Move all remaining appcache-related code to content namespace

webkit/browser/appcache/appcache_response.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 WEBKIT_BROWSER_APPCACHE_APPCACHE_RESPONSE_H_
-#define WEBKIT_BROWSER_APPCACHE_APPCACHE_RESPONSE_H_
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "net/base/completion_callback.h"
-#include "net/http/http_response_info.h"
-#include "url/gurl.h"
-#include "webkit/browser/webkit_storage_browser_export.h"
-#include "webkit/common/appcache/appcache_interfaces.h"
-
-namespace net {
-class IOBuffer;
-}
-
-namespace content {
-class MockAppCacheStorage;
-}
-
-namespace appcache {
-
-class AppCacheStorage;
-
-static const int kUnkownResponseDataSize = -1;
-
-// Response info for a particular response id. Instances are tracked in
-// the working set.
-class WEBKIT_STORAGE_BROWSER_EXPORT AppCacheResponseInfo
-    : public base::RefCounted<AppCacheResponseInfo> {
- public:
-  // AppCacheResponseInfo takes ownership of the http_info.
-  AppCacheResponseInfo(AppCacheStorage* storage, const GURL& manifest_url,
-                       int64 response_id, net::HttpResponseInfo* http_info,
-                       int64 response_data_size);
-
-  const GURL& manifest_url() const { return manifest_url_; }
-  int64 response_id() const { return response_id_; }
-  const net::HttpResponseInfo* http_response_info() const {
-    return http_response_info_.get();
-  }
-  int64 response_data_size() const { return response_data_size_; }
-
- private:
-  friend class base::RefCounted<AppCacheResponseInfo>;
-  virtual ~AppCacheResponseInfo();
-
-  const GURL manifest_url_;
-  const int64 response_id_;
-  const scoped_ptr<net::HttpResponseInfo> http_response_info_;
-  const int64 response_data_size_;
-  AppCacheStorage* storage_;
-};
-
-// A refcounted wrapper for HttpResponseInfo so we can apply the
-// refcounting semantics used with IOBuffer with these structures too.
-struct WEBKIT_STORAGE_BROWSER_EXPORT HttpResponseInfoIOBuffer
-    : public base::RefCountedThreadSafe<HttpResponseInfoIOBuffer> {
-  scoped_ptr<net::HttpResponseInfo> http_info;
-  int response_data_size;
-
-  HttpResponseInfoIOBuffer();
-  explicit HttpResponseInfoIOBuffer(net::HttpResponseInfo* info);
-
- protected:
-  friend class base::RefCountedThreadSafe<HttpResponseInfoIOBuffer>;
-  virtual ~HttpResponseInfoIOBuffer();
-};
-
-// Low level storage API used by the response reader and writer.
-class WEBKIT_STORAGE_BROWSER_EXPORT AppCacheDiskCacheInterface {
- public:
-  class Entry {
-   public:
-    virtual int Read(int index, int64 offset, net::IOBuffer* buf, int buf_len,
-                     const net::CompletionCallback& callback) = 0;
-    virtual int Write(int index, int64 offset, net::IOBuffer* buf, int buf_len,
-                      const net::CompletionCallback& callback) = 0;
-    virtual int64 GetSize(int index) = 0;
-    virtual void Close() = 0;
-   protected:
-    virtual ~Entry() {}
-  };
-
-  virtual int CreateEntry(int64 key, Entry** entry,
-                          const net::CompletionCallback& callback) = 0;
-  virtual int OpenEntry(int64 key, Entry** entry,
-                        const net::CompletionCallback& callback) = 0;
-  virtual int DoomEntry(int64 key, const net::CompletionCallback& callback) = 0;
-
- protected:
-  friend class base::RefCounted<AppCacheDiskCacheInterface>;
-  virtual ~AppCacheDiskCacheInterface() {}
-};
-
-// Common base class for response reader and writer.
-class WEBKIT_STORAGE_BROWSER_EXPORT AppCacheResponseIO {
- public:
-  virtual ~AppCacheResponseIO();
-  int64 response_id() const { return response_id_; }
-
- protected:
-  AppCacheResponseIO(int64 response_id,
-                     int64 group_id,
-                     AppCacheDiskCacheInterface* disk_cache);
-
-  virtual void OnIOComplete(int result) = 0;
-
-  bool IsIOPending() { return !callback_.is_null(); }
-  void ScheduleIOCompletionCallback(int result);
-  void InvokeUserCompletionCallback(int result);
-  void ReadRaw(int index, int offset, net::IOBuffer* buf, int buf_len);
-  void WriteRaw(int index, int offset, net::IOBuffer* buf, int buf_len);
-
-  const int64 response_id_;
-  const int64 group_id_;
-  AppCacheDiskCacheInterface* disk_cache_;
-  AppCacheDiskCacheInterface::Entry* entry_;
-  scoped_refptr<HttpResponseInfoIOBuffer> info_buffer_;
-  scoped_refptr<net::IOBuffer> buffer_;
-  int buffer_len_;
-  net::CompletionCallback callback_;
-  base::WeakPtrFactory<AppCacheResponseIO> weak_factory_;
-
- private:
-  void OnRawIOComplete(int result);
-};
-
-// Reads existing response data from storage. If the object is deleted
-// and there is a read in progress, the implementation will return
-// immediately but will take care of any side effect of cancelling the
-// operation.  In other words, instances are safe to delete at will.
