mirror of
https://github.com/gtbu/Typesetter-5.3-p8.git
synced 2024-11-14 02:39:19 +01:00
872 lines
22 KiB
PHP
872 lines
22 KiB
PHP
<?php
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namespace gp\tool{
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defined('is_running') or die('Not an entry point...');
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class RemoteGet{
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public static $redirected;
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public static $maxlength = -1; // The maximum bytes to read. eg: stream_get_contents($handle, $maxlength)
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public static $debug;
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public static $methods = array('stream','curl','fopen','fsockopen');
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protected $url_array = array();
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protected $body = '';
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protected $headers = '';
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protected $bytes_written_total = 0;
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/* determine if the functions exist for fetching remote files,
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* test is done in order of preference
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*
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* notes from wordpress http.php
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* The order for the GET/HEAD requests are Streams, HTTP Extension, Fopen,
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* and finally Fsockopen. fsockopen() is used last, because it has the most
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* overhead in its implementation. There isn't any real way around it, since
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* redirects have to be supported, much the same way the other transports
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* also handle redirects.
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*
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* @return mixed string indicates the method, False indicates it's not compatible
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*/
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public static function Test(){
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foreach(static::$methods as $method){
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if( static::Supported($method) ){
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return $method;
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}
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}
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return false;
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}
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/**
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* Determine if a specific method is supported
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*
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*/
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public static function Supported($method){
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if( \gp\tool::IniGet('safe_mode') ){
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return false;
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}
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switch($method){
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case 'fsockopen':
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return function_exists('fsockopen');
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case 'curl';
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return function_exists('curl_init') && function_exists('curl_exec');
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}
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//stream and fopen
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return \gp\tool::IniGet('allow_url_fopen');
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}
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/**
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* Return response only if successful, otherwise return false
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*
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*/
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public static function Get_Successful($url,$args=array()){
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$getter = new \gp\tool\RemoteGet();
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$result = $getter->Get($url,$args);
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if( is_array($result) ){
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if( (int)$result['response']['code'] >= 200 && (int)$result['response']['code'] < 300 ){
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return $result['body'];
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}
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}
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return false;
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}
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/**
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* Attempt to get the resource at $url
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* Loop through all potential methods until successful
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*/
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public function Get($url,$args=array()){
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static::$debug = array();
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static::$debug['Redir'] = 0;
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static::$debug['FailedMethods'] = '';
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static::$debug['NotSupported'] = '';
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static::$redirected = null;
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return $this->_get($url,$args);
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}
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protected function _get($url, $args = array()){
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//reset body, headers, bytes_written. Important for redirection, multiple requests using same object
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$this->body = '';
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$this->headers = '';
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$this->bytes_written_total = 0;
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//$url = rawurldecode($url);
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$url = str_replace(' ','%20',$url); //spaces in the url can make the request fail
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$url = static::FixScheme($url);
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$this->url_array = static::ParseUrl($url);
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if( $this->url_array === false ){
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return false;
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}
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//arguments
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$defaults = array(
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'method' => 'GET',
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'timeout' => 5,
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'redirection' => 5,
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'httpversion' => '1.0',
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'user-agent' => 'Mozilla/5.0 (Typesetter RemoteGet) ',
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'ignore_errors' => false,
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//could be added
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//'blocking' => true,
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//'headers' => array(),
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//'body' => null,
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//'cookies' => array(),
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);
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$args += $defaults;
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foreach(static::$methods as $method){
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if( !static::Supported($method) ){
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static::$debug['NotSupported'] .= $method.',';
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continue;
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}
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$result = $this->GetMethod($method,$url,$args);
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if( $result === false ){
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static::$debug['FailedMethods'] .= $method.',';
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return false;
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}
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static::$debug['Method'] = $method;
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static::$debug['Len'] = strlen($result['body']);
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return $result;
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}
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return false;
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}
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public function GetMethod($method,$url,$args=array()){
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$func = $method.'_request';
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if( method_exists($this,$func) ){
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return $this->$func( $url, $args );
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}
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return false;
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}
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/**
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* Fetch a url using php's stream_get_contents() function
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*
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*/
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public function stream_request($url,$r){
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$arrContext = $this->stream_context($url,$r);
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$context = stream_context_create($arrContext);
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$handle = fopen($url, 'r', false, $context);
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if( $handle === false ){
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static::$debug['stream'] = 'no handle';
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return false;
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}
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static::stream_timeout($handle,$r['timeout']);
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$strResponse = stream_get_contents($handle, static::$maxlength);
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$theHeaders = static::StreamHeaders($handle);
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fclose($handle);
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$processedHeaders = static::processHeaders($theHeaders);
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$this->body = static::chunkTransferDecode($strResponse,$processedHeaders);
