Updated to support .net core 3

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AspNetCoreServerCodegen.java

@@ -23,7 +23,7 @@
 public class AspNetCoreServerCodegen extends AbstractCSharpCodegen {
 
     private String packageGuid = "{" + randomUUID().toString().toUpperCase() + "}";
-    private final String DEFAULT_ASP_NET_CORE_VERSION = "2.2";
+    private final String DEFAULT_ASP_NET_CORE_VERSION = "3.0";
     private String aspNetCoreVersion;
 
     @SuppressWarnings("hiding")
@@ -64,7 +64,7 @@ public AspNetCoreServerCodegen() {
                 sourceFolder);
 
         addOption(CodegenConstants.ASP_NET_CORE_VERSION,
-                "aspnetcore version to use, current options are: 2.0, 2.1 and 2.2 (default)",
+                "aspnetcore version to use, current options are: 2.0, 2.1, 2.2 and 3.0 (default)",
                 this.aspNetCoreVersion);
 
         addOption(CodegenConstants.INTERFACE_ONLY,
@@ -133,16 +133,35 @@ public void processOpts() {
             apiTemplateFiles.put("controller.mustache", ".cs");
             addInterfaceControllerTemplate(interfaceOnly, interfaceController);
 
+            supportingFiles.add(new SupportingFile("Filters" + File.separator + "BasePathFilter.mustache", packageFolder + File.separator + "Filters", "BasePathFilter.cs"));
+            supportingFiles.add(new SupportingFile("Filters" + File.separator + "GeneratePathParamsValidationFilter.mustache", packageFolder + File.separator + "Filters", "GeneratePathParamsValidationFilter.cs"));
+
+            supportingFiles.add(new SupportingFile("Startup.mustache", packageFolder, "Startup.cs"));
             supportingFiles.add(new SupportingFile("Program.mustache", packageFolder, "Program.cs"));
             supportingFiles.add(new SupportingFile("Project.csproj.mustache", packageFolder, this.packageName + ".csproj"));
             supportingFiles.add(new SupportingFile("Dockerfile.mustache", packageFolder, "Dockerfile"));
-        } else {
+        } else if (this.aspNetCoreVersion.equals("2.1")) {
             apiTemplateFiles.put("2.1/controller.mustache", ".cs");
             addInterfaceControllerTemplate(interfaceOnly, interfaceController);
 
+            supportingFiles.add(new SupportingFile("Filters" + File.separator + "BasePathFilter.mustache", packageFolder + File.separator + "Filters", "BasePathFilter.cs"));
+            supportingFiles.add(new SupportingFile("Filters" + File.separator + "GeneratePathParamsValidationFilter.mustache", packageFolder + File.separator + "Filters", "GeneratePathParamsValidationFilter.cs"));
+
+            supportingFiles.add(new SupportingFile("Startup.mustache", packageFolder, "Startup.cs"));
             supportingFiles.add(new SupportingFile("2.1/Program.mustache", packageFolder, "Program.cs"));
             supportingFiles.add(new SupportingFile("2.1/Project.csproj.mustache", packageFolder, this.packageName + ".csproj"));
             supportingFiles.add(new SupportingFile("2.1/Dockerfile.mustache", packageFolder, "Dockerfile"));
+        } else {
+            apiTemplateFiles.put("3.0/controller.mustache", ".cs");
+            addInterfaceControllerTemplate(interfaceOnly, interfaceController);
+
+            supportingFiles.add(new SupportingFile("3.0" + File.separator + "Filters" + File.separator + "BasePathFilter.mustache", packageFolder + File.separator + "Filters", "BasePathFilter.cs"));
+            supportingFiles.add(new SupportingFile("3.0" + File.separator + "Filters" + File.separator + "GeneratePathParamsValidationFilter.mustache", packageFolder + File.separator + "Filters", "GeneratePathParamsValidationFilter.cs"));
+
+            supportingFiles.add(new SupportingFile("3.0/Startup.mustache", packageFolder, "Startup.cs"));
+            supportingFiles.add(new SupportingFile("3.0/Program.mustache", packageFolder, "Program.cs"));
+            supportingFiles.add(new SupportingFile("3.0/Project.csproj.mustache", packageFolder, this.packageName + ".csproj"));
+            supportingFiles.add(new SupportingFile("3.0/Dockerfile.mustache", packageFolder, "Dockerfile"));
         }
 
