[Validator] Added a check DNS option on URL validator

saro0h · saro0h · commit e7516dbc440d · 2014-12-13T20:10:03.000+01:00
diff --git a/src/Symfony/Component/Validator/Constraints/Url.php b/src/Symfony/Component/Validator/Constraints/Url.php
@@ -23,6 +23,13 @@
  */
 class Url extends Constraint
 {
+    const HOST_CHECK_FAILED_ERROR = 1;
+
+    protected static $errorNames = array(
+        self::HOST_CHECK_FAILED_ERROR => 'HOST_CHECK_FAILED_ERROR',
+    );
+
     public $message = 'This value is not a valid URL.';
     public $protocols = array('http', 'https');
+    public $checkDNS = false;
 }
diff --git a/src/Symfony/Component/Validator/Constraints/UrlValidator.php b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
@@ -62,6 +62,22 @@ public function validate($value, Constraint $constraint)
             $this->buildViolation($constraint->message)
                 ->setParameter('{{ value }}', $this->formatValue($value))
                 ->addViolation();
+
+            return;
+        }
+
+        $host = parse_url($value, PHP_URL_HOST);
+
+        if ($constraint->checkDNS && !$this->checkHost($host)) {
+            $this->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $this->formatValue($host))
+                ->setCode(Url::HOST_CHECK_FAILED_ERROR)
+                ->addViolation();
         }
     }
+
+    private function checkHost($host)
+    {
+        return checkdnsrr($host, "A") || checkdnsrr($host, "AAAA");
+    }
 }

Original file line number	Diff line number	Diff line change
`@@ -23,6 +23,13 @@`
`23`	`23`	`*/`
`24`	`24`	`class Url extends Constraint`
`25`	`25`	`{`
	`26`	`+ const HOST_CHECK_FAILED_ERROR = 1;`
	`27`	`+`
	`28`	`+ protected static $errorNames = array(`
	`29`	`+ self::HOST_CHECK_FAILED_ERROR => 'HOST_CHECK_FAILED_ERROR',`
	`30`	`+ );`
	`31`	`+`
`26`	`32`	`public $message = 'This value is not a valid URL.';`
`27`	`33`	`public $protocols = array('http', 'https');`
	`34`	`+ public $checkDNS = false;`
`28`	`35`	`}`