S3 File Upload Serverless

AWS Lambda function to generate Pre-Signed PUT URLs for AWS S3, written in Clojure.

This repository is also the basis for my first Blogpost in the Series Serverless Quicktips.

Usage

curl $HOST/upload -X POST \
    -d "{\"fileName\": \"hello-world.txt\"}" \
    -H "Content-Type: application/json" \
    -H "Accept: application/json"

Response:

{
    "fileName": "hello-world.txt",
    "key": "79be4015-d3d8-43e2-8e90-ed9c84f41658.txt",
    "expires": 1546300799,
    "url": "https://..."
}

The expires attribute contains a UNIX timestamp, indicating when the URL will expire to work.

Configuration

Create a file called src/main/resourcey/config.edn (see the example file).

{:bucket "my-temporary-bucket"
 :region "us-east-1"
 :url-expirery-time 7200}

Attribute	Type	Comment
bucket	AWS S3 Bucket Name	The bucket to generate the Pre-Signd Upload URLs for.
region	AWS Region ID	ID of the region the bucket is placed in.
url-expirery-time	Natural Number / Seconds	The number of seconds a Pre-Signed URL will be valid. By default 1 hour.