Support handling blob URL and resolve blob references in upload data....

webkit/blob/blob_url_request_job.h

+// Copyright (c) 20010 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_BLOB_BLOB_URL_REQUEST_JOB_H_
+#define WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
+
+#include "base/ref_counted.h"
+#include "base/scoped_callback_factory.h"
+#include "base/scoped_ptr.h"
+#include "net/base/completion_callback.h"
+#include "net/base/file_stream.h"
+#include "net/http/http_byte_range.h"
+#include "net/url_request/url_request_job.h"
+#include "webkit/blob/blob_data.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace file_util {
+struct FileInfo;
+}
+
+namespace webkit_blob {
+
+// A request job that handles reading blob URLs.
+class BlobURLRequestJob : public URLRequestJob {
+ public:
+  BlobURLRequestJob(URLRequest* request,
+                    BlobData* blob_data,
+                    base::MessageLoopProxy* resolving_message_loop_proxy);
+  virtual ~BlobURLRequestJob();
+
+  // URLRequestJob methods.
+  virtual void Start();
+  virtual void Kill();
+  virtual bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read);
+  virtual bool GetMimeType(std::string* mime_type) const;
+  virtual void GetResponseInfo(net::HttpResponseInfo* info);
+  virtual int GetResponseCode() const;
+  virtual void SetExtraRequestHeaders(const net::HttpRequestHeaders& headers);
+
+ private:
+  void ResolveFile(const FilePath& file_path);
+  void CountSize();
+  void Seek(int64 offset);
+  void AdvanceItem();
+  void AdvanceBytesRead(int result);
+  bool ReadLoop(int* bytes_read);
+  bool ReadItem();
+  bool ReadBytes(const BlobData::Item& item, int bytes_to_read);
+  bool ReadFile(const BlobData::Item& item, int bytes_to_read);
+  void HeadersCompleted(int status_code, const std::string& status_txt);
+  int ReadCompleted();
+  void NotifySuccess();
+  void NotifyFailure(int);
+
+  void DidResolve(bool exists, const file_util::FileInfo& file_info);
+  void DidRead(int result);
+
+  base::ScopedCallbackFactory<BlobURLRequestJob> callback_factory_;
+  scoped_refptr<BlobData> blob_data_;
+  scoped_refptr<base::MessageLoopProxy> file_thread_proxy_;
+  net::CompletionCallbackImpl<BlobURLRequestJob> io_callback_;
+  std::vector<int64> item_length_list_;
+  net::FileStream stream_;
+  size_t item_index_;
+  int64 total_size_;
+  int64 current_item_offset_;
+  int64 remaining_bytes_;
+  scoped_refptr<net::IOBuffer> read_buf_;
+  int read_buf_offset_;
+  int read_buf_size_;
+  int read_buf_remaining_bytes_;
+  bool error_;
+  bool headers_set_;
+  bool byte_range_set_;
+  net::HttpByteRange byte_range_;
+  scoped_ptr<net::HttpResponseInfo> response_info_;
+
+  DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob);
+};
+
+}  // namespace webkit_blob
+
+#endif  // WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_