         additionalProperties.put("aspNetCoreVersion", aspNetCoreVersion);
@@ -159,20 +178,14 @@ public void processOpts() {
         supportingFiles.add(new SupportingFile("build.bat.mustache", "", "build.bat"));
         supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
         supportingFiles.add(new SupportingFile("Solution.mustache", "", this.packageName + ".sln"));
-        supportingFiles.add(new SupportingFile("Dockerfile.mustache", packageFolder, "Dockerfile"));
         supportingFiles.add(new SupportingFile("gitignore", packageFolder, ".gitignore"));
         supportingFiles.add(new SupportingFile("appsettings.json", packageFolder, "appsettings.json"));
 
-        supportingFiles.add(new SupportingFile("Startup.mustache", packageFolder, "Startup.cs"));
         supportingFiles.add(new SupportingFile("validateModel.mustache", packageFolder + File.separator + "Attributes", "ValidateModelStateAttribute.cs"));
         supportingFiles.add(new SupportingFile("web.config", packageFolder, "web.config"));
 
         supportingFiles.add(new SupportingFile("Properties" + File.separator + "launchSettings.json", packageFolder + File.separator + "Properties", "launchSettings.json"));
 
-        supportingFiles.add(new SupportingFile("Filters" + File.separator + "BasePathFilter.mustache", packageFolder + File.separator + "Filters", "BasePathFilter.cs"));
-        supportingFiles.add(new SupportingFile("Filters" + File.separator + "GeneratePathParamsValidationFilter.mustache", packageFolder + File.separator + "Filters", "GeneratePathParamsValidationFilter.cs"));
-
-        supportingFiles.add(new SupportingFile("wwwroot" + File.separator + "README.md", packageFolder + File.separator + "wwwroot", "README.md"));
         supportingFiles.add(new SupportingFile("wwwroot" + File.separator + "index.html", packageFolder + File.separator + "wwwroot", "index.html"));
         supportingFiles.add(new SupportingFile("wwwroot" + File.separator + "web.config", packageFolder + File.separator + "wwwroot", "web.config"));
 
@@ -301,7 +314,7 @@ private void setAspNetCoreVersion(String optionValue) {
             return;
         }
         this.aspNetCoreVersion = optionValue;
-        if (!this.aspNetCoreVersion.equals("2.0") && !this.aspNetCoreVersion.equals("2.1") && !this.aspNetCoreVersion.equals("2.2")) {
+        if (!this.aspNetCoreVersion.equals("2.0") && !this.aspNetCoreVersion.equals("2.1") && !this.aspNetCoreVersion.equals("2.2") && !this.aspNetCoreVersion.equals("3.0")) {
             LOGGER.error("version '" + this.aspNetCoreVersion + "' is not supported, switching to default version: '" + DEFAULT_ASP_NET_CORE_VERSION + "'");
             this.aspNetCoreVersion = DEFAULT_ASP_NET_CORE_VERSION;
         }

modules/swagger-codegen/src/main/resources/aspnetcore/3.0/Dockerfile.mustache

@@ -0,0 +1,18 @@
+FROM mcr.microsoft.com/dotnet/core/sdk:{{aspNetCoreVersion}} AS build-env
+WORKDIR /app
+
+ENV DOTNET_CLI_TELEMETRY_OPTOUT 1
+
+# copy csproj and restore as distinct layers
+COPY *.csproj ./
+RUN dotnet restore
+
+# copy everything else and build
+COPY . ./
+RUN dotnet publish -c Release -o out
+
+# build runtime image
+FROM mcr.microsoft.com/dotnet/core/aspnet:{{aspNetCoreVersion}}
+WORKDIR /app
+COPY --from=build-env /app/out .
+ENTRYPOINT ["dotnet", "{{packageName}}.dll"]

modules/swagger-codegen/src/main/resources/aspnetcore/3.0/Filters/BasePathFilter.mustache

