<?php

class Curl {
	var $curl;
    var $manual_follow;
    var $redirect_url;
	var $cookiefile;
	var $used;
	var $authinfo;
	var $setred;

	function Curl() {
		if(!$this->cookiefile){
			$this->setred = true;
			$this->cookiefile = tempnam("tmp","COO");
		}
		$this->used++;
		
		$this->curl = curl_init();
		curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($this->curl, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)');
		curl_setopt($this->curl, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($this->curl, CURLOPT_AUTOREFERER, true);
		curl_setopt($this->curl, CURLOPT_COOKIEJAR, $this->cookiefile);
		curl_setopt($this->curl, CURLOPT_COOKIEFILE, $this->cookiefile);
        curl_setopt($this->curl, CURLOPT_HEADER, true);
	
        //$this->setRedirect();

		

	}

	function getInstance() {
		static $instance;
		if (!isset($instance)) {
			$curl =& new Curl;
			$instance = array($curl);
		}
		return $instance[0];
	}

    function setTimeout($connect, $transfer) {
        curl_setopt($this->curl, CURLOPT_CONNECTTIMEOUT, $connect);
        curl_setopt($this->curl, CURLOPT_TIMEOUT, $transfer);
    }

    function getError() {
        return curl_errno($this->curl) ? curl_error($this->curl) : false;
    }

    function disableRedirect() {
        $this->setRedirect(false);
    }

    function setRedirect($enable = true) {
		$this->setred = $enable;
	}

    function getHttpCode() {
        return curl_getinfo($this->curl, CURLINFO_HTTP_CODE);
    }

	function auth($user, $pass) {
		$this->authinfo = "$user:$pass";
		
	}

	function makeQuery($data) { 
		if (is_array($data)) {
			$fields = array();
			foreach ($data as $key => $value) {
 				$fields[] = $key . '=' . urlencode($value);
			}
			$fields = implode('&', $fields);
		} else {
			$fields = $data;
		}

		return $fields;
	}
	
    // FOLLOWLOCATION manually if we need to
	function maybeFollow($page) {
        if (strpos($page, "\r\n\r\n") !== false) {
            list($headers, $page) = explode("\r\n\r\n", $page, 2);
        }

        $code = $this->getHttpCode();
        if ($code > 300 && $code < 310) {
            preg_match("#Location: ?(.*)#i", $headers, $match);
            $this->redirect_url = trim($match[1]);

	        if ($this->manual_follow) {
                return $this->get($this->redirect_url);
            }
        } else {
            $this->redirect_url = '';
        }
            
	    return $page;
	}
	
	function post($url, $data , $ref = '') {
		if($this->used > 0){
			$this->Curl();
		}

		$fields = $this->makeQuery($data);
		
		curl_setopt($this->curl, CURLOPT_URL, $url);
		curl_setopt($this->curl, CURLOPT_POST, true);
		curl_setopt($this->curl, CURLOPT_POSTFIELDS, $fields);
		curl_setopt($this->curl, CURLOPT_HEADER, true);
		
		if($ref){
			curl_setopt($this->curl, CURLOPT_REFERER, $ref);
		}

		if ($this->setred) {
	        $this->manual_follow = !@curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, true);
        } else {
	        @curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, false);
            $this->manual_follow = false;
        }
		
		if($this->authinfo) curl_setopt($this->curl, CURLOPT_USERPWD, $this->authinfo);

		$page = curl_exec($this->curl);
			
		$error = curl_errno($this->curl);	
		if ($error != CURLE_OK || empty($page)) {
			return false;
		}

		//curl_setopt($this->curl, CURLOPT_POST, false);
		//curl_setopt($this->curl, CURLOPT_POSTFIELDS, '');
		
		return $this->maybeFollow($page);
	}
	
	function get($url, $data = null) {
		if($this->used > 0){
			$this->Curl();
		}

        if (!is_null($data)) {
            $fields = $this->makeQuery($data);
            $url .= '?' . $fields;
        }

		curl_setopt($this->curl, CURLOPT_URL, $url);
		if($this->authinfo) curl_setopt($this->curl, CURLOPT_USERPWD, $this->authinfo);
		if ($this->setred) {
	        $this->manual_follow = !@curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, true);
        } else {
	        @curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, false);
            $this->manual_follow = false;
        }

		$page = curl_exec($this->curl);
		
		$error = curl_errno($this->curl);

		if ($error != CURLE_OK || empty($page)) {
			return false;
		}
		
		return $this->maybeFollow($page);
	}
}

?>