| // Copyright 2014 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. |
| |
| #include "content/browser/loader/stream_writer.h" |
| |
| #include "base/guid.h" |
| #include "content/browser/streams/stream.h" |
| #include "content/browser/streams/stream_registry.h" |
| #include "content/public/browser/resource_controller.h" |
| #include "net/base/io_buffer.h" |
| #include "url/gurl.h" |
| #include "url/url_constants.h" |
| |
| namespace content { |
| |
| StreamWriter::StreamWriter() : controller_(nullptr), immediate_mode_(false) { |
| } |
| |
| StreamWriter::~StreamWriter() { |
| if (stream_.get()) |
| Finalize(); |
| } |
| |
| void StreamWriter::InitializeStream(StreamRegistry* registry, |
| const GURL& origin) { |
| DCHECK(!stream_.get()); |
| |
| // TODO(tyoshino): Find a way to share this with the blob URL creation in |
| // WebKit. |
| GURL url(std::string(url::kBlobScheme) + ":" + origin.spec() + |
| base::GenerateGUID()); |
| stream_ = new Stream(registry, this, url); |
| } |
| |
| void StreamWriter::OnWillRead(scoped_refptr<net::IOBuffer>* buf, |
| int* buf_size, |
| int min_size) { |
| static const int kReadBufSize = 32768; |
| |
| DCHECK(buf); |
| DCHECK(buf_size); |
| DCHECK_LE(min_size, kReadBufSize); |
| if (!read_buffer_.get()) |
| read_buffer_ = new net::IOBuffer(kReadBufSize); |
| *buf = read_buffer_.get(); |
| *buf_size = kReadBufSize; |
| } |
| |
| void StreamWriter::OnReadCompleted(int bytes_read, bool* defer) { |
| if (!bytes_read) |
| return; |
| |
| // We have more data to read. |
| DCHECK(read_buffer_.get()); |
| |
| // Release the ownership of the buffer, and store a reference |
| // to it. A new one will be allocated in OnWillRead(). |
| scoped_refptr<net::IOBuffer> buffer; |
| read_buffer_.swap(buffer); |
| stream_->AddData(buffer, bytes_read); |
| |
| if (immediate_mode_) |
| stream_->Flush(); |
| |
| if (!stream_->can_add_data()) |
| *defer = true; |
| } |
| |
| void StreamWriter::Finalize() { |
| DCHECK(stream_.get()); |
| stream_->Finalize(); |
| stream_->RemoveWriteObserver(this); |
| stream_ = nullptr; |
| } |
| |
| void StreamWriter::OnSpaceAvailable(Stream* stream) { |
| controller_->Resume(); |
| } |
| |
| void StreamWriter::OnClose(Stream* stream) { |
| controller_->Cancel(); |
| } |
| |
| } // namespace content |