Update app.py

app.py

@@ -3,11 +3,18 @@ import os
 import zipfile
 from pathlib import Path
 import tempfile
-import shutil
+import io
+
+# Configure Streamlit to avoid permission issues
+st.set_page_config(
+    page_title="File Extension Converter",
+    page_icon="🔄",
+    layout="wide"
+)
 
 def is_safe_extension(extension):
     """Check if the extension is safe to convert to"""
-    dangerous_extensions = ['.exe', '.bin', '.bat', '.cmd', '.com', '.scr', '.pif', '.vbs', '.js']
+    dangerous_extensions = ['.exe', '.bin', '.bat', '.cmd', '.com', '.scr', '.pif', '.vbs']
     return extension.lower() not in dangerous_extensions
 
 def change_file_extension(file_content, original_name, new_extension):
@@ -26,27 +33,16 @@ def change_file_extension(file_content, original_name, new_extension):
 
 def create_download_zip(files_data):
     """Create a zip file containing all converted files"""
-    # Create a temporary directory
-    with tempfile.TemporaryDirectory() as temp_dir:
-        zip_path = os.path.join(temp_dir, "converted_files.zip")
-        
-        with zipfile.ZipFile(zip_path, 'w') as zipf:
-            for filename, content in files_data:
-                zipf.writestr(filename, content)
-        
-        # Read the zip file content
-        with open(zip_path, 'rb') as f:
-            zip_content = f.read()
+    zip_buffer = io.BytesIO()
+    
+    with zipfile.ZipFile(zip_buffer, 'w', zipfile.ZIP_DEFLATED) as zipf:
+        for filename, content in files_data:
+            zipf.writestr(filename, content)
     
-    return zip_content
+    zip_buffer.seek(0)
+    return zip_buffer.getvalue()
 
 def main():
-    st.set_page_config(
-        page_title="File Extension Converter",
-        page_icon="🔄",
-        layout="wide"
-    )
-    
     st.title("🔄 File Extension Converter")
     st.markdown("Convert any file extension to another (safely)")
     
@@ -100,7 +96,6 @@ def main():
         
         # Process files
         converted_files = []
-        results_data = []
         
         st.header("📁 Conversion Results")
         
@@ -140,15 +135,18 @@ def main():
             )
         else:
             # Multiple files - create zip
-            zip_content = create_download_zip(converted_files)
-            st.download_button(
-                label=f"📥 Download All Files ({len(converted_files)} files)",
-                data=zip_content,
-                file_name="converted_files.zip",
-                mime="application/zip"
-            )
-            
-            st.info(f"💡 {len(converted_files)} files will be downloaded as a ZIP archive")
+            try:
+                zip_content = create_download_zip(converted_files)
+                st.download_button(
+                    label=f"📥 Download All Files ({len(converted_files)} files)",
+                    data=zip_content,
+                    file_name="converted_files.zip",
+                    mime="application/zip"
+                )
+                
+                st.info(f"💡 {len(converted_files)} files will be downloaded as a ZIP archive")
+            except Exception as e:
+                st.error(f"Error creating ZIP file: {str(e)}")
     
     elif uploaded_files and not new_extension:
         st.warning("⚠️ Please enter a target extension")