.Request(url)).read()
            #de = response.decode('utf-8')

            de = json.loads(response)
            ddd = json.dumps(de,indent=4)

        except HTTPError as e:

            ddd = {'Data': e.msg}

        return ddd

class DomainApi(BaseApi):
    """
    Usage :
    
    r = DomainApi(accesskeys,accesskeys_secrey)
    r.url(Action='QueryDomainList',PageNum = '1',PageSize = '20')

    """
    Version = '2018-01-29'
    Baseurl = 'https://domain.aliyuncs.com/?'
    
class RegionApi(BaseApi):
    Version = '2014-05-26'
    Baseurl = "https://ecs.aliyuncs.com/?"
       
class EcsApi(BaseApi):
    Baseurl = 'https://ecs.aliyuncs.com/?'
    Version = '2014-05-26'

class RdsApi(BaseApi):
    Baseurl = 'https://rds.aliyuncs.com/?'
    Version = '2014-08-15'

class SlbApi(BaseApi):
    Baseurl = 'https://slb.aliyuncs.com/?'
    Version = '2014-05-15'

class VpcApi(BaseApi):
    Baseurl = 'https://vpc.aliyuncs.com/?'
    Version = '2016-04-28'


class VpcApi(BaseApi):
    """
    dnat : DescribeForwardTableEntries
    
    """
    Baseurl = "https://vpc.aliyuncs.com/?"
    Version = "2016-04-28"