defaulting to stream for unknown mime types

CHANGELOG.md

@@ -13,12 +13,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added support for vendor specific content types generation/serialization. [#1197](https://github.com/microsoft/kiota/issues/1197)
 - Added support for 204 no content in generation and CSharp/Java/Go/TypeScript request adapters. #1410
 - Added a draft swift generation implementation. #1444
+- Added support for yaml response type generation. [#302](https://github.com/microsoft/kiota/issues/302)
+- Added support for xml response type generation. [#302](https://github.com/microsoft/kiota/issues/302)
+- Added support for unstructured response generation (stream). [#546](https://github.com/microsoft/kiota/issues/546)
 
 ### Changed
 
 - Fixed a bug where the base url of the request adapter would be reset by the client. [#1443](https://github.com/microsoft/kiota/issues/1443)
 - Fixed a bug where request builder classes for collections endpoints would have a wrong name. #1052
-- Fix issue with ambiguous type names causing build errors and stack overflows. (Shell) #1052
+- Fixed issue with ambiguous type names causing build errors and stack overflows. (Shell) #1052
 - Fixed a bug where symbols (properties, methods, classes) could contain invalid characters #1436
 - Renamed parameters for requests: o => options, q => queryParameters, h => headers. [#1380](https://github.com/microsoft/kiota/issues/1380)
 

src/Kiota.Builder/Extensions/OpenApiOperationExtensions.cs

@@ -7,9 +7,12 @@
 namespace Kiota.Builder.Extensions {
     public static class OpenApiOperationExtensions {
         private static readonly HashSet<string> successCodes = new(StringComparer.OrdinalIgnoreCase) {"200", "201", "202"}; //204 excluded as it won't have a schema
-        private static readonly HashSet<string> validMimeTypes = new (StringComparer.OrdinalIgnoreCase) {
+        private static readonly HashSet<string> structuredMimeTypes = new (StringComparer.OrdinalIgnoreCase) {
             "application/json",
-            "text/plain"
+            "application/xml",
+            "text/plain",
+            "text/xml",
+            "text/yaml",
         };
         /// <summary>
         /// cleans application/vnd.github.mercy-preview+json to application/json
@@ -19,8 +22,7 @@ public static OpenApiSchema GetResponseSchema(this OpenApiOperation operation)
         {
             // Return Schema that represents all the possible success responses!
             var schemas = operation.Responses.Where(r => successCodes.Contains(r.Key))
-                                .SelectMany(re => re.Value.GetResponseSchemas())
-                                .Where(s => s is not null);
+                                .SelectMany(re => re.Value.GetResponseSchemas());
 
             return schemas.FirstOrDefault();
         }
@@ -29,7 +31,7 @@ public static IEnumerable<OpenApiSchema> GetResponseSchemas(this OpenApiResponse
             var schemas = response.Content
                                 .Where(c => !string.IsNullOrEmpty(c.Key))
                                 .Select(c => (Key: c.Key.Split(';', StringSplitOptions.RemoveEmptyEntries).FirstOrDefault(), c.Value))
-                                .Where(c => validMimeTypes.Contains(c.Key) || validMimeTypes.Contains(vendorSpecificCleanup.Replace(c.Key, string.Empty)))
+                                .Where(c => structuredMimeTypes.Contains(c.Key) || structuredMimeTypes.Contains(vendorSpecificCleanup.Replace(c.Key, string.Empty)))
                                 .Select(co => co.Value.Schema)
                                 .Where(s => s is not null);
 

src/Kiota.Builder/GenerationConfiguration.cs

@@ -12,7 +12,6 @@ public class GenerationConfiguration {
         public GenerationLanguage Language { get; set; } = GenerationLanguage.CSharp;
         public string ApiRootUrl { get; set; }
         public string[] PropertiesPrefixToStrip { get; set; } = new string[] { "@odata."};
-        public HashSet<string> IgnoredRequestContentTypes { get; set; } = new();
         public bool UsesBackingStore { get; set; }
         public List<string> Serializers { get; set; } = new();
         public List<string> Deserializers { get; set; } = new();

