NSwag 多文档端点

NSwag multiple document endpoint

是否可以像 swashbuckle 那样拥有多个文档端点?

options.SwaggerEndpoint("/swagger/v1/swagger.json", "API v1");
options.SwaggerEndpoint("/swagger/v2/swagger.json", "API v2");

如果是,如何修饰 api 调用,使一些属于一个版本,一些属于另一个版本?

所以根据 Rico Suter 的建议,我所做的有点像这样:

ApiVersionAttribute.cs

public class ApiVersionAttribute:Attribute
    {
        private List<string> _versions = new List<string>();

        public List<string> Versions { get { return _versions; } }

        public ApiVersionAttribute(string version) {
            Versions.Add(version);
        }
    }

MyApiVersionProcessor.cs

        public string Version { get; set; }

        public MyApiVersionProcessor(string version)
        {
            this.Version = version;
        }

        public new Task<bool> ProcessAsync(OperationProcessorContext context)
        {
            bool returnValue = true;

            var versionAttributes = context.MethodInfo.GetCustomAttributes()
                .Concat(context.MethodInfo.DeclaringType.GetTypeInfo().GetCustomAttributes())
                .Where(a => a.GetType()
                                .IsAssignableTo("MapToApiVersionAttribute", TypeNameStyle.Name) 
                            || a.GetType()
                                .IsAssignableTo("ApiVersionAttribute", TypeNameStyle.Name)
                       )
                .Select(a => (dynamic)a)
                .ToArray();

            var versionAttribute = versionAttributes.FirstOrDefault();

            if (null == versionAttribute)
            {
                returnValue = false;
            }
            else
            {
                if (ObjectExtensions.HasProperty(versionAttribute, "Versions")
                    && Version.Equals(versionAttribute.Versions[0].ToString()))
                {
                    ReplaceApiVersionInPath(context.OperationDescription, versionAttribute.Versions);
                }
                else {
                    returnValue = false;
                }
            }

            return Task.FromResult(returnValue);
        }

        private void ReplaceApiVersionInPath(SwaggerOperationDescription operationDescription,
            dynamic versions)
        {
            operationDescription.Path = operationDescription.Path.Replace("{version:apiVersion}",
                versions[0].ToString());
        }
    }

在我的 Global.asax

                // NSwag
                // https://github.com/RSuter/NSwag/wiki/OwinGlobalAsax#integration                
                app.UseSwaggerUi(typeof(WebApiApplication).Assembly, new SwaggerUiSettings
                {                       
                    //TypeNameGenerator = new MyTypeNameGenerator(),
                    MiddlewareBasePath = "/swagger",
                    SwaggerRoute = "/swagger/v1/swagger.json",
                    Version = "1.0.0.0",
                    // https://github.com/RSuter/NSwag/wiki/Middlewares
                    OperationProcessors =
                    {
                        new MyApiVersionProcessor("v1")
                    },
                    PostProcess = document =>
                    {                        
                        document.BasePath = "/";
                        document.Produces
                            = new List<string> { "application/json"
                                                , "text/json"
                                                , "text/html"
                                                , "plain/text"
                                                , "application/xml"};
                        document.Consumes
                            = document.Produces;
                        document.Info.Title = "Document V1";                     
                    }

                });

                app.UseSwaggerUi(typeof(WebApiApplication).Assembly, new SwaggerUiSettings
                {
                    //TypeNameGenerator = new MyTypeNameGenerator(),
                    MiddlewareBasePath = "/swagger",
                    SwaggerRoute = "/swagger/v2/swagger.json",
                    Version = "2.0.0.0",
                    OperationProcessors =
                    {
                        new MyApiVersionProcessor("v2")
                    },
                    PostProcess = document =>
                    {
                        document.BasePath = "/";
                        document.Produces
                            = new List<string> { "application/json"
                                                , "text/json"
                                                , "text/html"};
                        document.Consumes
                            = document.Produces;
                        document.Info.Title = "Document V2";
                    }

                });

并用

装饰我的控制器方法
[ApiVersion("v2")]

[ApiVersion("v1")]

