Fixes #748 (#1261)

* Added support for file upload via REST

* Added support for pushing the filecontents to PS

* Removed some debug logging.

* Should now pass test

src/UniversalDashboard/Controllers/ComponentController.cs

@@ -383,7 +383,7 @@ public async Task<IActionResult> DeleteEndpoint()
 
             SetQueryStringValues(variables);
 
-            if (!await TryProcessBodyAsForm(Request, variables))
+            if (!await TryProcessBodyAsFormOrFile(Request, variables))
             { 
                 //If we made it here we either have a non-form content type
                 //or the request was made with the default content type of form
@@ -402,16 +402,16 @@ public async Task<IActionResult> DeleteEndpoint()
 			return StatusCode(404);
 		}
 
-        private async Task<bool> TryProcessBodyAsForm(HttpRequest request, Dictionary<string,object> variables)
+        private async Task<bool> TryProcessBodyAsFormOrFile(HttpRequest request, Dictionary<string,object> variables)
         {
             if (HttpContext.Request.HasFormContentType)
-            {
+            {     
                 Log.Debug("HasFormContentType");
 
                 var form = await Request.ReadFormAsync(new FormOptions() { BufferBody = true });
 
                 if (form != null && form.Any())
-                {
+                {   
                     foreach (var value in form)
                     {
                         if (value.Value.Count == 1) {
@@ -422,6 +422,29 @@ private async Task<bool> TryProcessBodyAsForm(HttpRequest request, Dictionary<st
                     }
                     return true;
                 }
+		return false;
+            }
+	    if (HttpContext.Request.Method == "POST") {
+                //file upload only avaliable in POST method.
+                if (HttpContext.Request.ContentType.Contains("image/") || HttpContext.Request.ContentType.Contains("file/")) 
+                {
+                    Log.Debug("HasFileOrImageContenttype");
+                    using (MemoryStream stream = new MemoryStream())
+                    {
+                        await HttpContext.Request.Body.CopyToAsync(stream);
+                        if (stream != null) {
+                            variables.Add("File", stream.ToArray());
+                            Log.Debug("File from RESTAPI found.");
+                            return true;
+                        }
+                        else 
+                        {
+                            Log.Debug("Filestream is empty.");
+                            //return it true, to prevent it from processing it as RAW
+                            return true;
+                        }
+                    }
+                }
             }
             return false;
         }
@@ -448,11 +471,12 @@ public async Task<IActionResult> PostEndpoint()
 			var variables = new Dictionary<string, object>();
             SetQueryStringValues(variables);
 
-            if (!await TryProcessBodyAsForm(Request, variables))
+            if (!await TryProcessBodyAsFormOrFile(Request, variables))
             { 
                 //If we made it here we either have a non-form content type
                 //or the request was made with the default content type of form
                 //when it is really something else (probably application/json)
+                Log.Debug("Processing as RAW");
                 ProcessBodyAsRaw(Request, variables);                              
             }
 
@@ -479,7 +503,7 @@ public async Task<IActionResult> PutEndpoint()
 			var variables = new Dictionary<string, object>();
             SetQueryStringValues(variables);
 
-            if (!await TryProcessBodyAsForm(Request, variables))
+            if (!await TryProcessBodyAsFormOrFile(Request, variables))
             {
                 //If we made it here we either have a non-form content type
                 //or the request was made with the default content type of form