AWS, Cloud Computing

5 Mins Read

A Comprehensive Guide to Sending Binary Data to an Amazon S3 Bucket

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In today’s dynamic cloud computing landscape, Amazon Simple Storage Service (S3) stands as a cornerstone, offering unparalleled data storage and retrieval flexibility. This comprehensive guide delves into an advanced facet of Amazon S3 utilization—sending binary data to an Amazon S3 bucket using the robust AWS REST API. As businesses increasingly rely on cloud-based solutions, mastering the integration of AWS services becomes imperative. This tutorial assumes a foundational understanding of Amazon S3 and guides users through the process of employing the REST API for efficient binary data transfers.


AWS Account: Ensure you have an AWS account and the credentials to access the Amazon S3 service.

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Step-by-Step Guide

Step 1: Set Up your Amazon S3 Bucket

The initial step involves navigating the AWS Management Console and accessing the Amazon S3 service. You can create a new Amazon S3 bucket or leverage an existing one. Take note of crucial information, such as your bucket name and the AWS region in which it resides.


Step 2: Set Up AWS IAM Role for Rest API

Facilitating the REST API and the Amazon S3 bucket interaction requires creating an Identity and Access Management (IAM) Role for Amazon API Gateway.

Create a Role for Amazon API Gateway: Begin by crafting a dedicated AWS IAM Role explicitly for Amazon API Gateway, ensuring it has the necessary permissions to perform actions within your AWS environment.


Attach Policy for Amazon S3 Access: Attach a policy to this Role, specifically granting permissions for the PutObject action in the Amazon S3 bucket. This ensures that Amazon API Gateway has the necessary privileges to interact seamlessly with the Amazon S3 service.


Step 3: Set Up Rest API

Building the REST API involves a sequence of actions within the API Gateway:

Create a new Rest API in Amazon API Gateway.


On Clicking Actions, Create a resource name bucket for Amazon S3 bucket.


On Clicking Actions, create another resource name for the file to be uploaded to Amazon S3.


Now, create a put method by clicking action to put an object in Amazon S3.


Put the Location of the Amazon S3 bucket, which we noted earlier.

Place the ARN of the AWS IAM role, which we created earlier in the execution role, and make changes as below.


After saving the configuration, you will see the flow below.


Step 4: Configure Rest API for sending Binary Data to Amazon S3 Bucket

Fine-tune the integration by editing the path parameters in the Integration Request section. Additionally, enhance the binary media types settings under Resources to ensure compatibility.

Click on Integration Request present in the flow and edit the path parameters as below.


Go to settings under the Resources section, add binary media types as below, and save the settings.


Go to resources and deploy the API by clicking on Action.



Deploy the API by navigating to the Resources section and clicking on Action. Once deployed, copy the invoke URL for HTTP PUT requests.

Step 5: Testing Set Up   

  1. Enter the testing phase by utilizing Postman:
  2. Create a PUT HTTP request.
  3. Attach a binary file to the request.
  4. Paste the previously copied URL, specifying the bucket name and desired filename.
  5. Send the request, and upon success, the file will be seamlessly reflected in the Amazon S3 bucket.


As an indicator of successful file transfer, the response in the body section will display ‘1.’



In traversing the landscape of Amazon S3 and REST API integration, this comprehensive guide serves as a beacon for those navigating the complexities of cloud computing. This guide demystifies the technical intricacies and emphasizes the broader implications of mastering such integrations within the Amazon Web Services ecosystem.

The journey commenced with establishing a foundational prerequisite—an active AWS account. From there, users were guided through the meticulous setup of an Amazon S3 bucket, a fundamental yet critical component in the AWS cloud infrastructure. Understanding AWS IAM Role creation for Amazon API Gateway underscored the importance of access management in ensuring a secure and controlled data transfer environment. The pivotal role of Amazon API Gateway itself became evident—a gateway not just in name but in function, orchestrating the seamless flow of data between external requests and the Amazon S3 bucket.

In a broader context, as cloud computing continues to evolve, those proficient in orchestrating seamless interactions between services like Amazon S3 and Amazon API Gateway stand at the forefront of innovation. Embrace this guide not merely as a set of instructions but as a gateway to unlocking the vast capabilities of AWS, guiding you toward a future where the cloud is not just a tool but a transformative force in your digital journey.

Drop a query if you have any questions regarding Amazon S3 and REST API and we will get back to you quickly.

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1. Why is sending binary data to an Amazon S3 bucket using the REST API necessary?

ANS: – Amazon S3 is a powerful storage service, and using the REST API enables programmatic interaction with Amazon S3 buckets. Sending binary data is essential for scenarios where you need to upload files, images, or any non-textual data to your Amazon S3 bucket. 

2. What prerequisites are necessary to follow this guide?

ANS: – You need an active AWS account with the necessary Amazon S3 access credentials. Basic familiarity with Amazon S3 concepts and the AWS Management Console is also assumed. 

WRITTEN BY Rajveer Singh Chouhan

Rajveer Singh Chouhan works as a Research Associate at CloudThat. He has been learning and gaining practical experience in AWS and Azure. Rajveer is also passionate about continuously expanding his skill set and knowledge base by actively seeking opportunities to learn new skills. Rajveer regularly reads blogs and articles related to various programming languages, technologies, and industry trends to stay up to date with the latest developments in the field.



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