class_HTTPRetriever.php
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上传日期:2022-07-31
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WEB源码(ASP,PHP,...)
开发平台:
PHP
- <?php
- /* HTTP Retriever
- * Version v1.1.10
- * Copyright 2004-2007, Steve Blinch
- * http://code.blitzaffe.com
- * ============================================================================
- *
- * DESCRIPTION
- *
- * Provides a pure-PHP implementation of an HTTP v1.1 client, including support
- * for chunked transfer encoding and user agent spoofing. Both GET and POST
- * requests are supported.
- *
- * This can be used in place of something like CURL or WGET for HTTP requests.
- * Native SSL (HTTPS) requests are also supported if the OpenSSL extension is
- * installed under PHP v4.3.0 or greater.
- *
- * If native SSL support is not available, the class will also check for the
- * CURL extension; if it's installed, it will transparently be used for SSL
- * (HTTPS) requests.
- *
- * If neither native SSL support nor the CURL extension are available, and
- * libcurlemu (a CURL emulation library available from our web site) is found,
- * the class will also check for the CURL console binary (usually in
- * /usr/bin/curl); if it's installed, it will transparently be used for SSL
- * requests.
- *
- * In short, if it's possible to make an HTTP/HTTPS request from your server,
- * this class can most likely do it.
- *
- *
- * HISTORY
- *
- * 1.1.10 (13-Feb-2006)
- * - Fixed bug wherein libcurlemu may not be correctly included when
- * needed.
- * - Fixed bug wherein stream read timeouts may not be recognized
- * - Adjusted timeout handling code to better handle timeout conditions
- * - Added intelligent caching support
- * - Caching is now better-handled for high-volume requests
- * - Added postprocessing callback support
- * - Improved redirect support
- * - Fixed bug in which POST requests couldn't use GET-style query strings
- * - Added header cleanup between requests
- * - Added partial proxy support via $http->curl_proxy (only useable when
- * $http->force_curl is TRUE; internal support not yet implemented)
- *
- *
- * 1.1.9 (11-Oct-2006)
- * - Added set_transfer_display() and default_transfer_callback()
- * methods for transfer progress tracking
- * - Suppressed possible "fatal protocol error" when remote SSL server
- * closes the connection early
- * - Added get_content_type() method
- * - make_query_string() now handles arrays
- *
- * 1.1.8 (19-Jun-2006)
- * - Added set_progress_display() and default_progress_callback()
- * methods for debug output
- * - Added support for relative URLs in HTTP redirects
- * - Added cookie support (sending and receiving)
- * - Numerous bug fixes
- *
- * 1.1.7 (18-Apr-2006)
- * - Added support for automatically following HTTP redirects
- * - Added ::get_error() method to get any available error message (be
- * it an HTTP result error or an internal/connection error)
- * - Added ::cache_hit variable to determine whether the page was cached
- *
- * 1.1.6 (04-Mar-2006)
- * - Added stream_timeout class variable.
- * - Added progress_callback class variable.
- * - Added support for braindead servers that ignore Connection: close
- *
- *
- * EXAMPLE
- *
- * // HTTPRetriever usage example
- * require_once("class_HTTPRetriever.php");
- * $http = &new HTTPRetriever();
- *
- *
- * // Example GET request:
- * // ----------------------------------------------------------------------------
- * $keyword = "blitzaffe code"; // search Google for this keyword
- * if (!$http->get("http://www.google.com/search?hl=en&q=%22".urlencode($keyword)."%22&btnG=Search&meta=")) {
- * echo "HTTP request error: #{$http->result_code}: {$http->result_text}";
- * return false;
- * }
- * echo "HTTP response headers:<br><pre>";
- * var_dump($http->response_headers);
- * echo "</pre><br>";
- *
- * echo "Page content:<br><pre>";
- * echo $http->response;
- * echo "</pre>";
- * // ----------------------------------------------------------------------------
- *
- *
- * // Example POST request:
- * // ----------------------------------------------------------------------------
- * $keyword = "blitzaffe code"; // search Google for this keyword
- * $values = array(
- * "hl"=>"en",
- * "q"=>"%22".urlencode($keyword)."%22",
- * "btnG"=>"Search",
- * "meta"=>""
- * );
- * // Note: This example is just to demonstrate the POST equivalent of the GET
- * // example above; running this script will return a 501 Not Implemented, as
- * // Google does not support POST requests.
