You're reading from Building Serverless Architectures Unleash the power of AWS Lambdas for your applications

Product type Paperback

Published in Jul 2017

Publisher Packt

ISBN-13 9781787129191

Length 242 pages

Edition 1st Edition

Languages

Java

Tools

AWS

Concepts

Serverless

Author (1):

Cagatay Gurturk

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Table of Contents (10) Chapters

Preface

1. Getting Started with Serverless FREE CHAPTER

2. Infrastructure as a Code

3. Hello Internet

4. Applying Enterprise Patterns

5. Persisting Data

6. Building Supporting Services

7. Searching Data

8. Monitoring, Logging, and Security

9. Lambda Framework

Letting users upload to S3

As the second part of this picture-resizing system, we need to create an endpoint that will let our users upload their pictures to the S3 bucket. As we explained at the beginning, there is no need to develop any custom software for that because API Gateway, besides executing Lambda functions, also lets us expose some of AWS APIs to public the internet. It means, we can let API Gateway clients use the S3 upload API on our behalf.

How can we configure this? First, we have to create a new role that can be assumed by API Gateway and only grants s3:PutObject and s3:PutObjectAcl permissions to our profile pictures bucket. Let's add this permission to our Resources section of the CloudFormation template:

"ApiGatewayProxyRole": { 
  "Type": "AWS::IAM::Role", 
    "Properties": { 
      "AssumeRolePolicyDocument...

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Authors (1)

Gurturk

Cagatay Gurturk is a software engineer, internet enterpreneur, and cloud enthusiast. After finishing his studies at the Istanbul Technical University, he continued his education to get a master's degree in computer engineering at Bahcesehir University. In 2004, in his freshman year at the college, he co-founded Instela, which quickly became one of the most well-known internet platforms in Turkey, with millions of visitors per month. Being the technical co-founder of Instela, he gained experience of running web platforms at scale and was also introduced to the world of cloud computing. After long years as an internet enterpreneur in Istanbul and Barcelona, he continued his career in different companies, where he delivered software running on cloud infrastructures, especially on AWS. He authored some open source projects related to AWS as well. He currently works at eBay as a software development manager, and he is also a certified AWS Solutions Architect.

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