使用 Swashbuckle Aspnetcore 将 `host`、`basePath` 和 `schemes` 添加到 swagger.json

Question

我正在使用官方文档逐步方法来配置 Swagger UI 并在我的 ASP.NET 核心 API 应用程序中生成 Swagger JSON 文件。

Get started with Swashbuckle and ASP.NET Core

如果我查看生成的 swagger.json 文件 - 它缺少三个重要属性 host、basePath 和 schemes

请帮助我了解我可以添加哪些代码，以便生成的 swagger.json 将具有以下提到的属性/值。

这是一个理想的 swagger.json - 如果我遵循应用程序中的文档代码，请注意 host、basePath 和 schemes 值

{
  "swagger": "2.0",
  "info": {
    "version": "v1",
    "title": "Demo API Title"
  },
  "host": "some-url-that-is-hosted-on-azure.azurewebsites.net",
  "basePath": "/api",
  "schemes": ["https"],
  "paths": {
    "/Account/Test": {
      "post": {
        "tags": [
          "Admin"
        ],
        "summary": "Account test method - POST",
        "operationId": "AccountTest",
        "consumes": [],
        "produces": [
          "text/plain",
          "application/json",
          "text/json"
        ],
        "parameters": [],
        "responses": {
          "200": {
            "description": "Success",
            "schema": {
              "type": "boolean"
            }
          }
        }
      }
    }
  },
  "definitions": {
    "NumberSearchResult": {
      "type": "object",
      "properties": {
        "number": {
          "type": "string"
        },
        "location": {
          "type": "string"
        }
      }
    }
  },
  "securityDefinitions": {
    "Bearer": {
      "name": "Authorization",
      "in": "header",
      "type": "apiKey",
      "description": "Authorization. Example: \"Authorization: Bearer {token}\""
    }
  },
  "security": [
    {
      "Bearer": []
    }
  ]
}

Answer 1

.netcore 的最新版 Swashbuckle 有一些变化

如果您希望更改 Swashbuckle 中的请求 URL，可能您在 API 网关后面或将自定义域附加到您的 web 应用程序。这样做。

1. 创建文档过滤器

public class BasePathDocumentFilter : IDocumentFilter
    {
        public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
        {
            swaggerDoc.Servers = new List<OpenApiServer>() { new OpenApiServer() { Url = "hxxt://yoursite" } };
        }
    }

1. 在您的启动文件中。在services.AddSwaggerGen() 方法中添加像这样c.DocumentFilter<BasePathDocumentFilter>(); 的文档过滤器

Answer 2

您可以实现和注册自己的IDocumentFilter 并在那里设置所需的值。

public class MyDocumentFilter : IDocumentFilter
{
    public void Apply(SwaggerDocument swaggerDoc, SchemaRegistry schemaRegistry, IApiExplorer apiExplorer)
    {
        swaggerDoc.Host = "some-url-that-is-hosted-on-azure.azurewebsites.net";
        swaggerDoc.BasePath = "/api";
        swaggerDoc.Schemes = new List<string> { "https" };
    }
}

然后通过

注册

services.AddSwaggerGen(options =>
{
    options.DocumentFilter<MyDocumentFilter>();
});

Answer 3

Swagger / open api 3.0 及更高版本需要服务器对象。看： https://swagger.io/specification/#server-object

像这样在你的启动中设置它

app.UseSwagger(c =>
{
    c.PreSerializeFilters.Add((swagger, httpReq) =>
    {
        swagger.Servers = new List<OpenApiServer> { new OpenApiServer { Url = $"{httpReq.Scheme}://{httpReq.Host.Value}" } };
    });
});

Answer 4

编辑 (09SEP20) 下面是一些适用于 4.x.x 版本的 asp.netcore Swashbuckle 库的代码 sn-ps

将来我可能会再发一篇文章，以防下面的新版本更简单（在撰写本文时它是版本 5.x.x）

示例 appsettings.Development.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning",
      "Microsoft.Hosting.*": "Information"
    }
  },
  "Swagger": {
    "ApiVersion": "localhost",
    "ApiName": "v1",
    "SwaggerRelativeUrl": "/swagger/v1/swagger.json",
    "Title": "SalesforceLocationApi"
  }
}

示例 C# 代码

    namespace My.Api.Settings
    {
        public class SwaggerSettings
        {
            public string? ApiName { get; set; }
            public string? ApiVersion { get; set; }
            public string? SwaggerRelativeUrl { get; set; }
            public string? Title { get; set; }
        }
    }


    using Microsoft.AspNetCore.Authentication;
    using Microsoft.AspNetCore.Builder;
    using Microsoft.AspNetCore.Diagnostics;
    using Microsoft.AspNetCore.Hosting;
    using Microsoft.AspNetCore.Http;
    using Microsoft.AspNetCore.Http.Extensions;
    using Microsoft.AspNetCore.Mvc;
    using Microsoft.Extensions.Configuration;
    using Microsoft.Extensions.DependencyInjection;
    using Microsoft.Extensions.Hosting;
    using Microsoft.Extensions.Logging;
    using Newtonsoft.Json;
    using Swashbuckle.AspNetCore.SwaggerGen;
    using Swashbuckle.AspNetCore.SwaggerUI;
    using System;
    using System.Reflection;
    
