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Update AMP Content
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| #!/usr/bin/env python3 | |
| import base64 | |
| import os | |
| import time | |
| from OpenSSL import crypto | |
| import requests | |
| from requests.packages.urllib3 import exceptions as requests_exceptions | |
| CACHE_DOMAIN = 'cdn.ampproject.org' | |
| CURRENT_DIRECTORY = os.path.abspath(os.path.dirname(__file__)) | |
| PRIVATE_KEY_FILENAME = 'private-key-amp-cache.pem' | |
| PRIVATE_KEY_PATH = os.path.abspath(os.path.join( | |
| CURRENT_DIRECTORY, PRIVATE_KEY_FILENAME)) | |
| """ | |
| Invalidates the AMP cache for a given URL following the guidelines at | |
| https://developers.google.com/amp/cache/update-cache | |
| ============= | |
| Prerequisites | |
| ============= | |
| 1. Create your private and public key. | |
| 2. Update the private key variable filename defined above under PRIVATE_KEY_FILENAME if needed (relative path) | |
| 3. Publish the public key to your website at /.well-known/amphtml/apikey.pub | |
| 4. install the requests and OpenSSL libraries for Python 3 | |
| ======= | |
| Running | |
| ======= | |
| To run this script:: | |
| ./update_amp_cache.py | |
| """ | |
| class CacheUpdate(object): | |
| _signature = None | |
| _timestamp = None | |
| _update_cache_url = None | |
| def __init__(self, website_url): | |
| self.website_url = website_url | |
| self._cdn_url = 'https://{}/c/s/{}'.format( | |
| CACHE_DOMAIN, self.website_url) | |
| requests.packages.urllib3.disable_warnings( | |
| requests_exceptions.InsecureRequestWarning) | |
| def run(self): | |
| self._timestamp = int(time.time()) | |
| self._update_cache_url = ( | |
| "/update-cache/c/s/{}?amp_action=flush&_ts={}".format( | |
| self.website_url, self._timestamp)) | |
| self.calculate_signature() | |
| self.send_request() | |
| def calculate_signature(self): | |
| if not os.path.exists(PRIVATE_KEY_PATH): | |
| print 'Private Key Not Found' | |
| key_file = open(PRIVATE_KEY_PATH, "r") | |
| key = key_file.read() | |
| key_file.close() | |
| pkey = crypto.load_privatekey(crypto.FILETYPE_PEM, key) | |
| sign = crypto.sign(pkey, self._update_cache_url, "sha256") | |
| self._signature = base64.urlsafe_b64encode(sign).decode("utf-8") | |
| def send_request(self): | |
| domain = self.website_url.partition('/')[0] | |
| prefix = domain.replace('.', '-') | |
| amp_base_url = '{}.{}'.format(prefix, CACHE_DOMAIN) | |
| url = "https://{}{}&_url_signature={}".format( | |
| amp_base_url, self._update_cache_url, self._signature) | |
| r = requests.get(url, verify=False) | |
| if r.status_code == 200: | |
| print("Successfully updated cached AMP content for " | |
| "https://{} at {}".format(self.website_url, self._cdn_url)) | |
| else: | |
| print("Cache update failed. Response code: {}".format( | |
| r.status_code)) | |
| print(r.content) | |
| if __name__=="__main__": | |
| url_input = input("Website url of which AMP cache should be updated " | |
| "(e.g. 'www.mysite.com/my-article/'): ") | |
| validated_url_input = url_input.strip('https://') | |
| cacheUpdate = CacheUpdate(validated_url_input) | |
| cacheUpdate.run() |
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