Componentize ComponentUpdaterConfigurator

chrome/browser/component_updater/chrome_component_updater_configurator.cc

 // Copyright 2014 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/chrome_component_updater_configurator.h"
 
-#include <algorithm>
 #include <string>
-#include <vector>
 
-#include "base/command_line.h"
-#include "base/compiler_specific.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/version.h"
-#include "build/build_config.h"
 #include "chrome/browser/component_updater/component_patcher_operation_out_of_process.h"
-#include "chrome/browser/component_updater/component_updater_url_constants.h"
 #include "chrome/browser/update_client/chrome_update_query_params_delegate.h"
-#include "components/component_updater/component_updater_switches.h"
-#include "components/update_client/configurator.h"
-#include "components/version_info/version_info.h"
+#include "chrome/common/channel_info.h"
+#include "components/component_updater/configurator_impl.h"
 #include "content/public/browser/browser_thread.h"
-#include "net/url_request/url_request_context_getter.h"
-#include "url/gurl.h"
-
-#if defined(OS_WIN)
-#include "base/win/win_util.h"
-#endif  // OS_WIN
-
-using update_client::Configurator;
-using update_client::OutOfProcessPatcher;
 
 namespace component_updater {
 
 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";
-
-// Disables differential updates.
-const char kSwitchDisableDeltaUpdates[] = "disable-delta-updates";
-
-#if defined(OS_WIN)
-// 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());
-}
-
-// Returns true if falling back on an alternate, unsafe, service URL is
-// allowed. In the fallback case, the security of the component update relies
-// only on the integrity of the CRX payloads, which is self-validating.
-// This is allowed only for some of the pre-Windows Vista versions not including
-// Windows XP SP3. As a side note, pings could be sent to the alternate URL too.
-bool CanUseAltUrlSource() {
-#if defined(OS_WIN)
-  return !base::win::MaybeHasSHA256Support();
-#else
-  return false;
-#endif  // OS_WIN
-}
-
-// 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();
-}
-
-class ChromeConfigurator : public Configurator {
+class ChromeConfigurator : public update_client::Configurator {
  public:
   ChromeConfigurator(const base::CommandLine* cmdline,
                      net::URLRequestContextGetter* url_request_getter);
 
+  // update_client::Configurator overrides.
   int InitialDelay() const override;
   int NextCheckDelay() const override;
   int StepDelay() const override;
   int OnDemandDelay() const override;
   int UpdateDelay() const override;
   std::vector<GURL> UpdateUrl() const override;
   std::vector<GURL> PingUrl() const override;
   base::Version GetBrowserVersion() const override;
   std::string GetChannel() const override;
   std::string GetLang() const override;
   std::string GetOSLongName() const override;
   std::string ExtraRequestParams() const override;
   net::URLRequestContextGetter* RequestContext() const override;
-  scoped_refptr<OutOfProcessPatcher> CreateOutOfProcessPatcher() const override;
+  scoped_refptr<update_client::OutOfProcessPatcher> CreateOutOfProcessPatcher()
+      const override;
   bool DeltasEnabled() const override;
   bool UseBackgroundDownloader() const override;
   scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner()
       const override;
   scoped_refptr<base::SingleThreadTaskRunner> GetSingleThreadTaskRunner()
       const override;
 
  private:
   friend class base::RefCountedThreadSafe<ChromeConfigurator>;
 
+  ConfiguratorImpl configurator_impl_;
+
   ~ChromeConfigurator() override {}
-
-  net::URLRequestContextGetter* url_request_getter_;
-  std::string extra_info_;
-  GURL url_source_override_;
-  bool fast_update_;
-  bool pings_enabled_;
-  bool deltas_enabled_;
-  bool background_downloads_enabled_;
-  bool fallback_to_alt_source_url_enabled_;
 };
 
 ChromeConfigurator::ChromeConfigurator(
     const base::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),
-      fallback_to_alt_source_url_enabled_(false) {
-  // Parse comma-delimited debug flags.
-  std::vector<std::string> switch_values = base::SplitString(
-      cmdline->GetSwitchValueASCII(switches::kComponentUpdater),
-      ",", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
-  fast_update_ = HasSwitchValue(switch_values, kSwitchFastUpdate);
-  pings_enabled_ = !HasSwitchValue(switch_values, kSwitchDisablePings);
-  deltas_enabled_ = !HasSwitchValue(switch_values, kSwitchDisableDeltaUpdates);
-
-#if defined(OS_WIN)
-  background_downloads_enabled_ =
-      !HasSwitchValue(switch_values, kSwitchDisableBackgroundDownloads);
-#else
-  background_downloads_enabled_ = false;
-#endif
-
-  const std::string switch_url_source =
-      GetSwitchArgument(switch_values, kSwitchUrlSource);
-  if (!switch_url_source.empty()) {
-    url_source_override_ = GURL(switch_url_source);
-    DCHECK(url_source_override_.is_valid());
-  }
-
-  if (HasSwitchValue(switch_values, kSwitchRequestParam))
-    extra_info_ += "testrequest=\"1\"";
-
-  fallback_to_alt_source_url_enabled_ = CanUseAltUrlSource();
-}
+    : configurator_impl_(cmdline, url_request_getter) {}
 
 int ChromeConfigurator::InitialDelay() const {
-  return fast_update_ ? 10 : (6 * kDelayOneMinute);
+  return configurator_impl_.InitialDelay();
 }
 
 int ChromeConfigurator::NextCheckDelay() const {
-  return fast_update_ ? 60 : (6 * kDelayOneHour);
+  return configurator_impl_.NextCheckDelay();
 }
 
 int ChromeConfigurator::StepDelay() const {
-  return fast_update_ ? 1 : 1;
+  return configurator_impl_.StepDelay();
 }
 
 int ChromeConfigurator::OnDemandDelay() const {
-  return fast_update_ ? 2 : (30 * kDelayOneMinute);
+  return configurator_impl_.OnDemandDelay();
 }
 
 int ChromeConfigurator::UpdateDelay() const {
-  return fast_update_ ? 10 : (15 * kDelayOneMinute);
+  return configurator_impl_.UpdateDelay();
 }
 
 std::vector<GURL> ChromeConfigurator::UpdateUrl() const {
-  std::vector<GURL> urls;
-  if (url_source_override_.is_valid()) {
-    urls.push_back(GURL(url_source_override_));
-  } else {
-    urls.push_back(GURL(kUpdaterDefaultUrl));
-    if (fallback_to_alt_source_url_enabled_) {
-      urls.push_back(GURL(kUpdaterAltUrl));
-    }
-  }
-  return urls;
+  return configurator_impl_.UpdateUrl();
 }
 
 std::vector<GURL> ChromeConfigurator::PingUrl() const {
-  return pings_enabled_ ? UpdateUrl() : std::vector<GURL>();
+  return configurator_impl_.PingUrl();
 }
 
 base::Version ChromeConfigurator::GetBrowserVersion() const {
-  return base::Version(version_info::GetVersionNumber());
+  return configurator_impl_.GetBrowserVersion();
 }
 
 std::string ChromeConfigurator::GetChannel() const {
-  return ChromeUpdateQueryParamsDelegate::GetChannelString();
+  return chrome::GetChannelString();
 }
 
 std::string ChromeConfigurator::GetLang() const {
   return ChromeUpdateQueryParamsDelegate::GetLang();
 }
 
 std::string ChromeConfigurator::GetOSLongName() const {
-  return version_info::GetOSType();
+  return configurator_impl_.GetOSLongName();
 }
 
 std::string ChromeConfigurator::ExtraRequestParams() const {
-  return extra_info_;
+  return configurator_impl_.ExtraRequestParams();
 }
 
 net::URLRequestContextGetter* ChromeConfigurator::RequestContext() const {
-  return url_request_getter_;
+  return configurator_impl_.RequestContext();
 }
 
-scoped_refptr<OutOfProcessPatcher>
+scoped_refptr<update_client::OutOfProcessPatcher>
 ChromeConfigurator::CreateOutOfProcessPatcher() const {
   return make_scoped_refptr(new ChromeOutOfProcessPatcher);
 }
 
 bool ChromeConfigurator::DeltasEnabled() const {
-  return deltas_enabled_;
+  return configurator_impl_.DeltasEnabled();
 }
 
 bool ChromeConfigurator::UseBackgroundDownloader() const {
-  return background_downloads_enabled_;
+  return configurator_impl_.UseBackgroundDownloader();
 }
 
 scoped_refptr<base::SequencedTaskRunner>
 ChromeConfigurator::GetSequencedTaskRunner() const {
   return content::BrowserThread::GetBlockingPool()
       ->GetSequencedTaskRunnerWithShutdownBehavior(
           content::BrowserThread::GetBlockingPool()->GetSequenceToken(),
           base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 ChromeConfigurator::GetSingleThreadTaskRunner() const {
   return content::BrowserThread::GetMessageLoopProxyForThread(
       content::BrowserThread::FILE);
 }
 
 }  // namespace
 
 scoped_refptr<update_client::Configurator>
 MakeChromeComponentUpdaterConfigurator(
     const base::CommandLine* cmdline,
     net::URLRequestContextGetter* context_getter) {
   return new ChromeConfigurator(cmdline, context_getter);
 }
 
 }  // namespace component_updater