#76 Check content-length before to decode response body

src/Response.php

@@ -564,6 +564,11 @@ protected function decodeGzip($body)
             );
         }
 
+        if ($this->getHeaders()->has('content-length')
+            && 0 === (int) $this->getHeaders()->get('content-length')->getFieldValue()) {
+            return '';
+        }
+
         ErrorHandler::start();
         $return = gzinflate(substr($body, 10));
         $test = ErrorHandler::stop();
@@ -594,6 +599,11 @@ protected function decodeDeflate($body)
             );
         }
 
+        if ($this->getHeaders()->has('content-length')
+            && 0 === (int) $this->getHeaders()->get('content-length')->getFieldValue()) {
+            return '';
+        }
+
         /**
          * Some servers (IIS ?) send a broken deflate response, without the
          * RFC-required zlib header.

test/ResponseTest.php

@@ -125,6 +125,28 @@ public function testGzipResponse()
         $this->assertEquals('f24dd075ba2ebfb3bf21270e3fdc5303', md5($res->getContent()));
     }
 
+    public function testGzipResponseWithEmptyBody()
+    {
+        $responseTest = <<<'REQ'
+HTTP/1.1 200 OK
+Date: Sun, 25 Jun 2006 19:36:47 GMT
+Server: Apache
+X-powered-by: PHP/5.1.4-pl3-gentoo
+Content-encoding: gzip
+Vary: Accept-Encoding
+Content-length: 0
+Connection: close
+Content-type: text/html
+
+REQ;
+
+        $res = Response::fromString($responseTest);
+
+        $this->assertEquals('gzip', $res->getHeaders()->get('Content-encoding')->getFieldValue());
+        $this->assertSame('', $res->getBody());
+        $this->assertSame('', $res->getContent());
+    }
+
     public function testDeflateResponse()
     {
         $responseTest = file_get_contents(__DIR__ . '/_files/response_deflate');
@@ -136,6 +158,28 @@ public function testDeflateResponse()
         $this->assertEquals('ad62c21c3aa77b6a6f39600f6dd553b8', md5($res->getContent()));
     }
 
+    public function testDeflateResponseWithEmptyBody()
+    {
+        $responseTest = <<<'REQ'
+HTTP/1.1 200 OK
+Date: Sun, 25 Jun 2006 19:38:02 GMT
+Server: Apache
+X-powered-by: PHP/5.1.4-pl3-gentoo
+Content-encoding: deflate
+Vary: Accept-Encoding
+Content-length: 0
+Connection: close
+Content-type: text/html
+
+REQ;
+
+        $res = Response::fromString($responseTest);
+
+        $this->assertEquals('deflate', $res->getHeaders()->get('Content-encoding')->getFieldValue());
+        $this->assertSame('', $res->getBody());
+        $this->assertSame('', $res->getContent());
+    }
+
     /**
      * Make sure wer can handle non-RFC complient "deflate" responses.
      *