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const express = require("express");
const app = express();
var path = require('path');
const XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest
const rabbitmq_url = process.env.RABBITMQ_URL;
const proxied_rabbitmq_url = process.env.PROXIED_RABBITMQ_URL;
const client_id = process.env.CLIENT_ID;
const client_secret = process.env.CLIENT_SECRET;
const uaa_url = process.env.UAA_URL;
const port = process.env.PORT || 3000;
app.engine('.html', require('ejs').__express);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'html');
app.get('/', function(req, res){
let id = default_if_blank(req.query.client_id, client_id);
let secret = default_if_blank(req.query.client_secret, client_secret);
res.render('rabbitmq', {
proxied_url: proxied_rabbitmq_url,
url: rabbitmq_url.replace(/\/?$/, '/') + "login",
name: rabbitmq_url + " for " + id,
access_token: access_token(id, secret)
});
});
app.get('/favicon.ico', (req, res) => res.status(204));
app.listen(port);
console.log('Express started on port ' + port);
function default_if_blank(value, defaultValue) {
if (typeof value === "undefined" || value === null || value == "") {
return defaultValue;
} else {
return value;
}
}
function access_token(id, secret) {
const req = new XMLHttpRequest();
const url = uaa_url + '/oauth/token';
const params = 'client_id=' + id +
'&client_secret=' + secret +
'&grant_type=client_credentials' +
'&token_format=jwt' +
'&response_type=token';
console.debug("Sending " + url + " with params "+ params);
req.open('POST', url, false);
req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
req.setRequestHeader('Accept', 'application/json');
req.send(params);
if (req.status == 200) {
const token = JSON.parse(req.responseText).access_token;
console.log("Token => " + token)
return token;
} else {
throw new Error(req.status + " : " + req.responseText);
}
}
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