mirror of
https://github.com/ONLYOFFICE/document-server-integration.git
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78 lines
2.0 KiB
PHP
78 lines
2.0 KiB
PHP
<?php
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/**
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* (c) Copyright Ascensio System SIA 2023
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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require dirname(__FILE__) . '/config.php';
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/**
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* Check if the request is an AJAX request
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*
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* @return bool
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*/
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function is_ajax()
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{
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return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && mb_strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest';
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}
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/**
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* Get the http origin
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*
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* @return string
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*/
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function get_http_origin()
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{
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$origin = '';
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if (!empty($_SERVER['HTTP_ORIGIN'])) {
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$origin = $_SERVER['HTTP_ORIGIN'];
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}
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return $origin;
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}
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/**
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* Set headers that prevent caching in all the browsers
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*
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* @return void
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*/
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function nocache_headers()
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{
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$headers = [
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'Expires' => 'Wed, 11 Jan 1984 05:00:00 GMT',
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'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
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'Pragma' => 'no-cache',
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];
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$headers['Last-Modified'] = false;
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unset($headers['Last-Modified']);
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// In PHP 5.3+, make sure we are not sending a Last-Modified header.
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if (function_exists('header_remove')) {
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@header_remove('Last-Modified');
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} else {
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// In PHP 5.2, send an empty Last-Modified header, but only as a
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// last resort to override a header already sent. #WP23021
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foreach (headers_list() as $header) {
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if (0 === mb_stripos($header, 'Last-Modified')) {
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$headers['Last-Modified'] = '';
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break;
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}
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}
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}
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foreach ($headers as $name => $field_value) {
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@header("{$name}: {$field_value}");
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}
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}
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