drag & drop handling

main.py

@@ -2,7 +2,6 @@
 # Arian Nasr
 # March 6, 2026
 
-
 import os
 from flask import Flask, request, render_template
 from werkzeug.utils import secure_filename
@@ -20,21 +19,16 @@ def allowed_file(filename):
 @app.route('/', methods=['GET', 'POST'])
 def upload_file():
     if request.method == 'POST':
-        if 'file' not in request.files:
-            return render_template('error.html', error_message='No file part in the request'), 400
-        files = request.files.getlist('file')
-        for file in files:
-            if file.filename == '':
-                return render_template('error.html', error_message='No selected file'), 400
-            if file and allowed_file(file.filename):
+        for key, file in request.files.items():
+            if key.startswith('file') and file and allowed_file(file.filename) and file.filename != '':
                 filename = secure_filename(file.filename)
                 file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
             else:
-                return render_template('error.html', error_message=f'File "{file.filename}" is not allowed. Allowed types: {", ".join(ALLOWED_EXTENSIONS)}'), 400
+                return render_template('error.html', error_message=f'File is not allowed.'), 400
 
-        return render_template('success.html', success_message=f'{len(files)} file(s) uploaded successfully!')
+        return render_template('success.html', success_message=f'{len(request.files)} file(s) uploaded successfully!'), 200
 
-    return render_template('index.html')
+    return render_template('index.html'), 200
 
 
 if __name__ == '__main__':