-class WEBKIT_STORAGE_BROWSER_EXPORT AppCacheResponseReader
-    : public AppCacheResponseIO {
- public:
-  virtual ~AppCacheResponseReader();
-
-  // Reads http info from storage. Always returns the result of the read
-  // asynchronously through the 'callback'. Returns the number of bytes read
-  // or a net:: error code. Guaranteed to not perform partial reads of
-  // the info data. The reader acquires a reference to the 'info_buf' until
-  // completion at which time the callback is invoked with either a negative
-  // error code or the number of bytes read. The 'info_buf' argument should
-  // contain a NULL http_info when ReadInfo is called. The 'callback' is a
-  // required parameter.
-  // Should only be called where there is no Read operation in progress.
-  // (virtual for testing)
-  virtual void ReadInfo(HttpResponseInfoIOBuffer* info_buf,
-                        const net::CompletionCallback& callback);
-
-  // Reads data from storage. Always returns the result of the read
-  // asynchronously through the 'callback'. Returns the number of bytes read
-  // or a net:: error code. EOF is indicated with a return value of zero.
-  // The reader acquires a reference to the provided 'buf' until completion
-  // at which time the callback is invoked with either a negative error code
-  // or the number of bytes read. The 'callback' is a required parameter.
-  // Should only be called where there is no Read operation in progress.
-  // (virtual for testing)
-  virtual void ReadData(net::IOBuffer* buf, int buf_len,
-                        const net::CompletionCallback& callback);
-
-  // Returns true if there is a read operation, for data or info, pending.
-  bool IsReadPending() { return IsIOPending(); }
-
-  // Used to support range requests. If not called, the reader will
-  // read the entire response body. If called, this must be called prior
-  // to the first call to the ReadData method.
-  void SetReadRange(int offset, int length);
-
- protected:
-  friend class AppCacheStorageImpl;
-  friend class content::MockAppCacheStorage;
-
-  // Should only be constructed by the storage class and derivatives.
-  AppCacheResponseReader(int64 response_id,
-                         int64 group_id,
-                         AppCacheDiskCacheInterface* disk_cache);
-
-  virtual void OnIOComplete(int result) OVERRIDE;
-  void ContinueReadInfo();
-  void ContinueReadData();
-  void OpenEntryIfNeededAndContinue();
-  void OnOpenEntryComplete(AppCacheDiskCacheInterface::Entry** entry, int rv);
-
-  int range_offset_;
-  int range_length_;
-  int read_position_;
-  net::CompletionCallback open_callback_;
-  base::WeakPtrFactory<AppCacheResponseReader> weak_factory_;
-};
-
-// Writes new response data to storage. If the object is deleted
-// and there is a write in progress, the implementation will return
-// immediately but will take care of any side effect of cancelling the
-// operation. In other words, instances are safe to delete at will.
-class WEBKIT_STORAGE_BROWSER_EXPORT AppCacheResponseWriter
-    : public AppCacheResponseIO {
- public:
-  virtual ~AppCacheResponseWriter();
-
-  // Writes the http info to storage. Always returns the result of the write
-  // asynchronously through the 'callback'. Returns the number of bytes written
-  // or a net:: error code. The writer acquires a reference to the 'info_buf'
-  // until completion at which time the callback is invoked with either a
-  // negative error code or the number of bytes written. The 'callback' is a
-  // required parameter. The contents of 'info_buf' are not modified.
-  // Should only be called where there is no Write operation in progress.
-  void WriteInfo(HttpResponseInfoIOBuffer* info_buf,
-                 const net::CompletionCallback& callback);
-
-  // Writes data to storage. Always returns the result of the write
-  // asynchronously through the 'callback'. Returns the number of bytes written
-  // or a net:: error code. Guaranteed to not perform partial writes.
-  // The writer acquires a reference to the provided 'buf' until completion at
-  // which time the callback is invoked with either a negative error code or
-  // the number of bytes written. The 'callback' is a required parameter.
-  // The contents of 'buf' are not modified.
-  // Should only be called where there is no Write operation in progress.
-  void WriteData(net::IOBuffer* buf, int buf_len,
-                 const net::CompletionCallback& callback);
-
-  // Returns true if there is a write pending.
-  bool IsWritePending() { return IsIOPending(); }
-
-  // Returns the amount written, info and data.
-  int64 amount_written() { return info_size_ + write_position_; }
-
- protected:
-  // Should only be constructed by the storage class and derivatives.
-  AppCacheResponseWriter(int64 response_id,
-                         int64 group_id,
-                         AppCacheDiskCacheInterface* disk_cache);
-
- private:
-  friend class AppCacheStorageImpl;
-  friend class content::MockAppCacheStorage;
-
-  enum CreationPhase {
-    NO_ATTEMPT,
-    INITIAL_ATTEMPT,
-    DOOM_EXISTING,
-    SECOND_ATTEMPT
-  };
-
-  virtual void OnIOComplete(int result) OVERRIDE;
-  void ContinueWriteInfo();
-  void ContinueWriteData();
-  void CreateEntryIfNeededAndContinue();
-  void OnCreateEntryComplete(AppCacheDiskCacheInterface::Entry** entry, int rv);
-
-  int info_size_;
-  int write_position_;
-  int write_amount_;
-  CreationPhase creation_phase_;
-  net::CompletionCallback create_callback_;
-  base::WeakPtrFactory<AppCacheResponseWriter> weak_factory_;
-};
-
-}  // namespace appcache
-
-#endif  // WEBKIT_BROWSER_APPCACHE_APPCACHE_RESPONSE_H_