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91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_BASE_ELEMENTS_UPLOAD_DATA_STREAM_H_
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#define NET_BASE_ELEMENTS_UPLOAD_DATA_STREAM_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <memory>
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#include <vector>
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#include "base/macros.h"
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#include "base/memory/ref_counted.h"
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#include "base/memory/weak_ptr.h"
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#include "net/base/net_export.h"
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#include "net/base/upload_data_stream.h"
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namespace net {
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class DrainableIOBuffer;
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class IOBuffer;
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class UploadElementReader;
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// A non-chunked UploadDataStream consisting of one or more UploadElements.
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class NET_EXPORT ElementsUploadDataStream : public UploadDataStream {
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public:
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ElementsUploadDataStream(
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std::vector<std::unique_ptr<UploadElementReader>> element_readers,
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int64_t identifier);
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~ElementsUploadDataStream() override;
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// Creates an ElementsUploadDataStream with a single reader. Returns a
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// std::unique_ptr<UploadDataStream> for ease of use.
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static std::unique_ptr<UploadDataStream> CreateWithReader(
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std::unique_ptr<UploadElementReader> reader,
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int64_t identifier);
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private:
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// UploadDataStream implementation.
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bool IsInMemory() const override;
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const std::vector<std::unique_ptr<UploadElementReader>>* GetElementReaders()
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const override;
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int InitInternal(const NetLogWithSource& net_log) override;
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int ReadInternal(IOBuffer* buf, int buf_len) override;
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void ResetInternal() override;
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// Runs Init() for all element readers.
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// This method is used to implement InitInternal().
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int InitElements(size_t start_index);
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// Called when the |index| element finishes initialization. If it succeeded,
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// continues with the |index + 1| element. Calls OnInitCompleted on error or
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// when all elements have been initialized.
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void OnInitElementCompleted(size_t index, int result);
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// Reads data from the element readers.
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// This method is used to implement Read().
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int ReadElements(const scoped_refptr<DrainableIOBuffer>& buf);
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// Resumes pending read and calls OnReadCompleted with a result when
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// necessary.
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void OnReadElementCompleted(const scoped_refptr<DrainableIOBuffer>& buf,
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int result);
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// Processes result of UploadElementReader::Read(). If |result| indicates
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// success, updates |buf|'s offset. Otherwise, sets |read_failed_| to true.
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void ProcessReadResult(const scoped_refptr<DrainableIOBuffer>& buf,
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int result);
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std::vector<std::unique_ptr<UploadElementReader>> element_readers_;
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// Index of the current upload element (i.e. the element currently being
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// read). The index is used as a cursor to iterate over elements in
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// |upload_data_|.
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size_t element_index_;
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// Set to actual error if read fails, otherwise set to net::OK.
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int read_error_;
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base::WeakPtrFactory<ElementsUploadDataStream> weak_ptr_factory_;
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DISALLOW_COPY_AND_ASSIGN(ElementsUploadDataStream);
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};
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} // namespace net
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#endif // NET_BASE_ELEMENTS_UPLOAD_DATA_STREAM_H_
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