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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/extensions/blacklist_state_fetcher.h"
#include "base/stl_util.h"
#include "base/strings/stringprintf.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/safe_browsing/protocol_manager_helper.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#include "chrome/common/safe_browsing/crx_info.pb.h"
#include "google_apis/google_api_keys.h"
#include "net/base/escape.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
#include "net/url_request/url_request_status.h"
#include "url/gurl.h"
using content::BrowserThread;
namespace {
class BlacklistRequestContextGetter : public net::URLRequestContextGetter {
public:
explicit BlacklistRequestContextGetter(
net::URLRequestContextGetter* parent_context_getter) :
network_task_runner_(
BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
url_request_context_.reset(new net::URLRequestContext());
url_request_context_->CopyFrom(
parent_context_getter->GetURLRequestContext());
}
static void Create(
scoped_refptr<net::URLRequestContextGetter> parent_context_getter,
base::Callback<void(scoped_refptr<net::URLRequestContextGetter>)>
callback) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
scoped_refptr<net::URLRequestContextGetter> context_getter =
new BlacklistRequestContextGetter(parent_context_getter.get());
BrowserThread::PostTask(BrowserThread::UI,
FROM_HERE,
base::Bind(callback, context_getter));
}
net::URLRequestContext* GetURLRequestContext() override {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
return url_request_context_.get();
}
scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
const override {
return network_task_runner_;
}
protected:
~BlacklistRequestContextGetter() override {
url_request_context_->AssertNoURLRequests();
}
private:
scoped_ptr<net::URLRequestContext> url_request_context_;
scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;
};
} // namespace
namespace extensions {
BlacklistStateFetcher::BlacklistStateFetcher()
: url_fetcher_id_(0),
weak_ptr_factory_(this) {}
BlacklistStateFetcher::~BlacklistStateFetcher() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
STLDeleteContainerPairFirstPointers(requests_.begin(), requests_.end());
requests_.clear();
}
void BlacklistStateFetcher::Request(const std::string& id,
const RequestCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!safe_browsing_config_) {
if (g_browser_process && g_browser_process->safe_browsing_service()) {
SetSafeBrowsingConfig(
g_browser_process->safe_browsing_service()->GetProtocolConfig());
} else {
base::MessageLoopProxy::current()->PostTask(
FROM_HERE, base::Bind(callback, BLACKLISTED_UNKNOWN));
return;
}
}
bool request_already_sent = ContainsKey(callbacks_, id);
callbacks_.insert(std::make_pair(id, callback));
if (request_already_sent)
return;
if (url_request_context_getter_.get() || !g_browser_process ||
!g_browser_process->safe_browsing_service()) {
SendRequest(id);
} else {
scoped_refptr<net::URLRequestContextGetter> parent_request_context;
if (g_browser_process && g_browser_process->safe_browsing_service()) {
parent_request_context = g_browser_process->safe_browsing_service()
->url_request_context();
} else {
parent_request_context = parent_request_context_for_test_;
}
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&BlacklistRequestContextGetter::Create,
parent_request_context,
base::Bind(&BlacklistStateFetcher::SaveRequestContext,
weak_ptr_factory_.GetWeakPtr(),
id)));
}
}
void BlacklistStateFetcher::SaveRequestContext(
const std::string& id,
scoped_refptr<net::URLRequestContextGetter> request_context_getter) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!url_request_context_getter_.get())
url_request_context_getter_ = request_context_getter;
SendRequest(id);
}
void BlacklistStateFetcher::SendRequest(const std::string& id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
ClientCRXListInfoRequest request;
request.set_id(id);
std::string request_str;
request.SerializeToString(&request_str);
GURL request_url = RequestUrl();
net::URLFetcher* fetcher = net::URLFetcher::Create(url_fetcher_id_++,
request_url,
net::URLFetcher::POST,
this);
requests_[fetcher] = id;
fetcher->SetAutomaticallyRetryOn5xx(false); // Don't retry on error.
fetcher->SetRequestContext(url_request_context_getter_.get());
fetcher->SetUploadData("application/octet-stream", request_str);
fetcher->Start();
}
void BlacklistStateFetcher::SetSafeBrowsingConfig(
const SafeBrowsingProtocolConfig& config) {
safe_browsing_config_.reset(new SafeBrowsingProtocolConfig(config));
}
void BlacklistStateFetcher::SetURLRequestContextForTest(
net::URLRequestContextGetter* parent_request_context) {
parent_request_context_for_test_ = parent_request_context;
}
GURL BlacklistStateFetcher::RequestUrl() const {
std::string url = base::StringPrintf(
"%s/%s?client=%s&appver=%s&pver=2.2",
safe_browsing_config_->url_prefix.c_str(),
"clientreport/crx-list-info",
safe_browsing_config_->client_name.c_str(),
safe_browsing_config_->version.c_str());
std::string api_key = google_apis::GetAPIKey();
if (!api_key.empty()) {
base::StringAppendF(&url, "&key=%s",
net::EscapeQueryParamValue(api_key, true).c_str());
}
return GURL(url);
}
void BlacklistStateFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::map<const net::URLFetcher*, std::string>::iterator it =
requests_.find(source);
if (it == requests_.end()) {
NOTREACHED();
return;
}
scoped_ptr<const net::URLFetcher> fetcher;
fetcher.reset(it->first);
std::string id = it->second;
requests_.erase(it);
BlacklistState state;
if (source->GetStatus().is_success() && source->GetResponseCode() == 200) {
std::string data;
source->GetResponseAsString(&data);
ClientCRXListInfoResponse response;
if (response.ParseFromString(data)) {
state = static_cast<BlacklistState>(response.verdict());
} else {
state = BLACKLISTED_UNKNOWN;
}
} else {
if (source->GetStatus().status() == net::URLRequestStatus::FAILED) {
VLOG(1) << "Blacklist request for: " << id
<< " failed with error: " << source->GetStatus().error();
} else {
VLOG(1) << "Blacklist request for: " << id
<< " failed with error: " << source->GetResponseCode();
}
state = BLACKLISTED_UNKNOWN;
}
std::pair<CallbackMultiMap::iterator, CallbackMultiMap::iterator> range =
callbacks_.equal_range(id);
for (CallbackMultiMap::const_iterator callback_it = range.first;
callback_it != range.second;
++callback_it) {
callback_it->second.Run(state);
}
callbacks_.erase(range.first, range.second);
}
} // namespace extensions
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