Index: storage/browser/blob/upload_blob_element_reader.h |
diff --git a/storage/browser/blob/upload_blob_element_reader.h b/storage/browser/blob/upload_blob_element_reader.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..72b7244a486c0d7c02322caa442cc45916424cd3 |
--- /dev/null |
+++ b/storage/browser/blob/upload_blob_element_reader.h |
@@ -0,0 +1,54 @@ |
+// Copyright 2015 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. |
+ |
+#ifndef STORAGE_BROWSER_BLOB_UPLOAD_BLOB_ELEMENT_READER_H_ |
+#define STORAGE_BROWSER_BLOB_UPLOAD_BLOB_ELEMENT_READER_H_ |
+ |
+#include "base/macros.h" |
+#include "base/memory/scoped_ptr.h" |
+#include "net/base/completion_callback.h" |
+#include "net/base/upload_element_reader.h" |
+#include "storage/browser/storage_browser_export.h" |
+ |
+namespace net { |
+class IOBuffer; |
+} |
+ |
+namespace storage { |
+class BlobDataHandle; |
+class BlobReader; |
+ |
+// This class is a wrapper around the BlobReader to make it conform |
+// to the net::UploadElementReader interface, and it also holds around the |
+// handle to the blob so it stays in memory while we read it. |
+class STORAGE_EXPORT UploadBlobElementReader |
+ : NON_EXPORTED_BASE(public net::UploadElementReader) { |
+ public: |
+ UploadBlobElementReader(scoped_ptr<BlobReader> reader, |
+ scoped_ptr<BlobDataHandle> handle); |
+ ~UploadBlobElementReader() override; |
+ |
+ int Init(const net::CompletionCallback& callback) override; |
+ |
+ uint64_t GetContentLength() const override; |
+ |
+ uint64_t BytesRemaining() const override; |
+ |
+ bool IsInMemory() const override; |
+ |
+ int Read(net::IOBuffer* buf, |
+ int buf_length, |
+ const net::CompletionCallback& callback) override; |
+ |
+ const std::string& uuid() const; |
+ |
+ private: |
+ scoped_ptr<BlobReader> reader_; |
+ scoped_ptr<BlobDataHandle> handle_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(UploadBlobElementReader); |
+}; |
+ |
+} // namespace storage |
+#endif // STORAGE_BROWSER_BLOB_UPLOAD_BLOB_ELEMENT_READER_H_ |