<?php
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/*
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Copyright (c) 2013, Marius Cramer, pixcept KG
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of ISPConfig nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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//* The purpose of this library is to provide some general functions.
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//* This class is loaded automatically by the ispconfig framework.
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abstract class ISPConfigRequest {
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/**
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* Get header data and contents from an url
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*
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* Calls an url and returns an array containing the http header and the page content
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*
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* @access public
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* @param string $url the url to call
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* @param string $store_in the file to store the data in instead of returning them
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* @return array The array with header data at index 0 and page content at index 1, returns boolean false on error. If $store_in is set only the headers are returned
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*/
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public static function get_with_headers($url, $store_in = null, $follow_redirects = false, $user_agent = false) {
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if($follow_redirects === true) $follow_redirects = 5;
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elseif($follow_redirects !== false) $follow_redirects--;
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if(!$user_agent) $user_agent = 'pxFW GET proxy';
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$url_info = parse_url($url);
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if(isset($url_info['scheme']) && $url_info['scheme'] == 'https') {
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$port = isset($url_info['port']) ? $url_info['port'] : 443;
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@$fp = fsockopen('tls://' . $url_info['host'], $port, $errno, $errstr, 10);
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} else {
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$port = isset($url_info['port']) ? $url_info['port'] : 80;
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@$fp = fsockopen($url_info['host'], $port, $errno, $errstr, 10);
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}
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if($store_in) {
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$outfp = fopen($store_in, 'w');
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if(!$outfp) return false;
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}
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if($fp) {
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stream_set_timeout($fp, 10);
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$head = 'GET ' . (isset($url_info['path']) ? $url_info['path'] : '/') . (isset($url_info['query']) ? '?' . $url_info['query'] : '');
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$head .= " HTTP/1.0\r\nHost: " . (isset($url_info['host']) ? $url_info['host'] : '') . "\r\n";
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$head .= "User-Agent: " . $user_agent . "\r\n";
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if(isset($url_info['user'])) {
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if(!array_key_exists('pass', $url_info)) $url_info['pass'] = '';
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$head .= "Authorization: basic " . base64_encode($url_info['user'] . ':' . $url_info['pass']) . "\r\n";
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}
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$head .= "Connection: Close\r\n";
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$head .= "Accept: */*\r\n\r\n";
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$data = '';
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$eoheader = false;
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fputs($fp, $head);
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while(!feof($fp)) {
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if($header = fgets($fp, 1024)) {
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if($eoheader == true) {
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if($store_in) fputs($outfp, $header);
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else $data .= $header;
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continue;
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}
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if ($header == "\r\n") {
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$eoheader = true;
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continue;
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} else {
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$header = trim($header);
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}
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$sc_pos = strpos($header, ':');
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if($sc_pos === false) {
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$headers['status'] = $header;
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$headers['http_code'] = intval(preg_replace('/^HTTP\/\d+\.\d+\s+(\d+)\s+.*$/', '$1', $header));
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} else {
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$label = substr($header, 0, $sc_pos);
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$value = substr($header, $sc_pos + 1);
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$headers[strtolower($label)] = trim($value);
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}
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}
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}
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fclose($fp);
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if(isset($headers['http_code']) && isset($headers['location']) && ($headers['http_code'] == 301 || $headers['http_code'] == 302) && $follow_redirects > 0) {
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if($store_in) fclose($outfp);
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return $self::get_with_headers($headers['location'], $store_in, $follow_redirects);
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}
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if($store_in) {
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fclose($outfp);
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$code = intval(preg_replace('/^HTTP\/\d+\.\d+\s+(\d+)\s+.*$/', '$1', $headers['status']));
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if($code != 200) {
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return false;
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}
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return $headers;
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} else {
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return array($headers, $data);
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}
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} else {
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if($store_in) {
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fclose($outfp);
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@unlink($store_in);
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}
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return false;
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}
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}
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/**
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* Gets the content of an url
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*
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* Checks for the php function file_get_contents and uses an alternative if not found
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*
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* @access public
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* @param string $url url to get
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* @return string url data including headers
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* @see file_get_contents
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*/
