From ee81d4b967ccc81c4ed912de85ab741485851cfc Mon Sep 17 00:00:00 2001
From: Maksym Tsymbarov <mtsymbarov@thingsboard.io>
Date: Wed, 29 Apr 2026 14:28:07 +0200
Subject: [PATCH] Fixed

---
 .../shared/components/file-input.component.ts | 86 ++++++++-----------
 1 file changed, 34 insertions(+), 52 deletions(-)

diff --git a/ui-ngx/src/app/shared/components/file-input.component.ts b/ui-ngx/src/app/shared/components/file-input.component.ts
index c7c977311e..51b3fec787 100644
--- a/ui-ngx/src/app/shared/components/file-input.component.ts
+++ b/ui-ngx/src/app/shared/components/file-input.component.ts
@@ -205,45 +205,40 @@ export class FileInputComponent extends PageComponent implements AfterViewInit,
 
   private readerAsFile(file: flowjs.FlowFile): Promise<any> {
     return new Promise((resolve) => {
-      if (this.readAsBinary) {
-       const reader = new FileReader();
-        reader.onload = () => {
-          let fileName = null;
-          let fileContent = null;
-          let files = null;
-          let mediaType = null;
-          if (reader.readyState === reader.DONE) {
-            if (!this.workFromFileObj) {
-              fileContent = reader.result;
-              if (fileContent && fileContent.length > 0) {
-                if (this.contentConvertFunction) {
-                  fileContent = this.contentConvertFunction(fileContent as string);
-                }
-                fileName = fileContent ? file.name : null;
-                mediaType = file?.file?.type || null;
-              }
-            } else if (file.name || file.file) {
-              files = file.file;
-              fileName = file.name;
-              mediaType = file.file.type || null;
+      if (this.workFromFileObj) {
+        resolve({
+          fileContent: null,
+          fileName: file.name,
+          files: file.file,
+          mediaType: file.file?.type || null
+        });
+        return;
+      }
+
+      const reader = new FileReader();
+      reader.onload = () => {
+        let fileName = null;
+        let fileContent = null;
+        let mediaType = null;
+        if (reader.readyState === reader.DONE) {
+          fileContent = reader.result;
+          if (fileContent && fileContent.length > 0) {
+            if (this.contentConvertFunction) {
+              fileContent = this.contentConvertFunction(fileContent);
             }
+            fileName = fileContent ? file.name : null;
+            mediaType = file?.file?.type || null;
           }
-          resolve({fileContent, fileName, files, mediaType});
-        };
-        reader.onerror = () => {
-          resolve({fileContent: null, fileName: null, files: null, mediaType: null});
-        };
+        }
+        resolve({fileContent, fileName, files: null, mediaType});
+      };
+      reader.onerror = () => {
+        resolve({fileContent: null, fileName: null, files: null, mediaType: null});
+      };
+
+      if (this.readAsBinary) {
         reader.readAsBinaryString(file.file);
       } else {
-        if (this.workFromFileObj) {
-          resolve({
-            fileContent: null,
-            fileName: file.name,
-            files: file.file,
-            mediaType: file.file?.type || null
-          });
-          return;
-        }
         file.file.arrayBuffer().then(buf => {
           const bytes = new Uint8Array(buf);
           let text: string;
@@ -252,26 +247,13 @@ export class FileInputComponent extends PageComponent implements AfterViewInit,
           } catch {
             text = new TextDecoder('iso-8859-1').decode(bytes);
           }
-
-          let fileContent: any = text && text.length > 0 ? text : null;
-          let fileName: string = null;
-          const mediaType: string = file?.file?.type || null;
-
-          if (fileContent) {
-            if (this.contentConvertFunction) {
-              fileContent = this.contentConvertFunction(fileContent);
-            }
-            fileName = fileContent ? file.name : null;
-          }
-
-          resolve({fileContent, fileName, files: null, mediaType});
-        }).catch(() => {
-          resolve({fileContent: null, fileName: null, files: null, mediaType: null});
-        });
+           Object.defineProperty(reader, 'readyState', {value: FileReader.DONE, configurable: true});
+          Object.defineProperty(reader, 'result',    {value: text,            configurable: true});
+          reader.onload(new ProgressEvent('load'));
+        }).catch(() => reader.onerror(new ProgressEvent('error')));
       }
     });
   }
-
   private checkMaxSize(file: flowjs.FlowFile): boolean {
     return !this.maxSizeByte || file.size <= this.maxSizeByte;
   }