Supports single range request with file protocol

Added range request support in URLRequestFileJob to respect
"Range" HTTP header. Fail with ERR_REQUESTED_RANGE_NOT_SATISFIABLE
if range is bad.
The following range request modes are supported:
1. Fully specified: bytes=x-y
2. With first byte position only: bytes=x-
3. With suffix length: bytes=-y

Multiple ranges in a single request is not supported as we need to multipart encoding..
Review URL: http://codereview.chromium.org/92149

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14799 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 1 deletions

diff --git a/net/url_request/url_request_file_job.h b/net/url_request/url_request_file_job.h
index 94b65c4..3091d2a 100644
--- a/net/url_request/url_request_file_job.h
+++ b/net/url_request/url_request_file_job.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.
 
@@ -11,6 +11,7 @@
 #include "base/file_util.h"
 #include "net/base/completion_callback.h"
 #include "net/base/file_stream.h"
+#include "net/http/http_byte_range.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job.h"
 
@@ -26,6 +27,7 @@ class URLRequestFileJob : public URLRequestJob {
   virtual bool IsRedirectResponse(GURL* location, int* http_status_code);
   virtual bool GetMimeType(std::string* mime_type) const;
   virtual void GetResponseInfo(net::HttpResponseInfo* info);
+  virtual void SetExtraRequestHeaders(const std::string& headers);
 
   static URLRequest::ProtocolFactory Factory;
 
@@ -41,6 +43,9 @@ class URLRequestFileJob : public URLRequestJob {
   net::FileStream stream_;
   bool is_directory_;
 
+  net::HttpByteRange byte_range_;
+  int64 remaining_bytes_;
+
 #if defined(OS_WIN)
   class AsyncResolver;
   friend class AsyncResolver;