examples/ytfeed.dl: toss 404s

examples/ytfeed.dl

@@ -13,9 +13,12 @@ while test -n "$2"; do
 	else curl=false
 	fi
 	filename="$(printf '%s/%s.xml\n' "$directory" "$2")"
-	$curl "$xml_url_prefix""$2" >"$filename".new \
+	$curl "$xml_url_prefix""$2" >"$filename".new
-		&& mv "$filename".new "$filename" \
+	if ! grep '<title>' <"$filename".new | head -n 1 \
-		&& printf '%s\n' "$filename" \
+			| grep 404 >/dev/null 2>&1
-		|| rm -f "$filename".new
+	then mv "$filename".new "$filename" \
+		&& printf '%s\n' "$filename"
+	fi
+	rm -f "$filename".new
 	shift
 done