Download S3 File in Salesforce using AWS Signature Version 4.0

We are required to store a lot of business files in Salesforce Orgs. We can use Salesforce storage for storing these files but it becomes expensive for larger storage. Amazon S3 and Salesforce Integration can dramatically expand our CRM capabilities by delivering a scalable, secure, and efficient external storage option. This post will provide a step-by-step guide to downloading stored files from the S3 Server.

Check out our other post to upload files to the S3 Server.

Use Cases for Amazon S3 in Salesforce

Document and File Storage

Rather than using Salesforce’s more limited and pricey storage, store huge files and documents in S3. This is perfect for attaching PDFs, photos, movies, and other media items to your Salesforce entries.

Backup and Archiving

Use S3 to backup and archive Salesforce data. This provides data durability and accessibility while successfully controlling costs.

Data Lakes

For organisations that utilise Salesforce for customer data and big data analytics, S3 Server can be used to consume, store, and analyse massive amounts of structured and unstructured data.

Steps for downloading S3 files in Salesforce

1. Create a named credential for AWS
2. Create an apex class to download file content
3. Create an LWC component to download on the client side
4. Call LWC component on record action

1. Create a named credential for AWS

Follow the steps in the section Create a named credential for AWS Credential from our other blog Use Named Credential to Upload File in S3.

2. Create an apex class to download file content

Once we created a named credential named S3Server from the above steps. Let us create a class that will download file content from AWS S3.

FileStore is a Salesforce object that holds S3-related information for uploaded files. This object has fields for storing S3 URL, file extension and file name.

3. Create an LWC component to download on the client side

Create an LWC component that will get file data from Apex and show that in different browsers for saving/downloading it.

It will download the file when the Download File action is clicked on the file store record.

4. Call LWC component on record action

Once the LWC component is ready, create an action for the LWC component on the file store record object.

Add that action to the page layout. It will add a download file button on the record page.

Related Posts:-

Use Named Credential to Upload File in S3

View S3 File in Lightning Web Component

Authenticating Requests (AWS Signature Version 4)

Need Help?

Need some kind of help in implementing this feature, connect on my LinkedIn profile Dhanik Lal Sahni.