Fix response parsing when 100 Continue response contains optional headers

Author: zachborboa

src/Curl.class.php

@@ -284,7 +284,11 @@ private function parseResponse($response)
         $response_headers = '';
         if (!(strpos($response, "\r\n\r\n") === false)) {
             list($response_header, $response) = explode("\r\n\r\n", $response, 2);
-            if ($response_header === 'HTTP/1.1 100 Continue') {
+            $response_headers = array($response_header);
+            if (!(strpos($response_header, "\r\n") === false)) {
+                $response_headers = explode("\r\n", $response_header);
+            }
+            if (in_array('HTTP/1.1 100 Continue', $response_headers)) {
                 list($response_header, $response) = explode("\r\n\r\n", $response, 2);
             }
             $response_headers = $this->parseResponseHeaders($response_header);

tests/PHPCurlClass/PHPCurlClassTest.php

@@ -85,6 +85,39 @@ public function testPostRequestMethod() {
         )) === 'POST');
     }
 
+    public function testPostContinueResponse() {
+        // 100 Continue responses may contain additional optional headers per
+        // RFC 2616, Section 10.1:
+        // This class of status code indicates a provisional response,
+        // consisting only of the Status-Line and optional headers, and is
+        // terminated by an empty line.
+        $response =
+            'HTTP/1.1 100 Continue' . "\r\n" .
+            'Date: Fri, 01 Jan 1990 00:00:00 GMT' . "\r\n" .
+            'Server: PHP-Curl-Class' . "\r\n" .
+            "\r\n" .
+            'HTTP/1.1 200 OK' . "\r\n" .
+            'Date: Fri, 01 Jan 1990 00:00:00 GMT' . "\r\n" .
+            'Cache-Control: private' . "\r\n" .
+            'Vary: Accept-Encoding' . "\r\n" .
+            'Content-Length: 2' . "\r\n" .
+            'Content-Type: text/plain;charset=UTF-8' . "\r\n" .
+            'Server: PHP-Curl-Class' . "\r\n" .
+            'Connection: keep-alive' . "\r\n" .
+            "\r\n" .
+            'OK';
+
+        $reflector = new ReflectionClass('Curl');
+        $reflection_method = $reflector->getMethod('parseResponse');
+        $reflection_method->setAccessible(true);
+
+        $curl = new Curl();
+        list($response_headers, $response) = $reflection_method->invoke($curl, $response);
+
+        $this->assertEquals($response_headers['Status-Line'], 'HTTP/1.1 200 OK');
+        $this->assertEquals($response, 'OK');
+    }
+
     public function testPostData() {
         $test = new Test();
         $this->assertTrue($test->server('post', 'POST', array(