diff --git a/tests/unit/framework/web/ResponseTest.php b/tests/unit/framework/web/ResponseTest.php
index b3d9080..2fde63d 100644
--- a/tests/unit/framework/web/ResponseTest.php
+++ b/tests/unit/framework/web/ResponseTest.php
@@ -41,7 +41,7 @@ class ResponseTest extends \yiiunit\TestCase
 		static::$httpResponseCode = 200;
 	}
 
-	public function ranges()
+	public function rightRanges()
 	{
 		// TODO test more cases for range requests and check for rfc compatibility
 		// http://www.w3.org/Protocols/rfc2616/rfc2616.txt
@@ -53,14 +53,14 @@ class ResponseTest extends \yiiunit\TestCase
 	}
 
 	/**
-	 * @dataProvider ranges
+	 * @dataProvider rightRanges
 	 */
 	public function testSendFileRanges($rangeHeader, $expectedHeader, $length, $expectedFile)
 	{
 		$content = $this->generateTestFileContent();
-
 		$_SERVER['HTTP_RANGE'] = 'bytes=' . $rangeHeader;
 		$sent = $this->runSendFile('testFile.txt', $content, null);
+
 		$this->assertEquals($expectedFile, $sent);
 		$this->assertTrue(in_array('HTTP/1.1 206 Partial Content', static::$headers));
 		$this->assertTrue(in_array('Accept-Ranges: bytes', static::$headers));
@@ -69,6 +69,30 @@ class ResponseTest extends \yiiunit\TestCase
 		$this->assertTrue(in_array('Content-Length: ' . $length, static::$headers));
 	}
 
+	public function wrongRanges()
+	{
+		// TODO test more cases for range requests and check for rfc compatibility
+		// http://www.w3.org/Protocols/rfc2616/rfc2616.txt
+		return array(
+			array('1-2,3-5,6-10'),	// multiple range request not supported
+			array('5-1'),			// last-byte-pos value is less than its first-byte-pos value
+			array('-100000'),		// last-byte-pos bigger then content length
+			array('10000-'),			// first-byte-pos bigger then content length
+		);
+	}
+
+	/**
+	 * @dataProvider wrongRanges
+	 */
+	public function testSendFileWrongRanges($rangeHeader)
+	{
+		$this->setExpectedException('yii\base\HttpException', 'Requested Range Not Satisfiable');
+
+		$content = $this->generateTestFileContent();
+		$_SERVER['HTTP_RANGE'] = 'bytes=' . $rangeHeader;
+		$this->runSendFile('testFile.txt', $content, null);
+	}
+
 	protected function generateTestFileContent()
 	{
 		return '12ёжик3456798áèabcdefghijklmnopqrstuvwxyz!"§$%&/(ёжик)=?';
@@ -83,4 +107,4 @@ class ResponseTest extends \yiiunit\TestCase
 		$file = ob_get_clean();
 		return $file;
 	}
-}
\ No newline at end of file
+}
diff --git a/yii/web/Response.php b/yii/web/Response.php
index 954c999..3140c54 100644
--- a/yii/web/Response.php
+++ b/yii/web/Response.php
@@ -50,7 +50,7 @@ class Response extends \yii\base\Response
 
 		if (isset($_SERVER['HTTP_RANGE'])) {
 			// client sent us a multibyte range, can not hold this one for now
-			if (strpos(',', $_SERVER['HTTP_RANGE']) !== false) {
+			if (strpos($_SERVER['HTTP_RANGE'],',') !== false) {
 				header("Content-Range: bytes $contentStart-$contentEnd/$fileSize");
 				throw new HttpException(416, 'Requested Range Not Satisfiable');
 			}
@@ -63,14 +63,18 @@ class Response extends \yii\base\Response
 			} else {
 				$range = explode('-', $range);
 				$contentStart = $range[0];
-				$contentEnd = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $fileSize - 1;
+
+				// check if the last-byte-pos presents in header
+				if ((isset($range[1]) && is_numeric($range[1]))) {
+					$contentEnd = $range[1];
+				}
 			}
 
 			/* Check the range and make sure it's treated according to the specs.
 			 * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
 			 */
 			// End bytes can not be larger than $end.
-			$contentEnd = ($contentEnd > $fileSize) ? $fileSize : $contentEnd;
+			$contentEnd = ($contentEnd > $fileSize) ? $fileSize -1 : $contentEnd;
 
 			// Validate the requested range and return an error if it's not correct.
 			$wrongContentStart = ($contentStart > $contentEnd || $contentStart > $fileSize - 1 || $contentStart < 0);