walnut.js/lib/com.daplie.walnut.current/oauth3.js

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(function () {
'use strict';
console.log('[DAPLIE oauth3.js]');
console.log(window.location);
var iter = 0;
function main() {
var rpc = {};
//var myself = location.protocol + '//' + location.host + location.pathname;
var incoming;
var forwarding = {};
var anchor;
var err;
var browserState;
var browserCallback;
var action;
function parseParams() {
var params = {};
function parseParamsString(str) {
str.substr(1).split('&').filter(function (el) { return el; }).forEach(function (pair) {
pair = pair.split('=');
var key = decodeURIComponent(pair[0]);
var val = decodeURIComponent(pair[1]);
if (params[key]) {
console.warn("overwriting key '" + key + "' '" + params[key] + "'");
}
params[key] = val;
});
}
anchor = document.createElement('a');
anchor.href = window.location.href;
parseParamsString(anchor.search);
parseParamsString(anchor.hash);
return params;
}
function querystringify(params) {
var arr = [];
Object.keys(params).forEach(function (k) {
arr.push(encodeURIComponent(k) + '=' + encodeURIComponent(params[k]));
});
return arr.join('&');
}
function phoneAway(/*redirectURi, params*/) {
// TODO test for ? / #
window.location.href = incoming.redirect_uri + '#' + querystringify(forwarding);
}
function lintAndSetRedirectable(browserState, params) {
if (!params.redirect_uri) {
window.alert('redirect_uri not defined');
err = new Error('redirect_uri not defined');
console.error(err.message);
console.warn(err.stack);
params.redirect_uri = document.referer;
return false;
}
if (!browserState) {
forwarding.error = "E_NO_BROWSER_STATE";
forwarding.error_description = "you must specify a state parameter";
return false;
}
localStorage.setItem('oauth3.states.' + browserState, JSON.stringify(params));
return true;
}
function redirectCallback() {
var redirect_uri = incoming.redirect_uri;
forwarding.callback = browserState;
forwarding.action = 'close';
var url = redirect_uri + '#' + querystringify(forwarding);
console.log('[debug] redirect_uri + params:', url);
window.location.href = url;
setTimeout(function () {
if (iter >= 3) {
console.log("dancing way too much... stopping now");
return;
}
iter += 1;
console.log("I'm dancing by myse-e-elf");
// in case I'm redirecting to myself
main();
}, 0);
}
rpc = {};
// Act as a provider and log the user out
rpc.logout = function (browserState, incoming) {
var url;
if (!lintAndSetRedirectable(browserState, incoming)) {
// TODO fail
}
localStorage.setItem('oauth3.states.' + browserState, JSON.stringify(incoming));
url = '/#/logout/' + browserState;
// TODO specify specific account or all?
window.location.href = url;
setTimeout(function () {
// in case I'm redirecting to myself
main();
}, 0);
};
// Act as a provider and inform the consumer the logout is complete
rpc.logout_callback = function (browserState/*, incoming*/) {
// TODO pass redirect_uri and state through here so we can avoid localStorage
var forwarding = {};
var originalRequest;
if (!browserState) {
forwarding.error = "E_NO_BROWSER_STATE";
forwarding.error_description = "you must specify a state parameter";
if (incoming.redirect_uri) {
phoneAway(incoming.redirect_uri, forwarding);
}
return;
}
originalRequest = JSON.parse(localStorage.getItem('oauth3.states.' + browserState));
forwarding.action = 'close';
forwarding.state = browserState;
//phoneAway(originalRequest.redirect_uri, forwarding);
window.location.href = originalRequest.redirect_uri + '#' + querystringify(forwarding);
};
rpc.directives = function (browserState, incoming) {
if (!lintAndSetRedirectable(browserState, incoming)) {
phoneAway();
return;
}
var updatedAt = new Date(localStorage.getItem('oauth3.directives.updated_at')).valueOf();
var fresh = (Date.now() - updatedAt) < (24 * 60 * 60 * 1000);
var directives = localStorage.getItem('oauth3.directives');
var redirected = false;
function redirectIf() {
if (redirected) {
return;
}
redirected = true;
redirectCallback();
}
if (directives) {
forwarding.directives = directives;
redirectIf();
if (fresh) {
return;
}
}
var req = new XMLHttpRequest();
req.open('GET', 'oauth3.json', true);
req.addEventListener('readystatechange', function () {
if (4 !== req.readyState) {
return;
}
if (200 !== req.status) {
forwarding.error = "E_STATUS_" + req.status;
forwarding.error_description = "expected 200 OK json or text response for oauth3.json but got '" + req.status + "'";
redirectIf();
return;
}
try {
directives = btoa(JSON.stringify(JSON.parse(req.responseText)));
forwarding.directives = directives;
forwarding.callback = browserState;
localStorage.setItem('oauth3.directives', directives);
localStorage.setItem('oauth3.directives.updated_at', new Date().toISOString());
} catch(e) {
forwarding.error = "E_PARSE_JSON";
forwarding.error_description = e.message;
console.error(forwarding.error);
console.error(forwarding.error_description);
console.error(req.responseText);
}
redirectIf();
});
req.send();
};
// the provider is contacting me
rpc.close = function (browserState, incoming) {
incoming.callback = browserState;
catchAll();
};
// the provider is contacting me
rpc.redirect = function (/*browserState, incoming*/) {
catchAll();
};
function catchAll() {
function phoneHome() {
if (browserCallback === 'completeLogin') {
// Deprecated
(window.opener||window.parent).completeLogin(null, null, incoming);
} else {
console.log('I would be closed by my parent now');
(window.opener||window.parent)['__oauth3_' + browserCallback](incoming);
}
}
if (!(incoming.browser_state || incoming.state)) {
window.alert("callback URLs should include 'browser_state' (authorization code)"
+ " or 'state' (implicit grant))");
}
setTimeout(function () {
// opener is for popup window, new tab
// parent is for iframe
phoneHome();
}, 10);
// iOS Webview (namely Chrome) workaround
setTimeout(function () {
console.log('I would close now');
window.open('', '_self', '');
window.close();
}, 50);
setTimeout(function () {
var i;
var len = localStorage.length;
var key;
var json;
var fresh;
for (i = 0; i < len; i += 1) {
key = localStorage.key(i);
// TODO check updatedAt
if (/^oauth3\./.test(key)) {
try {
json = localStorage.getItem(key);
if (json) {
json = JSON.parse(json);
}
} catch (e) {
// ignore
json = null;
}
fresh = json && (Date.now() - json.updatedAt < (5 * 60 * 1000));
if (!fresh) {
localStorage.removeItem(key);
}
}
}
forwarding.updatedAt = Date.now();
localStorage.setItem('oauth3.' + (forwarding.browser_state || forwarding.state), JSON.stringify(forwarding));
}, 0);
}
function parseAction(params) {
if (params.action) {
return params.action;
}
if (params.close) {
return 'close';
}
if (params.logout_callback) {
return 'logout_callback';
}
if (params.logout) {
return 'logout';
}
if (params.callback) {
return 'close';
}
if (params.directives) {
return 'directives';
}
return 'redirect';
}
incoming = parseParams();
browserState = incoming.browser_state || incoming.state;
action = parseAction(incoming);
forwarding.url = window.location.href;
forwarding.browser_state = browserState;
forwarding.state = browserState;
if (!incoming.provider_uri) {
browserCallback = incoming.callback || browserState;
} else {
// deprecated
browserCallback = 'completeLogin';
}
console.log('[debug]', action, incoming);
if (rpc[action]) {
rpc[action](browserState, incoming);
} else {
window.alert('unsupported action');
}
}
main();
}());