Overview

S3 Presigned URL microservice prototype written in Go. Using AWS SDK in Go.

Intro

Returns the presigned URL for downalod with 15 mins expiration. Service listen to 8082 (changeable)

Effectively returns same as “aws s3 presign bucket_name/key --expires-in 60*15”

Installation

go run main.go

or: go build main.go

./main &

URL pattern

curl "http://localhost:8082/presign?s3path={s3path}

{s3path} as “bucket_name/key” (see ‘/‘ delimiter)

Example:

localhost:8082/presign?s3path=ejoliet-dummy/hello.html

encode value

Go to S3 bucket, select the file to get the URL presigned, copy URI, remove the 's3://' part, then go here to encode it:

example:

roman-airflow-demo/airflow-dev/logs/dag_id=01_hello_world/run_id=manual__2023-05-18T01:08:39.382762+00:00/task_id=hello_world_bash_operator/attempt=1.log

becomes

roman-airflow-demo%2Fairflow-dev%2Flogs%2Fdag_id%3D01_hello_world%2Frun_id%3Dmanual__2023-05-18T01%3A08%3A39.382762%2B00%3A00%2Ftask_id%3Dhello_world_bash_operator%2Fattempt%3D1.log

Use this for the value of s3path.

AWS deployment

See CloudFormation stack for deployment.

aws cloudformation create-stack --stack-name S3PresignedURL --template-body file://./server-stack.yaml