表达如何将值从 .js 承诺传递到 .ejs 视图

Question

我试图将值从路由 js 文件（auth.js）传递到 ejs 视图（dashboard.ejs）

这是 auth.js 中的代码：

const express = require("express");

const google = require('googleapis').google;

const jwt = require('jsonwebtoken');

const CONFIG = require("../config/passport-google");

const nf = require('node-fetch');

const router = express.Router();

// Google's OAuth2 client

const OAuth2 = google.auth.OAuth2;

router.get("/youtube", function(req, res) {

  // Create an OAuth2 client object from the credentials in our config file

  const oauth2Client = new OAuth2(

    CONFIG.oauth2Credentials.client_id,

    CONFIG.oauth2Credentials.client_secret,

    CONFIG.oauth2Credentials.redirect_uris[0]

  );

  // Obtain the google login link to which we'll send our users to give us access

  const loginLink = oauth2Client.generateAuthUrl({

    access_type: "offline", // Indicates that we need to be able to access data continously without the user constantly giving us consent

    scope: CONFIG.oauth2Credentials.scopes // Using the access scopes from our config file

  });

  return res.render("./home/g-login", { loginLink: loginLink });

});

router.get("/youtube/callback", function(req, res) {

  // Create an OAuth2 client object from the credentials in our config file

  const oauth2Client = new OAuth2(

    CONFIG.oauth2Credentials.client_id,

    CONFIG.oauth2Credentials.client_secret,

    CONFIG.oauth2Credentials.redirect_uris[0]

  );

  if (req.query.error) {

    // The user did not give us permission.

    return res.redirect("/");

  } else {

    oauth2Client.getToken(req.query.code, function(err, token) {

      if (err) return res.redirect("/");

      // Store the credentials given by google into a jsonwebtoken in a cookie called 'jwt'

      res.cookie("jwt", jwt.sign(token, CONFIG.JWTsecret));

diomerda 变量是一个承诺，我已经通过 service.subscriptions 下面的函数渲染视图（它正确地将订阅值发送到仪表板视图），那么我如何也将我的 diomerda 变量传递到该视图？

我正在尝试，module.exports正如您在代码中看到的那样，但似乎我无法require在 ejs 文件内使用

Answer 1

请在下面的代码中找到mark1和mark2。mark1：您不需要导出此方法，只需在渲染 ejs 视图之前使用它即可。当你在这个函数中返回你的json时，你不需要在这里添加额外的await。mark2：我将get_data函数放在这里是因为我看到你在router.get("/youtube/callback"). 因此，在向用户呈现 ejs 视图之前，您需要调用get_data函数来获取所需的数据。然后，只需用数据渲染它即可。router.get("/youtube/callback", function(req, res) {    // Create an OAuth2 client object from the credentials in our config file    const oauth2Client = new OAuth2(      CONFIG.oauth2Credentials.client_id,      CONFIG.oauth2Credentials.client_secret,      CONFIG.oauth2Credentials.redirect_uris[0]    );      if (req.query.error) {      // The user did not give us permission.      return res.redirect("/");    } else {      oauth2Client.getToken(req.query.code, function(err, token) {        if (err) return res.redirect("/");          // Store the credentials given by google into a jsonwebtoken in a cookie called 'jwt'        res.cookie("jwt", jwt.sign(token, CONFIG.JWTsecret));                // return res.redirect("/get_some_data");          if (!req.cookies.jwt) {          // We haven't logged in          return res.redirect("/");        }              // Add this specific user's credentials to our OAuth2 client        oauth2Client.credentials = jwt.verify(req.cookies.jwt, CONFIG.JWTsecret);              // Get the youtube service        const service = google.youtube("v3");          const url = `https://www.googleapis.com/oauth2/v1/userinfo?access_token=${token[Object.keys(token)[0]]}`;          // ================ mark 1 ====================        const get_data = async () => {          try {            const response = await nf(url);            const json = await response.json();            return json;          } catch (error) {            console.log(error);          }        };          // Get 50 of the user's subscriptions (the channels they're subscribed to)        service.subscriptions          .list({            auth: oauth2Client,            mine: true,            part: "snippet,contentDetails",            maxResults: 50          })          // ================ mark 2 ====================          // remember to add async here          .then(async (response) => {              // ================ mark 2 ====================             const diomerda = await get_data()              // Render the profile view, passing the subscriptions to it            return res.render("./user/dashboard", { subscriptions: response.data.items, diomerda: diomerda });          });        });    }  });