<?php

class HTTP {

public $cookie_file = 'cookies/cookie.txt';

public $errors = array();

public $follow = TRUE;

public $force_fresh = TRUE;

public $max_redirects = 4;

public $method = 'POST';

public $options = array();

public $page = NULL;

public $query = array();

public $referer = NULL;

public $return_body = TRUE;

public $return_header = FALSE;

public $return_transfer = TRUE;

public $ssl_certficate = FALSE;

public $timeout = 25;

public $url = NULL;

public $webbot = NULL;

protected $page_info = array();

public function __construct()

{

if (extension_loaded("curl") === FALSE) {

$this->set_error("The cURL extension was not found on your server. Learn how to install here: http://www.php.net/curl/");

exit();

}

}

public function connect($url=NULL, $method='GET', $return=TRUE)

{

if (empty($url)) {

$this->set_error("No URL to open.");

exit();

}

$this->errors = array();

$method = trim(strtoupper($method));

$options = array();

$ch = curl_init();

$options[CURLOPT_URL] = $url;

$options[CURLOPT_COOKIEFILE] = $this->cookie_file;

$options[CURLOPT_COOKIEJAR] = $this->cookie_file;

$options[CURLOPT_FRESH_CONNECT] = $this->force_fresh;

$options[CURLOPT_FOLLOWLOCATION] = $this->follow;

$options[CURLOPT_HEADER] = $this->return_header;

$options[CURLOPT_MAXREDIRS] = $this->max_redirects;

$options[CURLOPT_NOBODY] = ($this->return_body === TRUE) ? FALSE : TRUE;

$options[CURLOPT_REFERER] = (empty($this->referer)) ? $url : $this->referer;

$options[CURLOPT_RETURNTRANSFER] = $this->return_transfer;

$options[CURLOPT_SSL_VERIFYPEER] = $this->ssl_certficate;

$options[CURLOPT_TIMEOUT] = $this->timeout;

$options[CURLOPT_USERAGENT] = $this->webbot;

if ($method == 'GET') {

$query = $this->format_query();

$query = (! empty($query)) ? "?" . $query : $query;

$options[CURLOPT_URL] = $url . $query;

$options[CURLOPT_HTTPGET] = TRUE;

$options[CURLOPT_POST] = FALSE;

}

elseif ($method == 'POST') {

$query = $this->format_query();

if (! empty($query)) { $options[CURLOPT_POSTFIELDS] = $query; }

$options[CURLOPT_HTTPGET] = FALSE;

$options[CURLOPT_POST] = TRUE;

}

else {

$options[CURLOPT_CUSTOMREQUEST] = strtoupper($this->method);

if (@count($this->query) >= 1) {

$options[CURLOPT_POSTFIELDS] = $this->query;

}

}

foreach ($this->options as $property => $value) {

$options[strtoupper($property)] = $value;

}

foreach ($options as $property => $value) {

@curl_setopt($ch, $property, $value);

}

$this->page = curl_exec($ch);

$this->page_info = curl_getinfo($ch);

$e = curl_error($ch);

(! empty($e)) ? $this->set_error($e) : NULL;

curl_close($ch);

if ($return === TRUE) { return $this->page; }

}

public function errors()

{

return ($this->total_errors() >= 1) ? TRUE : FALSE;

}

protected function format_query()

{

$tmp = NULL;

if (count($this->query) > 0) {

foreach ($this->query as $field => $value) {

$tmp .= $field . "=" . urlencode($value) . "&";

}

return substr($tmp, 0, strlen($tmp)-1);

}

return "";

}

protected function get_errors()

{

return @count($this->http_errors);

}

protected function get_status()

{

$status = array(

100 => "100 Continue",

101 => "101 Switching Protocols",

200 => "200 OK",

201 => "201 Created",

202 => "202 Accepted",

203 => "203 Non-Authoritative Information",

204 => "204 No Content",

205 => "205 Reset Content",

206 => "206 Partial Content",

300 => "300 Multiple Choices",

301 => "301 Moved Permanently",

302 => "302 Found",

303 => "303 See Other",

304 => "304 Not Modified",

305 => "305 Use Proxy",

306 => "306 (Unused)",

307 => "307 Temporary Redirect",

400 => "400 Bad Request",

401 => "401 Unauthorized",

402 => "402 Payment Required",

403 => "403 Forbidden",

404 => "404 Not Found",

405 => "405 Method Not Allowed",

406 => "406 Not Acceptable",

407 => "407 Proxy Authentication Required",

408 => "408 Request Timeout",

409 => "409 Conflict",

410 => "410 Gone",

411 => "411 Length Required",

412 => "412 Precondition Failed",

413 => "413 Request Entity Too Large",

414 => "414 Request-URI Too Long",

415 => "415 Unsupported Media Type",

416 => "416 Requested Range Not Satisfiable",

417 => "417 Expectation Failed",

500 => "500 Internal Server Error",

501 => "501 Not Implemented",

502 => "502 Bad Gateway",

503 => "503 Service Unavailable",

504 => "504 Gateway Timeout",

505 => "505 HTTP Version Not Supported"

);

return $status[$this->page_info['http_code']];

}

public function print_errors($d=NULL)

{

if (empty($d)) {

print "<pre>";

print_r($this->errors);

print "</pre>";

}

else {

print implode($d, $this->errors);

}

}

protected function set_error($msg)

{

array_push($this->errors, $msg);

}

public function total_errors()

{

return count($this->errors);

}

}

?>