diff options
Diffstat (limited to 'modules/gallery/helpers/MY_remote.php')
| -rw-r--r-- | modules/gallery/helpers/MY_remote.php | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/modules/gallery/helpers/MY_remote.php b/modules/gallery/helpers/MY_remote.php new file mode 100644 index 00000000..4abf5bf1 --- /dev/null +++ b/modules/gallery/helpers/MY_remote.php @@ -0,0 +1,163 @@ +<?php defined("SYSPATH") or die("No direct script access."); +/** + * Gallery - a web based photo album viewer and editor + * Copyright (C) 2000-2009 Bharat Mediratta + * + * This program 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 2 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. + */ +class remote extends remote_Core { + + static function post($url, $post_data_array, $extra_headers=array()) { + $post_data_raw = self::_encode_post_data($post_data_array, $extra_headers); + + /* Read the web page into a buffer */ + list ($response_status, $response_headers, $response_body) = + self::do_request($url, 'POST', $extra_headers, $post_data_raw); + + return array($response_body, $response_status, $response_headers); + } + + static function success($response_status) { + return preg_match("/^HTTP\/\d+\.\d+\s2\d{2}(\s|$)/", trim($response_status)); + } + + /** + * Encode the post data. For each key/value pair, urlencode both the key and the value and then + * concatenate together. As per the specification, each key/value pair is separated with an + * ampersand (&) + * @param array $post_data_array the key/value post data + * @param array $extra_headers extra headers to pass to the server + * @return string the encoded post data + */ + private static function _encode_post_data($post_data_array, &$extra_headers) { + $post_data_raw = ''; + foreach ($post_data_array as $key => $value) { + if (!empty($post_data_raw)) { + $post_data_raw .= '&'; + } + $post_data_raw .= urlencode($key) . '=' . urlencode($value); + } + + $extra_headers['Content-Type'] = 'application/x-www-form-urlencoded'; + $extra_headers['Content-Length'] = strlen($post_data_raw); + + return $post_data_raw; + } + + /** + * A single request, without following redirects + * + * @todo: Handle redirects? If so, only for GET (i.e. not for POST), and use G2's WebHelper_simple::_parseLocation logic. + */ + static function do_request($url, $method='GET', $headers=array(), $body='') { + /* Convert illegal characters */ + $url = str_replace(' ', '%20', $url); + + $url_components = self::_parse_url_for_fsockopen($url); + $handle = fsockopen( + $url_components['fsockhost'], $url_components['port'], $errno, $errstr, 5); + if (empty($handle)) { + // log "Error $errno: '$errstr' requesting $url"; + return array(null, null, null); + } + + $header_lines = array('Host: ' . $url_components['host']); + foreach ($headers as $key => $value) { + $header_lines[] = $key . ': ' . $value; + } + + $success = fwrite($handle, sprintf("%s %s HTTP/1.0\r\n%s\r\n\r\n%s", + $method, + $url_components['uri'], + implode("\r\n", $header_lines), + $body)); + if (!$success) { + // Zero bytes written or false was returned + // log "fwrite failed in requestWebPage($url)" . ($success === false ? ' - false' : '' + return array(null, null, null); + } + fflush($handle); + + /* + * Read the status line. fgets stops after newlines. The first line is the protocol + * version followed by a numeric status code and its associated textual phrase. + */ + $response_status = trim(fgets($handle, 4096)); + if (empty($response_status)) { + // 'Empty http response code, maybe timeout' + return array(null, null, null); + } + + /* Read the headers */ + $response_headers = array(); + while (!feof($handle)) { + $line = trim(fgets($handle, 4096)); + if (empty($line)) { + break; + } + + /* Normalize the line endings */ + $line = str_replace("\r", '', $line); + + list ($key, $value) = explode(':', $line, 2); + if (isset($response_headers[$key])) { + if (!is_array($response_headers[$key])) { + $response_headers[$key] = array($response_headers[$key]); + } + $response_headers[$key][] = trim($value); + } else { + $response_headers[$key] = trim($value); + } + } + + /* Read the body */ + $response_body = ''; + while (!feof($handle)) { + $response_body .= fread($handle, 4096); + } + fclose($handle); + + return array($response_status, $response_headers, $response_body); + } + + /** + * Prepare for fsockopen call. + * @param string $url + * @return array url components + * @access private + */ + private static function _parse_url_for_fsockopen($url) { + $url_components = parse_url($url); + if (strtolower($url_components['scheme']) == 'https') { + $url_components['fsockhost'] = 'ssl://' . $url_components['host']; + $default_port = 443; + } else { + $url_components['fsockhost'] = $url_components['host']; + $default_port = 80; + } + if (empty($url_components['port'])) { + $url_components['port'] = $default_port; + } + if (empty($url_components['path'])) { + $url_components['path'] = '/'; + } + $uri = $url_components['path'] + . (empty($url_components['query']) ? '' : '?' . $url_components['query']); + /* Unescape ampersands, since if the url comes from form input it will be escaped */ + $url_components['uri'] = str_replace('&', '&', $uri); + return $url_components; + } +} + |