Update app.py

app.py

@@ -61,10 +61,14 @@ def ingest_sources(files, urls):
     metadata = []
     for f in files:
         name = f.name
-        tmp = tempfile.NamedTemporaryFile(delete=False)
-        tmp.write(f.read())
-        tmp.flush()
-        tmp.close()
+tmp = tempfile.NamedTemporaryFile(delete=False)
+# handle both NamedString and normal file
+if hasattr(f, "read"):
+    tmp.write(f.read())
+else:
+    tmp.write(f.encode("utf-8"))
+tmp.flush()
+tmp.close()
         if name.lower().endswith(".pdf"):
             text = extract_text_from_pdf(tmp.name)
         elif name.lower().endswith(".docx"):