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// Copyright (c) 2009 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 "chrome/browser/net/metadata_url_request.h"
#include "base/message_loop.h"
#include "build/build_config.h"
#include "googleurl/src/url_util.h"
#include "net/base/io_buffer.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_job.h"
namespace {
const char kMetadataScheme[] = "metadata";
class MetadataRequestHandler : public URLRequestJob {
public:
explicit MetadataRequestHandler(URLRequest* request);
~MetadataRequestHandler();
static URLRequestJob* Factory(URLRequest* request, const std::string& scheme);
// URLRequestJob implementation.
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;
private:
void StartAsync();
int data_offset_;
DISALLOW_COPY_AND_ASSIGN(MetadataRequestHandler);
};
MetadataRequestHandler::MetadataRequestHandler(URLRequest* request)
: URLRequestJob(request),
data_offset_(0) {
}
MetadataRequestHandler::~MetadataRequestHandler() {
}
URLRequestJob* MetadataRequestHandler::Factory(URLRequest* request,
const std::string& scheme) {
return new MetadataRequestHandler(request);
}
void MetadataRequestHandler::Start() {
// Start reading asynchronously so that all error reporting and data
// callbacks happen as they would for network requests.
MessageLoop::current()->PostTask(FROM_HERE, NewRunnableMethod(
this, &MetadataRequestHandler::StartAsync));
}
void MetadataRequestHandler::Kill() {
}
bool MetadataRequestHandler::ReadRawData(net::IOBuffer* buf, int buf_size,
int *bytes_read) {
std::string fake_result = "{ \"foo\": 3.14 }";
int remaining = static_cast<int>(fake_result.size()) - data_offset_;
if (buf_size > remaining)
buf_size = remaining;
if (buf_size > 0) {
memcpy(buf->data(), &fake_result[data_offset_], buf_size);
data_offset_ += buf_size;
}
*bytes_read = buf_size;
return true;
}
bool MetadataRequestHandler::GetMimeType(std::string* mime_type) const {
*mime_type = "application/json";
return true;
}
void MetadataRequestHandler::StartAsync() {
NotifyHeadersComplete();
}
} // namespace
void RegisterMetadataURLRequestHandler() {
// This is currently unfinished. It will eventually provide metadata
// but currently just returns a dummy stub string.
#if defined(OS_CHROMEOS)
URLRequest::RegisterProtocolFactory(kMetadataScheme,
&MetadataRequestHandler::Factory);
url_util::AddStandardScheme(kMetadataScheme);
#endif
}
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