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return $this->ReturnRequest( $url, $r, $processedHeaders );
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}
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/**
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* Create context array
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*
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*/
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public function stream_context($url,$r){
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//create context
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$arrContext = array();
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$arrContext['http'] = array(
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'method' => 'GET',
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'user_agent' => $r['user-agent'],
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'max_redirects' => $r['redirection'],
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'protocol_version' => (float) $r['httpversion'],
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'timeout' => $r['timeout'],
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'ignore_errors' => $r['ignore_errors'],
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);
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if( isset($r['http']) ){
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$arrContext['http'] = $r['http'] + $arrContext['http'];
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}
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if( isset($r['headers']) ){
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$arrContext['http']['header'] = '';
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foreach($r['headers'] as $hk => $hv){
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$arrContext['http']['header'] .= $hk.': '.$hv."\r\n";
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}
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$arrContext['http']['header'] = trim($arrContext['http']['header']);
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}
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return $arrContext;
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}
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/**
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* Fetch a url using php's fopen() function
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*
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*/
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public function fopen_request($url,$r){
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$handle = fopen($url, 'r');
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if( $handle === false ){
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static::$debug['fopen'] = 'no handle';
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return false;
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}
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static::stream_timeout($handle,$r['timeout']);
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$strResponse = $this->ReadHandle($handle);
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$theHeaders = static::StreamHeaders($handle);
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fclose($handle);
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$processedHeaders = static::processHeaders($theHeaders);
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$this->body = static::chunkTransferDecode($strResponse,$processedHeaders);
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return $this->ReturnRequest( $url, $r, $processedHeaders );
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}
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/**
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* Parse a URL and return its components
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*
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*/
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public static function ParseUrl($url){
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$arr_url = parse_url($url);
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if( is_array($arr_url) ){
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$arr_url += array('path'=>'');
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}elseif( \gp\tool::LoggedIn() ){
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trigger_error('invalid url: '.$url.' '.pre($url));
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}
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return $arr_url;
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}
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/**
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* Make sure the url has an http or https scheme
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*
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*/
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public static function FixScheme($url){
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preg_match('#^[a-z]+:#',$url,$match);
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if( empty($match) ){
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return 'http://'.$url;
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}
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$match[0] = strtolower($match[0]);
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if( $match[0] !== 'http:' && $match[0] !== 'https:' ){
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$url = substr($url,strlen($match[0]));
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$url = 'http://'.ltrim($url,'/');
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}
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return $url;
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}
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/**
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* Fetch a url using php's fsockopen() function
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*
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*/
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public function fsockopen_request($url,$r){
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$fsockopen_host = $this->url_array['host'];
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//fsockopen has issues with 'localhost' with IPv6 with certain versions of PHP, It attempts to connect to ::1,
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// which fails when the server is not setup for it. For compatibility, always connect to the IPv4 address.
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if ( 'localhost' == strtolower($fsockopen_host) )
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$fsockopen_host = '127.0.0.1';
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$iError = null; // Store error number
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$strError = null; // Store error string
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$port = 80;
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if( !empty($this->url_array['port']) ){
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$port = 80;
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}
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$handle = fsockopen( $fsockopen_host, $port, $iError, $strError, $r['timeout'] );
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if( $handle === false ){
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static::$debug['fsock'] = 'no handle';
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return false;
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}
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static::stream_timeout($handle,$r['timeout']);
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$strHeaders = $this->ReqHeader($r);
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fwrite($handle, $strHeaders);
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$strResponse = $this->ReadHandle($handle);
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fclose($handle);
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$process = static::processResponse($strResponse);
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$processedHeaders = static::processHeaders($process['headers']);
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$this->body = static::chunkTransferDecode($process['body'],$processedHeaders);
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return $this->ReturnRequest( $url, $r, $processedHeaders );
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}
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/**
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* Return request header string
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*
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*/
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protected function ReqHeader($r){
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$requestPath = $this->url_array['path'] . ( isset($this->url_array['query']) ? '?' . $this->url_array['query'] : '' );
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if ( empty($requestPath) )
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$requestPath .= '/';
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$strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n";
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$strHeaders .= 'Host: ' . $this->url_array['host'] . "\r\n";
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if ( isset($r['user-agent']) )
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$strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n";
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$strHeaders .= "\r\n";
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return $strHeaders;
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}
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/**
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* Read all content from the handle
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*
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*/
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protected function ReadHandle($handle){
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$response = '';
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while( !feof($handle) ){
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$response .= fread($handle, 4096);
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if( strlen($response) > static::$maxlength ){
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break;
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}
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}
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return $response;
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}
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/**
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* Fetch a url using php's curl library
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*
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*/
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protected function curl_request($url, $r){
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$handle = curl_init();
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if( $handle === false ){
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return false;
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}
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/*
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* CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since.
