AWS Signature V4 implementation for http4s

Provides an http4s client middleware that authenticates requests with AWS Auth Signature V4.

Getting started

To get started with sbt, simply add the following line to your build.sbt file.

libraryDependencies += "com.github.fd4s" %% "http4s-aws" % "<version>"

Example of use with S3:

  import scala.concurrent.ExecutionContext.{global => ec}
  
  import cats.implicits._
  import cats.effect._
  
  import com.amazonaws.auth.DefaultAWSCredentialsProviderChain

  import org.http4s.{Service => _, _}
  import org.http4s.Method._
  import org.http4s.client._
  import org.http4s.client.dsl.io._
  import org.http4s.client.blaze._

  import com.github.fd4s.http4s.aws._
  import com.github.fd4s.http4s.aws.model._

  implicit val cs: ContextShift[IO] = IO.contextShift(ec)

  BlazeClientBuilder[IO](ec)
    .resource
    .map { client =>
      AwsSigner(
        CredentialsProvider.fromAwsCredentialProvider[IO](
          new DefaultAWSCredentialsProviderChain()
        ),
        Region.`eu-west-1`,
        Service.s3
      )(client)
    }
    .use { client =>
      for {
        url <- IO.fromEither(Uri.fromString("hhttps://test.s3-eu-west-1.amazonaws.com/test.txt"))
        req <- GET(url)
        res <- client.expect[String](req)
      } yield res
    }
    .unsafeRunSync()

Happy coding!