我在这里学习一点node.js编程并遇到了问题 .
当express获取POST请求时,它应该使用dgram模块通过UDP进行radius验证 . Radius身份验证的响应稍后会出现,但POST请求回调已经退出,req和res变量将丢失,并且无法使用相同的TCP连接进行响应 .
如果我应该等待半径响应(这是非常快)我应该如何在node.js和express中进行等待?
下面的代码执行基本的POST处理和radius验证 .
非常感谢您的任何提示 .
var http = require('http');
var express = require('express');
var bodyParser = require('body-parser');
var radius = require('radius');
var dgram = require('dgram');
var radius_secret = 'really_secret';
var radius_server = '127.0.0.1';
var radius_port = '1812';
function handleAuthentication(req, res) {
console.log("BODY:",req.body);
var client = dgram.createSocket("udp4");
var account = req.body.account;
var password = req.body.password;
var packet = {
code: 'Access-Request',
secret: radius_secret,
identifier: 0,
attributes: [
['NAS-IP-Address', radius_server],
['User-Name', account + "@exampledomain.something"],
['User-Password', password]
]
};
client.on('error', function(e) {
throw e;
});
client.on('message', function(msg, rinfo) {
var radius_response = radius.decode({packet: msg, secret: radius_secret});
console.log(radius_response);
});
var encoded = radius.encode(packet);
client.send(encoded, 0, encoded.length, radius_port, radius_server);
}
var app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false}));
app.post('/authenticate', function(req, res) {
// Authenticate against radius server
handleAuthentication(req, res);
// The radius response is not received yet, and we will exit the post request
// here and loose the req and res.
});
var server = http.createServer(app);
server.listen(80);
1 回答
您需要回复
client
回调 . 因此,例如,在消息后回复:你应该在
error
回调中类似地处理它 .函数结束时
res
和req
不"die",它们仍然可以被作为回调传递的闭包引用 .