阿里云CDN刷新脚本

我们用了多个厂商的cdn服务,其中就有阿里云的cdn服务,阿里云cdn api接口文档附件中有python脚本刷新cdn的 脚本实例。该脚本适合在命令行模式手动刷新,如果要在项目里面调用不是太方便,所以适当修改了下。

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#!/usr/bin/python
# -*- coding:utf-8 -*-

import sys,os
import urllib, urllib2
import base64
import hmac
import hashlib
from hashlib import sha1
import time
import uuid

class pushAliCdn:
def __init__(self):
self.cdn_server_address = 'http://cdn.aliyuncs.com'
self.access_key_id = 'xxxxxxxxxxxxxxxx'
self.access_key_secret = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

def percent_encode(self, str):
res = urllib.quote(str.decode(sys.stdin.encoding).encode('utf8'), '')
res = res.replace('+', '%20')
res = res.replace('*', '%2A')
res = res.replace('%7E', '~')
return res

def compute_signature(self, parameters, access_key_secret):
sortedParameters = sorted(parameters.items(), key=lambda parameters: parameters[0])
canonicalizedQueryString = ''
for (k,v) in sortedParameters:
canonicalizedQueryString += '&' + self.percent_encode(k) + '=' + self.percent_encode(v)
stringToSign = 'GET&%2F&' + self.percent_encode(canonicalizedQueryString[1:])
h = hmac.new(access_key_secret + "&", stringToSign, sha1)
signature = base64.encodestring(h.digest()).strip()
return signature

def compose_url(self, user_params):
timestamp = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
parameters = { \
'Format' : 'JSON', \
'Version' : '2014-11-11', \
'AccessKeyId' : self.access_key_id, \
'SignatureVersion' : '1.0', \
'SignatureMethod' : 'HMAC-SHA1', \
'SignatureNonce' : str(uuid.uuid1()), \
'TimeStamp' : timestamp, \
}
for key in user_params.keys():
parameters[key] = user_params[key]
signature = self.compute_signature(parameters, self.access_key_secret)
parameters['Signature'] = signature
url = self.cdn_server_address + "/?" + urllib.urlencode(parameters)
return url

def make_request(self, user_params, quiet=False):
url = self.compose_url(user_params)
#print url
#刷新url
try:
req = urllib2.Request(url)
res_data = urllib2.urlopen(req)
res = res_data.read()
return res
except:
return user_params['ObjectPath'] + ' refresh failed!'

if __name__ == '__main__':
f = pushAliCdn()
params = {'Action': 'RefreshObjectCaches', 'ObjectPath': 'http://xxxxxxxxx/Cannon/test.js', 'ObjectType': 'File'}
res = f.make_request(params)
print res

以后在项目中刷新CDN资源文件,只要传递相应的接口、参数即可。主要使用的接口还是刷新资源文件,其它的操作都是在阿里云的控制台完成。

----------------本文结束 感谢阅读----------------