Remove //net (except for Android test stuff) and sdch

net/base/upload_data_stream.h

-// Copyright (c) 2012 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 NET_BASE_UPLOAD_DATA_STREAM_H_
-#define NET_BASE_UPLOAD_DATA_STREAM_H_
-
-#include "base/basictypes.h"
-#include "base/macros.h"
-#include "base/memory/scoped_vector.h"
-#include "net/base/completion_callback.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-class DrainableIOBuffer;
-class IOBuffer;
-class UploadElementReader;
-
-// A class for retrieving all data to be sent as a request body. Supports both
-// chunked and non-chunked uploads.
-class NET_EXPORT UploadDataStream {
- public:
-  // |identifier| identifies a particular upload instance, which is used by the
-  // cache to formulate a cache key. This value should be unique across browser
-  // sessions. A value of 0 is used to indicate an unspecified identifier.
-  UploadDataStream(bool is_chunked, int64 identifier);
-
-  virtual ~UploadDataStream();
-
-  // Initializes the stream. This function must be called before calling any
-  // other method. It is not valid to call any method (other than the
-  // destructor) if Init() fails. This method can be called multiple times.
-  // Calling this method after an Init() success results in resetting the
-  // state (i.e. the stream is rewound).
-  //
-  // Does the initialization synchronously and returns the result if possible,
-  // otherwise returns ERR_IO_PENDING and runs the callback with the result.
-  //
-  // Returns OK on success. Returns ERR_UPLOAD_FILE_CHANGED if the expected
-  // file modification time is set (usually not set, but set for sliced
-  // files) and the target file is changed.
-  int Init(const CompletionCallback& callback);
-
-  // When possible, reads up to |buf_len| bytes synchronously from the upload
-  // data stream to |buf| and returns the number of bytes read; otherwise,
-  // returns ERR_IO_PENDING and calls |callback| with the number of bytes read.
-  // Partial reads are allowed. Zero is returned on a call to Read when there
-  // are no remaining bytes in the stream, and IsEof() will return true
-  // hereafter.
-  //
-  // If there's less data to read than we initially observed (i.e. the actual
-  // upload data is smaller than size()), zeros are padded to ensure that
-  // size() bytes can be read, which can happen for TYPE_FILE payloads.
-  //
-  // Reads are currently not allowed to fail - they must either return
-  // a value >= 0 or ERR_IO_PENDING, and call OnReadCompleted with a
-  // value >= 0.
-  // TODO(mmenke):  Investigate letting reads fail.
-  int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
-
-  // Returns the total size of the data stream and the current position.
-  // When the data is chunked, always returns zero. Must always return the same
-  // value after each call to Initialize().
-  uint64 size() const { return total_size_; }
-  uint64 position() const { return current_position_; }
-
-  // See constructor for description.
-  int64 identifier() const { return identifier_; }
-
-  bool is_chunked() const { return is_chunked_; }
-
-  // Returns true if all data has been consumed from this upload data
-  // stream. For chunked uploads, returns false until the first read attempt.
-  // This makes some state machines a little simpler.
-  bool IsEOF() const;
-
-  // Cancels all pending callbacks, and resets state. Any IOBuffer currently
-  // being read to is not safe for future use, as it may be in use on another
-  // thread.
-  void Reset();
-
-  // Returns true if the upload data in the stream is entirely in memory, and
-  // all read requests will succeed synchronously. Expected to return false for
-  // chunked requests.
-  virtual bool IsInMemory() const;
-
-  // Returns a list of element readers owned by |this|, if it has any.
-  virtual const ScopedVector<UploadElementReader>*
-      GetElementReaders() const;
-
- protected:
-  // Must be called by subclasses when InitInternal and ReadInternal complete
-  // asynchronously.
-  void OnInitCompleted(int result);
-  void OnReadCompleted(int result);
-
-  // Must be called before InitInternal completes, for non-chunked uploads.
-  // Must not be called for chunked uploads.
-  void SetSize(uint64 size);
-
-  // Must be called for chunked uploads before the final ReadInternal call
-  // completes. Must not be called for non-chunked uploads.
-  void SetIsFinalChunk();
-
- private:
-  // See Init(). If it returns ERR_IO_PENDING, OnInitCompleted must be called
-  // once it completes. If the upload is not chunked, SetSize must be called
-  // before it completes.
-  virtual int InitInternal() = 0;
-
-  // See Read(). For chunked uploads, must call SetIsFinalChunk if this is the
-  // final chunk. For non-chunked uploads, the UploadDataStream determins which
-  // read is the last based on size. Must read 1 or more bytes on every call,
-  // though the final chunk may be 0 bytes, for chunked requests. If it returns
-  // ERR_IO_PENDING, OnInitCompleted must be called once it completes. Must not
-  // return any error, other than ERR_IO_PENDING.
-  virtual int ReadInternal(IOBuffer* buf, int buf_len) = 0;
-
-  // Resets state and cancels any pending callbacks. Guaranteed to be called
-  // before all but the first call to InitInternal.
-  virtual void ResetInternal() = 0;
-
-  uint64 total_size_;
-  uint64 current_position_;
-
-  const int64 identifier_;
-
-  const bool is_chunked_;
-
-  // True if the initialization was successful.
-  bool initialized_successfully_;
-
-  bool is_eof_;
-
-  CompletionCallback callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(UploadDataStream);
-};
-
-}  // namespace net
-
-#endif  // NET_BASE_UPLOAD_DATA_STREAM_H_