- * if (!$http->post("http://www.google.com/search",$http->make_query_string($values))) {
- * echo "HTTP request error: #{$http->result_code}: {$http->result_text}";
- * return false;
- * }
- * echo "HTTP response headers:<br><pre>";
- * var_dump($http->response_headers);
- * echo "</pre><br>";
- *
- * echo "Page content:<br><pre>";
- * echo $http->response;
- * echo "</pre>";
- * // ----------------------------------------------------------------------------
- *
- *
- * LICENSE
- *
- * This script 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 script 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 script; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- // define user agent ID's
- define("UA_EXPLORER",0);
- define("UA_MOZILLA",1);
- define("UA_FIREFOX",2);
- define("UA_OPERA",3);
- // define progress message severity levels
- define('HRP_DEBUG',0);
- define('HRP_INFO',1);
- define('HRP_ERROR',2);
- if (!defined("CURL_PATH")) define("CURL_PATH","/usr/bin/curl");
- // if the CURL extension is not loaded, but the CURL Emulation Library is found, try
- // to load it
- if (!extension_loaded("curl") && !defined('HTTPR_NO_REDECLARE_CURL') ) {
- foreach (array(dirname(__FILE__)."/",dirname(__FILE__)."/libcurlemu/") as $k=>$libcurlemupath) {
- $libcurlemuinc = $libcurlemupath.'libcurlemu.inc.php';
- if (is_readable($libcurlemuinc)) require_once($libcurlemuinc);
- }
- }
- class HTTPRetriever {
- // Constructor
- function HTTPRetriever() {
- // default HTTP headers to send with all requests
- $this->headers = array(
- "Referer"=>"",
- "User-Agent"=>"HTTPRetriever/1.0",
- "Connection"=>"close"
- );
- // HTTP version (has no effect if using CURL)
- $this->version = "1.1";
- // Normally, CURL is only used for HTTPS requests; setting this to
- // TRUE will force CURL for HTTP requests as well. Not recommended.
- $this->force_curl = false;
- // If you don't want to use CURL at all, set this to TRUE.
- $this->disable_curl = false;
- // If HTTPS request return an error message about SSL certificates in
- // $this->error and you don't care about security, set this to TRUE
- $this->insecure_ssl = false;
- // Set the maximum time to wait for a connection
- $this->connect_timeout = 15;
- // Set the maximum time to allow a transfer to run, or 0 to disable.
- $this->max_time = 0;
- // Set the maximum time for a socket read/write operation, or 0 to disable.
- $this->stream_timeout = 0;
- // If you're making an HTTPS request to a host whose SSL certificate
- // doesn't match its domain name, AND YOU FULLY UNDERSTAND THE
- // SECURITY IMPLICATIONS OF IGNORING THIS PROBLEM, set this to TRUE.
- $this->ignore_ssl_hostname = false;
- // If TRUE, the get() and post() methods will close the connection
- // and return immediately after receiving the HTTP result code
- $this->result_close = false;
- // If set to a positive integer value, retrieved pages will be cached
- // for this number of seconds. Any subsequent calls within the cache
- // period will return the cached page, without contacting the remote
- // server.
- $this->caching = false;
- // If TRUE and $this->caching is not false, retrieved pages/files will be
- // cached only if they appear to be static.
- $this->caching_intelligent = false;
- // If TRUE, cached files will be stored in subdirectories corresponding
- // to the first 2 letters of the hash filename
- $this->caching_highvolume = false;
- // If $this->caching is enabled, this specifies the folder under which
- // cached pages are saved.
- $this->cache_path = '/tmp/';
- // Set these to perform basic HTTP authentication
- $this->auth_username = '';
- $this->auth_password = '';
- // Optionally set this to a valid callback method to have HTTPRetriever
- // provide page preprocessing capabilities to your script. If set, this
- // method should accept two arguments: an object representing an instance
- // of HTTPRetriever, and a string containing the page contents
- $this->page_preprocessor = null;
- // Optionally set this to a valid callback method to have HTTPRetriever
- // provide progress messages. Your callback must accept 2 parameters:
- // an integer representing the severity (0=debug, 1=information, 2=error),
- // and a string representing the progress message
- $this->progress_callback = null;
- // Optionally set this to a valid callback method to have HTTPRetriever
- // provide bytes-transferred messages. Your callbcak must accept 2
- // parameters: an integer representing the number of bytes transferred,
- // and an integer representing the total number of bytes expected (or
- // -1 if unknown).
- $this->transfer_callback = null;
- // Set this to TRUE if you HTTPRetriever to transparently follow HTTP
- // redirects (code 301, 302, 303, and 307). Optionally set this to a
- // numeric value to limit the maximum number of redirects to the specified
- // value. (Redirection loops are detected automatically.)
- // Note that non-GET/HEAD requests will NOT be redirected except on code
- // 303, as per HTTP standards.
- $this->follow_redirects = false;
- }
- // Send an HTTP GET request to $url; if $ipaddress is specified, the
- // connection will be made to the selected IP instead of resolving the
- // hostname in $url.
- //
- // If $cookies is set, it should be an array in one of two formats.
- //
- // Either: $cookies[ 'cookiename' ] = array (
- // '/path/'=>array(
- // 'expires'=>time(),
- // 'domain'=>'yourdomain.com',
- // 'value'=>'cookievalue'
- // )
- // );
- //
- // Or, a more simplified format:
- // $cookies[ 'cookiename' ] = 'value';
- //
- // The former format will automatically check to make sure that the path, domain,
- // and expiration values match the HTTP request, and will only send the cookie if
- // they do match. The latter will force the cookie to be set for the HTTP request
- // unconditionally.
- //
- function get($url,$ipaddress = false,$cookies = false) {
- $this->method = "GET";
- $this->post_data = "";
- $this->connect_ip = $ipaddress;
- return $this->_execute_request($url,$cookies);
- }
- // Send an HTTP POST request to $url containing the POST data $data. See ::get()
- // for a description of the remaining arguments.
