lmc/login.js

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JavaScript
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/*
* This file is part of Linode Manager Classic.
*
* Linode Manager Classic is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Linode Manager Classic is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Linode Manager Classic. If not, see <https://www.gnu.org/licenses/>.
*/
import { settings, elements, parseParams } from "/global.js";
import { clientID } from "/clientID.js";
(function()
{
// Element names specific to this page
elements.login = "login";
// Data recieved from API calls
var data = {};
// Generate a v4 UUID
var generateUUID = function()
{
var accept = "0123456789abcdef";
var uuid = "";
for (var i = 0; i < 32; i++)
uuid += accept.charAt(Math.floor(Math.random() * accept.length));
uuid = uuid.slice(0, 8) + "-" + uuid.slice(8, 12) + "-" + uuid.slice(12, 16) + "-" + uuid.slice(16, 20) + "-" + uuid.slice(20);
return uuid;
};
// Login to Linode via OAuth
var login = function(event)
{
if (event && event.currentTarget.disabled)
return;
localStorage.state = generateUUID();
var params = new URLSearchParams();
params.set("client_id", clientID);
params.set("scope", "*");
params.set("response_type", "token");
params.set("state", localStorage.state);
location.href = settings.oauthURL + "/authorize" + "?" + params.toString();
};
// Initial setup
var setup = function()
{
// Parse URL parameters
data.params = parseParams();
// If we're being given an access token, store it and redirect
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if (data.params.access_token && data.params.expires_in && data.params.token_type && data.params.state) {
if (localStorage.state && localStorage.state == data.params.state) {
localStorage.removeItem("state");
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var type = data.params.token_type.charAt(0).toUpperCase() + data.params.token_type.slice(1);
localStorage.apiKey = type + " " + data.params.access_token;
localStorage.apiExpire = Date.now() + (data.params.expires_in * 1000);
if (localStorage.redirectTo)
location.href = localStorage.redirectTo;
else
location.href = "/linodes/";
return;
}
// If the returned state doesn't match our local one, scrap everything and start over
alert("Something's fishy here. Let's try again.");
}
// If we already have an unexpired token, redirect
if (localStorage.apiKey && localStorage.apiExpire) {
var now = new Date();
var expires = new Date(parseInt(localStorage.apiExpire));
if (expires > now) {
location.href = "/linodes/";
return;
}
}
// Otherwise, clear everything
localStorage.clear();
// Store our desired redirect
if (data.params.redirectTo)
localStorage.redirectTo = decodeURIComponent(data.params.redirectTo);
// Don't wait for click if we were redirected from another page
if (data.params.skip && data.params.skip == "1")
login(null);
// Register login button handler
var loginButton = document.getElementById(elements.login);
loginButton.addEventListener("click", login);
loginButton.disabled = false;
};
// Attach onload handler
window.addEventListener("load", setup);
})();