chrome/browser/component_updater/component_updater_configurator.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/component_updater/component_updater_configurator.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/command_line.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/win/windows_version.h"
  15 #include "build/build_config.h"
  16 #include "chrome/browser/component_updater/component_patcher.h"
  17 #include "chrome/common/chrome_switches.h"
  18 #include "net/url_request/url_request_context_getter.h"
  19
  20 namespace component_updater {
  21
  22 namespace {
  23
  24 // Default time constants.
  25 const int kDelayOneMinute = 60;
  26 const int kDelayOneHour = kDelayOneMinute * 60;
  27
  28 // Debug values you can pass to --component-updater=value1,value2.
  29 // Speed up component checking.
  30 const char kSwitchFastUpdate[] = "fast-update";
  31
  32 // Add "testrequest=1" attribute to the update check request.
  33 const char kSwitchRequestParam[] = "test-request";
  34
  35 // Disables pings. Pings are the requests sent to the update server that report
  36 // the success or the failure of component install or update attempts.
  37 extern const char kSwitchDisablePings[] = "disable-pings";
  38
  39 // Sets the URL for updates.
  40 const char kSwitchUrlSource[] = "url-source";
  41
  42 #define COMPONENT_UPDATER_SERVICE_ENDPOINT \
  43   "//clients2.google.com/service/update2"
  44
  45 // The default url for the v3 protocol service endpoint. Can be
  46 // overridden with --component-updater=url-source=someurl.
  47 const char kDefaultUrlSource[] = "https:" COMPONENT_UPDATER_SERVICE_ENDPOINT;
  48
  49 // The url to send the pings to.
  50 const char kPingUrl[] = "https:" COMPONENT_UPDATER_SERVICE_ENDPOINT;
  51
  52 // Disables differential updates.
  53 const char kSwitchDisableDeltaUpdates[] = "disable-delta-updates";
  54
  55 #if defined(OS_WIN)
  56 // Disables background downloads.
  57 const char kSwitchDisableBackgroundDownloads[] = "disable-background-downloads";
  58 #endif  // defined(OS_WIN)
  59
  60 // Returns true if and only if |test| is contained in |vec|.
  61 bool HasSwitchValue(const std::vector<std::string>& vec, const char* test) {
  62   if (vec.empty())
  63     return 0;
  64   return (std::find(vec.begin(), vec.end(), test) != vec.end());
  65 }
  66
  67 // If there is an element of |vec| of the form |test|=.*, returns the right-
  68 // hand side of that assignment. Otherwise, returns an empty string.
  69 // The right-hand side may contain additional '=' characters, allowing for
  70 // further nesting of switch arguments.
  71 std::string GetSwitchArgument(const std::vector<std::string>& vec,
  72                               const char* test) {
  73   if (vec.empty())
  74     return std::string();
  75   for (std::vector<std::string>::const_iterator it = vec.begin();
  76        it != vec.end();
  77        ++it) {
  78     const std::size_t found = it->find("=");
  79     if (found != std::string::npos) {
  80       if (it->substr(0, found) == test) {
  81         return it->substr(found + 1);
  82       }
  83     }
  84   }
  85   return std::string();
  86 }
  87
  88 }  // namespace
  89
  90 class ChromeConfigurator : public ComponentUpdateService::Configurator {
  91  public:
  92   ChromeConfigurator(const CommandLine* cmdline,
  93                      net::URLRequestContextGetter* url_request_getter);
  94
  95   virtual ~ChromeConfigurator() {}
  96
  97   virtual int InitialDelay() OVERRIDE;
  98   virtual int NextCheckDelay() OVERRIDE;
  99   virtual int StepDelay() OVERRIDE;
 100   virtual int StepDelayMedium() OVERRIDE;
 101   virtual int MinimumReCheckWait() OVERRIDE;
 102   virtual int OnDemandDelay() OVERRIDE;
 103   virtual GURL UpdateUrl() OVERRIDE;
 104   virtual GURL PingUrl() OVERRIDE;
 105   virtual std::string ExtraRequestParams() OVERRIDE;
 106   virtual size_t UrlSizeLimit() OVERRIDE;
 107   virtual net::URLRequestContextGetter* RequestContext() OVERRIDE;
 108   virtual bool InProcess() OVERRIDE;
 109   virtual bool DeltasEnabled() const OVERRIDE;
 110   virtual bool UseBackgroundDownloader() const OVERRIDE;
 111
 112  private:
 113   net::URLRequestContextGetter* url_request_getter_;
 114   std::string extra_info_;
 115   std::string url_source_;
 116   bool fast_update_;
 117   bool pings_enabled_;
 118   bool deltas_enabled_;
 119   bool background_downloads_enabled_;
 120 };
 121
 122 ChromeConfigurator::ChromeConfigurator(
 123     const CommandLine* cmdline,
 124     net::URLRequestContextGetter* url_request_getter)
 125     : url_request_getter_(url_request_getter),
 126       fast_update_(false),
 127       pings_enabled_(false),
 128       deltas_enabled_(false),
 129       background_downloads_enabled_(false) {
 130   // Parse comma-delimited debug flags.