- function post($url,$data="",$ipaddress = false,$cookies = false) {
- $this->method = "POST";
- $this->post_data = $data;
- $this->connect_ip = $ipaddress;
- return $this->_execute_request($url,$cookies);
- }
- // Send an HTTP HEAD request to $url. See ::get() for a description of the arguments.
- function head($url,$ipaddress = false,$cookies = false) {
- $this->method = "HEAD";
- $this->post_data = "";
- $this->connect_ip = $ipaddress;
- return $this->_execute_request($url,$cookies);
- }
- // send an alternate (non-GET/POST) HTTP request to $url
- function custom($method,$url,$data="",$ipaddress = false,$cookies = false) {
- $this->method = $method;
- $this->post_data = $data;
- $this->connect_ip = $ipaddress;
- return $this->_execute_request($url,$cookies);
- }
- function array_to_query($arrayname,$arraycontents) {
- $output = "";
- foreach ($arraycontents as $key=>$value) {
- if (is_array($value)) {
- $output .= $this->array_to_query(sprintf('%s[%s]',$arrayname,urlencode($key)),$value);
- } else {
- $output .= sprintf('%s[%s]=%s&',$arrayname,urlencode($key),urlencode($value));
- }
- }
- return $output;
- }
- // builds a query string from the associative array array $data;
- // returns a string that can be passed to $this->post()
- function make_query_string($data) {
- $output = "";
- if (is_array($data)) {
- foreach ($data as $name=>$value) {
- if (is_array($value)) {
- $output .= $this->array_to_query(urlencode($name),$value);
- } elseif (is_scalar($value)) {
- $output .= urlencode($name)."=".urlencode($value)."&";
- } else {
- $output .= urlencode($name)."=".urlencode(serialize($value)).'&';
- }
- }
- }
- return substr($output,0,strlen($output)-1);
- }
- // this is pretty limited... but really, if you're going to spoof you UA, you'll probably
- // want to use a Windows OS for the spoof anyway
- //
- // if you want to set the user agent to a custom string, just assign your string to
- // $this->headers["User-Agent"] directly
- function set_user_agent($agenttype,$agentversion,$windowsversion) {
- $useragents = array(
- "Mozilla/4.0 (compatible; MSIE %agent%; Windows NT %os%)", // IE
- "Mozilla/5.0 (Windows; U; Windows NT %os%; en-US; rv:%agent%) Gecko/20040514", // Moz
- "Mozilla/5.0 (Windows; U; Windows NT %os%; en-US; rv:1.7) Gecko/20040803 Firefox/%agent%", // FFox
- "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT %os%) Opera %agent% [en]", // Opera
- );
- $agent = $useragents[$agenttype];
- $this->headers["User-Agent"] = str_replace(array("%agent%","%os%"),array($agentversion,$windowsversion),$agent);
- }
- // this isn't presently used as it's now handled inline by the request parser
- function remove_chunkiness() {
- $remaining = $this->response;
- $this->response = "";
- while ($remaining) {
- $hexlen = strpos($remaining,"r");
- $chunksize = substr($remaining,0,$hexlen);
- $argstart = strpos($chunksize,';');
- if ($argstart!==false) $chunksize = substr($chunksize,0,$argstart);
- $chunksize = (int) @hexdec($chunksize);
- $this->response .= substr($remaining,$hexlen+2,$chunksize);
- $remaining = substr($remaining,$hexlen+2+$chunksize+2);
- if (!$chunksize) {
- // either we're done, or something's borked... exit
- $this->response .= $remaining;
- return;
- }
- }
- }
- // (internal) store a page in the cache
- function _cache_store($token,$url) {
- if ($this->caching_intelligent) {
- $urlinfo = parse_url($url);
- if ($this->method=='POST') {
- $this->progress(HRP_DEBUG,"POST request; not caching");
- return;
- } else if (strlen($urlinfo['query'])) {
- $this->progress(HRP_DEBUG,"Request used query string; not caching");
- return;
- } else {
- $this->progress(HRP_DEBUG,"Request appears to be static and cacheable");
- }
- }
- $values = array(
- "stats"=>$this->stats,
- "result_code"=>$this->result_code,
- "result_text"=>$this->result_text,
- "version"=>$this->version,
- "response"=>$this->response,
- "response_headers"=>$this->response_headers,
- "response_cookies"=>$this->response_cookies,
- "raw_response"=>$this->raw_response,
- );
- $values = serialize($values);
- $cache_dir = $this->cache_path;
- if (substr($cache_dir,-1)!='/') $cache_dir .= '/';
