default.diff

diff --git a/lib/Cake/Network/CakeRequest.php b/lib/Cake/Network/CakeRequest.php
index cadbbbd..dfa1d3e 100644
--- a/lib/Cake/Network/CakeRequest.php
+++ b/lib/Cake/Network/CakeRequest.php
@@ -694,26 +694,7 @@ class CakeRequest implements ArrayAccess {
  * @return array An array of prefValue => array(content/types)
  */
 	public function parseAccept() {
-		$accept = array();
-		$header = explode(',', $this->header('accept'));
-		foreach (array_filter($header) as $value) {
-			$prefPos = strpos($value, ';');
-			if ($prefPos !== false) {
-				$prefValue = substr($value, strpos($value, '=') + 1);
-				$value = trim(substr($value, 0, $prefPos));
-			} else {
-				$prefValue = '1.0';
-				$value = trim($value);
-			}
-			if (!isset($accept[$prefValue])) {
-				$accept[$prefValue] = array();
-			}
-			if ($prefValue) {
-				$accept[$prefValue][] = $value;
-			}
-		}
-		krsort($accept);
-		return $accept;
+		return $this->_parseAcceptWithQualifier($this->header('accept'));
 	}
 
 /**
@@ -731,17 +712,51 @@ class CakeRequest implements ArrayAccess {
  * @return If a $language is provided, a boolean. Otherwise the array of accepted languages.
  */
 	public static function acceptLanguage($language = null) {
-		$accepts = preg_split('/[;,]/', self::header('Accept-Language'));
-		foreach ($accepts as &$accept) {
-			$accept = strtolower($accept);
-			if (strpos($accept, '_') !== false) {
-				$accept = str_replace('_', '-', $accept);
+		$raw = self::_parseAcceptWithQualifier(self::header('Accept-Language'));
+		$accept = array();
+		foreach ($raw as $qualifier => $languages) {
+			foreach ($languages as &$lang) {
+				if (strpos($lang, '_')) {
+					$lang = str_replace('_', '-', $lang);
+				}
+				$lang = strtolower($lang);
 			}
+			$accept = array_merge($accept, $languages);
 		}
 		if ($language === null) {
-			return $accepts;
+			return $accept;
 		}
-		return in_array($language, $accepts);
+		return in_array(strtolower($language), $accept);
+
+	}
+
+/**
+ * Parse Accept* headers with qualifier options
+ *
+ * @param string $header
+ * @return array
+ */
+	protected static function _parseAcceptWithQualifier($header) {
+		$accept = array();
+		$header = explode(',', $header);
+		foreach (array_filter($header) as $value) {
+			$prefPos = strpos($value, ';');
+			if ($prefPos !== false) {
+				$prefValue = substr($value, strpos($value, '=') + 1);
+				$value = trim(substr($value, 0, $prefPos));
+			} else {
+				$prefValue = '1.0';
+				$value = trim($value);
+			}
+			if (!isset($accept[$prefValue])) {
+				$accept[$prefValue] = array();
+			}
+			if ($prefValue) {
+				$accept[$prefValue][] = $value;
+			}
+		}
+		krsort($accept);
+		return $accept;
 	}
 
 /**
diff --git a/lib/Cake/Test/Case/Network/CakeRequestTest.php b/lib/Cake/Test/Case/Network/CakeRequestTest.php
index 8ef0e18..6231050 100644
--- a/lib/Cake/Test/Case/Network/CakeRequestTest.php
+++ b/lib/Cake/Test/Case/Network/CakeRequestTest.php
@@ -1739,19 +1739,41 @@ class CakeRequestTest extends CakeTestCase {
  * @return void
  */
 	public function testAcceptLanguage() {
+		// Weird language
 		$_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'inexistent,en-ca';
 		$result = CakeRequest::acceptLanguage();
 		$this->assertEquals(array('inexistent', 'en-ca'), $result, 'Languages do not match');
 
-		$_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'es_mx;en_ca';
+		// No qualifier
+		$_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'es_mx,en_ca';
 		$result = CakeRequest::acceptLanguage();
 		$this->assertEquals(array('es-mx', 'en-ca'), $result, 'Languages do not match');
 
+		// With qualifier
+		$_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'en-US,en;q=0.8,pt-BR;q=0.6,pt;q=0.4';
+		$result = CakeRequest::acceptLanguage();
+		$this->assertEquals(array('en-us', 'en', 'pt-br', 'pt'), $result, 'Languages do not match');
+
+		// With spaces
+		$_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'da, en-gb;q=0.8, en;q=0.7';
+		$result = CakeRequest::acceptLanguage();
+		$this->assertEquals(array('da', 'en-gb', 'en'), $result, 'Languages do not match');
+
+		// Checking if requested
+		$_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'es_mx,en_ca';
+		$result = CakeRequest::acceptLanguage();
+
 		$result = CakeRequest::acceptLanguage('en-ca');
 		$this->assertTrue($result);
 
+		$result = CakeRequest::acceptLanguage('en-CA');
+		$this->assertTrue($result);
+
 		$result = CakeRequest::acceptLanguage('en-us');
 		$this->assertFalse($result);
+
+		$result = CakeRequest::acceptLanguage('en-US');
+		$this->assertFalse($result);
 	}
 
 /**