Invalidation AWS CDN Using Boto3

• This post describe how to remove files from CloudFront edge caches before it expires using python boto3

• To invalidate files, specify either the path for individual files or a path that ends with the * wildcard, which might apply to one file or to many, as shown in the following examples:

  • /images/image1.jpg
  • /images/image*
  • /images/*

• Using python boto3 invalidatecdn_demo.py

import boto3
import time
import sys

""" Invalidate CDN at s3://static/demo/src """
DISTRIBUTION_ID = 'A1AA1AA11A11AA'

client = boto3.client('cloudfront')

def create_invalidation():
res = client.create_invalidation(
DistributionId=DISTRIBUTION_ID,
InvalidationBatch={
'Paths': {
'Quantity': 1,
'Items': [
'/demo/src/*'
]
},
'CallerReference': str(time.time()).replace(".", "")
}
)
invalidation_id = res['Invalidation']['Id']
return invalidation_id

def get_invalidation_status(inval_id):
res = client.get_invalidation(
DistributionId=DISTRIBUTION_ID,
Id=inval_id
)
return res['Invalidation']['Status']

def run():
the_id = create_invalidation()
count = 0
while True:
status = get_invalidation_status(the_id)
if status == 'Completed':
print("Completed, id: {}".format(the_id))
break
elif count < 10:
count += 1
time.sleep(30)
else:
print("Timeout, please check CDN")
sys.exit(1)

if name == 'main':
run()

- Run

~()⚡ $ python invalidatecdn_demo.py
Completed, id: I1CLODB5ZXEQUK

- Result
 - In progress
![Alt Text](https://dev-to-uploads.s3.amazonaws.com/i/b0f6fgc459dkvc1741hh.png)

 - Complete
![Alt Text](https://dev-to-uploads.s3.amazonaws.com/i/f62t39vkyjr1opqhnoxt.png)

- Ref: https://github.com/vumdao/invalidate-cdn/tree/master