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* a value of 0 will allow an unlimited timeout.
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*/
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$timeout = (int) ceil( $r['timeout'] );
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curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout );
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curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout );
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curl_setopt( $handle, CURLOPT_URL, $url);
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curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true );
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//curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false );
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//curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify );
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//if ( $ssl_verify ) {
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// curl_setopt( $handle, CURLOPT_CAINFO, $r['sslcertificates'] );
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//}
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curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] );
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/*
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* The option doesn't work with safe mode or when open_basedir is set, and there's
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* a bug #17490 with redirected POST requests, so handle redirections outside Curl.
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*/
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curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, false );
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if ( defined( 'CURLOPT_PROTOCOLS' ) ) // PHP 5.2.10 / cURL 7.19.4
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curl_setopt( $handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS );
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curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, $r['method'] );
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curl_setopt( $handle, CURLOPT_HEADERFUNCTION, array( $this, 'curl_headers' ) );
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curl_setopt( $handle, CURLOPT_WRITEFUNCTION, array( $this, 'curl_body' ) );
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curl_setopt( $handle, CURLOPT_HEADER, 0 );
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if( $r['httpversion'] == '1.0' ){
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curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 );
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}else{
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curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
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}
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curl_exec( $handle );
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if( !$r['ignore_errors'] && curl_errno( $handle ) ){
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static::$debug['curl_error'] = curl_error( $handle );
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curl_close( $handle );
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return false;
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}
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curl_close( $handle );
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$processedHeaders = static::processHeaders($this->headers);
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return $this->ReturnRequest( $url, $r, $processedHeaders );
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}
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/**
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* Grab the headers of the cURL request
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*
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* Each header is sent individually to this callback, so we append to the $header property for temporary storage
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*
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* @since 3.2.0
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* @access private
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* @return int
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*/
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private function curl_headers( $handle, $headers ) {
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$this->headers .= $headers;
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return strlen( $headers );
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}
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/**
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* Grab the body of the cURL request
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*
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* The contents of the document are passed in chunks, so we append to the $body property for temporary storage.
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* Returning a length shorter than the length of $data passed in will cause cURL to abort the request with CURLE_WRITE_ERROR
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*
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* @since 3.6.0
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* @access private
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* @return int
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*/
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private function curl_body( $handle, $data ) {
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$data_length = strlen( $data );
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$this->body .= $data;
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$this->bytes_written_total += $data_length;
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// Upon event of this function returning less than strlen( $data ) curl will error with CURLE_WRITE_ERROR.
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return $data_length;
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}
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/**
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* Set the stream timeout
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*
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*/
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public static function stream_timeout($handle,$time){
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if( !function_exists('stream_set_timeout') ){
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return;
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}
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$timeout = (int) floor( $time );
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$utimeout = $timeout == $time ? 0 : 1000000 * $time % 1000000;
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stream_set_timeout( $handle, $timeout, $utimeout );
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}
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/**
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* Return the response info or redirection
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*
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*/
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public function ReturnRequest( $url, $r, $processedHeaders ){
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// If location is found, then assume redirect and redirect to location.
