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// 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.
#include "webkit/glue/resource_request_body.h"
#include "base/logging.h"
#include "net/base/upload_bytes_element_reader.h"
#include "net/base/upload_data_stream.h"
#include "net/base/upload_file_element_reader.h"
#include "webkit/blob/blob_storage_controller.h"
#include "webkit/fileapi/upload_file_system_file_element_reader.h"
using webkit_blob::BlobData;
using webkit_blob::BlobStorageController;
namespace webkit_glue {
namespace {
// A subclass of net::UploadBytesElementReader which owns ResourceRequestBody.
class BytesElementReader : public net::UploadBytesElementReader {
public:
BytesElementReader(ResourceRequestBody* resource_request_body,
const ResourceRequestBody::Element& element)
: net::UploadBytesElementReader(element.bytes(), element.length()),
resource_request_body_(resource_request_body) {
DCHECK_EQ(ResourceRequestBody::Element::TYPE_BYTES, element.type());
}
virtual ~BytesElementReader() {}
private:
scoped_refptr<ResourceRequestBody> resource_request_body_;
DISALLOW_COPY_AND_ASSIGN(BytesElementReader);
};
// A subclass of net::UploadFileElementReader which owns ResourceRequestBody.
// This class is necessary to ensure the BlobData and any attached shareable
// files survive until upload completion.
class FileElementReader : public net::UploadFileElementReader {
public:
FileElementReader(ResourceRequestBody* resource_request_body,
base::TaskRunner* task_runner,
const ResourceRequestBody::Element& element)
: net::UploadFileElementReader(task_runner,
element.path(),
element.offset(),
element.length(),
element.expected_modification_time()),
resource_request_body_(resource_request_body) {
DCHECK_EQ(ResourceRequestBody::Element::TYPE_FILE, element.type());
}
virtual ~FileElementReader() {}
private:
scoped_refptr<ResourceRequestBody> resource_request_body_;
DISALLOW_COPY_AND_ASSIGN(FileElementReader);
};
} // namespace
ResourceRequestBody::ResourceRequestBody() : identifier_(0) {}
void ResourceRequestBody::AppendBytes(const char* bytes, int bytes_len) {
if (bytes_len > 0) {
elements_.push_back(Element());
elements_.back().SetToBytes(bytes, bytes_len);
}
}
void ResourceRequestBody::AppendFileRange(
const base::FilePath& file_path,
uint64 offset, uint64 length,
const base::Time& expected_modification_time) {
elements_.push_back(Element());
elements_.back().SetToFilePathRange(file_path, offset, length,
expected_modification_time);
}
void ResourceRequestBody::AppendBlob(const GURL& blob_url) {
elements_.push_back(Element());
elements_.back().SetToBlobUrl(blob_url);
}
void ResourceRequestBody::AppendFileSystemFileRange(
const GURL& url, uint64 offset, uint64 length,
const base::Time& expected_modification_time) {
elements_.push_back(Element());
elements_.back().SetToFileSystemUrlRange(url, offset, length,
expected_modification_time);
}
net::UploadDataStream*
ResourceRequestBody::ResolveElementsAndCreateUploadDataStream(
BlobStorageController* blob_controller,
fileapi::FileSystemContext* file_system_context,
base::TaskRunner* file_task_runner) {
// Resolve all blob elements.
std::vector<const Element*> resolved_elements;
for (size_t i = 0; i < elements_.size(); ++i) {
const Element& element = elements_[i];
if (element.type() == Element::TYPE_BLOB) {
ResolveBlobReference(blob_controller, element.url(), &resolved_elements);
} else {
// No need to resolve, just append the element.
resolved_elements.push_back(&element);
}
}
ScopedVector<net::UploadElementReader> element_readers;
for (size_t i = 0; i < resolved_elements.size(); ++i) {
const Element& element = *resolved_elements[i];
switch (element.type()) {
case Element::TYPE_BYTES:
element_readers.push_back(new BytesElementReader(this, element));
break;
case Element::TYPE_FILE:
element_readers.push_back(
new FileElementReader(this, file_task_runner, element));
break;
case Element::TYPE_FILE_FILESYSTEM:
element_readers.push_back(
new fileapi::UploadFileSystemFileElementReader(
file_system_context,
element.url(),
element.offset(),
element.length(),
element.expected_modification_time()));
break;
case Element::TYPE_BLOB:
// Blob elements should be resolved beforehand.
NOTREACHED();
break;
case Element::TYPE_UNKNOWN:
NOTREACHED();
break;
}
}
return new net::UploadDataStream(&element_readers, identifier_);
}
ResourceRequestBody::~ResourceRequestBody() {}
void ResourceRequestBody::ResolveBlobReference(
webkit_blob::BlobStorageController* blob_controller,
const GURL& blob_url,
std::vector<const Element*>* resolved_elements) {
DCHECK(blob_controller);
BlobData* blob_data = blob_controller->GetBlobDataFromUrl(blob_url);
DCHECK(blob_data);
if (!blob_data)
return;
// If there is no element in the referred blob data, just return.
if (blob_data->items().empty())
return;
// Ensure the blob and any attached shareable files survive until
// upload completion.
SetUserData(blob_data, new base::UserDataAdapter<BlobData>(blob_data));
// Append the elements in the referred blob data.
for (size_t i = 0; i < blob_data->items().size(); ++i) {
const BlobData::Item& item = blob_data->items().at(i);
DCHECK_NE(BlobData::Item::TYPE_BLOB, item.type());
resolved_elements->push_back(&item);
}
}
} // namespace webkit_glue
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