EarthLiveSharp中cloudinary的CDN图片缓存自动清理

最近总是对地球宇宙着迷。

恰巧发现有个叫“EarthLiveSharp”，可用将日本向日葵8号卫星的地球实时图片设为屏保。向日葵8号卫星的地球实时图片官网为：http://himawari8.nict.go.jp/，EarthLiveSharp的项目地址是：https://github.com/bitdust/EarthLiveSharp。

为了减轻向日葵8号的服务器负担，同时也是提高地球实时图片的获取成功率，需要使用cloudinary来做CDN。注册配置都在软件里有说明。

目前EarthLiveSharp暂时没有清理cloudinary的CDN图片缓存的功能，于是我用python写了一个，并尝试用gist管理，地址为：https://gist.github.com/creke/c5a8a18fa41b8f5c1a0719a7e0cf4de6

同时，为了大家方便，顺便编译成了Windows可执行文件，下载： https://pan.baidu.com/s/1c27fXEo 提取码：k33n

为了自己检索方便，顺便在这里附上python脚本源码，可以作为python如何使用RESTful接口的例子，相关工具类函数也便于参考。

EarthLiveCleanCloudinary.py

# -*- coding: utf-8 -*-
# Author: Creke
# HomePage: http://blog.creke.net

import sys
import urllib, urllib2
import base64
import json

URLLIB_DEBUG_LEVEL = 1
URLLIB_TIMEOUT = 5

def Dict2Uri(dic):
return urllib.urlencode(dic)

def GenUrllibReq(url, method, api_key, api_secret, post_data=None):
urlreq = None
if post_data is None:
urlreq = urllib2.Request(url)
else:
urlreq = urllib2.Request(url, post_data)
urlreq.get_method = lambda: method
auth_str = base64.b64encode('%s:%s' % (api_key, api_secret))
urlreq.add_header("Authorization", "Basic %s" % auth_str)
urlreq.add_header('Cache-Control', 'no-cache')
return urlreq

def GetApiDelUrl(cloud_name, img_type):
url = "https://api.cloudinary.com/v1_1/%s/resources/image/%s" % (cloud_name, img_type)
params = {"prefix": "http://himawari8-dl"}
url = url + "?" + Dict2Uri(params)
return url

def main(argv):
arg_idx = 1
api_key = argv[arg_idx]
arg_idx += 1
api_secret = argv[arg_idx]
arg_idx += 1
cloud_name = argv[arg_idx]

while True:
del_url = GetApiDelUrl(cloud_name, 'fetch')
urlreq = GenUrllibReq(del_url, 'DELETE', api_key, api_secret)

print "==========================="
print "Requesting %s" % (del_url)
opener = urllib2.build_opener(urllib2.HTTPSHandler(debuglevel=URLLIB_DEBUG_LEVEL))
urllib_open = opener.open(urlreq, timeout=URLLIB_TIMEOUT)
response = urllib_open.read()
print "==========================="
print "Response:"
print "%s" % (response)
print "==========================="
urllib_open.close()
print "Done Requesting"

res_json = json.loads(response)
deleted_cnt = len(res_json['deleted'])
print "Deleted %u himawari8 pics" % (deleted_cnt)
print "==========================="
if 'next_cursor' in res_json and deleted_cnt>0:
print "Due to Cloudinary limits, we're starting a new round"
else:
break

return 0

def PrintHelp(argv):
print "\t USAGE: %s [api_key] [api_secret] [cloud_name]" % (argv[0])

if __name__ == '__main__':
if len(sys.argv) < 4:
PrintHelp(sys.argv)
exit(1)
print "RUNNING main"
main(sys.argv)
print "DONE main"

EarthLiveCleanCloudinary2exe.py

# -*- coding: utf-8 -*-
# Author: Creke
# HomePage: http://blog.creke.net

from distutils.core import setup
import py2exe

setup(console=['EarthLiveCleanCloudinary.py'])