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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/profile_resetter/brandcode_config_fetcher.h"
#include <stddef.h>
#include <memory>
#include <vector>
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profile_resetter/brandcoded_default_settings.h"
#include "net/base/load_flags.h"
#include "net/http/http_response_headers.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "services/data_decoder/public/cpp/safe_xml_parser.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
namespace {
const int kDownloadTimeoutSec = 10;
const char kPostXml[] =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
"<request"
" version=\"chromeprofilereset-1.1\""
" protocol=\"3.0\""
" installsource=\"profilereset\">"
" <app appid=\"{8A69D345-D564-463C-AFF1-A69D9E530F96}\">"
" <data name=\"install\" index=\"__BRANDCODE_PLACEHOLDER__\"/>"
" </app>"
"</request>";
// Returns the query to the server which can be used to retrieve the config.
// |brand| is a brand code, it mustn't be empty.
std::string GetUploadData(const std::string& brand) {
DCHECK(!brand.empty());
std::string data(kPostXml);
const std::string placeholder("__BRANDCODE_PLACEHOLDER__");
size_t placeholder_pos = data.find(placeholder);
DCHECK(placeholder_pos != std::string::npos);
data.replace(placeholder_pos, placeholder.size(), brand);
return data;
}
} // namespace
BrandcodeConfigFetcher::BrandcodeConfigFetcher(
network::mojom::URLLoaderFactory* url_loader_factory,
FetchCallback callback,
const GURL& url,
const std::string& brandcode)
: fetch_callback_(std::move(callback)), weak_ptr_factory_(this) {
DCHECK(!brandcode.empty());
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("brandcode_config", R"(
semantics {
sender: "Brandcode Configuration Fetcher"
description:
"Chrome installation can be non-organic. That means that Chrome "
"is distributed by partners and it has a brand code associated "
"with that partner. For the settings reset operation, Chrome needs "
"to know the default settings which are partner specific."
trigger: "'Reset Settings' invocation from Chrome settings."
data: "Brandcode."
destination: GOOGLE_OWNED_SERVICE
}
policy {
cookies_allowed: NO
setting:
"This feature cannot be disabled and is only invoked by user "
"request."
policy_exception_justification:
"Not implemented, considered not useful as enterprises don't need "
"to install Chrome in a non-organic fashion."
})");
auto resource_request = std::make_unique<network::ResourceRequest>();
resource_request->url = url;
resource_request->load_flags = net::LOAD_DISABLE_CACHE;
resource_request->credentials_mode = network::mojom::CredentialsMode::kOmit;
resource_request->method = "POST";
resource_request->headers.SetHeader("Accept", "text/xml");
simple_url_loader_ = network::SimpleURLLoader::Create(
std::move(resource_request), traffic_annotation);
simple_url_loader_->AttachStringForUpload(GetUploadData(brandcode),
"text/xml");
simple_url_loader_->DownloadToStringOfUnboundedSizeUntilCrashAndDie(
url_loader_factory,
base::BindOnce(&BrandcodeConfigFetcher::OnSimpleLoaderComplete,
weak_ptr_factory_.GetWeakPtr()));
// Abort the download attempt if it takes too long.
download_timer_.Start(FROM_HERE, base::Seconds(kDownloadTimeoutSec), this,
&BrandcodeConfigFetcher::OnDownloadTimeout);
}
BrandcodeConfigFetcher::~BrandcodeConfigFetcher() = default;
void BrandcodeConfigFetcher::SetCallback(FetchCallback callback) {
fetch_callback_ = std::move(callback);
}
void BrandcodeConfigFetcher::OnSimpleLoaderComplete(
std::unique_ptr<std::string> response_body) {
const bool is_valid_response =
response_body && simple_url_loader_->ResponseInfo() &&
simple_url_loader_->ResponseInfo()->mime_type == "text/xml";
// Release resources before potentially running the callback.
simple_url_loader_.reset();
download_timer_.Stop();
if (is_valid_response) {
data_decoder::DataDecoder::ParseXmlIsolated(
*response_body,
data_decoder::mojom::XmlParser::WhitespaceBehavior::kIgnore,
base::BindOnce(&BrandcodeConfigFetcher::OnXmlConfigParsed,
weak_ptr_factory_.GetWeakPtr()));
} else {
std::move(fetch_callback_).Run();
}
// `this` may now be deleted from `fetch_callback_`.
}
void BrandcodeConfigFetcher::OnXmlConfigParsed(
data_decoder::DataDecoder::ValueOrError value_or_error) {
// The |fetch_callback_| is called in the case of either success or
// failure. The difference is whether |default_settings_| is populated.
base::ScopedClosureRunner scoped_closure(std::move(fetch_callback_));
if (!value_or_error.has_value())
return;
const base::Value* node = &*value_or_error;
if (!data_decoder::IsXmlElementNamed(*node, "response"))
return;
// Descend this tag path to find the node containing the JSON data.
const char* kDataPath[] = {"app", "data"};
for (const auto* tag : kDataPath) {
node = data_decoder::GetXmlElementChildWithTag(*node, tag);
if (!node)
return;
}
// Extract the text JSON data from the "data" node to specify the new
// settings.
std::string master_prefs;
if (node && data_decoder::GetXmlElementText(*node, &master_prefs)) {
default_settings_ =
std::make_unique<BrandcodedDefaultSettings>(master_prefs);
}
}
void BrandcodeConfigFetcher::OnDownloadTimeout() {
if (simple_url_loader_) {
simple_url_loader_.reset();
std::move(fetch_callback_).Run();
}
}
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