Swashbuckle.AspNetCore3.0的二次封装与使用

关于 Swashbuckle.AspNetCore3.0

一个使用 ASP.NET Core 构建的 API 的 Swagger 工具。直接从您的路由，控制器和模型生成漂亮的 API 文档，包括用于探索和测试操作的 UI。
项目主页：https://github.com/domaindrivendev/Swashbuckle.AspNetCore
项目官方示例：https://github.com/domaindrivendev/Swashbuckle.AspNetCore/tree/master/test/WebSites

之前写过一篇Swashbuckle.AspNetCore-v1.10 的使用,现在 Swashbuckle.AspNetCore 已经升级到 3.0 了，正好开新坑(博客重构)重新封装了下，将所有相关的一些东西抽取到单独的类库中,尽可能的避免和项目耦合，使其能够在其他项目也能够快速使用。

运行示例

封装代码

待博客重构完成再将完整代码开源，参考下面步骤可自行封装

1. 新建类库并添加引用

我引用的版本如下

<PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.1.1" /> <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.1" /> <PackageReference Include="Swashbuckle.AspNetCore" Version="3.0.0" />

2. 构建参数模型 CustsomSwaggerOptions.cs

public class CustsomSwaggerOptions { /// <summary> /// 项目名称 /// </summary> public string ProjectName { get; set; } = "My API"; /// <summary> /// 接口文档显示版本 /// </summary> public string[] ApiVersions { get; set; } /// <summary> /// 接口文档访问路由前缀 /// </summary> public string RoutePrefix { get; set; } = "swagger"; /// <summary> /// 使用自定义首页 /// </summary> public bool UseCustomIndex { get; set; } /// <summary> /// UseSwagger Hook /// </summary> public Action<SwaggerOptions> UseSwaggerAction { get; set; } /// <summary> /// UseSwaggerUI Hook /// </summary> public Action<SwaggerUIOptions> UseSwaggerUIAction { get; set; } /// <summary> /// AddSwaggerGen Hook /// </summary> public Action<SwaggerGenOptions> AddSwaggerGenAction { get; set; } }

3. 版本控制默认参数接口实现 SwaggerDefaultValueFilter.cs

public class SwaggerDefaultValueFilter : IOperationFilter { public void Apply(Swashbuckle.AspNetCore.Swagger.Operation operation, OperationFilterContext context) { // REF: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/412 // REF: https://github.com/domaindrivendev/Swashbuckle.AspNetCore/pull/413 foreach (var parameter in operation.Parameters.OfType<NonBodyParameter>()) { var description = context.ApiDescription.ParameterDescriptions.FirstOrDefault(p => p.Name == parameter.Name); if (description == null) return; if (parameter.Description == null) { parameter.Description = description.ModelMetadata.Description; } if (description.RouteInfo != null) { parameter.Required |= !description.RouteInfo.IsOptional; if (parameter.Default == null) parameter.Default = description.RouteInfo.DefaultValue; } } }

4. CustomSwaggerServiceCollectionExtensions.cs

public static class CustomSwaggerServiceCollectionExtensions { public static IServiceCollection AddCustomSwagger(this IServiceCollection services) { return AddCustomSwagger(services, new CustsomSwaggerOptions()); } public static IServiceCollection AddCustomSwagger(this IServiceCollection services, CustsomSwaggerOptions options) { services.AddSwaggerGen(c => { if (options.ApiVersions == null) return; foreach (var version in options.ApiVersions) { c.SwaggerDoc(version, new Info { Title = options.ProjectName, Version = version }); } c.OperationFilter<SwaggerDefaultValueFilter>(); options.AddSwaggerGenAction?.Invoke(c); }); return services; } }

5. SwaggerBuilderExtensions.cs

public static class SwaggerBuilderExtensions { public static IApplicationBuilder UseCustomSwagger(this IApplicationBuilder app) { return UseCustomSwagger(app, new CustsomSwaggerOptions()); } public static IApplicationBuilder UseCustomSwagger(this IApplicationBuilder app, CustsomSwaggerOptions options) { app.UseSwagger(opt => { if (options.UseSwaggerAction == null) return; options.UseSwaggerAction(opt); }); app.UseSwaggerUI(c => { if (options.ApiVersions == null) return; c.RoutePrefix = options.RoutePrefix; c.DocumentTitle = options.ProjectName; if (options.UseCustomIndex) { c.UseCustomSwaggerIndex(); } foreach (var item in options.ApiVersions) { c.SwaggerEndpoint($"/swagger/{item}/swagger.json", $"{item}"); } options.UseSwaggerUIAction?.Invoke(c); }); return app; } /// <summary> /// 使用自定义首页 /// </summary> /// <returns></returns> public static void UseCustomSwaggerIndex(this SwaggerUIOptions c) { var currentAssembly = typeof(CustsomSwaggerOptions).GetTypeInfo().Assembly; c.IndexStream = () => currentAssembly.GetManifestResourceStream($"{currentAssembly.GetName().Name}.index.html"); } }

