Introduction

WebApi is a Haskell library that lets you

• Write web API services
• Quickly build Haskell client for existing API services
• Generate API console interface for your web API (coming soon)
• Generate a mock server that can mock your responses and requests

WebApi is built with WAI. It makes use of the strong type system of haskell which lets to

• Create a type safe routing system.
• Enable type safe generation of links.
• Specify a contract for the APIs.
• Auto serialization and deserialization of the request and response based on api contract.
• Write handlers which respect the contract.

WebApi is available on github . Contributions and feedback are most welcome!

Contents:

• Introduction
• 1. Installation
• 2. Quick start
  • 2.1. Contract
  • 2.2. Server implementation
• 3. Routing
  • 3.1. Routes as types
  • 3.2. More examples
• 4. Server implementation
  • 4.1. Writing WebApiServer instance
  • 4.2. Writing instances for your handlers
  • 4.3. Doing more with your handler monad
• 5. Content Serialization / Deserialization
  • 5.1. Nested Types
  • 5.2. Writing Custom instances
  • 5.3. Content Types
• 6. Error Handling
• 7. Building haskell client for third-party API
• 8. Mocking Data