- if ($this->caching_highvolume) {
- $cache_dir .= substr($token,0,2) . '/';
- if (!is_dir($cache_dir)) @mkdir($cache_dir);
- }
- $filename = $cache_dir.$token.'.tmp';
- $fp = @fopen($filename,"w");
- if (!$fp) {
- $this->progress(HRP_DEBUG,"Unable to create cache file");
- return false;
- }
- fwrite($fp,$values);
- fclose($fp);
- $this->progress(HRP_DEBUG,"HTTP response stored to cache");
- }
- // (internal) fetch a page from the cache
- function _cache_fetch($token) {
- $this->cache_hit = false;
- $this->progress(HRP_DEBUG,"Checking for cached page value");
- $cache_dir = $this->cache_path;
- if (substr($cache_dir,-1)!='/') $cache_dir .= '/';
- if ($this->caching_highvolume) $cache_dir .= substr($token,0,2) . '/';
- $filename = $cache_dir.$token.'.tmp';
- if (!file_exists($filename)) {
- $this->progress(HRP_DEBUG,"Page not available in cache");
- return false;
- }
- if (time()-filemtime($filename)>$this->caching) {
- $this->progress(HRP_DEBUG,"Page in cache is expired");
- @unlink($filename);
- return false;
- }
- if ($values = file_get_contents($filename)) {
- $values = unserialize($values);
- if (!$values) {
- $this->progress(HRP_DEBUG,"Invalid cache contents");
- return false;
- }
- $this->stats = $values["stats"];
- $this->result_code = $values["result_code"];
- $this->result_text = $values["result_text"];
- $this->version = $values["version"];
- $this->response = $values["response"];
- $this->response_headers = $values["response_headers"];
- $this->response_cookies = $values["response_cookies"];
- $this->raw_response = $values["raw_response"];
- $this->progress(HRP_DEBUG,"Page loaded from cache");
- $this->cache_hit = true;
- return true;
- } else {
- $this->progress(HRP_DEBUG,"Error reading cache file");
- return false;
- }
- }
- function parent_path($path) {
- if (substr($path,0,1)=='/') $path = substr($path,1);
- if (substr($path,-1)=='/') $path = substr($path,0,strlen($path)-1);
- $path = explode('/',$path);
- array_pop($path);
- return count($path) ? ('/' . implode('/',$path)) : '';
- }
- // $cookies should be an array in one of two formats.
- //
- // Either: $cookies[ 'cookiename' ] = array (
- // '/path/'=>array(
- // 'expires'=>time(),
- // 'domain'=>'yourdomain.com',
- // 'value'=>'cookievalue'
- // )
- // );
- //
- // Or, a more simplified format:
- // $cookies[ 'cookiename' ] = 'value';
- //
- // The former format will automatically check to make sure that the path, domain,
- // and expiration values match the HTTP request, and will only send the cookie if
- // they do match. The latter will force the cookie to be set for the HTTP request
- // unconditionally.
- //
- function response_to_request_cookies($cookies,$urlinfo) {
- // check for simplified cookie format (name=value)
- $cookiekeys = array_keys($cookies);
- if (!count($cookiekeys)) return;
- $testkey = array_pop($cookiekeys);
- if (!is_array($cookies[ $testkey ])) {
- foreach ($cookies as $k=>$v) $this->request_cookies[$k] = $v;
- return;
- }
- // must not be simplified format, so parse as complex format:
- foreach ($cookies as $name=>$paths) {
- foreach ($paths as $path=>$values) {
- // make sure the cookie isn't expired
- if ( isset($values['expires']) && ($values['expires']<time()) ) continue;
- $cookiehost = $values['domain'];
- $requesthost = $urlinfo['host'];
- // make sure the cookie is valid for this host
- $domain_match = (
- ($requesthost==$cookiehost) ||
- (substr($requesthost,-(strlen($cookiehost)+1))=='.'.$cookiehost)
- );
- // make sure the cookie is valid for this path
- $cookiepath = $path; if (substr($cookiepath,-1)!='/') $cookiepath .= '/';
- $requestpath = $urlinfo['path']; if (substr($requestpath,-1)!='/') $requestpath .= '/';
- if (substr($requestpath,0,strlen($cookiepath))!=$cookiepath) continue;
- $this->request_cookies[$name] = $values['value'];
- }
- }
- }
- // Execute the request for a particular URL, and transparently follow
- // HTTP redirects if enabled. If $cookies is specified, it is assumed
- // to be an array received from $this->response_cookies and will be
- // processed to determine which cookies are valid for this host/URL.