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public static function get($url) {
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if(function_exists('file_get_contents')) return file_get_contents($url);
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$fp = fopen($url, 'r');
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$data = '';
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while(!feof($fp)) {
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$data .= fgets($fp, 8192);
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}
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fclose($fp);
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return $data;
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}
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/**
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* Make a post request and get data
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*
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* Calls an url with a post request and returns the data - and optionally the header content
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*
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* @access public
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* @param string $url the url to call
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* @param string $data the post data to send
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* @param bool $get_headers if true, the function will return an array like PXUrl::get_with_headers(), otherwise the content is returned as a string
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* @return mixed Content data as string or - if get_headers is true - the array with header data at index 0 and page content at index 1
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* @see get_url_and_headers
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*/
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public static function post($url, $data, $get_headers = false, $user_agent = false) {
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$url_info = parse_url($url);
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if((isset($url_info['scheme']) && $url_info['scheme'] == 'https') || $url_info['port'] == 443) {
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$port = (!isset($url_info['port']) || !$url_info['port'] || $url_info['port'] == 443 || $url_info['port'] == 80) ? 443 : $url_info['port'];
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@$fp = fsockopen('tls://' . $url_info['host'], $port, $errno, $errstr, 10);
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} else {
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$port = isset($url_info['port']) ? $url_info['port'] : 80;
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@$fp = fsockopen($url_info['host'], $port, $errno, $errstr, 10);
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}
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if(!$fp) return '';
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if(!$user_agent) $user_agent = 'pxFW GET proxy';
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$header = 'POST ' . (isset($url_info['path']) ? $url_info['path'] : '/') . (isset($url_info['query']) ? '?' . @$url_info['query'] : '') . " HTTP/1.1\r\n";
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$header .= "Host: " . @$url_info['host'] . "\r\n";
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$header .= "User-Agent: " . $user_agent . "\r\n";
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if(isset($url_info['user'])) {
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if(!array_key_exists('pass', $url_info)) $url_info['pass'] = '';
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$header .= "Authorization: basic " . base64_encode($url_info['user'] . ':' . $url_info['pass']) . "\r\n";
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}
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$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
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$header .= "Content-Length: " . strlen($data) . "\r\n";
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$header .= "Connection: close\r\n\r\n";
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$header .= $data . "\r\n\r\n";
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fwrite($fp, $header);
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$response = '';
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$eoheader = false;
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$header = '';
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$tmpdata = '';
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$chunked = false;
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$chunklen = 0;
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while(!feof($fp)) {
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if($header = @fgets($fp, 1024)) {
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if($eoheader == true) {
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$response .= $header;
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continue;
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}
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if ($header == "\r\n") {
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$eoheader = true;
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continue;
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} else {
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$tmpdata .= $header;
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if(preg_match('/Transfer-Encoding:\s+chunked/i', $tmpdata)) $chunked = true;
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}
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}
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}
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//var_dump($response, $chunked, $header);
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if($chunked == true) {
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$lines = explode("\n", $response);
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$response = '';
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$chunklen = 0;
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foreach($lines as $line) {
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$line .= "\n";
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if($chunklen <= 0) {
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if(preg_match('/^([0-9a-f]+)\s*$/is', $line, $matches)) {
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$chunklen = hexdec($matches[1]);
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}
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continue;
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}
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if(strlen($line) > $chunklen) {
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//echo "Warnung: " . strlen($line) . " > " . $chunklen . "\n";
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$line = substr($line, 0, $chunklen);
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}
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$response .= $line;
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$chunklen -= strlen($line);
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}
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$start = strpos($response, '<?xml');
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$end = strrpos($response, '>');
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if($start !== false && $end !== false) $response = substr($response, $start, $end - $start + 1);
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}
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fclose($fp);
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if($get_headers == true) {
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$tmpheaders = explode("\n", $tmpdata);
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$headers = array();
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foreach($tmpheaders as $cur) {
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if(preg_match('/^(\w+)\:\s*(.*)$/is', $cur, $matches)) {
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$headers["$matches[1]"] = trim($matches[2]);
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}
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}
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return array($headers, $response);
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} else return $response;
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}
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}
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?>
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