This repo is based on https://github.com/aws-samples/amazon-s3-presigned-urls-aws-sam

This example application shows how to upload objects to S3 directly from your end-user application using Signed URLs.

To learn more about how this application works, see the AWS Compute Blog post: https://aws.amazon.com/blogs/compute/uploading-to-amazon-s3-directly-from-a-web-or-mobile-application/

Important: this application uses various AWS services and there are costs associated with these services after the Free Tier usage - please see the AWS Pricing page for details. You are responsible for any AWS costs incurred. No warranty is implied in this example.

We built our project based on the above example, added a S3 triggerred lambda function that executes whenever an object is created in the S3 bucket, and another function to report results.

.
├── README.MD                   <-- This instructions file
├── fetchScore                  <-- Source code for the serverless backend to fetch an item from DynamoDB table which stores the scores for uploaded videos
├── getSignedURL                <-- Source code for the serverless backend to get a presigned URL for upload
├── getPredScore                <-- Source code for the serverless backend to download object from S3 and process

• AWS CLI already configured with Administrator permission
• AWS SAM CLI installed - minimum version 0.48.
• python3.8

1. Create an AWS account if you do not already have one and login.

2. Clone the repo onto your local development machine using git clone.

There are two SAM templates available - one provides an open API, the other uses an authorizer. From the command line, deploy the chosen SAM template:

cd .. 
sam deploy --guided

When prompted for parameters, enter:

• Stack Name: AQAUploadProcess
• AWS Region: us-west-2
• Accept all other defaults. Except:

UploadRequestFunction may not have authorization defined, Is this okay? [y/N]: y

This takes several minutes to deploy. At the end of the deployment, note the output values, as you need these later.

• The APIendpoint value is important - it looks like https://ab123345677.execute-api.us-west-2.amazonaws.com.
• The upload URL is your endpoint with the /uploads route added - for example: https://ab123345677.execute-api.us-west-2.amazonaws.com/uploads.

1. First, copy the API endpoint from the output of the deployment. https://glxlp92kil.execute-api.us-west-2.amazonaws.com/uploads
2. In the Postman interface, paste the API endpoint into the box labeled Enter request URL, select GET, add video as binary raw file.
3. Send
4. (For uploading a file to S3) In the Postman interface, open another tab, paste the presigned URL get from step 3, select PUT, add the same video as binary raw file as in step 2, send