- function _execute_request($url,$cookies = false) {
- // valid codes for which we transparently follow a redirect
- $redirect_codes = array(301,302,303,307);
- // valid methods for which we transparently follow a redirect
- $redirect_methods = array('GET','HEAD');
- $request_result = false;
- $this->followed_redirect = false;
- $this->response_cookies = array();
- $this->cookie_headers = '';
- $previous_redirects = array();
- do {
- // send the request
- $request_result = $this->_send_request($url,$cookies);
- $lasturl = $url;
- $url = false;
- // see if a redirect code was received
- if ($this->follow_redirects && in_array($this->result_code,$redirect_codes)) {
- // only redirect on a code 303 or if the method was GET/HEAD
- if ( ($this->result_code==303) || in_array($this->method,$redirect_methods) ) {
- // parse the information from the OLD URL so that we can handle
- // relative links
- $oldurlinfo = parse_url($lasturl);
- $url = $this->response_headers['Location'];
- // parse the information in the new URL, and fill in any blanks
- // using values from the old URL
- $urlinfo = parse_url($url);
- foreach ($oldurlinfo as $k=>$v) {
- if (!$urlinfo[$k]) $urlinfo[$k] = $v;
- }
- // create an absolute path
- if (substr($urlinfo['path'],0,1)!='/') {
- $baseurl = $oldurlinfo['path'];
- if (substr($baseurl,-1)!='/') $baseurl = $this->parent_path($url) . '/';
- $urlinfo['path'] = $baseurl . $urlinfo['path'];
- }
- // rebuild the URL
- $url = $this->rebuild_url($urlinfo);
- $this->method = "GET";
- $this->post_data = "";
- $this->progress(HRP_INFO,'Redirected to '.$url);
- }
- }
- if ( $url && strlen($url) ) {
- if (isset($previous_redirects[$url])) {
- $this->error = "Infinite redirection loop";
- $request_result = false;
- break;
- }
- if ( is_numeric($this->follow_redirects) && (count($previous_redirects)>$this->follow_redirects) ) {
- $this->error = "Exceeded redirection limit";
- $request_result = false;
- break;
- }
- $previous_redirects[$url] = true;
- }
- } while ($url && strlen($url));
- // clear headers that shouldn't persist across multiple requests
- $per_request_headers = array('Host','Content-Length');
- foreach ($per_request_headers as $k=>$v) unset($this->headers[$v]);
- if (count($previous_redirects)>1) $this->followed_redirect = array_keys($previous_redirects);
- return $request_result;
- }
- // private - sends an HTTP request to $url
- function _send_request($url,$cookies = false) {
- $this->progress(HRP_INFO,"Initiating {$this->method} request for $url");
- if ($this->caching) {
- $cachetoken = md5($url.'|'.$this->post_data);
- if ($this->_cache_fetch($cachetoken)) return true;
- }
- $time_request_start = $this->getmicrotime();
- $urldata = parse_url($url);
- $this->urldata = &$urldata;
- $http_host = $urldata['host'] . (isset($urldata['port']) ? ':'.$urldata['port'] : '');
- if (!isset($urldata["port"]) || !$urldata["port"]) $urldata["port"] = ($urldata["scheme"]=="https") ? 443 : 80;
- if (!isset($urldata["path"]) || !$urldata["path"]) $urldata["path"] = '/';
- if (!empty($urldata['user'])) $this->auth_username = $urldata['user'];
- if (!empty($urldata['pass'])) $this->auth_password = $urldata['pass'];
- //echo "Sending HTTP/{$this->version} {$this->method} request for ".$urldata["host"].":".$urldata["port"]." page ".$urldata["path"]."<br>";
- if ($this->version>"1.0") $this->headers["Host"] = $http_host;
- if ($this->method=="POST") {
- $this->headers["Content-Length"] = strlen($this->post_data);
- if (!isset($this->headers["Content-Type"])) $this->headers["Content-Type"] = "application/x-www-form-urlencoded";
- }
- if ( !empty($this->auth_username) || !empty($this->auth_password) ) {
- $this->headers['Authorization'] = 'Basic '.base64_encode($this->auth_username.':'.$this->auth_password);
- } else {
- unset($this->headers['Authorization']);
- }
- if (is_array($cookies)) {
- $this->response_to_request_cookies($cookies,$urldata);
- }
- if (!empty($urldata["query"])) $urldata["path"] .= "?".$urldata["query"];
- $request = $this->method." ".$urldata["path"]." HTTP/".$this->version."rn";
- $request .= $this->build_headers();
- $request .= $this->post_data;
- $this->response = "";
- // clear headers that shouldn't persist across multiple requests
- // (we can do this here as we've already built the request, including headers, above)
- $per_request_headers = array('Host','Content-Length');
- foreach ($per_request_headers as $k=>$v) unset($this->headers[$v]);
- // Native SSL support requires the OpenSSL extension, and was introduced in PHP 4.3.0
- $php_ssl_support = extension_loaded("openssl") && version_compare(phpversion(),"4.3.0")>=0;
- // if this is a plain HTTP request, or if it's an HTTPS request and OpenSSL support is available,
- // natively perform the HTTP request
- if ( ( ($urldata["scheme"]=="http") || ($php_ssl_support && ($urldata["scheme"]=="https")) ) && (!$this->force_curl) ) {
