storage/browser/fileapi/file_writer_delegate.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef STORAGE_BROWSER_FILEAPI_FILE_WRITER_DELEGATE_H_
   6 #define STORAGE_BROWSER_FILEAPI_FILE_WRITER_DELEGATE_H_
   7
   8 #include "base/files/file.h"
   9 #include "base/files/file_path.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/time/time.h"
  13 #include "net/base/file_stream.h"
  14 #include "net/base/io_buffer.h"
  15 #include "net/url_request/url_request.h"
  16 #include "storage/browser/storage_browser_export.h"
  17
  18 namespace storage {
  19
  20 class FileStreamWriter;
  21 enum class FlushPolicy;
  22
  23 class STORAGE_EXPORT_PRIVATE FileWriterDelegate
  24     : public net::URLRequest::Delegate {
  25  public:
  26   enum WriteProgressStatus {
  27     SUCCESS_IO_PENDING,
  28     SUCCESS_COMPLETED,
  29     ERROR_WRITE_STARTED,
  30     ERROR_WRITE_NOT_STARTED,
  31   };
  32
  33   typedef base::Callback<void(base::File::Error result,
  34                               int64 bytes,
  35                               WriteProgressStatus write_status)>
  36       DelegateWriteCallback;
  37
  38   FileWriterDelegate(scoped_ptr<FileStreamWriter> file_writer,
  39                      FlushPolicy flush_policy);
  40   ~FileWriterDelegate() override;
  41
  42   void Start(scoped_ptr<net::URLRequest> request,
  43              const DelegateWriteCallback& write_callback);
  44
  45   // Cancels the current write operation.  This will synchronously or
  46   // asynchronously call the given write callback (which may result in
  47   // deleting this).
  48   void Cancel();
  49
  50   void OnReceivedRedirect(net::URLRequest* request,
  51                           const net::RedirectInfo& redirect_info,
  52                           bool* defer_redirect) override;
  53   void OnAuthRequired(net::URLRequest* request,
  54                       net::AuthChallengeInfo* auth_info) override;
  55   void OnCertificateRequested(
  56       net::URLRequest* request,
  57       net::SSLCertRequestInfo* cert_request_info) override;
  58   void OnSSLCertificateError(net::URLRequest* request,
  59                              const net::SSLInfo& ssl_info,
  60                              bool fatal) override;
  61   void OnResponseStarted(net::URLRequest* request) override;
  62   void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
  63
  64  private:
  65   void OnGetFileInfoAndStartRequest(
  66       scoped_ptr<net::URLRequest> request,
  67       base::File::Error error,
  68       const base::File::Info& file_info);
  69   void Read();
  70   void OnDataReceived(int bytes_read);
  71   void Write();
  72   void OnDataWritten(int write_response);
  73   void OnError(base::File::Error error);
  74   void OnProgress(int bytes_read, bool done);
  75   void OnWriteCancelled(int status);
  76   void MaybeFlushForCompletion(base::File::Error error,
  77                                int bytes_written,
  78                                WriteProgressStatus progress_status);
  79   void OnFlushed(base::File::Error error,
  80                  int bytes_written,
  81                  WriteProgressStatus progress_status,
  82                  int flush_error);
  83
  84   WriteProgressStatus GetCompletionStatusOnError() const;
  85
  86   DelegateWriteCallback write_callback_;
  87   scoped_ptr<FileStreamWriter> file_stream_writer_;
  88   base::Time last_progress_event_time_;
  89   bool writing_started_;
  90   FlushPolicy flush_policy_;
  91   int bytes_written_backlog_;
  92   int bytes_written_;
  93   int bytes_read_;
  94   scoped_refptr<net::IOBufferWithSize> io_buffer_;
  95   scoped_refptr<net::DrainableIOBuffer> cursor_;
  96   scoped_ptr<net::URLRequest> request_;
  97
  98   base::WeakPtrFactory<FileWriterDelegate> weak_factory_;
  99
 100   DISALLOW_COPY_AND_ASSIGN(FileWriterDelegate);
 101 };
 102
 103 }  // namespace storage
 104
 105 #endif  // STORAGE_BROWSER_FILEAPI_FILE_WRITER_DELEGATE_H_