mirror of
https://github.com/ONLYOFFICE/document-server-integration.git
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65 lines
1.8 KiB
PHP
65 lines
1.8 KiB
PHP
<?php
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/**
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*
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* (c) Copyright Ascensio System SIA 2021
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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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*/
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require( dirname(__FILE__) . '/config.php' );
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// check if the request is an AJAX request
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function is_ajax() {
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return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest';
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}
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// get the http origin
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function get_http_origin() {
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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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return $origin;
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}
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// set headers that prevent caching in all the browsers
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function nocache_headers() {
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$headers = array(
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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 === 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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