Merge pull request #2797 from martincostello/gh-2740-add-missing-methods

Throw if unsupported HTTP method used

Author: domaindrivendev

src/Swashbuckle.AspNetCore.SwaggerGen/SwaggerGenerator/SwaggerGenerator.cs

@@ -202,7 +202,15 @@ private IDictionary<OperationType, OpenApiOperation> GenerateOperations(
 
                 var apiDescription = (group.Count() > 1) ? _options.ConflictingActionsResolver(group) : group.Single();
 
-                operations.Add(OperationTypeMap[httpMethod.ToUpper()], GenerateOperation(apiDescription, schemaRepository));
+                var normalizedMethod = httpMethod.ToUpperInvariant();
+                if (!OperationTypeMap.TryGetValue(normalizedMethod, out var operationType))
+                {
+                    // See https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/2600 and
+                    // https://github.com/domaindrivendev/Swashbuckle.AspNetCore/issues/2740.
+                    throw new SwaggerGeneratorException($"The \"{httpMethod}\" HTTP method is not supported.");
+                }
+
+                operations.Add(operationType, GenerateOperation(apiDescription, schemaRepository));
             };
 
             return operations;

test/Swashbuckle.AspNetCore.SwaggerGen.Test/SwaggerGenerator/SwaggerGeneratorTests.cs

@@ -2,19 +2,18 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc.Abstractions;
 using Microsoft.AspNetCore.Mvc.ApiExplorer;
 using Microsoft.AspNetCore.Mvc.ModelBinding;
-using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Models;
 using Swashbuckle.AspNetCore.Swagger;
 using Swashbuckle.AspNetCore.TestSupport;
 using Xunit;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore.Server.HttpSys;
-using Microsoft.AspNetCore.Authentication;
 
 namespace Swashbuckle.AspNetCore.SwaggerGen.Test
 {
@@ -1409,6 +1408,31 @@ public void GetSwagger_SupportsOption_DocumentFilters()
             Assert.Contains("ComplexType", document.Components.Schemas.Keys);
         }
 
+        [Theory]
+        [InlineData("connect")]
+        [InlineData("CONNECT")]
+        [InlineData("FOO")]
+        public void GetSwagger_GeneratesSwaggerDocument_ThrowsIfHttpMethodNotSupported(string httpMethod)
+        {
+            var subject = Subject(
+                apiDescriptions: new[]
+                {
+                    ApiDescriptionFactory.Create<FakeController>(
+                        c => nameof(c.ActionWithNoParameters), groupName: "v1", httpMethod: httpMethod, relativePath: "resource"),
+                },
+                options: new SwaggerGeneratorOptions
+                {
+                    SwaggerDocs = new Dictionary<string, OpenApiInfo>
+                    {
+                        ["v1"] = new OpenApiInfo { Version = "V1", Title = "Test API" }
+                    }
+                }
+            );
+
+            var exception = Assert.Throws<SwaggerGeneratorException>(() => subject.GetSwagger("v1"));
+            Assert.Equal($"The \"{httpMethod}\" HTTP method is not supported.", exception.Message);
+        }
+
         private static SwaggerGenerator Subject(
             IEnumerable<ApiDescription> apiDescriptions,
             SwaggerGeneratorOptions options = null,