Swagger Inspector is an easy to use developer tool to quickly execute any API request, validate its responses and generate a corresponding OpenAPI definition. Use Swagger Inspector to quickly generate your OAS-based documentation for existing REST APIs by calling each end point and using the associated response to generate OAS-compliant documentation, or string together a series of calls to generate a full OAS document for multiple API endpoints.
REST API Documentation Using OpenAPI (Swagger)
Note that when using viewsets the basic docstring is used for all generated views. To provide descriptions for each view, such as for the list and retrieve views, use docstring sections as described in Schemas as documentation: Examples.
So, by using OpenAPI in our Web API projects, we can automatically generate our documentation directly from or source code by maintaining the data annotations, XML comments and examples based on our actual data transfer classes. The two main OpenAPI implementations for .NET are Swashbuckle and NSwag. In the examples of the following sections, we will use the Swashbuckle tools.
The structure of the extracted XML documentation is defined in C# by using XML documentation comments. The documentation comments support several XML tags, such as summary, return description, exceptions, list of information, etc. In this article, we will use some of them. For more information about the recommended XML tags for C#, read Wagner B., et al. (2021) article.
The Swashbuckle.AspNetCore.Filters NuGet package provides several functionalities that significantly improve our API documentation. For example, we can create valuable request and response examples with valid data, including security requirements, custom request and response headers, etc. In addition, we can manually test our API using these features just by using the Swagger UI without modifying the auto-generated request.
If we use System.ComponentModel.DataAnnotations attributes to validate our DTOs, then the validations are recognized and automatically included in the API documentation. However, we should perform the following steps if we are using FluentValidation for our DTOs.
springdoc-openapi java library helps to automate the generation of API documentation using spring boot projects.springdoc-openapi works by examining an application at runtime to infer API semantics based on spring configurations, class structure and various annotations.
The support for Spring Hateoas is available using the dependency springdoc-openapi-hateoas.The projects that use Spring Hateoas should combine this dependency with the springdoc-openapi-ui dependency.This dependency enables the support of Spring Hateoas format.
The projects that use spring-data-rest can add the following dependency in combination with the springdoc-openapi-ui dependency.This dependency enables the support of spring-boot-starter-data-rest types like: @RepositoryRestResource and QuerydslPredicate annotations.
All the documentations filled using @RouterOperation, might be completed by the router function data.For that, @RouterOperation fields must help identify uniquely the concerned route.springdoc-openpi scans for a unique route related to a @RouterOperation annotation, using on the following criteria:
The whole idea of springdoc-openapi is to get your documentation the closest to the code, with minimal code changes.If the code contains @Deprecated, sprindoc-openapi will consider its schema as Deprecated as well.If you want to declare a field on swagger as non deprecated, even with the java code, the field contains @Depreacted,You can use the following property that is available since release v1.4.3:
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
We will be using an OpenAPI with the Express library express-openapi. Note that this library provides advanced functionalities (response validation, authentication, middleware setup...) beyond the scope of this post.
Swagger (backed by companies like Google, IBM, Microsoft) does this same job of filling the gap of common documentation style. In this tutorial, we will learn to use Swagger to generate REST API docs using swagger 2 annotations.
As a code example in this article we will use a typical microservices architecture built with Spring Cloud. It consists of Spring Cloud Config Server, Eureka discovery, and Spring Cloud Gateway as API gateway. We also have three microservices, which expose the REST API and are hidden behind the gateway for an external client. Each of them is exposing OpenAPI documentation that may be accessed on the gateway using Swagger UI. The repository with source code is available on GitHub: -spring-microservices-new.git. This repository has been used as an example in another article, so it contains code not only for Springdoc library demo. The following picture shows the architecture of our system.
The first good news related to the Springdoc OpenAPI library is that it may exist together with the SpringFox library without any conflicts. This may simplify your migration into a new tool if anybody is using your Swagger documentation, for example for code generation of contract tests. To enable Springdoc for standard Spring MVC based application you need to include the following dependency into Maven pom.xml.
The developers who consume our APIs are usually more interested in what it returns- specifically the response types and error codes. Hence it is very important to describe our response types. These are denoted using XML comments & data annotations.
Documentation is the most visible OpenAPI output, but there are numerous other applications. Other OpenAPI examples include setting up testing such as continuous integration using the OpenAPI file that generated the documentation.
In fact, tools like swaggo/swag may offer the perfect balance here. Youwrite your server code using whatever framework/technique you like, and addmagic comments to describe your REST API. The tool then generates the OpenAPIspec from these comments, and you can generate documentation or anything elsefrom that spec. There's the added benefit of keeping the spec source of truth(the magic comments) as close as possible to the source code implementing it -always a good practice in SW engineering.
One of the main reasons for using OpenAPI specification documentation is to generate a reference that helps build clients libraries in dozens of languages, generate server stubs, use projects to verify your conformance to create samples.
Introduces the interactive documentation tool for the GitLab API.About the OpenAPI specificationThe OpenAPI specification (formerly called Swagger) defines astandard, language-agnostic interface to RESTful APIs. OpenAPI definition files are written in theYAML format, which is automatically rendered by the GitLab browser into a more human-readable interface.For general information about the GitLab APIs, see API Docs.OverviewThe interactive API documentation toolallows API testing directly on the GitLab.com website. Only a few of the available endpoints aredocumented with the OpenAPI spec, but the current list demonstrates the functionality of the tool.Endpoint parametersWhen you expand an endpoint listing, you see a description, input parameters (if required),and example server responses. Some parameters include a default or a list of allowed values.Starting an interactive sessionA Personal access token (PAT) is one way tostart an interactive session. To do this, select Authorize from the main page, and adialog box prompts you to enter your PAT, which is valid for the current web session.To test the endpoint, first select Try it out on the endpoint definition page. Input the parametersas required, then select Execute. In the following example, we executed a request for the versionendpoint (no parameters required). The tool shows the curl command and URL of the request, followedby the server responses that are returned. You can create new responses by editing the relevant parametersand then select Execute once again. Help & feedbackDocsEdit this pageto fix an error or add an improvement in a merge request.
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Hi I'm using swagger-jsdoc library. Wanted to know if Visual Studio code offers any extensions for intellisense? There is an extension named swagger-jsdoc but the syntax for post request is quite outdated according to openapi 3.0.0 and hence not able to get automatic intellisense for requestBody..It still uses ;-
parameters:
Now you will add an info object to your documentation using the three most-used fields: title, description, and version. In the Insomnia app, add the following YAML code to Design tab editor:
As a next step, try to document the other routes that JSONPlaceholder offers (e.g., /users), or try this out with your own API. You can go forward from here by using tools like Docasaurus to add documentation that explains and guides the user. Remember to keep your API Spec DRY and easy to read so you can make changes to it in the future. Insomnia also has other features, like the ability to test and debug your API, so be sure to check those out by reading the documentation.
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