NativeScript/nativescript-core/http/http-request/http-request-common.ts

import * as fsModule from "../../file-system";

export function getFilenameFromUrl(url: string) {
	const fs: typeof fsModule = require("../../file-system");
	const slashPos = url.lastIndexOf("/") + 1;
	const questionMarkPos = url.lastIndexOf("?");

	let actualFileName: string;
	if (questionMarkPos !== -1) {
		actualFileName = url.substring(slashPos, questionMarkPos);
	} else {
		actualFileName = url.substring(slashPos);
	}

	const result = fs.path.join(
		fs.knownFolders.documents().path,
		actualFileName
	);

	return result;
}