netcore 子目录配置swagger

部署到测试环境 反向代理到一个子目录中，导致swagger 能访问但是swagger页面接口调用路径不正确(缺少路径) ，查询相关文档解决。

  public void ConfigureServices(IServiceCollection services)
        {

            services.Configure<IISServerOptions>(options =>
            {
                options.AllowSynchronousIO = true;
            });

            //服务注册
            services.AddSingleton<IUsersDAL, UsersDAL>();
            services.AddSingleton<IRanksDAL, RanksDAL>();
            services.AddSingleton<IRewardsDAL, RewardsDAL>();
            services.AddSingleton<IPrizesDAL, PrizesDAL>();

            services.AddSingleton<IUsersService, UsersService>();
            services.AddSingleton<IRanksService, RanksService>();
            services.AddSingleton<IRewardsService, RewardsService>();
            services.AddSingleton<IPrizesService, PrizesService>();


            services.AddControllers();

            services.AddMvcCore(options =>
            {
                options.Filters.Add(typeof(ApiActionFilter));
                options.Filters.Add(typeof(ApiExceptionFilter));
            });

            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo
                {
                    Title = "XX大赛 API",
                    Version = "V1",
                    Description = "XX大赛"
                });
                //为 Swagger JSON and UI设置xml文档注释路径
                var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
                var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
                c.IncludeXmlComments(xmlPath);
            });
        }

 

//关键代码在下面 》》》》》
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            var enableSwagger = Configuration.GetValue<bool>("EnableSwagger");

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            if (enableSwagger)
            {

               
                if (env.IsDevelopment())
                {
                    app.UseSwagger();
                  
                    app.UseSwaggerUI(c =>
                    {
                        c.SwaggerEndpoint("/swagger/v1/swagger.json", "ZJCX.DrivingRace.API v1");
                    });
                }
                if (env.IsProduction())
                {
                    app.UseSwagger(c => {
                        c.PreSerializeFilters.Add((swagger, request) => {
                            OpenApiPaths newPaths = new OpenApiPaths();
                            foreach (var path in swagger.Paths)
                            {
                                newPaths.Add("/race" + path.Key, path.Value);
                            }
                            swagger.Paths = newPaths;
                        });
                    });
                    app.UseSwaggerUI(c =>
                    {
                        c.SwaggerEndpoint("/race/swagger/v1/swagger.json", "ZJCX.DrivingRace.API v1");
                    });
                }
            }

            //app.UseZJCXWebAPIMiddleware();
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseRouting();

            app.UseAuthorization();
            app.UseRequestSession();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }