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// Copyright (c) 2012 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/component_updater/component_updater_configurator.h"
#include <algorithm>
#include <string>
#include <vector>
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/strings/string_util.h"
#include "base/win/windows_version.h"
#include "build/build_config.h"
#include "chrome/browser/component_updater/component_patcher.h"
#include "chrome/common/chrome_switches.h"
#include "net/url_request/url_request_context_getter.h"
#if defined(OS_WIN)
#include "chrome/browser/component_updater/component_patcher_win.h"
#endif
namespace {
// Default time constants.
const int kDelayOneMinute = 60;
const int kDelayOneHour = kDelayOneMinute * 60;
// Debug values you can pass to --component-updater=value1,value2.
// Speed up component checking.
const char kSwitchFastUpdate[] = "fast-update";
// Add "testrequest=1" attribute to the update check request.
const char kSwitchRequestParam[] = "test-request";
// Disables pings. Pings are the requests sent to the update server that report
// the success or the failure of component install or update attempts.
extern const char kSwitchDisablePings[] = "disable-pings";
// Sets the URL for updates.
const char kSwitchUrlSource[] = "url-source";
#define COMPONENT_UPDATER_SERVICE_ENDPOINT \
"//clients2.google.com/service/update2"
// The default url for the v3 protocol service endpoint. Can be
// overridden with --component-updater=url-source=someurl.
const char kDefaultUrlSource[] = "https:" COMPONENT_UPDATER_SERVICE_ENDPOINT;
// The url to send the pings to.
const char kPingUrl[] = "http:" COMPONENT_UPDATER_SERVICE_ENDPOINT;
#if defined(OS_WIN)
// Disables differential updates.
const char kSwitchDisableDeltaUpdates[] = "disable-delta-updates";
// Disables background downloads.
const char kSwitchDisableBackgroundDownloads[] = "disable-background-downloads";
#endif // defined(OS_WIN)
// Returns true if and only if |test| is contained in |vec|.
bool HasSwitchValue(const std::vector<std::string>& vec, const char* test) {
if (vec.empty())
return 0;
return (std::find(vec.begin(), vec.end(), test) != vec.end());
}
// If there is an element of |vec| of the form |test|=.*, returns the right-
// hand side of that assignment. Otherwise, returns an empty string.
// The right-hand side may contain additional '=' characters, allowing for
// further nesting of switch arguments.
std::string GetSwitchArgument(const std::vector<std::string>& vec,
const char* test) {
if (vec.empty())
return std::string();
for (std::vector<std::string>::const_iterator it = vec.begin();
it != vec.end();
++it) {
const std::size_t found = it->find("=");
if (found != std::string::npos) {
if (it->substr(0, found) == test) {
return it->substr(found + 1);
}
}
}
return std::string();
}
} // namespace
class ChromeConfigurator : public ComponentUpdateService::Configurator {
public:
ChromeConfigurator(const CommandLine* cmdline,
net::URLRequestContextGetter* url_request_getter);
virtual ~ChromeConfigurator() {}
virtual int InitialDelay() OVERRIDE;
virtual int NextCheckDelay() OVERRIDE;
virtual int StepDelay() OVERRIDE;
virtual int StepDelayMedium() OVERRIDE;
virtual int MinimumReCheckWait() OVERRIDE;
virtual int OnDemandDelay() OVERRIDE;
virtual GURL UpdateUrl() OVERRIDE;
virtual GURL PingUrl() OVERRIDE;
virtual std::string ExtraRequestParams() OVERRIDE;
virtual size_t UrlSizeLimit() OVERRIDE;
virtual net::URLRequestContextGetter* RequestContext() OVERRIDE;
virtual bool InProcess() OVERRIDE;
virtual ComponentPatcher* CreateComponentPatcher() OVERRIDE;
virtual bool DeltasEnabled() const OVERRIDE;
virtual bool UseBackgroundDownloader() const OVERRIDE;
private:
net::URLRequestContextGetter* url_request_getter_;
std::string extra_info_;
std::string url_source_;
bool fast_update_;
bool pings_enabled_;
bool deltas_enabled_;
bool background_downloads_enabled_;
};
ChromeConfigurator::ChromeConfigurator(const CommandLine* cmdline,
net::URLRequestContextGetter* url_request_getter)
: url_request_getter_(url_request_getter),
fast_update_(false),
pings_enabled_(false),
deltas_enabled_(false),
background_downloads_enabled_(false) {
// Parse comma-delimited debug flags.
std::vector<std::string> switch_values;
Tokenize(cmdline->GetSwitchValueASCII(switches::kComponentUpdater),
",", &switch_values);
fast_update_ = HasSwitchValue(switch_values, kSwitchFastUpdate);
pings_enabled_ = !HasSwitchValue(switch_values, kSwitchDisablePings);
#if defined(OS_WIN)
deltas_enabled_ = !HasSwitchValue(switch_values, kSwitchDisableDeltaUpdates);
background_downloads_enabled_ =
!HasSwitchValue(switch_values, kSwitchDisableBackgroundDownloads);
#else
deltas_enabled_ = false;
background_downloads_enabled_ = false;
#endif
url_source_ = GetSwitchArgument(switch_values, kSwitchUrlSource);
if (url_source_.empty()) {
url_source_ = kDefaultUrlSource;
}
if (HasSwitchValue(switch_values, kSwitchRequestParam))
extra_info_ += "testrequest=\"1\"";
}
int ChromeConfigurator::InitialDelay() {
return fast_update_ ? 1 : (6 * kDelayOneMinute);
}
int ChromeConfigurator::NextCheckDelay() {
return fast_update_ ? 3 : (2 * kDelayOneHour);
}
int ChromeConfigurator::StepDelayMedium() {
return fast_update_ ? 3 : (15 * kDelayOneMinute);
}
int ChromeConfigurator::StepDelay() {
return fast_update_ ? 1 : 1;
}
int ChromeConfigurator::MinimumReCheckWait() {
return fast_update_ ? 30 : (6 * kDelayOneHour);
}
int ChromeConfigurator::OnDemandDelay() {
return fast_update_ ? 2 : (30 * kDelayOneMinute);
}
GURL ChromeConfigurator::UpdateUrl() {
return GURL(url_source_);
}
GURL ChromeConfigurator::PingUrl() {
return pings_enabled_ ? GURL(kPingUrl) : GURL();
}
std::string ChromeConfigurator::ExtraRequestParams() {
return extra_info_;
}
size_t ChromeConfigurator::UrlSizeLimit() {
return 1024ul;
}
net::URLRequestContextGetter* ChromeConfigurator::RequestContext() {
return url_request_getter_;
}
bool ChromeConfigurator::InProcess() {
return false;
}
ComponentPatcher* ChromeConfigurator::CreateComponentPatcher() {
#if defined(OS_WIN)
return new ComponentPatcherWin();
#else
return new ComponentPatcherCrossPlatform();
#endif
}
bool ChromeConfigurator::DeltasEnabled() const {
return deltas_enabled_;
}
bool ChromeConfigurator::UseBackgroundDownloader() const {
return background_downloads_enabled_;
}
ComponentUpdateService::Configurator* MakeChromeComponentUpdaterConfigurator(
const CommandLine* cmdline, net::URLRequestContextGetter* context_getter) {
return new ChromeConfigurator(cmdline, context_getter);
}
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