等等

您可以定义 app.UseSwagger 两次并实现一个自定义操作处理器,该处理器仅根据您的需要过滤所需的 api 操作(即在第一次调用中您应该过滤所有版本 x,在第二次调用中y 的所有版本)。

目前默认添加的ApiVersionProcessor只是将路由路径中的版本占位符替换为第一个声明的版本。我认为我们应该扩展此处理器,以便您可以排除版本并插入正确的版本。

顺便说一句:我是 NSwag 的作者。

现在有开箱即用的解决方案。我为 ASP.NET WebAPI Owin 建议它,我想它在 ASP.NET Core 中应该非常相似。

首先: 你需要安装ASP.NET API Versioning (GitHub, Nuget)

其次:您需要使用所需的路由和版本来装饰您的操作方法。例如:

[Route("api/v{version:apiVersion}/get1")]
[ApiVersion("1")]

public IEnumerable<string> Get1()
{           
   return new string[] { "value1", "value2" };
}

[Route("api/v{version:apiVersion}/get2")]
[ApiVersion("2")]

public IEnumerable<string> Get2()
{           
   return new string[] { "value1", "value2" };
}

第三:您必须将所需的配置添加到 Startup.cs 文件,以便 1) 为每个 API 版本 2) 要求 NSwag 通过 Swagger-UI

显示规范文件
public class Startup
{
    [Obsolete]
    public void Configuration(IAppBuilder app)
    {
        var config = new HttpConfiguration();

        // register versioning
        config.MapHttpAttributeRoutes(new DefaultInlineConstraintResolver
        {
            ConstraintMap = { ["apiVersion"] = typeof(ApiVersionRouteConstraint) }
        });

        config.AddApiVersioning(options =>
        {
            // reporting api versions will return the headers "api-supported-versions" and "api-deprecated-versions"
            options.ReportApiVersions = true;

            // automatically applies an api version based on the name of the defining controller's namespace
            options.Conventions.Add(new VersionByNamespaceConvention());
        });

        // generate OpenAPI Sepecification for each version and assign a route to it

        var assembly = typeof(Startup).Assembly;

        app.UseSwagger(assembly ,s =>
        {
            s.GeneratorSettings.OperationProcessors.TryGet<ApiVersionProcessor>().IncludedVersions = new[] { "1" };
            s.GeneratorSettings.SchemaType = SchemaType.OpenApi3;
            s.DocumentPath = "/swagger/v1.0.json";
        });

        app.UseSwagger(assembly , s =>
        {
            s.GeneratorSettings.OperationProcessors.TryGet<ApiVersionProcessor>().IncludedVersions = new[] { "2" };
            s.GeneratorSettings.SchemaType = SchemaType.OpenApi3;

            s.DocumentPath = "/swagger/v2.0.json";
        });

        // integrate Swagger-UI with the generated OpenAPI files generated before.
        _ = app.UseSwaggerUi3(assembly , s =>
          {
              s.SwaggerRoutes.Add(new SwaggerUi3Route("Version 1", "/swagger/v1.0.json"));
              s.SwaggerRoutes.Add(new SwaggerUi3Route("Version 2", "/swagger/v2.0.json"));

              s.GeneratorSettings.Title = "My API";
              s.GeneratorSettings.Description = "API functionalities.";
          });

        app.UseWebApi(config);

        config.EnsureInitialized();
    }
}

转到 Swagger 页面。你会看到:

  1. 右上角有一个下拉框,可以让您 select 版本
  2. 对于每个API版本,只有相关的操作方法是 列出。

我们已经 运行 解决了这个问题,但我们正计划以相反的方式解决这个问题。

  1. 卷曲 swagger 文档
  2. 翻阅它并根据标签拆分它
  3. 为每个标签创建本地 swagger 文档
  4. 运行 针对每个新创建的 swagger 文档的 nswag cli

这样我们就不必因为客户端需要其他东西而改变服务器。

(如果我们成功了会更新 :D)


编辑:所以我已经成功地将模式分解为多个模式,每个控制器一个,并通过 nswag 生成了新文件。 不是最漂亮的代码,但它可以工作。如果有人感兴趣,可以在 github 上发布它