Add SwaggerBeanConfiguration to support application/octet-stream in Swagger UI

Author: jreynard-code

src/main/kotlin/com/cosmotech/api/config/SwaggerBeanConfiguration.kt

@@ -0,0 +1,28 @@
+// Copyright (c) Cosmo Tech.
+// Licensed under the MIT license.
+package com.cosmotech.api.config
+
+import org.springframework.context.annotation.Configuration
+import org.springframework.http.MediaType
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter
+
+/**
+ * This class is here as a suggested workaround for the following issues. Swagger UI does not handle
+ * multipart requests correctly even if `encoding` property is set in openapi.yaml Each part of a
+ * multipart/form-data is sent with a content-type set to application/octet-stream The following
+ * workaround adds application/octet-stream has a supported MediaType for the
+ * MappingJackson2HttpMessageConverter https://github.com/swagger-api/swagger-ui/issues/6462
+ * https://github.com/swagger-api/swagger-ui/issues/5356
+ * https://github.com/swagger-api/swagger-ui/issues/9548
+ * https://github.com/swagger-api/swagger-ui/issues/6462
+ * https://github.com/swagger-api/swagger-ui/issues/9548
+ */
+@Configuration
+open class SwaggerBeanConfiguration(converter: MappingJackson2HttpMessageConverter) {
+
+  init {
+    val supportedMediaTypes = ArrayList<MediaType?>(converter.supportedMediaTypes)
+    supportedMediaTypes.add(MediaType("application", "octet-stream"))
+    converter.supportedMediaTypes = supportedMediaTypes
+  }
+}