Fix: Add URL validation and protocol check

app.py

@@ -136,14 +136,17 @@ with tab1:
         if input_type == "URL":
             source_url = st.text_input("Enter Content URL", placeholder="https://example.com/blog-post")
             if st.button("Fetch Content"):
-                with st.spinner("Extracting content..."):
-                    extracted_data = ContentExtractor.from_url(source_url)
-                    if "error" in extracted_data:
-                        st.error(f"Failed to fetch content: {extracted_data['error']}")
-                        extracted_data = None
-                    else:
-                        st.session_state.extracted_content = extracted_data
-                        st.success("Content fetched successfully!")
+                if not source_url or "://" not in source_url:
+                    st.error("Please enter a valid URL (including https://)")
+                else:
+                    with st.spinner("Extracting content..."):
+                        extracted_data = ContentExtractor.from_url(source_url)
+                        if "error" in extracted_data:
+                            st.error(f"Failed to fetch content: {extracted_data['error']}")
+                            extracted_data = None
+                        else:
+                            st.session_state.extracted_content = extracted_data
+                            st.success("Content fetched successfully!")
 
         elif input_type == "RSS Feed":
             rss_url = st.text_input("Enter RSS Feed URL", placeholder="https://example.com/feed")