- $curl_mode = false;
- $hostname = $this->connect_ip ? $this->connect_ip : $urldata['host'];
- if ($urldata["scheme"]=="https") $hostname = 'ssl://'.$hostname;
- $time_connect_start = $this->getmicrotime();
- $this->progress(HRP_INFO,'Opening socket connection to '.$hostname.' port '.$urldata['port']);
- $this->expected_bytes = -1;
- $this->received_bytes = 0;
- $fp = @fsockopen ($hostname,$urldata["port"],$errno,$errstr,$this->connect_timeout);
- $time_connected = $this->getmicrotime();
- $connect_time = $time_connected - $time_connect_start;
- if ($fp) {
- if ($this->stream_timeout) stream_set_timeout($fp,$this->stream_timeout);
- $this->progress(HRP_INFO,"Connected; sending request");
- $this->progress(HRP_DEBUG,$request);
- fputs ($fp, $request);
- $this->raw_request = $request;
- if ($this->stream_timeout) {
- $meta = socket_get_status($fp);
- if ($meta['timed_out']) {
- $this->error = "Exceeded socket write timeout of ".$this->stream_timeout." seconds";
- $this->progress(HRP_ERROR,$this->error);
- return false;
- }
- }
- $this->progress(HRP_INFO,"Request sent; awaiting reply");
- $headers_received = false;
- $data_length = false;
- $chunked = false;
- $iterations = 0;
- while (!feof($fp)) {
- if ($data_length>0) {
- $line = fread($fp,$data_length);
- $this->progress(HRP_DEBUG,"[DL] Got a line: [{$line}] " . gettype($line));
- if ($line!==false) $data_length -= strlen($line);
- } else {
- $line = @fgets($fp,10240);
- $this->progress(HRP_DEBUG,"[NDL] Got a line: [{$line}] " . gettype($line));
- if ( ($chunked) && ($line!==false) ) {
- $line = trim($line);
- if (!strlen($line)) continue;
- list($data_length,) = explode(';',$line,2);
- $data_length = (int) hexdec(trim($data_length));
- if ($data_length==0) {
- $this->progress(HRP_DEBUG,"Done");
- // end of chunked data
- break;
- }
- $this->progress(HRP_DEBUG,"Chunk length $data_length (0x$line)");
- continue;
- }
- }
- if ($line===false) {
- $meta = socket_get_status($fp);
- if ($meta['timed_out']) {
- if ($this->stream_timeout) {
- $this->error = "Exceeded socket read timeout of ".$this->stream_timeout." seconds";
- } else {
- $this->error = "Exceeded default socket read timeout";
- }
- $this->progress(HRP_ERROR,$this->error);
- return false;
- } else {
- $this->progress(HRP_ERROR,'No data but not timed out');
- }
- continue;
- }
- // check time limits if requested
- if ($this->max_time>0) {
- if ($this->getmicrotime() - $time_request_start > $this->max_time) {
- $this->error = "Exceeded maximum transfer time of ".$this->max_time." seconds";
- $this->progress(HRP_ERROR,$this->error);
- return false;
- break;
- }
- }
- $this->response .= $line;
- $iterations++;
- if ($headers_received) {
- if ($time_connected>0) {
- $time_firstdata = $this->getmicrotime();
- $process_time = $time_firstdata - $time_connected;
- $time_connected = 0;
- }
- $this->received_bytes += strlen($line);
- if ($iterations % 20 == 0) {
- $this->update_transfer_counters();
- }
- }
- // some dumbass webservers don't respect Connection: close and just
- // leave the connection open, so we have to be diligent about
- // calculating the content length so we can disconnect at the end of
- // the response
- if ( (!$headers_received) && (trim($line)=="") ) {
- $headers_received = true;
- $this->progress(HRP_DEBUG,"Got headers: {$this->response}");
- if (preg_match('/^Content-Length: ([0-9]+)/im',$this->response,$matches)) {
- $data_length = (int) $matches[1];
- $this->progress(HRP_DEBUG,"Content length is $data_length");
- $this->expected_bytes = $data_length;
- $this->update_transfer_counters();
- } else {
- $this->progress(HRP_DEBUG,"No data length specified");
- }
- if (preg_match("/^Transfer-Encoding: chunked/im",$this->response,$matches)) {
- $chunked = true;
- $this->progress(HRP_DEBUG,"Chunked transfer encoding requested");
- } else {
- $this->progress(HRP_DEBUG,"CTE not requested");
- }
- if (preg_match_all("/^Set-Cookie: ((.*?)=(.*?)(?:;s*(.*))?)$/im",$this->response,$cookielist,PREG_SET_ORDER)) {
- foreach ($cookielist as $k=>$cookie) $this->cookie_headers .= $cookie[0]."n";
- // get the path for which cookies will be valid if no path is specified
- $cookiepath = preg_replace('//{2,}/','',$urldata['path']);
- if (substr($cookiepath,-1)!='/') {
- $cookiepath = explode('/',$cookiepath);
- array_pop($cookiepath);
- $cookiepath = implode('/',$cookiepath) . '/';
- }
- // process each cookie
- foreach ($cookielist as $k=>$cookiedata) {
- list(,$rawcookie,$name,$value,$attributedata) = $cookiedata;
- $attributedata = explode(';',trim($attributedata));
- $attributes = array();
- $cookie = array(
- 'value'=>$value,
- 'raw'=>trim($rawcookie),
- );
- foreach ($attributedata as $k=>$attribute) {
- list($attrname,$attrvalue) = explode('=',trim($attribute));
- $cookie[$attrname] = $attrvalue;
- }
- if (!isset($cookie['domain']) || !$cookie['domain']) $cookie['domain'] = $urldata['host'];
