asp.net core 3.0 中使用 swagger
Intro
上次更新了 asp.net core 3.0 简单的记录了一下 swagger 的使用，那个项目的 api 比较简单，都是匿名接口不涉及到认证以及 api 版本控制，最近把另外一个 api 项目升级到了 3.0，还是遇到了一些问题，这里单独写一篇文章介绍，避免踩坑。
Swagger 基本使用
swagger 服务注册：
services.AddSwaggerGen(option => { option.SwaggerDoc("sparktodo", new OpenApiInfo { Version = "v1", Title = "SparkTodo API", Description = "API for SparkTodo", Contact = new OpenApiContact() { Name = "WeihanLi", Email = "weihanli@outlook.com" } }); // include document file option.IncludeXmlComments(Path.Combine(AppContext.BaseDirectory, $"{typeof(Startup).Assembly.GetName().Name}.xml"), true); });中间件配置：
//Enable middleware to serve generated Swagger as a JSON endpoint.
app.UseSwagger();
//Enable middleware to serve swagger-ui (HTML, JS, CSS etc.), specifying the Swagger JSON endpoint
app.UseSwaggerUI(option =>
{ option.SwaggerEndpoint("/swagger/sparktodo/swagger.json", "sparktodo Docs"); option.RoutePrefix = string.Empty; option.DocumentTitle = "SparkTodo API";
});为 Swagger 添加 Bearer Token 认证
services.AddSwaggerGen(option =>
{ // ... // Add security definitions option.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme() { Description = "Please enter into field the word 'Bearer' followed by a space and the JWT value", Name = "Authorization", In = ParameterLocation.Header, Type = SecuritySchemeType.ApiKey, }); option.AddSecurityRequirement(new OpenApiSecurityRequirement { { new OpenApiSecurityScheme { Reference = new OpenApiReference() { Id = "Bearer", Type = ReferenceType.SecurityScheme } }, Array.Empty<string>() } });
});支持多个 ApiVersion
services.AddApiVersioning(options => { options.AssumeDefaultVersionWhenUnspecified = true; options.DefaultApiVersion = ApiVersion.Default; options.ReportApiVersions = true; });
services.AddSwaggerGen(option =>
{ // ... option.SwaggerDoc("v1", new OpenApiInfo { Version = "v1", Title = "API V1" }); option.SwaggerDoc("v2", new OpenApiInfo { Version = "v2", Title = "API V2" }); option.DocInclusionPredicate((docName, apiDesc) => { var versions = apiDesc.CustomAttributes() .OfType<ApiVersionAttribute>() .SelectMany(attr => attr.Versions); return versions.Any(v => $"v{v.ToString()}" == docName); }); option.OperationFilter<RemoveVersionParameterOperationFilter>(); option.DocumentFilter<SetVersionInPathDocumentFilter>();
});自定义 Api version 相关的 OperationFilter:
public class SetVersionInPathDocumentFilter : IDocumentFilter
{ public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context) { var updatedPaths = new OpenApiPaths(); foreach (var entry in swaggerDoc.Paths) { updatedPaths.Add( entry.Key.Replace("v{version}", swaggerDoc.Info.Version), entry.Value); } swaggerDoc.Paths = updatedPaths; }
}
public class RemoveVersionParameterOperationFilter : IOperationFilter
{ public void Apply(OpenApiOperation operation, OperationFilterContext context) { // Remove version parameter from all Operations var versionParameter = operation.Parameters.Single(p => p.Name == "version"); operation.Parameters.Remove(versionParameter); }
}中间件配置：
//Enable middleware to serve generated Swagger as a JSON endpoint.
app.UseSwagger();
//Enable middleware to serve swagger-ui (HTML, JS, CSS etc.), specifying the Swagger JSON endpoint
app.UseSwaggerUI(option =>
{ option.SwaggerEndpoint("/swagger/v2/swagger.json", "V2 Docs"); option.SwaggerEndpoint("/swagger/v1/swagger.json", "V1 Docs"); option.RoutePrefix = string.Empty; option.DocumentTitle = "SparkTodo API";
});最终 swagger 效果
Memo
上面的配置来自 https://github.com/WeihanLi/SparkTodo 这个项目，要获取代码可以参考这个项目
Reference
https://github.com/domaindrivendev/Swashbuckle.AspNetCore/tree/master/test/WebSites/MultipleVersions/Swagger
https://stackoverflow.com/questions/58197244/swaggerui-with-netcore-3-0-bearer-token-authorization
https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/1295
https://github.com/WeihanLi/SparkTodo