6. 模型初始化

private CustsomSwaggerOptions CURRENT_SWAGGER_OPTIONS = new CustsomSwaggerOptions() { ProjectName = "墨玄涯博客接口", ApiVersions = new string[] { "v1", "v2" },//要显示的版本 UseCustomIndex = true, RoutePrefix = "swagger", AddSwaggerGenAction = c => { var filePath = System.IO.Path.Combine(System.AppContext.BaseDirectory, typeof(Program).GetTypeInfo().Assembly.GetName().Name + ".xml"); c.IncludeXmlComments(filePath, true); }, UseSwaggerAction = c => { }, UseSwaggerUIAction = c => { } };

7. 在 api 项目中使用

添加对新建类库的引用，并在 webapi 项目中启用版本管理需要为输出项目添加 Nuget 包：Microsoft.AspNetCore.Mvc.Versioning，Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer (如果需要版本管理则添加)

我引用的版本如下

<PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="2.3.0" /> <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer" Version="2.2.0" />

Startup.cs 代码

public void ConfigureServices(IServiceCollection services) { services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); //版本控制 services.AddMvcCore().AddVersionedApiExplorer(o => o.GroupNameFormat = "‘v‘VVV"); services.AddApiVersioning(option => { // allow a client to call you without specifying an api version // since we haven‘t configured it otherwise, the assumed api version will be 1.0 option.AssumeDefaultVersionWhenUnspecified = true; option.ReportApiVersions = false; }); //custom swagger services.AddCustomSwagger(CURRENT_SWAGGER_OPTIONS); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env, IApiVersionDescriptionProvider provider) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } //custom swagger //自动检测存在的版本 // CURRENT_SWAGGER_OPTIONS.ApiVersions = provider.ApiVersionDescriptions.Select(s => s.GroupName).ToArray(); app.UseCustomSwagger(CURRENT_SWAGGER_OPTIONS); app.UseMvc(); }

关键代码拆解

action 方法的 xml 注释

new CustsomSwaggerOptions(){ AddSwaggerGenAction = c => { var filePath = System.IO.Path.Combine(System.AppContext.BaseDirectory, typeof(Program).GetTypeInfo().Assembly.GetName().Name + ".xml"); //controller及action注释 c.IncludeXmlComments(filePath, true); } }

当然还需要生成xml，编辑解决方案添加(或者在vs中项目属性->生成->勾选生成xml文档文件)如下配置片段

<PropertyGroup Condition="‘$(Configuration)|$(Platform)‘==‘Release|AnyCPU‘"> <DocumentationFile>.\项目名称.xml</DocumentationFile> </PropertyGroup> <PropertyGroup Condition="‘$(Configuration)|$(Platform)‘==‘Debug|AnyCPU‘"> <DocumentationFile>.\项目名称.xml</DocumentationFile> </PropertyGroup>

目前.net core2.1我这会将此 xml 生成到项目目录，故可能需要将其加入.gitignore中。

版本控制

添加 Nuget 包：Microsoft.AspNetCore.Mvc.Versioning，Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer
并在 ConfigureServices 中设置

//版本控制 services.AddMvcCore().AddVersionedApiExplorer(o => o.GroupNameFormat = "‘v‘VVV"); services.AddApiVersioning(option => { // allow a client to call you without specifying an api version // since we haven‘t configured it otherwise, the assumed api version will be 1.0 option.AssumeDefaultVersionWhenUnspecified = true; option.ReportApiVersions = false; });

controller 使用

/// <summary> /// 测试接口 /// </summary> [ApiVersion("1.0")] [Route("api/v{api-version:apiVersion}/test")] [ApiController] public class TestController : ControllerBase { }

自定义主题

将 index.html 修改为内嵌资源就可以使用GetManifestResourceStream获取文件流,使用此 html，可以自己使用var configObject = JSON.parse(‘%(ConfigObject)‘);获取到 swagger 的配置信息，从而根据此信息去写自己的主题即可。

/// <summary> /// 使用自定义首页 /// </summary> /// <returns></returns> public static void UseCustomSwaggerIndex(this SwaggerUIOptions c) { var currentAssembly = typeof(CustsomSwaggerOptions).GetTypeInfo().Assembly; c.IndexStream = () => currentAssembly.GetManifestResourceStream($"{currentAssembly.GetName().Name}.index.html"); }

若想注入 css，js 则在 UseSwaggerUIAction 委托中调用对应的方法接口，官方文档

另外，目前 swagger-ui 3.19.0 并不支持多语言，不过可以根据需要使用 js 去修改一些东西
比如在 index.html 的 onload 事件中这样去修改头部信息

document.getElementsByTagName( ‘span‘ )[0].innerText = document .getElementsByTagName(‘span‘)[0] .innerText.replace(‘swagger‘, ‘项目接口文档‘) document.getElementsByTagName( ‘span‘ )[1].innerText = document .getElementsByTagName(‘span‘)[1] .innerText.replace(‘Select a spec‘, ‘版本选择‘)

在找汉化解决方案时追踪到 Swashbuckle.AspNetCore3.0 主题时使用的swagger-ui 为 3.19.0，从issues2488了解到目前不支持多语言，其他的问题也可以查看此仓库
在使用过程中遇到的问题，基本上 readme 和 issues 都有答案，遇到问题多多阅读即可

参考文章

• 官方示例
• Asp.Net Core 中使用 Swagger，你不得不踩的坑

时间：2019-09-24 14:09:17 阅读（6）