| 1: | <?php |
| 2: | |
| 3: | namespace ZCL\Captcha; |
| 4: | |
| 5: | |
| 6: | |
| 7: | |
| 8: | |
| 9: | |
| 10: | |
| 11: | class Captcha extends \Zippy\Html\HtmlComponent implements \Zippy\Interfaces\AjaxRender, \Zippy\Interfaces\Requestable |
| 12: | { |
| 13: | |
| 14: | private static $timeout = 120; |
| 15: | private $refresh; |
| 16: | protected $code; |
| 17: | protected $created; |
| 18: | public $x = 60; |
| 19: | public $y = 20; |
| 20: | |
| 21: | |
| 22: | |
| 23: | |
| 24: | |
| 25: | |
| 26: | |
| 27: | |
| 28: | public function __construct($id, $refresh = true) { |
| 29: | parent::__construct($id); |
| 30: | $this->refresh = $refresh; |
| 31: | $this->Refresh(); |
| 32: | } |
| 33: | |
| 34: | |
| 35: | |
| 36: | |
| 37: | |
| 38: | |
| 39: | protected function OnImage() { |
| 40: | $im = imagecreate($this->x, $this->y); |
| 41: | $bg = imagecolorallocate($im, 200, 255, 200); |
| 42: | $textcolor = imagecolorallocate($im, rand(0, 255), rand(0, 200), rand(0, 255)); |
| 43: | |
| 44: | imagestring($im, 5, 2, 2, $this->code, $textcolor); |
| 45: | |
| 46: | for ($i = 0; $i < 5; $i++) { |
| 47: | $color = imagecolorallocate($im, rand(0, 255), rand(0, 200), rand(0, 255)); |
| 48: | imageline($im, rand(0, 10), rand(1, 20), rand(50, 80), rand(1, 50), $color); |
| 49: | } |
| 50: | ob_start(); |
| 51: | imagepng($im); |
| 52: | $contents = ob_get_contents(); |
| 53: | ob_end_clean(); |
| 54: | |
| 55: | return $contents; |
| 56: | } |
| 57: | |
| 58: | |
| 59: | |
| 60: | |
| 61: | |
| 62: | protected function OnCode() { |
| 63: | $chars = 'abdefhknrstyz23456789'; |
| 64: | $length = rand(4, 6); |
| 65: | $numChars = strlen($chars); |
| 66: | $str = ''; |
| 67: | for ($i = 0; $i < $length; $i++) { |
| 68: | $str .= substr($chars, rand(1, $numChars) - 1, 1); |
| 69: | } |
| 70: | return $str; |
| 71: | } |
| 72: | |
| 73: | |
| 74: | |
| 75: | |
| 76: | |
| 77: | public function checkCode($code) { |
| 78: | if ($this->created + self::$timeout < time()) { |
| 79: | return false; |
| 80: | } |
| 81: | return $this->code == $code; |
| 82: | } |
| 83: | |
| 84: | |
| 85: | |
| 86: | |
| 87: | |
| 88: | public function Refresh() { |
| 89: | $this->code = $this->OnCode(); |
| 90: | $this->created = time(); |
| 91: | } |
| 92: | |
| 93: | |
| 94: | |
| 95: | |
| 96: | |
| 97: | |
| 98: | |
| 99: | |
| 100: | public function RequestHandle() { |
| 101: | |
| 102: | if (\Zippy\WebApplication::$app->getRequest()->isAjaxRequest()) { |
| 103: | $this->Refresh(); |
| 104: | \Zippy\WebApplication::$app->getResponse()->addAjaxResponse($this->AjaxAnswer()); |
| 105: | } |
| 106: | } |
| 107: | |
| 108: | |
| 109: | |
| 110: | |
| 111: | |
| 112: | protected function RenderImpl() { |
| 113: | |
| 114: | $url = $this->owner->getURLNode() . "::" . $this->id . "&ajax=true"; |
| 115: | if ($this->refresh) { |
| 116: | $this->setAttribute("onclick", "getUpdate('{$url}');event.returnValue=false; return false;"); |
| 117: | } |
| 118: | $im = $this->OnImage(); |
| 119: | |
| 120: | $src = "data:image/png;base64," . base64_encode($im); |
| 121: | |
| 122: | $this->setAttribute('src', $src); |
| 123: | } |
| 124: | |
| 125: | |
| 126: | |
| 127: | |
| 128: | |
| 129: | public function AjaxAnswer() { |
| 130: | $im = $this->OnImage(); |
| 131: | |
| 132: | $src = "data:image/png;base64," . base64_encode($im); |
| 133: | return "$('#{$this->id}').attr('src','{$src}')"; |
| 134: | } |
| 135: | |
| 136: | |
| 137: | |
| 138: | |
| 139: | |
| 140: | public function getCode() { |
| 141: | return $this->code; |
| 142: | } |
| 143: | |
| 144: | } |
| 145: | |
| 146: | |
| 147: | |