- if (!isset($cookie['path']) || !$cookie['path']) $cookie['path'] = $cookiepath;
- if (isset($cookie['expires']) && $cookie['expires']) $cookie['expires'] = strtotime($cookie['expires']);
- if (!$this->validate_response_cookie($cookie,$urldata['host'])) continue;
- // do not store expired cookies; if one exists, unset it
- if ( isset($cookie['expires']) && ($cookie['expires']<time()) ) {
- unset($this->response_cookies[ $name ][ $cookie['path'] ]);
- continue;
- }
- $this->response_cookies[ $name ][ $cookie['path'] ] = $cookie;
- }
- }
- }
- if ($this->result_close) {
- if (preg_match_all("/HTTP/([0-9.]+) ([0-9]+) (.*?)[rn]/",$this->response,$matches)) {
- $resultcodes = $matches[2];
- foreach ($resultcodes as $k=>$code) {
- if ($code!=100) {
- $this->progress(HRP_INFO,'HTTP result code received; closing connection');
- $this->result_code = $code;
- $this->result_text = $matches[3][$k];
- fclose($fp);
- return ($this->result_code==200);
- }
- }
- }
- }
- }
- if (feof($fp)) $this->progress(HRP_DEBUG,'EOF on socket');
- @fclose ($fp);
- $this->update_transfer_counters();
- if (is_array($this->response_cookies)) {
- // make sure paths are sorted in the order in which they should be applied
- // when setting response cookies
- foreach ($this->response_cookies as $name=>$paths) {
- ksort($this->response_cookies[$name]);
- }
- }
- $this->progress(HRP_INFO,'Request complete');
- } else {
- $this->error = strtoupper($urldata["scheme"])." connection to ".$hostname." port ".$urldata["port"]." failed";
- $this->progress(HRP_ERROR,$this->error);
- return false;
- }
- // perform an HTTP/HTTPS request using CURL
- } elseif ( !$this->disable_curl && ( ($urldata["scheme"]=="https") || ($this->force_curl) ) ) {
- $this->progress(HRP_INFO,'Passing HTTP request for $url to CURL');
- $curl_mode = true;
- if (!$this->_curl_request($url)) return false;
- // unknown protocol
- } else {
- $this->error = "Unsupported protocol: ".$urldata["scheme"];
- $this->progress(HRP_ERROR,$this->error);
- return false;
- }
- $this->raw_response = $this->response;
- $totallength = strlen($this->response);
- do {
- $headerlength = strpos($this->response,"rnrn");
- $response_headers = explode("rn",substr($this->response,0,$headerlength));
- $http_status = trim(array_shift($response_headers));
- foreach ($response_headers as $line) {
- list($k,$v) = explode(":",$line,2);
- $this->response_headers[trim($k)] = trim($v);
- }
- $this->response = substr($this->response,$headerlength+4);
- /* // Handled in-transfer now
- if (($this->response_headers['Transfer-Encoding']=="chunked") && (!$curl_mode)) {
- $this->remove_chunkiness();
- }
- */
- if (!preg_match("/^HTTP/([0-9.]+) ([0-9]+) (.*?)$/",$http_status,$matches)) {
- $matches = array("",$this->version,0,"HTTP request error");
- }
- list (,$response_version,$this->result_code,$this->result_text) = $matches;
- // skip HTTP result code 100 (Continue) responses
- } while (($this->result_code==100) && ($headerlength));
- // record some statistics, roughly compatible with CURL's curl_getinfo()
- if (!$curl_mode) {
- $total_time = $this->getmicrotime() - $time_request_start;
- $transfer_time = $total_time - $connect_time;
- $this->stats = array(
- "total_time"=>$total_time,
- "connect_time"=>$connect_time, // time between connection request and connection established
- "process_time"=>$process_time, // time between HTTP request and first data (non-headers) received
- "url"=>$url,
- "content_type"=>$this->response_headers["Content-Type"],
- "http_code"=>$this->result_code,
- "header_size"=>$headerlength,
- "request_size"=>$totallength,
- "filetime"=>strtotime($this->response_headers["Date"]),
- "pretransfer_time"=>$connect_time,
- "size_download"=>$totallength,
- "speed_download"=>$transfer_time > 0 ? round($totallength / $transfer_time) : 0,
- "download_content_length"=>$totallength,
- "upload_content_length"=>0,
- "starttransfer_time"=>$connect_time,
- );
- }
- $ok = ($this->result_code==200);
- if ($ok) {
- // if a page preprocessor is defined, call it to process the page contents
- if (is_callable($this->page_preprocessor)) $this->response = call_user_func($this->page_preprocessor,$this,$this->response);
- // if caching is enabled, save the page
- if ($this->caching) $this->_cache_store($cachetoken,$url);
- }
- return $ok;
- }
- function validate_response_cookie($cookie,$actual_hostname) {
- // make sure the cookie can't be set for a TLD, eg: '.com'
- $cookiehost = $cookie['domain'];
- $p = strrpos($cookiehost,'.');
- if ($p===false) return false;
- $tld = strtolower(substr($cookiehost,$p+1));
- $special_domains = array("com", "edu", "net", "org", "gov", "mil", "int");
- $periods_required = in_array($tld,$special_domains) ? 1 : 2;
- $periods = substr_count($cookiehost,'.');
- if ($periods<$periods_required) return false;
- if (substr($actual_hostname,0,1)!='.') $actual_hostname = '.'.$actual_hostname;
