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/**
* @copyright 2019 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author John Molakvoæ <skjnldsv@protonmail.com>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
import _ from 'underscore'
import $ from 'jquery'
import OC from './index'
import Notification from './notification'
/**
* Warn users that the connection to the server was lost temporarily
*
* This function is throttled to prevent stacked notfications.
* After 7sec the first notification is gone, then we can show another one
* if necessary.
*/
export const ajaxConnectionLostHandler = _.throttle(() => {
Notification.showTemporary(t('core', 'Connection to server lost'))
}, 7 * 1000, { trailing: false })
/**
* Process ajax error, redirects to main page
* if an error/auth error status was returned.
* @param {XMLHttpRequest} xhr xhr request
*/
export const processAjaxError = xhr => {
// purposefully aborted request ?
// OC._userIsNavigatingAway needed to distinguish ajax calls cancelled by navigating away
// from calls cancelled by failed cross-domain ajax due to SSO redirect
if (xhr.status === 0 && (xhr.statusText === 'abort' || xhr.statusText === 'timeout' || OC._reloadCalled)) {
return
}
if (_.contains([302, 303, 307, 401], xhr.status) && OC.currentUser) {
// sometimes "beforeunload" happens later, so need to defer the reload a bit
setTimeout(function() {
if (!OC._userIsNavigatingAway && !OC._reloadCalled) {
let timer = 0
const seconds = 5
const interval = setInterval(function() {
Notification.showUpdate(n('core', 'Problem loading page, reloading in %n second', 'Problem loading page, reloading in %n seconds', seconds - timer))
if (timer >= seconds) {
clearInterval(interval)
OC.reload()
}
timer++
}, 1000 // 1 second interval
)
// only call reload once
OC._reloadCalled = true
}
}, 100)
} else if (xhr.status === 0) {
// Connection lost (e.g. WiFi disconnected or server is down)
setTimeout(function() {
if (!OC._userIsNavigatingAway && !OC._reloadCalled) {
// TODO: call method above directly
OC._ajaxConnectionLostHandler()
}
}, 100)
}
}
/**
* Registers XmlHttpRequest object for global error processing.
*
* This means that if this XHR object returns 401 or session timeout errors,
* the current page will automatically be reloaded.
*
* @param {XMLHttpRequest} xhr xhr request
*/
export const registerXHRForErrorProcessing = xhr => {
const loadCallback = () => {
if (xhr.readyState !== 4) {
return
}
if ((xhr.status >= 200 && xhr.status < 300) || xhr.status === 304) {
return
}
// fire jquery global ajax error handler
$(document).trigger(new $.Event('ajaxError'), xhr)
}
const errorCallback = () => {
// fire jquery global ajax error handler
$(document).trigger(new $.Event('ajaxError'), xhr)
}
if (xhr.addEventListener) {
xhr.addEventListener('load', loadCallback)
xhr.addEventListener('error', errorCallback)
}
}
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