@@ -0,0 +1,51 @@
+using System.Linq;
+using System.Text.RegularExpressions;
+using Swashbuckle.AspNetCore.Swagger;
+using Swashbuckle.AspNetCore.SwaggerGen;
+using Microsoft.OpenApi.Models;
+
+namespace {{packageName}}.Filters
+{
+    /// <summary>
+    /// BasePath Document Filter sets BasePath property of Swagger and removes it from the individual URL paths
+    /// </summary>
+    public class BasePathFilter : IDocumentFilter
+    {
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="basePath">BasePath to remove from Operations</param>
+        public BasePathFilter(string basePath)
+        {
+            BasePath = basePath;
+        }
+
+        /// <summary>
+        /// Gets the BasePath of the Swagger Doc
+        /// </summary>
+        /// <returns>The BasePath of the Swagger Doc</returns>
+        public string BasePath { get; }
+
+        /// <summary>
+        /// Apply the filter
+        /// </summary>
+        /// <param name="swaggerDoc">OpenApiDocument</param>
+        /// <param name="context">FilterContext</param>
+        public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
+        {
+            swaggerDoc.Servers.Add(new OpenApiServer() { Url = this.BasePath });
+
+            var pathsToModify = swaggerDoc.Paths.Where(p => p.Key.StartsWith(this.BasePath)).ToList();
+
+            foreach (var path in pathsToModify)
+            {
+                if (path.Key.StartsWith(this.BasePath))
+                {
+                    string newKey = Regex.Replace(path.Key, $"^{this.BasePath}", string.Empty);
+                    swaggerDoc.Paths.Remove(path.Key);
+                    swaggerDoc.Paths.Add(newKey, path.Value);
+                }
+            }
+        }
+    }
+}

modules/swagger-codegen/src/main/resources/aspnetcore/3.0/Filters/GeneratePathParamsValidationFilter.mustache