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$redir_location = $this->RedirectLocation($processedHeaders);
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if( $redir_location !== false ){
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if( $redir_location == $url ){
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// redirecting to the same url
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// need cookies
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if( \gp\tool::LoggedIn() ){
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msg('infinite redirection: '.$redir_location);
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}
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return false;
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}
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return $this->Redirect($redir_location,$r);
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}
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if( isset($processedHeaders['headers']['content-encoding']) && $processedHeaders['headers']['content-encoding'] == 'gzip' ){
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$this->Inflate();
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}
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return array('headers' => $processedHeaders['headers'], 'body' => $this->body, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']);
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}
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/**
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* Inflate the gzipped content
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*
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*/
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public function Inflate(){
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$body = @gzdecode($this->body);
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if( $body ){
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$this->body = $body;
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return true;
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}
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$body = @gzinflate(substr($this->body, 10));
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if( $body ){
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$this->body = $body;
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return true;
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}
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trigger_error('RemoteGet::Inflate() failed. Content: '.substr($this->body,0,200));
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return false;
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}
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/**
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* Handle a redirect response
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*
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*/
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public function Redirect($location,$r){
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if( $r['redirection']-- < 0 ){
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trigger_error('Too many redirects');
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return false;
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}
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static::$redirected = $location;
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static::$debug['Redir'] = 1;
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return $this->_get($location, $r);
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}
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/**
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* Get the redirect location
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*
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*/
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public function RedirectLocation($headers){
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if( empty($headers['headers']['location']) ){
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return false;
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}
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|
|
|
//check location for releative value
|
|
$location = $headers['headers']['location'];
|
|
if( is_array($headers['headers']['location']) ){
|
|
do{
|
|
$location = array_pop($headers['headers']['location']);
|
|
$location = trim($location);
|
|
|
|
}while( count($headers['headers']['location']) && empty($location) );
|
|
}
|
|
|
|
$location = trim($location);
|
|
|
|
if( empty($location) ){
|
|
return false;
|
|
}
|
|
|
|
|
|
// //www.example.com
|
|
if( substr($location,0,2) == '//' ){
|
|
$location = $this->url_array['scheme'].':'.$location;
|
|
|
|
// ?page=test
|
|
}elseif( $location[0] == '?' ){
|
|
$location = $this->url_array['scheme'].'://'.rtrim($this->url_array['host'],'/').'/'.ltrim($this->url_array['path'],'/').$location;
|
|
|
|
// /page
|
|
}elseif( $location[0] == '/' ){
|
|
$location = $this->url_array['scheme'].'://'.rtrim($this->url_array['host'],'/').$location;
|
|
|
|
// http://www.example.com
|
|
}elseif( preg_match('#^[a-z]+:#i',$location) ){
|
|
// do nothing
|
|
|
|
// otherwise relative path
|
|
}else{
|
|
$urla = $this->url_array;
|
|
unset($urla['query'], $urla['fragment']);
|
|
|
|
if( empty($urla['path']) || $urla['path'] == '/' ){
|
|
$urla['path'] = $location;
|
|
|
|
}elseif( substr($urla['path'],-1) != '/' ){
|
|
$urla['path'] .= ltrim($location,'/');
|
|
|
|
}else{
|
|
$urla['path'] = rtrim(dirname($urla['path']),'/'). '/' . ltrim($location,'/');
|
|
}
|
|
|
|
$location = $this->unparse_url($urla);
|
|
}
|
|
|
|
return $location;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convert a parsed url array to a url string
|
|
* @param array $parsed_url
|
|
* @return string
|
|
*
|
|
*/
|
|
public function unparse_url($parsed_url) {
|
|
|
|
$scheme = isset($parsed_url['scheme']) ? $parsed_url['scheme'] . '://' : '';
|
|
$host = isset($parsed_url['host']) ? $parsed_url['host'] : '';
|
|
$port = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
|
|
$user = isset($parsed_url['user']) ? $parsed_url['user'] : '';
|
|
$pass = isset($parsed_url['pass']) ? ':' . $parsed_url['pass'] : '';
|
|
$pass = ($user || $pass) ? "$pass@" : '';
|
|
$path = isset($parsed_url['path']) ? '/'.ltrim($parsed_url['path'],'/') : '';
|
|
$query = isset($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
|
|
$fragment = isset($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
|
|
|
|
return "$scheme$user$pass$host$port$path$query$fragment";
|
|
}
|
|
|
|
|
|
/**
|
|
* Decodes chunk transfer-encoding, based off the HTTP 1.1 specification.
|
|
*
|
|
* Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support
|
|
* returning footer headers. Shouldn't be too difficult to support it though.
|
|
*
|
|
* @todo Add support for footer chunked headers.
|
|
* @access public
|
|
* @since 1.7
|
|
* @static
|
|
*
|
|
* @param string $body Body content
|
|
* @return string Chunked decoded body on success or raw body on failure.
|
|
*/
|
|
public static function chunkTransferDecode($body,$headers){
|
|
|
|
if( !static::IsChunked($body,$headers) ){
|
|
return $body;
|
|
}
|
|
|
|
$parsed_body = '';
|
|
|
|
// We'll be altering $body, so need a backup in case of error.
|
|
$body_original = $body;
|
|
|
|
while ( true ) {
|
|
$has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match );
|
|
if ( ! $has_chunk || empty( $match[1] ) )
|
|
return $body_original;
|
|
|
|
$length = (int)hexdec( $match[1] );
|
|
$chunk_length = strlen( $match[0] );
|
|
|
|
// Parse out the chunk of data.
|
|
$parsed_body .= substr( $body, $chunk_length, $length );
|
|
|
|
// Remove the chunk from the raw data.
|
|
$body = substr( $body, $length + $chunk_length );
|
|
|
|
// End of the document.
