如何在路由获取令牌之前使用身份验证的中间件

Question

我该如何解决这个问题？我想在路由器中获取令牌，然后路由器在此中间件中发送 response.but 我的代码在路由后获取令牌 called.and 如何访问中间件令牌以验证用户

var express = require("express");
var request = require("request");
var router = express.Router();
var supertoken;
tokenmiddleware = function(req, res, next) {
  console.log("this is auth middleware");
  try {
    var options = {
        method: "POST",
        url: "here is my auth server url",
        headers: {
          json: true,
          Authorization: "", //
          "Content-Type": "application/x-www-form-urlencoded"
        }
      },
      form: {
        grant_type: "password",
        username: "usrename",
        password: "password"
      };
    request(options, function(error, response, body1) {
      if (error) {
        throw new Error(error);
      } else {
        let info = JSON.parse(body1);
        //it parse the body1 into json so we can use property of body1.
        supertoken = info.access_token; //it gives the token of the super admin.
        // console.log(supertoken)
        // console.log(process.env.ACCESS_TOKEN);
        //return supertoken
      }
    });
    console.log("superrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr");
    console.log(supertoken);
    next();
  } catch (error) {
    return res.status(401).json({ message: "Auth Failed." });
  }
}; //this middleware gave me a token.



router.post("/verifyUser", tokenmiddleware, (req, res) => {
  //here i want my middleware token (but it calls after the route)
  //here i applied logic of verify user but token is not working.(it say's undefined)
});

Answer 1

您的中间件包含请求，这是一个异步操作。你在请求回调之外调用 next() 。在你的中间件调用你在请求完成之前触发 next() 之后，只需将 next 移入请求回调

    tokenmiddleware = function (req, res, next) {
      console.log('this is auth middleware');
      try {
        var options = {
          method: 'POST',
          url: 'here is my auth server url',
          headers: {
            json: true,
            Authorization: '', //
            'Content-Type': 'application/x-www-form-urlencoded',
          },
          form: {
            grant_type: 'password',
            username: 'usrename',
            password: 'password',
          },
        };
        request(options, function(error, response, body1) {
          if (error) {
            throw new Error(error);
          } else {
            let info = JSON.parse(body1);
            //it parse the body1 into json so we can use property of body1.
            supertoken = info.access_token; //it gives the token of the super admin.
            // console.log(supertoken)
            console.log('superrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr');
            console.log(supertoken);
            req.userToken = info.access_token;
            next();
          }
        });
      } catch (error) {
        return res.status(401).json({ message: 'Auth Failed.' });
      }
    };

router.post("/verifyUser", tokenmiddleware, (req, res) => {
  console.log(req.userToken); // should be your token
});

如何在路由获取令牌之前使用身份验证的中间件

how to use middleware of the auth before route to get token

javascript

authentication

middleware

node.js

express