 131   std::vector<std::string> switch_values;
 132   Tokenize(cmdline->GetSwitchValueASCII(switches::kComponentUpdater),
 133            ",",
 134            &switch_values);
 135   fast_update_ = HasSwitchValue(switch_values, kSwitchFastUpdate);
 136   pings_enabled_ = !HasSwitchValue(switch_values, kSwitchDisablePings);
 137   deltas_enabled_ = !HasSwitchValue(switch_values, kSwitchDisableDeltaUpdates);
 138
 139 #if defined(OS_WIN)
 140   background_downloads_enabled_ =
 141       !HasSwitchValue(switch_values, kSwitchDisableBackgroundDownloads);
 142 #else
 143   background_downloads_enabled_ = false;
 144 #endif
 145
 146   url_source_ = GetSwitchArgument(switch_values, kSwitchUrlSource);
 147   if (url_source_.empty()) {
 148     url_source_ = kDefaultUrlSource;
 149   }
 150
 151   if (HasSwitchValue(switch_values, kSwitchRequestParam))
 152     extra_info_ += "testrequest=\"1\"";
 153 }
 154
 155 int ChromeConfigurator::InitialDelay() {
 156   return fast_update_ ? 1 : (6 * kDelayOneMinute);
 157 }
 158
 159 int ChromeConfigurator::NextCheckDelay() {
 160   return fast_update_ ? 3 : (6 * kDelayOneHour);
 161 }
 162
 163 int ChromeConfigurator::StepDelayMedium() {
 164   return fast_update_ ? 3 : (15 * kDelayOneMinute);
 165 }
 166
 167 int ChromeConfigurator::StepDelay() {
 168   return fast_update_ ? 1 : 1;
 169 }
 170
 171 int ChromeConfigurator::MinimumReCheckWait() {
 172   return fast_update_ ? 30 : (6 * kDelayOneHour);
 173 }
 174
 175 int ChromeConfigurator::OnDemandDelay() {
 176   return fast_update_ ? 2 : (30 * kDelayOneMinute);
 177 }
 178
 179 GURL ChromeConfigurator::UpdateUrl() {
 180   return GURL(url_source_);
 181 }
 182
 183 GURL ChromeConfigurator::PingUrl() {
 184   return pings_enabled_ ? GURL(kPingUrl) : GURL();
 185 }
 186
 187 std::string ChromeConfigurator::ExtraRequestParams() {
 188   return extra_info_;
 189 }
 190
 191 size_t ChromeConfigurator::UrlSizeLimit() {
 192   return 1024ul;
 193 }
 194
 195 net::URLRequestContextGetter* ChromeConfigurator::RequestContext() {
 196   return url_request_getter_;
 197 }
 198
 199 bool ChromeConfigurator::InProcess() {
 200   return false;
 201 }
 202
 203 bool ChromeConfigurator::DeltasEnabled() const {
 204   return deltas_enabled_;
 205 }
 206
 207 bool ChromeConfigurator::UseBackgroundDownloader() const {
 208   return background_downloads_enabled_;
 209 }
 210
 211 ComponentUpdateService::Configurator* MakeChromeComponentUpdaterConfigurator(
 212     const CommandLine* cmdline,
 213     net::URLRequestContextGetter* context_getter) {
 214   return new ChromeConfigurator(cmdline, context_getter);
 215 }
 216
 217 }  // namespace component_updater