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Posted By

dereklio on 06/10/08


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Juntalis


Http Bot class in PHP

 / Published in: PHP
 
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  1. <?php
  2.  
  3. require_once('HTTP/Client.php');
  4. require_once(dirname(__FILE__) . '/Shell.class.php');
  5.  
  6. class HttpBot {
  7.  
  8. 	private static $singleton;
  9.  
  10. 	public static function singleton() {
  11. 		if (!isset(self::$singleton)) {
  12. 			$c = __CLASS__;
  13. 			self::$singleton = new $c;
  14. 		}
  15.  
  16. 		return self::$singleton;
  17. 	}
  18.  
  19. 	private $http;
  20.  
  21. 	private function __construct() {
  22. 		$shell = Shell::singleton();
  23. 		$this->http = new HTTP_Client;
  24. 		$this->signature_purge(2);
  25.  
  26. 		// debug codes, enabled for debug
  27. 		$this->signature_purge(0);
  28. 	}
  29.  
  30. 	public function __clone() {
  31. 		trigger_error('Clone is not allowed.', E_USER_ERROR);
  32. 	}
  33.  
  34. 	public function signature_exists($html) {
  35. 		$shell = Shell::singleton();
  36. 		return file_exists($shell->temp(md5($html) . '.sig'));
  37. 	}
  38.  
  39. 	public function signature_save($html) {
  40. 		$shell = Shell::singleton();
  41. 		return $shell->touch_file($shell->temp(md5($html) . '.sig'));
  42. 	}
  43.  
  44. 	public function signature_purge($days_old) {
  45. 		$shell = Shell::singleton();
  46. 		if ($dh = opendir($shell->temp())) {
  47. 			while (($file = readdir($dh)) !== false) {
  48. 				$path = $shell->temp($file);
  49. 				if (is_file($path)) {
  50. 					if ((time() - filemtime($path)) / 3600 / 24 > $days_old) {
  51. 						if (array_pop(explode('.', $file)) == 'sig') {
  52. 							unlink($path);
  53. 						}
  54. 					}
  55. 				}
  56. 			}
  57. 			closedir($dh);
  58. 		}
  59. 	}
  60.  
  61. 	private function assert_response($code, $text = false) {
  62. 		if ($code != 200) {
  63. 			if ($text !== false) trigger_error($text . ' (Response Code: ' . $code . ')', E_USER_ERROR);
  64. 			return false;
  65. 		}
  66. 		return true;
  67. 	}
  68.  
  69. 	private function assert_text($body, $chk, $text = false) {
  70. 		if (strpos($body, $chk) === false) {
  71. 			if ($text !== false) trigger_error($text, E_USER_ERROR);
  72. 			return false;
  73. 		}
  74. 		return true;
  75. 	}
  76.  
  77. 	public function normalize_string($text) {
  78. 		$text = str_replace(array("\r", "\n", "\t"), " ", $text);
  79. 		while (strpos($text, '  ') !== false) {
  80. 			$text = str_replace('  ', ' ', $text);
  81. 		}
  82. 		return trim($text);
  83. 	}
  84.  
  85. 	public function response($encoding = false) {
  86. 		$shell = Shell::singleton();
  87. 		$resp = $this->http->currentResponse();
  88. 		$raw = $resp['body'];
  89.  
  90. 		if ($encoding !== false) {
  91. 			$raw = $shell->concmd_utf8($raw, $encoding);
  92. 		}
  93. 		$raw = iconv('utf-8', 'utf-8//IGNORE', $raw);
  94.  
  95. 		$body = mb_convert_encoding($raw, 'HTML-ENTITIES', 'utf-8');
  96.  
  97. 		$dom = new DOMDocument;
  98. 		$dom->preserveWhiteSpace = false;
  99. 		@$dom->loadHTML($body);
  100.  
  101. 		$xpath = new DOMXPath($dom);
  102.  
  103. 		return array($dom, $xpath, $raw);
  104. 	}
  105.  
  106. 	public function geta($url, $error = false) {
  107. 		return $this->assert_response($this->http->get($url), $error);
  108. 	}
  109.  
  110. 	public function posta($url, $data, $error = false) {
  111. 		return $this->assert_response($this->http->post($url, $data), $error);
  112. 	}
  113.  
  114. 	public function contenta($chk, $text = false) {
  115. 		$resp = $this->http->currentResponse();
  116. 		return $this->assert_text($resp['body'], $chk, $text);
  117. 	}
  118.  
  119. }
  120.  
  121. ?>

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Posted By: Sn0opy on June 11, 2008

What does this bot do?

Posted By: dereklio on June 11, 2008

i have never thought there is someone comments on my codes, as i am just putting some of my frequently used snippets online ;)

in short, it does nothing. This class basically is a wrapper of the HTTPClient PEAR package. it just groups several functions of the HTTPClient which i used very frequently together. and it's needed to be used in conjunction of my other class "Shell.class.php" (http://snipplr.com/view/6648/a-shell-access-wrapper-for-windows-in-php/)

let's say, I want to write a script that log me into facebook and write something on someone's else wall.... I would simply do:

$http = HttpBot::singleton(); $http->geta('http://www.facebook.com', 'Unable to connect to Facebook'); if ($http->contenta('logout') === false) { // Login required, login now!

list($dom, $xpath) = $http->response();

$challenge = $dom->getElementById('challenge')->getAttribute('value');
$data = array(
    'email' => USERNAME,
    'pass' => PASSWORD,
    'challenge' => $challenge,
    'md5pass' => '1',
    'noerror' => '1',
);
$http->posta(https://login.facebook.com/login.php, $data, 'Unable to login');
$http->contenta('logout', 'Login failed');

}

i used this script to create several scheduled tasks in windows to collect / poll different contents from internet, summarize and email to me on a daily basis. it may not be a very elegant solution, but it just gives me some shorthand, while dealing with the HTTP_Client class.

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