src/Kiota.Builder/KiotaBuilder.cs

@@ -303,8 +303,7 @@ private void CreateRequestBuilderClass(CodeNamespace currentNamespace, OpenApiUr
         {
             foreach(var operation in currentNode
                                     .PathItems[Constants.DefaultOpenApiLabel]
-                                    .Operations
-                                    .Where(x => x.Value.RequestBody?.Content?.Any(y => !config.IgnoredRequestContentTypes.Contains(y.Key)) ?? true))
+                                    .Operations)
                 CreateOperationMethods(currentNode, operation.Key, operation.Value, codeClass);
         }
         CreateUrlManagement(codeClass, currentNode, isApiClientClass);
@@ -622,13 +621,13 @@ private void CreateOperationMethods(OpenApiUrlTreeNode currentNode, OperationTyp
             var returnType = CreateModelDeclarations(currentNode, schema, operation, executorMethod, "Response");
             executorMethod.ReturnType = returnType ?? throw new InvalidOperationException("Could not resolve return type for operation");
         } else {
-            var returnType = voidType;
-            if(operation.Responses.Any(x => x.Value.Content.ContainsKey(RequestBodyBinaryContentType)))
-                returnType = "binary";
+            string returnType;
+            if(operation.Responses.Any(x => noContentStatusCodes.Contains(x.Key)))
+                returnType = voidType;
             else if (operation.Responses.Any(x => x.Value.Content.ContainsKey(RequestBodyPlainTextContentType)))
                 returnType = "string";
-            else if(!operation.Responses.Any(x => noContentStatusCodes.Contains(x.Key)))
-                logger.LogWarning("could not find operation return type {operationType} {currentNodePath}", operationType, currentNode.Path);
+            else
+                returnType = "binary";
             executorMethod.ReturnType = new CodeType { Name = returnType, IsExternal = true, };
         }
 

tests/Kiota.Builder.Tests/KiotaBuilderTests.cs

@@ -1768,8 +1768,40 @@ public void ModelsUseDescriptionWhenAvailable(){
         Assert.NotNull(responseClass);
         Assert.Equal("some description", responseClass.Description);
     }
-    [Fact]
-    public void GeneratesAVoidExecutorForSingle204() {
+    [InlineData("application/json", "204", true, "void")]
+    [InlineData("application/json", "204", false, "void")]
+    [InlineData("application/json", "200", true, "Myobject")]
+    [InlineData("application/json", "200", false, "binary")]
+    [InlineData("application/xml", "204", true, "void")]
+    [InlineData("application/xml", "204", false, "void")]
+    [InlineData("application/xml", "200", true, "Myobject")]
+    [InlineData("application/xml", "200", false, "binary")]
+    [InlineData("text/xml", "204", true, "void")]
+    [InlineData("text/xml", "204", false, "void")]
+    [InlineData("text/xml", "200", true, "Myobject")]
+    [InlineData("text/xml", "200", false, "binary")]
+    [InlineData("text/yaml", "204", true, "void")]
+    [InlineData("text/yaml", "204", false, "void")]
+    [InlineData("text/yaml", "200", true, "Myobject")]
+    [InlineData("text/yaml", "200", false, "binary")]
+    [InlineData("application/octet-stream", "204", true, "void")]
+    [InlineData("application/octet-stream", "204", false, "void")]
+    [InlineData("application/octet-stream", "200", true, "binary")]
+    [InlineData("application/octet-stream", "200", false, "binary")]
+    [InlineData("text/html", "204", true, "void")]
+    [InlineData("text/html", "204", false, "void")]
+    [InlineData("text/html", "200", true, "binary")]
+    [InlineData("text/html", "200", false, "binary")]
+    [InlineData("*/*", "204", true, "void")]
+    [InlineData("*/*", "204", false, "void")]
+    [InlineData("*/*", "200", true, "binary")]
+    [InlineData("*/*", "200", false, "binary")]
+    [InlineData("text/plain", "204", true, "void")]
+    [InlineData("text/plain", "204", false, "void")]
+    [InlineData("text/plain", "200", true, "Myobject")]
+    [InlineData("text/plain", "200", false, "string")]
+    [Theory]
+    public void GeneratesTheRightReturnTypeBasedOnContentAndStatus(string contentType, string statusCode, bool addModel, string returnType) {
         var myObjectSchema = new OpenApiSchema {
             Type = "object",
             Properties = new Dictionary<string, OpenApiSchema> {
@@ -1792,10 +1824,10 @@ public void GeneratesAVoidExecutorForSingle204() {
                         [OperationType.Get] = new OpenApiOperation() { 
                             Responses = new OpenApiResponses
                             {
-                                ["204"] = new OpenApiResponse {
+                                [statusCode] = new OpenApiResponse {
                                     Content = {
-                                        ["application/json"] = new OpenApiMediaType {
-                                            Schema = myObjectSchema
+                                        [contentType] = new OpenApiMediaType {
+                                            Schema = addModel ? myObjectSchema : null
                                         }
                                     }
                                 },
@@ -1822,7 +1854,7 @@ public void GeneratesAVoidExecutorForSingle204() {
         Assert.NotNull(rbClass);
         var executor = rbClass.Methods.FirstOrDefault(x => x.IsOfKind(CodeMethodKind.RequestExecutor));
         Assert.NotNull(executor);
-        Assert.Equal("void", executor.ReturnType.Name);
+        Assert.Equal(returnType, executor.ReturnType.Name);
     }
     [Fact]
     public void DoesntGenerateVoidExecutorOnMixed204(){