我正在使用 Express 将请求代理到一个单独的 API 服务器,该服务器受 OAuth 2 访问 token 保护。当 token 过期时,服务器将返回一个 401,我现在正在我的路由器中间件中处理它,然后去刷新与客户端 session 关联的访问 token (我正在使用 express-session
)。
这是我的代码:
router.js
app.use('/api', require('./routes.js'));
routes.js
var express = require('express'),
router = express.Router(),
routesController = require('./routes.controller.js');
router.route('/*')
.get(routesController.fetch);
routes.controller.js
module.exports.fetch = function(req, res, next) {
var options = helpers.buildAPIRequestOptions(req);
request(options, function(err, response, body){
if(response.statusCode === 401) {
authController.refreshToken(req, res, next);
} else {
res.status(response.statusCode).send(body);
}
});
};
authController
module.exports.refreshToken = function(req, res, next) {
var formData = {
grant_type: 'refresh_token',
refresh_token: req.session.refreshToken,
scope: 'PRODUCTION'
},
headers = {
'Authorization' : 'Basic ' + consts.CLIENT_KEY_SECRET_BASE64_DEV
};
request.post({url:consts.ACCESS_TOKEN_REQUEST_URL_DEV, form:formData, headers: headers, rejectUnauthorized: false}, function(err, response, body){
var responseBody = JSON.parse(body);
if (response.statusCode === 200) {
req.session.accessToken = responseBody.access_token;
req.session.refreshToken = responseBody.refresh_token;
next();
//How to recall the original request made from fetch controller function after this point?
} else {
console.log('SOMETHING ELSE HAPPENED!');
}
});
};
更新 token 后,我想重新发出我在获取 Controller 中使用 request
模块触发的原始 API 请求。
我有点难过我到底是怎么做到的,有没有一种优雅的方法来实现这个目标?
最佳答案
我会把授权 Controller 从中间件变成一个 promise 。然后使 fetch
递归。
routes.controller.js
module.exports.fetch = fetch;
function fetch(req, res, next) {
var options = getSavedOptsFromRequest(req) || helpers.buildAPIRequestOptions(req);
request(options, function(err, response, body){
if(response.statusCode === 401) {
saveOptsToRequest(req, options)
authController.refreshToken(req)
.then(function authOk(){
fetch(req, res, next);
})
.catch(function authKo(){
res.status(500).send('something');
});
} else {
res.status(response.statusCode).send(body);
}
});
};
function saveOptsToRequest(req, options){
req.requestedOptions = options;
}
function getSavedOptsFromRequest(req){
return req.requestedOptions;
}
authController
module.exports.refreshToken = function(req) {
var refreshTokenPromise = new Promise(function (resolve, reject){
var formData = {
grant_type: 'refresh_token',
refresh_token: req.session.refreshToken,
scope: 'PRODUCTION'
},
headers = {
'Authorization' : 'Basic ' + consts.CLIENT_KEY_SECRET_BASE64_DEV
};
request.post({url:consts.ACCESS_TOKEN_REQUEST_URL_DEV, form:formData, headers: headers, rejectUnauthorized: false}, function(err, response, body){
var responseBody = JSON.parse(body);
if (response.statusCode === 200) {
req.session.accessToken = responseBody.access_token;
req.session.refreshToken = responseBody.refresh_token;
resolve();
//How to recall the original request made from fetch controller function after this point?
} else {
console.log('SOMETHING ELSE HAPPENED!');
reject(new Error("Something!!!!"));
}
});
});
return refreshTokenPromise;
};
关于node.js - 在 Node express 中再次调用相同的请求,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36883413/