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// Copyright 2013 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/safe_browsing/download_feedback.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_util_proxy.h"
#include "base/metrics/histogram.h"
#include "base/task_runner.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/safe_browsing/csd.pb.h"
#include "net/base/net_errors.h"
namespace safe_browsing {
namespace {
// The default URL where browser sends download feedback requests.
const char kSbDefaultFeedbackURL[] =
"https://safebrowsing.google.com/safebrowsing/uploads/chrome";
// This enum is used by histograms. Do not change the ordering or remove items.
enum UploadResultType {
UPLOAD_SUCCESS,
UPLOAD_CANCELLED,
UPLOAD_METADATA_NET_ERROR,
UPLOAD_METADATA_RESPONSE_ERROR,
UPLOAD_FILE_NET_ERROR,
UPLOAD_FILE_RESPONSE_ERROR,
UPLOAD_COMPLETE_RESPONSE_ERROR,
// Memory space for histograms is determined by the max.
// ALWAYS ADD NEW VALUES BEFORE THIS ONE.
UPLOAD_RESULT_MAX
};
// Handles the uploading of a single downloaded binary to the safebrowsing
// download feedback service.
class DownloadFeedbackImpl : public DownloadFeedback {
public:
DownloadFeedbackImpl(net::URLRequestContextGetter* request_context_getter,
base::TaskRunner* file_task_runner,
const base::FilePath& file_path,
const std::string& ping_request,
const std::string& ping_response);
virtual ~DownloadFeedbackImpl();
virtual void Start(const base::Closure& finish_callback) OVERRIDE;
virtual const std::string& GetPingRequestForTesting() const OVERRIDE {
return ping_request_;
}
virtual const std::string& GetPingResponseForTesting() const OVERRIDE {
return ping_response_;
}
private:
// Callback for TwoPhaseUploader completion. Relays the result to the
// |finish_callback|.
void FinishedUpload(base::Closure finish_callback,
TwoPhaseUploader::State state,
int net_error,
int response_code,
const std::string& response);
void RecordUploadResult(UploadResultType result);
scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
scoped_refptr<base::TaskRunner> file_task_runner_;
const base::FilePath file_path_;
int64 file_size_;
// The safebrowsing request and response of checking that this binary is
// unsafe.
std::string ping_request_;
std::string ping_response_;
scoped_ptr<TwoPhaseUploader> uploader_;
DISALLOW_COPY_AND_ASSIGN(DownloadFeedbackImpl);
};
DownloadFeedbackImpl::DownloadFeedbackImpl(
net::URLRequestContextGetter* request_context_getter,
base::TaskRunner* file_task_runner,
const base::FilePath& file_path,
const std::string& ping_request,
const std::string& ping_response)
: request_context_getter_(request_context_getter),
file_task_runner_(file_task_runner),
file_path_(file_path),
file_size_(-1),
ping_request_(ping_request),
ping_response_(ping_response) {
DVLOG(1) << "DownloadFeedback constructed " << this << " for "
<< file_path.AsUTF8Unsafe();
}
DownloadFeedbackImpl::~DownloadFeedbackImpl() {
DCHECK(CalledOnValidThread());
DVLOG(1) << "DownloadFeedback destructed " << this;
if (uploader_) {
RecordUploadResult(UPLOAD_CANCELLED);
// Destroy the uploader before attempting to delete the file.
uploader_.reset();
}
base::FileUtilProxy::Delete(file_task_runner_.get(),
file_path_,
false,
base::FileUtilProxy::StatusCallback());
}
void DownloadFeedbackImpl::Start(const base::Closure& finish_callback) {
DCHECK(CalledOnValidThread());
DCHECK(!uploader_);
CommandLine* cmdline = CommandLine::ForCurrentProcess();
ClientDownloadReport report_metadata;
bool r = report_metadata.mutable_download_request()->ParseFromString(
ping_request_);
DCHECK(r);
r = report_metadata.mutable_download_response()->ParseFromString(
ping_response_);
DCHECK(r);
file_size_ = report_metadata.download_request().length();
GURL url = GURL(cmdline->HasSwitch(switches::kSbDownloadFeedbackURL) ?
cmdline->GetSwitchValueASCII(switches::kSbDownloadFeedbackURL) :
kSbDefaultFeedbackURL);
std::string metadata_string;
bool ok = report_metadata.SerializeToString(&metadata_string);
DCHECK(ok);
uploader_.reset(
TwoPhaseUploader::Create(request_context_getter_.get(),
file_task_runner_.get(),
url,
metadata_string,
file_path_,
TwoPhaseUploader::ProgressCallback(),
base::Bind(&DownloadFeedbackImpl::FinishedUpload,
base::Unretained(this),
finish_callback)));
uploader_->Start();
}
void DownloadFeedbackImpl::FinishedUpload(base::Closure finish_callback,
TwoPhaseUploader::State state,
int net_error,
int response_code,
const std::string& response_data) {
DCHECK(CalledOnValidThread());
DVLOG(1) << __FUNCTION__ << " " << state << " rlen=" << response_data.size();
switch (state) {
case TwoPhaseUploader::STATE_SUCCESS: {
ClientUploadResponse response;
if (!response.ParseFromString(response_data) ||
response.status() != ClientUploadResponse::SUCCESS)
RecordUploadResult(UPLOAD_COMPLETE_RESPONSE_ERROR);
else
RecordUploadResult(UPLOAD_SUCCESS);
break;
}
case TwoPhaseUploader::UPLOAD_FILE:
if (net_error != net::OK)
RecordUploadResult(UPLOAD_FILE_NET_ERROR);
else
RecordUploadResult(UPLOAD_FILE_RESPONSE_ERROR);
break;
case TwoPhaseUploader::UPLOAD_METADATA:
if (net_error != net::OK)
RecordUploadResult(UPLOAD_METADATA_NET_ERROR);
else
RecordUploadResult(UPLOAD_METADATA_RESPONSE_ERROR);
break;
default:
NOTREACHED();
}
uploader_.reset();
finish_callback.Run();
// We may be deleted here.
}
void DownloadFeedbackImpl::RecordUploadResult(UploadResultType result) {
if (result == UPLOAD_SUCCESS)
UMA_HISTOGRAM_CUSTOM_COUNTS(
"SBDownloadFeedback.SizeSuccess", file_size_, 1, kMaxUploadSize, 50);
else
UMA_HISTOGRAM_CUSTOM_COUNTS(
"SBDownloadFeedback.SizeFailure", file_size_, 1, kMaxUploadSize, 50);
UMA_HISTOGRAM_ENUMERATION(
"SBDownloadFeedback.UploadResult", result, UPLOAD_RESULT_MAX);
}
} // namespace
// static
const int64 DownloadFeedback::kMaxUploadSize = 50 * 1024 * 1024;
// static
DownloadFeedbackFactory* DownloadFeedback::factory_ = NULL;
// static
DownloadFeedback* DownloadFeedback::Create(
net::URLRequestContextGetter* request_context_getter,
base::TaskRunner* file_task_runner,
const base::FilePath& file_path,
const std::string& ping_request,
const std::string& ping_response) {
if (!DownloadFeedback::factory_)
return new DownloadFeedbackImpl(
request_context_getter, file_task_runner, file_path, ping_request,
ping_response);
return DownloadFeedback::factory_->CreateDownloadFeedback(
request_context_getter, file_task_runner, file_path, ping_request,
ping_response);
}
} // namespace safe_browsing
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