From cbd864a8e247b964668752e9b500c0f66e26b0e1 Mon Sep 17 00:00:00 2001
From: David Cox <cox.spirail@gmail.com>
Date: Mon, 13 Apr 2020 21:58:00 +0200
Subject: [PATCH] support for multi-part-forms for uploading images

---
 .../WebApi/ObjectDetectionController.cs       | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/src/Alturos.Yolo.WebService/Communication/WebApi/ObjectDetectionController.cs b/src/Alturos.Yolo.WebService/Communication/WebApi/ObjectDetectionController.cs
index 6539b9a..1acfca1 100644
--- a/src/Alturos.Yolo.WebService/Communication/WebApi/ObjectDetectionController.cs
+++ b/src/Alturos.Yolo.WebService/Communication/WebApi/ObjectDetectionController.cs
@@ -1,6 +1,8 @@
 using Alturos.Yolo.Model;
 using Alturos.Yolo.WebService.Contract;
 using System;
+using System.Net.Http;
+using System.Threading.Tasks;
 using System.Web.Http;
 using System.Web.Http.Description;
 
@@ -37,6 +39,40 @@ public IHttpActionResult Detect(byte[] imageData)
             }
         }
 
+        /// <summary>
+        ///  Upload image as multi-part from data 
+        ///  This example can be tested with pastman. http://localhost:8080//ObjectDetection//Upload 
+        ///  Select Body->form data
+        ///  Then select "file" from the key box before typing in (any) key name. Then select your image file in the value. 
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost]
+        [Route("Upload")]
+        [ResponseType(typeof(YoloItem[]))]
+        public async Task<IHttpActionResult> Detect()
+        {
+            // Get the HTTP request
+            //HttpRequestMessage httpRequest = this.Request;
+            var provider = new MultipartMemoryStreamProvider();
+            await Request.Content.ReadAsMultipartAsync(provider);
+
+            // Get the first value from the form
+            var file = provider.Contents[0];
+                        
+            // Read file as bytes
+            var imageData = await file.ReadAsByteArrayAsync();
+            try
+            {
+                // Pass byte array to wrapper
+                var items = this._objectDetection.Detect(imageData);
+                return Ok(items);
+            }
+            catch (Exception exception)
+            {
+                return InternalServerError(exception);
+            }
+        }
+
         /// <summary>
         ///  Detect object positions
         /// </summary>