![]() In the first case, the plugin is controlled by a YAML configuration file named openapi-generator-config.yaml that must exist in the target source directory along with the OpenAPI document in JSON or YAML format. The generator can be run in two ways: either as a Swift Package Manager plugin, integrated in the build process, or manually through a CLI. Currently, the Swift OpenAPI Generator can be used with a few existing transport frameworks, including URLSession from iOS own Foundation framework, HTTPClient from AsyncHTTPClient, Vapor, and Hummingbird.Īll protocols and types used in the Swift OpenAPI Generator are defined in its companion project Swift OpenAPI Runtime, which is relied upon by generated client and server code. The code Swift OpenAPI Generator generates is not tied to a specific HTTP framework but relies on a generic ClientTransport or ServerTransport type, which any compatible HTTP framework should implement to be usable with the generator. Anyway, developers can implement those features in a middleware that conforms to the ClientMiddleware or ServerMiddleware protocols to be reusable in other projects based on Swift OpenAPI Generator. This kind of logic is usually too strictly associated with the business logic to allow for a general abstraction. The generated code does not cover authentication, logging, or retrying. Server-side, the package generates a registerHandlers method belonging to the APIProtocol to register one handler for each operation in the protocol. Along with the protocol definition, a Client type implementing it is also generated for use on the client side. For example, for a simple GreetingService supporting HTTP GET requests at the /greet endpoint, the APIProtocol would contain a getGreeting method. Swift OpenAPI Generator generates type-safe representations of each operation's input and output as well as the required network calls to deal with sending requests and processing responses on the client side and server-side stubs to delegate request processing to handlers.īoth the client and the server code are based on a generated APIProtocol type that contains one method for each OpenAPI operation. Apple has introduced a new open source package, the Swift OpenAPI Generator, aimed at generating the code required to handle client/server communication through an HTTP API based on its OpenAPI document.
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