    namespace My.Api
    {
        public class Startup
        {
            private readonly IConfiguration _configuration;
    
            public Startup(IConfiguration configuration)
            {
                _configuration = configuration;
            }
    
            public void ConfigureServices(IServiceCollection services)
            {
                services.AddControllers(ConfigureControllers);
    
                services
                    .AddSingleton<IHttpContextAccessor, HttpContextAccessor>()
                    .AddSwaggerGen(SetupUpSwaggerGen);
            }
    
            public void Configure(IApplicationBuilder application, IWebHostEnvironment environment, ILoggerFactory loggerFactory, IMapper mapper)
            {
                if (environment.IsDevelopment())
                {
                    application.UseDeveloperExceptionPage();
                }
                else
                {
                    application.UseExceptionHandler();
                }
    
                application
                    .UseHttpsRedirection()
                    .UseSwagger()
                    .UseSwaggerUI(SetUpSwaggerUi)
                    .UseRouting()
                    .UseAuthorization()
                    .UseEndpoints(endpoints => endpoints.MapControllers());
            }
    
            #region Helpers
    
            private void SetupUpSwaggerGen(SwaggerGenOptions options)
            {
                var swaggerSettings = _configuration.GetSection("Swagger").Get<SwaggerSettings>();
                SwaggerConfig.SetUpSwaggerGen(options, swaggerSettings);
            }
    
            private void SetUpSwaggerUi(SwaggerUIOptions options)
            {
                var swaggerSettings = _configuration.GetSection("Swagger").Get<SwaggerSettings>();
                SwaggerConfig.SetUpSwaggerUi(options, swaggerSettings.SwaggerRelativeUrl, swaggerSettings.ApiName);
            }
    
            #endregion
        }
    }

    using Microsoft.AspNetCore.Builder;
    using Microsoft.AspNetCore.Http;
    using Microsoft.Extensions.DependencyInjection;
    using Microsoft.OpenApi.Models;
    using Swashbuckle.AspNetCore.SwaggerGen;
    using Swashbuckle.AspNetCore.SwaggerUI;
    using System;
    using System.IO;
    using System.Linq;
    using System.Reflection;
    
    namespace My.Api
    {
        public class SwaggerConfig
        {
            internal class SwaggerDocumentFilter : IDocumentFilter
            {
                private readonly string _swaggerDocHost;
    
                public SwaggerDocumentFilter(IHttpContextAccessor httpContextAccessor)
                {
                    var host = httpContextAccessor.HttpContext.Request.Host.Value;
                    var scheme = httpContextAccessor.HttpContext.Request.Scheme;
                    _swaggerDocHost = $"{scheme}://{host}";
                }
    
                public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
                {
                    swaggerDoc.Servers.Add(new OpenApiServer { Url = _swaggerDocHost });
                }
            }
    
            internal static void SetUpSwaggerGen(SwaggerGenOptions options, SwaggerSettings swaggerSettings)
            {
                options.DocumentFilter<SwaggerDocumentFilter>();
                options.SwaggerDoc(swaggerSettings.ApiName, new OpenApiInfo { Title = swaggerSettings.Title, Version = swaggerSettings.ApiVersion });
                options.CustomSchemaIds(type => $"{type?.Namespace?.Split('.').Last()}.{type?.Name}"); //E.g. Acme.Dtos.Gas.Meter.cs --> Gas.Meter
    
                AddXmlComments(options);
            }
    
            internal static void SetUpSwaggerUi(SwaggerUIOptions options, string? swaggerRelativeUrl, string? apiName)
            {
                options.SwaggerEndpoint(swaggerRelativeUrl, apiName);
            }
    
            private static void AddXmlComments(SwaggerGenOptions options)
            {
                var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
                options.IncludeXmlComments(xmlPath);
            }
        }
    }

我正在使用 Swashbuckle.AspNetCore Nuget 4.0.1 版

我需要根据应用的托管位置动态添加主机。

这是我的解决方法

1. 你的 startup.cs 将 IHttpContextAccessor 添加到你的服务中

1. 在您的 swagger 配置中，添加一个 DocFilter，如下所示：

Answer 5

所以在 .net core 3 和 Open Api - Nswag.AspNetCore 版本 13.3.2 nuget。

    app.UseOpenApi( configure => { 
        configure.PostProcess = (doc, httpReq) =>
        {
            doc.Servers.Clear(); //... remove local host, added via asp .net core
            doc.Servers.Add(new OpenApiServer { Url = "[YOUR SERVER URL]" });  //... add server
        };

    });

来自这个 github 答案：https://github.com/RicoSuter/NSwag/issues/2441#issuecomment-583721522