@@ -0,0 +1,98 @@
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc.Controllers;
+using Swashbuckle.AspNetCore.Swagger;
+using Swashbuckle.AspNetCore.SwaggerGen;
+using Microsoft.OpenApi.Models;
+
+namespace {{packageName}}.Filters
+{
+    /// <summary>
+    /// Path Parameter Validation Rules Filter
+    /// </summary>
+    public class GeneratePathParamsValidationFilter : IOperationFilter
+    {
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="operation">Operation</param>
+        /// <param name="context">OperationFilterContext</param>
+        public void Apply(OpenApiOperation operation, OperationFilterContext context)
+        {
+            var pars = context.ApiDescription.ParameterDescriptions;
+
+            foreach (var par in pars)
+            {
+                var swaggerParam = operation.Parameters.SingleOrDefault(p => p.Name == par.Name);
+
+                var attributes = ((ControllerParameterDescriptor)par.ParameterDescriptor).ParameterInfo.CustomAttributes;
+
+                if (attributes != null && attributes.Count() > 0 && swaggerParam != null)
+                {
+                    // Required - [Required]
+                    var requiredAttr = attributes.FirstOrDefault(p => p.AttributeType == typeof(RequiredAttribute));
+                    if (requiredAttr != null)
+                    {
+                        swaggerParam.Required = true;
+                    }
+
+                    // Regex Pattern [RegularExpression]
+                    var regexAttr = attributes.FirstOrDefault(p => p.AttributeType == typeof(RegularExpressionAttribute));
+                    if (regexAttr != null)
+                    {
+                        string regex = (string)regexAttr.ConstructorArguments[0].Value;
+                        if (swaggerParam is OpenApiParameter)
+                        {
+                            ((OpenApiParameter)swaggerParam).Schema.Pattern = regex;
+                        }
+                    }
+
+                    // String Length [StringLength]
+                    int? minLenght = null, maxLength = null;
+                    var stringLengthAttr = attributes.FirstOrDefault(p => p.AttributeType == typeof(StringLengthAttribute));
+                    if (stringLengthAttr != null)
+                    {
+                        if (stringLengthAttr.NamedArguments.Count == 1)
+                        {
+                            minLenght = (int)stringLengthAttr.NamedArguments.Single(p => p.MemberName == "MinimumLength").TypedValue.Value;
+                        }
+                        maxLength = (int)stringLengthAttr.ConstructorArguments[0].Value;
+                    }
+
+                    var minLengthAttr = attributes.FirstOrDefault(p => p.AttributeType == typeof(MinLengthAttribute));
+                    if (minLengthAttr != null)
+                    {
+                        minLenght = (int)minLengthAttr.ConstructorArguments[0].Value;
+                    }
+
+                    var maxLengthAttr = attributes.FirstOrDefault(p => p.AttributeType == typeof(MaxLengthAttribute));
+                    if (maxLengthAttr != null)
+                    {
+                        maxLength = (int)maxLengthAttr.ConstructorArguments[0].Value;
+                    }
+
+                    if (swaggerParam is OpenApiParameter)
+                    {
+                        ((OpenApiParameter)swaggerParam).Schema.MinLength = minLenght;
+                        ((OpenApiParameter)swaggerParam).Schema.MaxLength = maxLength;
+                    }
+
+                    // Range [Range]
+                    var rangeAttr = attributes.FirstOrDefault(p => p.AttributeType == typeof(RangeAttribute));
+                    if (rangeAttr != null)
+                    {
+                        int rangeMin = (int)rangeAttr.ConstructorArguments[0].Value;
+                        int rangeMax = (int)rangeAttr.ConstructorArguments[1].Value;
+
+                        if (swaggerParam is OpenApiParameter)
+                        {
+                            ((OpenApiParameter)swaggerParam).Schema.Minimum = rangeMin;
+                            ((OpenApiParameter)swaggerParam).Schema.Maximum = rangeMax;
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+

modules/swagger-codegen/src/main/resources/aspnetcore/3.0/Program.mustache

@@ -0,0 +1,29 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore;
+
+namespace {{packageName}}
+{
+    /// <summary>
+    /// Program
+    /// </summary>
+    public class Program
+    {
+        /// <summary>
+        /// Main
+        /// </summary>
+        /// <param name="args"></param>
+        public static void Main(string[] args)
+        {
+            CreateWebHostBuilder(args).Build().Run();
+        }
+
+        /// <summary>
+        /// Create the web host builder.
+        /// </summary>
+        /// <param name="args"></param>
+        /// <returns>IWebHostBuilder</returns>
+        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
+            WebHost.CreateDefaultBuilder(args)
+                .UseStartup<Startup>();
+    }
+}

modules/swagger-codegen/src/main/resources/aspnetcore/3.0/Project.csproj.mustache

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <PropertyGroup>
+    <Description>{{packageName}}</Description>
+    <Copyright>{{packageName}}</Copyright>
+    <TargetFramework>netcoreapp{{aspNetCoreVersion}}</TargetFramework>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+    <PreserveCompilationContext>true</PreserveCompilationContext>
+    <AssemblyName>{{packageName}}</AssemblyName>
+    <PackageId>{{packageName}}</PackageId>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="5.0.0-rc4"/>
+    <PackageReference Include="Swashbuckle.AspNetCore.SwaggerGen" Version="5.0.0-rc4"/>
+    <PackageReference Include="Swashbuckle.AspNetCore.SwaggerUI" Version="5.0.0-rc4"/>
+    <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="5.0.0-rc4" />
+  </ItemGroup>
+  <ItemGroup>
+    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.4" />
+  </ItemGroup>
+</Project>