- if (substr($cookiehost,0,1)!='.') $cookiehost = '.'.$cookiehost;
- $domain_match = (
- ($actual_hostname==$cookiehost) ||
- (substr($actual_hostname,-strlen($cookiehost))==$cookiehost)
- );
- return $domain_match;
- }
- function build_headers() {
- $headers = "";
- foreach ($this->headers as $name=>$value) {
- $value = trim($value);
- if (empty($value)) continue;
- $headers .= "{$name}: {$value}rn";
- }
- if (isset($this->request_cookies) && is_array($this->request_cookies)) {
- $cookielist = array();
- foreach ($this->request_cookies as $name=>$value) {
- $cookielist[] = "{$name}={$value}";
- }
- if (count($cookielist)) $headers .= "Cookie: ".implode('; ',$cookielist)."rn";
- }
- $headers .= "rn";
- return $headers;
- }
- // opposite of parse_url()
- function rebuild_url($urlinfo) {
- $url = $urlinfo['scheme'].'://';
- if ($urlinfo['user'] || $urlinfo['pass']) {
- $url .= $urlinfo['user'];
- if ($urlinfo['pass']) {
- if ($urlinfo['user']) $url .= ':';
- $url .= $urlinfo['pass'];
- }
- $url .= '@';
- }
- $url .= $urlinfo['host'];
- if ($urlinfo['port']) $url .= ':'.$urlinfo['port'];
- $url .= $urlinfo['path'];
- if ($urlinfo['query']) $url .= '?'.$urlinfo['query'];
- if ($urlinfo['fragment']) $url .= '#'.$urlinfo['fragment'];
- return $url;
- }
- function _replace_hostname(&$url,$new_hostname) {
- $parts = parse_url($url);
- $old_hostname = $parts['host'];
- $parts['host'] = $new_hostname;
- $url = $this->rebuild_url($parts);
- return $old_hostname;
- }
- function _curl_request($url) {
- $this->error = false;
- // if a direct connection IP address was specified, replace the hostname
- // in the URL with the IP address, and set the Host: header to the
- // original hostname
- if ($this->connect_ip) {
- $old_hostname = $this->_replace_hostname($url,$this->connect_ip);
- $this->headers["Host"] = $old_hostname;
- }
- unset($this->headers["Content-Length"]);
- $headers = explode("n",$this->build_headers());
- $ch = curl_init();
- curl_setopt($ch,CURLOPT_URL, $url);
- curl_setopt($ch,CURLOPT_USERAGENT, $this->headers["User-Agent"]);
- curl_setopt($ch,CURLOPT_HEADER, 1);
- curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);
- // curl_setopt($ch,CURLOPT_FOLLOWLOCATION, 1); // native method doesn't support this yet, so it's disabled for consistency
- curl_setopt($ch,CURLOPT_TIMEOUT, 10);
- if ($this->curl_proxy) {
- curl_setopt($ch,CURLOPT_PROXY,$this->curl_proxy);
- }
- curl_setopt($ch,CURLOPT_HTTPHEADER, $headers);
- if ($this->method=="POST") {
- curl_setopt($ch,CURLOPT_POST,1);
- curl_setopt($ch,CURLOPT_POSTFIELDS,$this->post_data);
- }
- if ($this->insecure_ssl) {
- curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,0);
- }
- if ($this->ignore_ssl_hostname) {
- curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,1);
- }
- $this->response = curl_exec ($ch);
- if (curl_errno($ch)!=0) {
- $this->error = "CURL error #".curl_errno($ch).": ".curl_error($ch);
- }
- $this->stats = curl_getinfo($ch);
- curl_close($ch);
- return ($this->error === false);
- }
- function progress($level,$msg) {
- if (is_callable($this->progress_callback)) call_user_func($this->progress_callback,$level,$msg);
- }
- // Gets any available HTTPRetriever error message (including both internal
- // errors and HTTP errors)
- function get_error() {
- return $this->error ? $this->error : 'HTTP ' . $this->result_code.': '.$this->result_text;
- }
- function get_content_type() {
- if (!$ctype = $this->response_headers['Content-Type']) {
- $ctype = $this->response_headers['Content-type'];
- }
- list($ctype,) = explode(';',$ctype);
- return strtolower($ctype);
- }
- function update_transfer_counters() {
- if (is_callable($this->transfer_callback)) call_user_func($this->transfer_callback,$this->received_bytes,$this->expected_bytes);
- }
- function set_transfer_display($enabled = true) {
- if ($enabled) {
- $this->transfer_callback = array(&$this,'default_transfer_callback');
- } else {
- unset($this->transfer_callback);
- }
- }
- function set_progress_display($enabled = true) {
- if ($enabled) {
- $this->progress_callback = array(&$this,'default_progress_callback');
- } else {
- unset($this->progress_callback);
- }
- }
- function default_progress_callback($severity,$message) {
- $severities = array(
- HRP_DEBUG=>'debug',
- HRP_INFO=>'info',
- HRP_ERROR=>'error',
- );
- echo date('Y-m-d H:i:sa').' ['.$severities[$severity].'] '.$message."n";
- flush();
- }
- function default_transfer_callback($transferred,$expected) {
- $msg = "Transferred " . round($transferred/1024,1);
- if ($expected>=0) $msg .= "/" . round($expected/1024,1);
- $msg .= "KB";
- if ($expected>0) $msg .= " (".round($transferred*100/$expected,1)."%)";
- echo date('Y-m-d H:i:sa')." $msgn";
- flush();
- }
- function getmicrotime() {
- list($usec, $sec) = explode(" ",microtime());
- return ((float)$usec + (float)$sec);
- }
- }
- ?>