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// Copyright 2016 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 "components/quirks/quirks_client.h"
#include "base/base64.h"
#include "base/files/file_util.h"
#include "base/json/json_reader.h"
#include "base/strings/stringprintf.h"
#include "base/task_runner_util.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "components/quirks/quirks_manager.h"
#include "components/version_info/version_info.h"
#include "net/base/load_flags.h"
#include "net/http/http_status_code.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request_context_getter.h"
namespace quirks {
namespace {
const char kQuirksUrlFormat[] =
"https://chromeosquirksserver-pa.googleapis.com/v2/display/%s/clients"
"/chromeos/M%d";
const int kMaxServerFailures = 10;
const net::BackoffEntry::Policy kDefaultBackoffPolicy = {
1, // Initial errors before applying backoff
10000, // 10 seconds.
2, // Factor by which the waiting time will be multiplied.
0, // Random fuzzing percentage.
1000 * 3600 * 6, // Max wait between requests = 6 hours.
-1, // Don't discard entry.
true, // Use initial delay after first error.
};
bool WriteIccFile(const base::FilePath file_path, const std::string& data) {
int bytes_written = base::WriteFile(file_path, data.data(), data.length());
if (bytes_written == -1)
LOG(ERROR) << "Write failed: " << file_path.value() << ", err = " << errno;
else
VLOG(1) << bytes_written << "bytes written to: " << file_path.value();
return (bytes_written != -1);
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// QuirksClient
QuirksClient::QuirksClient(int64_t product_id,
const RequestFinishedCallback& on_request_finished,
QuirksManager* manager)
: product_id_(product_id),
on_request_finished_(on_request_finished),
manager_(manager),
icc_path_(manager->delegate()->GetDisplayProfileDirectory().Append(
IdToFileName(product_id))),
backoff_entry_(&kDefaultBackoffPolicy),
weak_ptr_factory_(this) {}
QuirksClient::~QuirksClient() {}
void QuirksClient::StartDownload() {
DCHECK(thread_checker_.CalledOnValidThread());
// URL of icc file on Quirks Server.
int major_version = atoi(version_info::GetVersionNumber().c_str());
std::string url = base::StringPrintf(
kQuirksUrlFormat, IdToHexString(product_id_).c_str(), major_version);
VLOG(2) << "Preparing to download\n " << url << "\nto file "
<< icc_path_.value();
url += "?key=";
url += manager_->delegate()->GetApiKey();
url_fetcher_ = manager_->CreateURLFetcher(GURL(url), this);
url_fetcher_->SetRequestContext(manager_->url_context_getter());
url_fetcher_->SetLoadFlags(net::LOAD_BYPASS_CACHE | net::LOAD_DISABLE_CACHE |
net::LOAD_DO_NOT_SAVE_COOKIES |
net::LOAD_DO_NOT_SEND_COOKIES |
net::LOAD_DO_NOT_SEND_AUTH_DATA);
url_fetcher_->Start();
}
void QuirksClient::OnURLFetchComplete(const net::URLFetcher* source) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK_EQ(url_fetcher_.get(), source);
const int HTTP_INTERNAL_SERVER_ERROR_LAST =
net::HTTP_INTERNAL_SERVER_ERROR + 99;
const net::URLRequestStatus status = source->GetStatus();
const int response_code = source->GetResponseCode();
const bool server_error = !status.is_success() ||
(response_code >= net::HTTP_INTERNAL_SERVER_ERROR &&
response_code <= HTTP_INTERNAL_SERVER_ERROR_LAST);
VLOG(2) << "QuirksClient::OnURLFetchComplete():"
<< " status=" << status.status()
<< ", response_code=" << response_code
<< ", server_error=" << server_error;
if (response_code == net::HTTP_NOT_FOUND) {
VLOG(1) << IdToFileName(product_id_) << " not found on Quirks server.";
Shutdown(false);
return;
}
if (server_error) {
if (backoff_entry_.failure_count() >= kMaxServerFailures) {
// After 10 retires (5+ hours), give up, and try again in a month.
VLOG(1) << "Too many retries; Quirks Client shutting down.";
Shutdown(false);
return;
}
url_fetcher_.reset();
Retry();
return;
}
std::string response;
url_fetcher_->GetResponseAsString(&response);
VLOG(2) << "Quirks server response:\n" << response;
// Parse response data and write to file on file thread.
std::string data;
if (!ParseResult(response, &data)) {
Shutdown(false);
return;
}
base::PostTaskAndReplyWithResult(
manager_->blocking_pool(), FROM_HERE,
base::Bind(&WriteIccFile, icc_path_, data),
base::Bind(&QuirksClient::Shutdown, weak_ptr_factory_.GetWeakPtr()));
}
void QuirksClient::Shutdown(bool success) {
DCHECK(thread_checker_.CalledOnValidThread());
on_request_finished_.Run(success ? icc_path_ : base::FilePath(), true);
manager_->ClientFinished(this);
}
void QuirksClient::Retry() {
DCHECK(thread_checker_.CalledOnValidThread());
backoff_entry_.InformOfRequest(false);
const base::TimeDelta delay = backoff_entry_.GetTimeUntilRelease();
VLOG(1) << "Schedule next Quirks download attempt in " << delay.InSecondsF()
<< " seconds (retry = " << backoff_entry_.failure_count() << ").";
request_scheduled_.Start(FROM_HERE, delay, this,
&QuirksClient::StartDownload);
}
bool QuirksClient::ParseResult(const std::string& result, std::string* data) {
std::string data64;
const base::DictionaryValue* dict;
std::unique_ptr<base::Value> json = base::JSONReader::Read(result);
if (!json || !json->GetAsDictionary(&dict) ||
!dict->GetString("icc", &data64)) {
VLOG(1) << "Failed to parse JSON icc data";
return false;
}
if (!base::Base64Decode(data64, data)) {
VLOG(1) << "Failed to decode Base64 icc data";
return false;
}
return true;
}
} // namespace quirks
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