Add sample for BFF with openapi

BFF/v3/OpenApi/OpenApi.Api1/OpenApi.Api1.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <OpenApiDocumentsDirectory>.</OpenApiDocumentsDirectory>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.3" />
+    <PackageReference Include="Microsoft.Extensions.ApiDescription.Server" Version="9.0.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\OpenApi.DevServer.ServiceDefaults\OpenApi.DevServer.ServiceDefaults.csproj" />
+  </ItemGroup>
+
+</Project>

BFF/v3/OpenApi/OpenApi.Api1/OpenApi.Api1.http

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+@OpenApi.Api1_HostAddress = https://localhost:7289
+
+GET {{OpenApi.Api1_HostAddress}}/weatherforecast/
+Accept: application/json
+
+###

BFF/v3/OpenApi/OpenApi.Api1/OpenApi.Api1.json

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+{
+  "openapi": "3.0.1",
+  "info": {
+    "title": "OpenApi.Api1 | v1",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/weatherforecastFahrenheit": {
+      "get": {
+        "tags": [
+          "OpenApi.Api1"
+        ],
+        "operationId": "GetWeatherForecast",
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/WeatherForecast"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "WeatherForecast": {
+        "required": [
+          "date",
+          "temperatureF",
+          "summary"
+        ],
+        "type": "object",
+        "properties": {
+          "date": {
+            "type": "string",
+            "format": "date"
+          },
+          "temperatureF": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "summary": {
+            "type": "string",
+            "nullable": true
+          }
+        }
+      }
+    },
+    "securitySchemes": {
+      "Bearer": {
+        "type": "http",
+        "scheme": "bearer",
+        "bearerFormat": "Json Web Token"
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "OpenApi.Api1"
+    }
+  ]
+}

BFF/v3/OpenApi/OpenApi.Api1/Program.cs

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+var builder = WebApplication.CreateBuilder(args);
+
+builder.AddServiceDefaults();
+
+builder.AddDefaultAuthentication();
+builder.AddDefaultOpenApiConfig();
+
+var app = builder.Build();
+
+app.MapDefaultEndpoints();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.MapOpenApi();
+}
+
+app.UseHttpsRedirection();
+
+var summaries = new[]
+{
+    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+};
+
+app.MapGet("/weatherforecastFahrenheit", (HttpContext c) =>
+{
+    var forecast =  Enumerable.Range(1, 5).Select(index =>
+        new WeatherForecast
+        (
+            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+            Random.Shared.Next(-4, 131),
+            summaries[Random.Shared.Next(summaries.Length)]
+        ))
+        .ToArray();
+    return forecast;
+})
+.RequireAuthorization()
+
+.WithName("GetWeatherForecast");
+
+app.Run();
+
+record WeatherForecast(DateOnly Date, int TemperatureF, string? Summary)
+{
+
+}

BFF/v3/OpenApi/OpenApi.Api1/Properties/launchSettings.json

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+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": false,
+      "applicationUrl": "https://localhost:7289;http://localhost:5265",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

BFF/v3/OpenApi/OpenApi.Api1/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

BFF/v3/OpenApi/OpenApi.Api1/appsettings.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

BFF/v3/OpenApi/OpenApi.Api2/OpenApi.Api2.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <OpenApiDocumentsDirectory>.</OpenApiDocumentsDirectory>
+  </PropertyGroup>
+
+  <ItemGroup>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\OpenApi.DevServer.ServiceDefaults\OpenApi.DevServer.ServiceDefaults.csproj" />
+    <PackageReference Include="Microsoft.Extensions.ApiDescription.Server" Version="9.0.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+</Project>

BFF/v3/OpenApi/OpenApi.Api2/OpenApi.Api2.http

@@ -0,0 +1,6 @@
+@OpenApi.Api2_HostAddress = https://localhost:7289
+
+GET {{OpenApi.Api2_HostAddress}}/weatherforecastfahrenheit/
+Accept: application/json
+
+###

BFF/v3/OpenApi/OpenApi.Api2/OpenApi.Api2.json

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+{
+  "openapi": "3.0.1",
+  "info": {
+    "title": "OpenApi.Api2 | v1",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/WeatherforecastCelcius": {
+      "get": {
+        "tags": [
+          "OpenApi.Api2"
+        ],
+        "operationId": "GetWeatherForecast",
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/WeatherForecast"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "WeatherForecast": {
+        "required": [
+          "date",
+          "temperatureC",
+          "summary"
+        ],
+        "type": "object",
+        "properties": {
+          "date": {
+            "type": "string",
+            "format": "date"
+          },
+          "temperatureC": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "summary": {
+            "type": "string",
+            "nullable": true
+          }
+        }
+      }
+    },
+    "securitySchemes": {
+      "Bearer": {
+        "type": "http",
+        "scheme": "bearer",
+        "bearerFormat": "Json Web Token"
+      }
+    }
+  },
+  "tags": [
+    {
+      "name": "OpenApi.Api2"
+    }
+  ]
+}

BFF/v3/OpenApi/OpenApi.Api2/Program.cs

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+var builder = WebApplication.CreateBuilder(args);
+
+builder.AddServiceDefaults();
+
+builder.AddDefaultAuthentication();
+
+builder.AddDefaultOpenApiConfig();
+
+var app = builder.Build();
+
+app.MapDefaultEndpoints();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.MapOpenApi();
+}
+
+app.UseHttpsRedirection();
+
+var summaries = new[]
+{
+    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+};
+
+app.MapGet("/WeatherforecastCelcius", () =>
+{
+    var forecast =  Enumerable.Range(1, 5).Select(index =>
+        new WeatherForecast
+        (
+            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+            Random.Shared.Next(-20, 55),
+            summaries[Random.Shared.Next(summaries.Length)]
+        ))
+        .ToArray();
+    return forecast;
+})
+.WithName("GetWeatherForecast").RequireAuthorization();
+;
+
+app.Run();
+
+record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
+{
+}

BFF/v3/OpenApi/OpenApi.Api2/Properties/launchSettings.json

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+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": false,
+      "applicationUrl": "https://localhost:7297;http://localhost:5084",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

BFF/v3/OpenApi/OpenApi.Api2/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

BFF/v3/OpenApi/OpenApi.Api2/appsettings.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

BFF/v3/OpenApi/OpenApi.Bff/Configuration.cs

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+using Duende.Bff;
+
+namespace OpenApi.Bff;
+
+/// <summary>
+/// Configuration section
+/// </summary>
+public class Configuration
+{
+    public string? Authority { get; set; }
+
+    public string? ClientId { get; set; }
+
+    /// <summary>
+    /// should be supplied as a command line argument or environment variable, e.g.
+    /// ./GenericBFF --BFF:ClientSecret=secret
+    /// </summary>
+    public string? ClientSecret { get; set; }
+
+    public List<string> Scopes { get; set; } = new();
+    public List<Api> Apis { get; set; } = new();
+}
+
+public class Api
+{
+    public string? LocalPath { get; set; }
+    public string? RemoteUrl { get; set; }
+    public TokenType RequiredToken { get; set; }
+}