Implement HttpResponseHeaders::GetContentRange and unittests

Parse "Content-Range" header in HttpResponseHeaders according to
RFC 2616 14.16.

Review URL: http://codereview.chromium.org/88068

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14238 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 1 deletions

diff --git a/net/http/http_response_headers.h b/net/http/http_response_headers.h
index e9b2c4b..830c09c 100644
--- a/net/http/http_response_headers.h
+++ b/net/http/http_response_headers.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -196,6 +196,17 @@ class HttpResponseHeaders :
   // no such header in the response.
   int64 GetContentLength() const;
 
+  // Extracts the values in Content-Range header, if the header exists and is
+  // well formatted returns true, else returns false.
+  // The following values will be outputted:
+  // |*first_byte_position| = inclusive position of the first byte of the range
+  // |*last_byte_position| = inclusive position of the last byte of the range
+  // |*instance_length| = size in bytes of the object requested
+  // If any of the above values is unknown, its value will be -1.
+  bool GetContentRange(int64* first_byte_position,
+                       int64* last_byte_position,
+                       int64* instance_length) const;
+
   // Returns the HTTP response code.  This is 0 if the response code text seems
   // to exist but could not be parsed.  Otherwise, it defaults to 200 if the
   // response code is not found in the raw headers.