fixed closeBrowser

Former-commit-id: 328d66a1ea6a7fa2d40202257d200af1dce41179

cli/back-ends/jsdom.js

@@ -29,8 +29,6 @@ const { JSDOM, VirtualConsole } = require("jsdom");
 const iconv = require("iconv-lite");
 const request = require("request-promise-native");
 
-let win;
-
 exports.initialize = async () => { };
 
 exports.getPageData = async options => {
@@ -43,9 +41,16 @@ exports.getPageData = async options => {
 			"User-Agent": options.userAgent
 		}
 	})).body.toString();
-	const dom = new JSDOM(pageContent, getBrowserOptions(options));
-	win = dom.window;
-	return await getPageData(win, options);
+	let win;
+	try {
+		const dom = new JSDOM(pageContent, getBrowserOptions(options));
+		win = dom.window;
+		return await getPageData(win, options);
+	} finally {
+		if (win) {
+			win.close();
+		}
+	}
 };
 
 async function getPageData(win, options) {
@@ -83,11 +88,7 @@ async function getPageData(win, options) {
 	return pageData;
 }
 
-exports.closeBrowser = () => {
-	if (win) {
-		win.close();
-	}
-};
+exports.closeBrowser = () => { };
 
 function getBrowserOptions(options) {
 	const jsdomOptions = {