|
|
if ( '0' === trim( $body ) )
|
|
return $parsed_body;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Return true if the response body is chunked
|
|
*
|
|
*/
|
|
public static function IsChunked($body, $headers){
|
|
|
|
$body = trim($body);
|
|
|
|
if( empty($body) ){
|
|
return false;
|
|
}
|
|
if( !isset( $headers['headers']['transfer-encoding'] ) || 'chunked' != $headers['headers']['transfer-encoding'] ){
|
|
return false;
|
|
}
|
|
|
|
|
|
// The body is not chunked encoded or is malformed.
|
|
if( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i',$body) ){
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Gets stream headers, return false otherwise
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since 1.7
|
|
*
|
|
* @param resource $handle stream handle
|
|
* @return array|false Array with unprocessed string headers.
|
|
*/
|
|
public static function StreamHeaders($handle){
|
|
|
|
$meta = stream_get_meta_data($handle);
|
|
if( !isset($meta['wrapper_data']) ){
|
|
return $http_response_header; //$http_response_header is a PHP reserved variable which is set in the current-scope when using the HTTP Wrapper
|
|
}
|
|
|
|
$theHeaders = $meta['wrapper_data'];
|
|
if( isset($meta['wrapper_data']['headers']) ){
|
|
$theHeaders = $meta['wrapper_data']['headers'];
|
|
}
|
|
|
|
return $theHeaders;
|
|
}
|
|
|
|
|
|
/**
|
|
* Parses the responses and splits the parts into headers and body.
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since 1.7
|
|
*
|
|
* @param string $strResponse The full response string
|
|
* @return array Array with 'headers' and 'body' keys.
|
|
*/
|
|
public static function processResponse($strResponse) {
|
|
list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2);
|
|
return array('headers' => $theHeaders, 'body' => $theBody);
|
|
}
|
|
|
|
/**
|
|
* Transform header string into an array.
|
|
*
|
|
* If an array is given then it is assumed to be raw header data with numeric keys with the
|
|
* headers as the values. No headers must be passed that were already processed.
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since 1.7
|
|
*
|
|
* @param string|array $headers
|
|
* @return array Processed string headers. If duplicate headers are encountered,
|
|
* Then a numbered array is returned as the value of that header-key.
|
|
*/
|
|
public static function processHeaders($headers) {
|
|
|
|
$headers = static::HeadersArray($headers);
|
|
$response = array('code' => 0, 'message' => '');
|
|
$cookies = array();
|
|
$newheaders = array();
|
|
|
|
foreach( $headers as $tempheader ){
|
|
|
|
if( false === strpos($tempheader, ':') ){
|
|
$stack = explode(' ', $tempheader, 3);
|
|
$stack[] = '';
|
|
list( , $response['code'], $response['message']) = $stack;
|
|
continue;
|
|
}
|
|
|
|
list($key, $value) = explode(':', $tempheader, 2);
|
|
$key = strtolower( $key );
|
|
$value = trim( $value );
|
|
|
|
if( isset( $newheaders[$key] ) ){
|
|
if( !is_array( $newheaders[$key] ) ){
|
|
$newheaders[$key] = array( $newheaders[$key] );
|
|
}
|
|
$newheaders[$key][] = $value;
|
|
}else{
|
|
$newheaders[$key] = $value;
|
|
}
|
|
}
|
|
|
|
|
|
static::$debug['Headers'] = count($newheaders);
|
|
|
|
return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies);
|
|
}
|
|
|
|
|
|
/**
|
|
* Split header header string into array if needed
|
|
*
|
|
*/
|
|
protected static function HeadersArray($headers){
|
|
// split headers, one per array element
|
|
if ( is_string($headers) ) {
|
|
// tolerate line terminator: CRLF = LF (RFC 2616 19.3)
|
|
$headers = str_replace("\r\n", "\n", $headers);
|
|
// unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2)
|
|
$headers = preg_replace('/\n[ \t]/', ' ', $headers);
|
|
// create the headers array
|
|
$headers = explode("\n", $headers);
|
|
}
|
|
$headers = (array)$headers;
|
|
$headers = array_filter($headers);
|
|
|
|
return $headers;
|
|
}
|
|
|
|
|
|
/**
|
|
* Output debug info about the most recent request
|
|
*
|
|
*/
|
|
public static function Debug($lang_key, $debug = array()){
|
|
|
|
$debug = array_merge(static::$debug,$debug);
|
|
|
|
return \gp\tool::Debug($lang_key, $debug);
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
class gpRemoteGet extends \gp\tool\RemoteGet{}
|
|
}
|