Giter Club home page Giter Club logo

tapir's Introduction

tapir, or Typed API descRiptions

Join the chat at https://gitter.im/softwaremill/tapir CI Maven Central

With tapir, you can describe HTTP API endpoints as immutable Scala values. Each endpoint can contain a number of input parameters, error-output parameters, and normal-output parameters. An endpoint specification can be interpreted as:

  • a server, given the "business logic": a function, which computes output parameters based on input parameters. Currently supported:
  • a client, which is a function from input parameters to output parameters. Currently supported:
  • documentation. Currently supported:

Teaser

import sttp.tapir._
import sttp.tapir.generic.auto._
import sttp.tapir.json.circe._
import io.circe.generic.auto._

type Limit = Int
type AuthToken = String
case class BooksFromYear(genre: String, year: Int)
case class Book(title: String)


// Define an endpoint

val booksListing: PublicEndpoint[(BooksFromYear, Limit, AuthToken), String, List[Book], Any] = 
  endpoint
    .get
    .in(("books" / path[String]("genre") / path[Int]("year")).mapTo[BooksFromYear])
    .in(query[Limit]("limit").description("Maximum number of books to retrieve"))
    .in(header[AuthToken]("X-Auth-Token"))
    .errorOut(stringBody)
    .out(jsonBody[List[Book]])


// Generate OpenAPI documentation

import sttp.tapir.docs.openapi.OpenAPIDocsInterpreter
import sttp.tapir.openapi.circe.yaml._

val docs = OpenAPIDocsInterpreter().toOpenAPI(booksListing, "My Bookshop", "1.0")
println(docs.toYaml)


// Convert to akka-http Route

import sttp.tapir.server.akkahttp.AkkaHttpServerInterpreter
import akka.http.scaladsl.server.Route
import scala.concurrent.Future

def bookListingLogic(bfy: BooksFromYear,
                     limit: Limit,
                     at: AuthToken): Future[Either[String, List[Book]]] =
  Future.successful(Right(List(Book("The Sorrows of Young Werther"))))
val booksListingRoute: Route = AkkaHttpServerInterpreter()
  .toRoute(booksListing.serverLogic((bookListingLogic _).tupled))


// Convert to sttp Request

import sttp.tapir.client.sttp.SttpClientInterpreter
import sttp.client3._

val booksListingRequest: Request[DecodeResult[Either[String, List[Book]]], Any] = 
  SttpClientInterpreter()
    .toRequest(booksListing, Some(uri"http://localhost:8080"))
    .apply((BooksFromYear("SF", 2016), 20, "xyz-abc-123"))

Documentation

tapir documentation is available at tapir.softwaremill.com.

Quickstart with sbt

Add the following dependency:

"com.softwaremill.sttp.tapir" %% "tapir-core" % "0.20.0-M2"

You'll need partial unification enabled in the compiler (alternatively, you'll need to manually provide type arguments in some cases):

scalacOptions += "-Ypartial-unification"

Then, import:

import sttp.tapir._

And finally, type endpoint. and see where auto-complete gets you!


Sidenote for scala 2.12.4 and higher: if you encounter an issue with compiling your project because of a StackOverflowException related to this scala bug, please increase your stack memory. Example:

sbt -J-Xss4M clean compile

Other sttp projects

sttp is a family of Scala HTTP-related projects, and currently includes:

  • sttp client: the Scala HTTP client you always wanted!
  • sttp tapir: this project
  • sttp model: simple HTTP model classes (used by client & tapir)

Contributing

Tapir is an early stage project. Everything might change. All suggestions welcome :)

See the list of issues and pick one! Or report your own.

If you are having doubts on the why or how something works, don't hesitate to ask a question on gitter or via github. This probably means that the documentation, scaladocs or code is unclear and be improved for the benefit of all.

Testing locally

The JS tests use Gecko instead of Chrome, although this causes another problem: out of memory when running JS tests for multiple modules. Work-arounds:

  • run only JVM tests using testJVM
  • test single JS projects
  • use CI (GitHub Actions) to test all projects - the .github/workflows/ci.yml enumerates them one by one

You can test only server/client/doc/other projects using testServers, testClients, testDocs and testOther.

Commercial Support

We offer commercial support for tapir and related technologies, as well as development services. Contact us to learn more about our offer!

Copyright

Copyright (C) 2018-2021 SoftwareMill https://softwaremill.com.

tapir's People

Contributors

adamw avatar aesteve avatar bbartosz avatar danielleontiev avatar danilbykov avatar dkarwacki avatar dpfeiffer avatar dvgica avatar fgrutsch avatar forthy avatar ghostbuster91 avatar ghostdogpr avatar hamnis avatar hejfelix avatar justinhj avatar kciesielski avatar kubinio123 avatar majk-p avatar matwojcik avatar mbore avatar mergify[bot] avatar micossow avatar mszczygiel avatar pewniak747 avatar pierscin avatar sameerparekh avatar sbrunk avatar scala-steward avatar slabiakt avatar softwaremill-ci avatar

Watchers

 avatar

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    ๐Ÿ–– Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. ๐Ÿ“Š๐Ÿ“ˆ๐ŸŽ‰

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google โค๏ธ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.