VaporToOpenAPI is a Swift library which can generate output compatible with OpenAPI version 3.0.1 from Vapor code. You can use generated file in Swagger UI.
The library is based on SwiftOpenAPI.
- Set up a SwaggerUI page in your Vapor project downloading the
distfolder and placing its content in thePublic/Swaggerdirectory. - Describe all of your routes and register all controllers as described in Vapor docs. Add OpenAPI details to each route using the
route.openAPImethod. - Add a route to return a SwaggerUI index.html. Or configure your middlewares to use 'index.html' as default page.
- Add a route to return an
OpenAPIObjectinstance via theapp.routes.openAPImethod. Make sure the path of this route matches theswagger.jsonURL in your SwaggerUI page method.
All enums in your models must implement CaseIterable.
VaporToOpenAPI includes several advanced features that allow you to customize the generated OpenAPI documentation in various ways. Some of these features include:
openAPI: This method is used to add OpenAPI metadata to a single Vapor route. It takes a variety of parameters, such as a summary and description of the operation, request and response bodies, query parameters, and more.
Here's an example of how you might use it to document a POST request:
routes.post("users") { req -> EventLoopFuture<User> in
let user = try req.content.decode(User.self)
return user.save(on: req.db).map { user }
}
.openAPI(
summary: "Create User",
description: "Create a new user with the provided data",
body: .type(User.self),
response: .type(User.self)
)openAPI(on Routes): This method is used to generate an entire OpenAPI specification from your Vapor routes. It takes a variety of parameters, such as the title and description of your API, the available paths and operations, security requirements, and more.
// generate OpenAPI documentation
routes.get("Swagger", "swagger.json") { req in
req.application.routes.openAPI(
info: InfoObject(
title: "Example API",
description: "Example API description",
version: "0.1.0",
)
)
}
.excludeFromOpenAPI()response: This method is used to specify an additional response body for a Vapor route. It takes a variety of parameters, such as the status code, description, and response body type.groupedOpenAPI: These methods are used to group Vapor routes together based on OpenAPI metadata, such as tags or security requirements.
Here's an example of how you might use it to group routes with the same security requirements:
let routes = app.routes.groupedOpenAPI(auth: .apiKey())-
groupedOpenAPIResponse: These methods are used to group Vapor routes together based on common response. -
groupedOpenAPI(server:): These methods are used to group Vapor routes together based on common servers. -
excludeFromOpenAPI: This method is used to exclude a Vapor route from the generated OpenAPI specification. -
openAPINoAuth: This method is used to specify that an operation does not require any authentication. -
openAPI(custom:): These methods are used to customize a specific aspect of the OpenAPI metadata for a Vapor route, such as a specific security scheme or callback. -
operationIDandoperationRef: These properties are used to generate unique identifiers for OpenAPI operations and to create references to them in other parts of the specification.
You can customize OpenAPI schemas and parameters result by implementing OpenAPIDescriptable and OpenAPIType protocols.
OpenAPIDescriptableprotocol allows you to provide a custom description for the type and its properties.@OpenAPIAutoDescriptablemacro implements this protocol with your comments.
import SwiftOpenAPI
@OpenAPIDescriptable
/// Login request body.
struct LoginBody: Codable {
/// Username string.
let username: String
/// Password string. Encoded.
let password: String
}Manually:
struct LoginBody: Codable, OpenAPIDescriptable {
let username: String
let password: String
static var openAPIDescription: OpenAPIDescriptionType? {
OpenAPIDescription<CodingKeys>("Login request body.")
.add(for: .username, "Username string.")
.add(for: .password, "Password string. Encoded.")
}
}OpenAPITypeprotocol allows you to provide a custom schema for the type.
import SwiftOpenAPI
struct Color: Codable, OpenAPIType {
static var openAPISchema: SchemaObject {
.string(format: "hex", description: "Color in hex format")
}
}Links are one of the new features of OpenAPI 3.0. Using links, you can describe how various values returned by one operation can be used as input for other operations. To create a Link:
- create
LinkKeytype identifying some reusable parameter. - specify the type in each route using the related parameter
enum PetID: LinkKey {
}route.get("pet", use: getPet).openAPI(
links: [
Link(\Pet.id, in: .response): PetID.self
]
)
route.post("pet", ":petID", use: renamePer).openAPI(
links: [
Link("petID", in: .path): PetID.self
]
)Change url in swagger-initializer.js
window.onload = function() {
//<editor-fold desc="Changeable Configuration Block">
// the following lines will be replaced by docker/configurator, when it runs in a docker-container
var jsonURL = document.location.origin + "/Swagger/swagger.json";
window.ui = SwaggerUIBundle({
url: jsonURL,
dom_id: '#swagger-ui',
deepLinking: true,
presets: [
SwaggerUIBundle.presets.apis,
SwaggerUIStandalonePreset
],
plugins: [
SwaggerUIBundle.plugins.DownloadUrl
],
layout: "StandaloneLayout"
});
//</editor-fold>
};routes = routes
.groupedOpenAPI(auth: .basic)
.groupedOpenAPIResponse(
statusCode: 400,
body: .type(of: ErrorResponse())
)
routes.post("login") { req in
try await loginService.makeLoginRequest(
query: req.query.decode(LoginQuery.self),
content: req.content.decode(LoginRequestBody.self)
)
}
.openAPI(
summary: "Login",
description: "Login request",
query: .type(LoginQuery.self),
headers: ["X-SOME_VALUE": .string],
body: .type(LoginRequestBody.self),
response: .type(LoginResponse.self),
auth: .apiKey()
)FileMiddleware(publicDirectory: app.directory.publicDirectory, defaultFile: "index.html")// generate OpenAPI documentation
routes.get("Swagger", "swagger.json") { req in
req.application.routes.openAPI(
info: InfoObject(
title: "Example API",
description: "Example API description",
version: "0.1.0",
)
)
}
.excludeFromOpenAPI()Create a Package.swift file.
// swift-tools-version:5.9
import PackageDescription
let package = Package(
name: "SomeProject",
dependencies: [
.package(url: "https://github.com/dankinsoid/VaporToOpenAPI.git", from: "4.5.0")
],
targets: [
.target(name: "SomeProject", dependencies: ["VaporToOpenAPI"])
]
)$ swift buildContributions to VaporToOpenAPI are welcome! If you find a bug or have a feature request, please raise an issue or submit
dankinsoid, voidilov@gmail.com
VaporToOpenAPI is available under the MIT license. See the LICENSE file for more info.