feat: add fallback mechanism to serve documents locally from mounted directory when S3 redirect fails

crm/views/seller_views.py

@@ -252,7 +252,27 @@ def preview_document(request):
             )
             return redirect(presigned_url)
         except Exception as e:
-            print("S3 redirect helper failed, falling back to mock files:", e)
+            print("S3 redirect helper failed, falling back to local files / mock:", e)
+
+    # Check if file exists locally in the mounted folder
+    base_dir = os.environ.get('UPLOAD_MOUNT_DIR', '/home/ubuntu/mnt/s3files/supplierdocuments')
+    if not os.path.exists('/home/ubuntu/mnt/s3files/supplierdocuments') and not os.environ.get('UPLOAD_MOUNT_DIR'):
+        from django.conf import settings
+        base_dir = os.path.join(settings.BASE_DIR, 'mnt/s3files/supplierdocuments')
+    
+    file_path = os.path.join(base_dir, filename)
+    if os.path.exists(file_path):
+        content_type = 'application/octet-stream'
+        if filename.endswith('.pdf'):
+            content_type = 'application/pdf'
+        elif filename.endswith('.png'):
+            content_type = 'image/png'
+        elif filename.endswith('.jpeg') or filename.endswith('.jpg'):
+            content_type = 'image/jpeg'
+        try:
+            return FileResponse(open(file_path, 'rb'), content_type=content_type)
+        except Exception as e:
+            print("Failed to serve local document file:", e)
 
     if filename.endswith('.pdf'):
         pdf_data = (