Ktor OpenAPI Generator

The Ktor OpenAPI Generator is a library to automatically generate the descriptor as you route your ktor application.

Ktor OpenAPI Generator is:

• Modular
• Strongly typed
• Explicit

Currently Supported:

• Authentication interoperability with strongly typed Principal (OAuth only, see TestServer in tests)
• Content Negotiation interoperability (see TestServer in tests)
• Custom response codes (as parameter in @Response)
• Automatic and custom content Type routing and parsing (see com.papsign.ktor.openapigen.content.type, Binary Parser and default JSON parser (that uses the ktor implicit parsing/serializing))
• Exception handling (use .throws(ex) {} in the routes with an APIException object) with Status pages interop (with .withAPI in the StatusPages configuration)
• tags (.tag(tag) {} in route with a tag object, currently must be an enum, but may be subject to change)
• Spec compliant Parameter Parsing (see basic example)
• Legacy Polymorphism with use of @DiscriminatorAnnotation() attribute and sealed classes

Extra Features:

• Includes Swagger-UI (enabled by default, can be managed in the install(OpenAPIGen) { ... } section)

Examples

Take a look at a few examples

Who is using it?

• https://github.com/SerVB/e-shop

And others... (add your name above)

Installation

Gradle

Step 1. Add the JitPack repository to your build file:

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

Step 2. Add the dependency:

dependencies {
        implementation 'com.github.papsign:Ktor-OpenAPI-Generator:-SNAPSHOT'
}

Git Submodule

Install the submodule:

git submodule add https://github.com/papsign/Ktor-OpenAPI-Generator.git openapigen

Declare the folder in settings.gradle:

...
include 'openapigen'

Declare the dependency in the main build.gradle

apply plugin: 'kotlin'

...

dependencies {
    compile project(":openapigen")
    ...
}