我遇到了问题,我的响应函数没有更新变量,它从文件中取出一个元素:
发布功能:
app.post("/profile", function(req, res) {
var id = req.body.playerid;
request("https://statsroyale.com/profile/" + id).pipe(fs.createWriteStream('stats.html'));
var wins1 = document.getElementsByClassName('statistics__metricCounter ui__headerExtraSmall statistics__trophyMetric');
var wins = wins1[0].innerHTML;
res.render("profile", {person: id, wins: wins}); });
jsdom.env函数(在开头一次设置文件):
jsdom.env({
file: 'stats.html',
done: function (err, window) {
GLOBAL.window = window;
GLOBAL.document = window.document;
}
});
但是,如果我请求其他ID,它会显示旧元素
SRC:
var express = require("express");
var app = express();
var bodyParser = require('body-parser')
var request = require("request")
var fs = require("fs");
var $ = require("jquery");
var jsdom
try {
jsdom = require("jsdom/lib/old-api.js"); // jsdom >= 10.x
const { JSDOM } = jsdom;
} catch (e) {
jsdom = require("jsdom"); // jsdom <= 9.x
const { JSDOM } = jsdom;
}
app.use( bodyParser.json() );
app.use(bodyParser.urlencoded({
extended: true
}));
app.set("view engine", "ejs");
app.get("/", function(req, res) {
res.render("home");
});
app.post("/profile", function(req, res) {
var id = req.body.playerid;
jsdom.JSDOM.fromURL("https://statsroyale.com/profile/" + id).then(dom => {
var wins1 = dom.window.document.getElementsByClassName('statistics__metricCounter ui__headerExtraSmall statistics__trophyMetric');
var wins = wins1[0].innerHTML;
res.render("profile", {person: id, wins: wins});
});
});
app.get("/profile", function(req, res) {
var id = req.query.playerid;
res.render("profile", {person: id});
});
app.listen(3000);
答案 0 :(得分:0)
仅设置jsdom
环境一次。您需要使用fs.watchFile()
来跟踪文件发生的任何更改,并在每次调用回调时重新初始化环境。此外,您需要确保
var wins1 = document.getElementsByClassName('statistics__metricCounter ui__headerExtraSmall statistics__trophyMetric');
var wins = wins1[0].innerHTML;
res.render("profile", {person: id, wins: wins}); });
在异步pipe
完成并使用更新的文件重新初始化jsdom
之前,不会调用。
更简单,而不是使用从本地HTML文件you can invoke jsdom
directly from the URL初始化的全局dom
:
jsdom.JSDOM.fromURL("https://statsroyale.com/profile/" + id, options).then(dom => {
var wins1 = dom.window.document.getElementsByClassName('statistics__metricCounter ui__headerExtraSmall statistics__trophyMetric');
var wins = wins1[0].innerHTML;
res.render("profile", {person: id, wins: wins});
});