TIL #4: Downloading a zip from S3 to local directory using AWS CLI

Today, I had a need to download a zip file from S3 . I quickly learnt that AWS CLI can do the job. The AWS CLI has aws s3 cp command that can be used to download a zip file from Amazon S3 to local directory as shown below.

 $ aws s3 cp s3://my_bucket/myzip.zip ./

If you want to download all files from a S3 bucket recursively then you can use the following command

$ aws s3 cp s3://my_bucket/  ./ -- recursive

You can specify your AWS profile using the profile option shown below.

$ aws s3 cp s3://my_bucket/myzip.zip ./ -- profile test

To download all the files from a folder you can use following command:

$ aws s3 cp s3://my_bucket/my_folder  ./ -- recursive

You can also use include and exclude options to filter files based on wildcards. For example, let’s suppose you only want to download files with zip extension from a S3 bucket my_bucket then you can use the following command.

$ aws s3 cp s3://pcl-caps ./ --recursive --exclude "*" --include "*.zip"

There is another great option dryrun that you can use to see the actions that will be performed without running the command. In the above command, if we add —dryrun flag then we can see which all files will be downloaded to local directory.

$ aws s3 cp s3://pcl-caps ./ --recursive --exclude "*" --include "*.zip" --dryrun

Hands-on guide for building Serverless applications

Yesterday, I released hands-on guide to building Serverless applications using AWS Lambda and Serverless framework. The guide is open-source and available on Github. Checkout the guide and please give feedback.

Serverless is an overloaded word. Serverless means different things depending on the context. It could mean using third party managed services like Firebase, or it could mean an event driven architecture style or it could mean next generation compute service offered by cloud providers or it could mean a framework to build Serverless applications. This series will start with an introduction to Serverless compute and architecture. Once we learned the basics, we will start developing application in a step by manner.

Read more https://github.com/shekhargulati/hands-on-serverless-guide.