chrome/service/cloud_print/cloud_print_proxy.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/service/cloud_print/cloud_print_proxy.h"
   6
   7 #include "base/bind.h"
   8 #include "base/command_line.h"
   9 #include "base/metrics/histogram.h"
  10 #include "base/path_service.h"
  11 #include "base/process/kill.h"
  12 #include "base/process/launch.h"
  13 #include "base/values.h"
  14 #include "chrome/common/chrome_switches.h"
  15 #include "chrome/common/cloud_print/cloud_print_constants.h"
  16 #include "chrome/common/cloud_print/cloud_print_proxy_info.h"
  17 #include "chrome/common/pref_names.h"
  18 #include "chrome/service/cloud_print/print_system.h"
  19 #include "chrome/service/service_process.h"
  20 #include "chrome/service/service_process_prefs.h"
  21 #include "google_apis/gaia/gaia_oauth_client.h"
  22 #include "google_apis/google_api_keys.h"
  23 #include "url/gurl.h"
  24
  25 namespace cloud_print {
  26
  27 CloudPrintProxy::CloudPrintProxy()
  28     : service_prefs_(NULL),
  29       client_(NULL),
  30       enabled_(false) {
  31 }
  32
  33 CloudPrintProxy::~CloudPrintProxy() {
  34   DCHECK(CalledOnValidThread());
  35   ShutdownBackend();
  36 }
  37
  38 void CloudPrintProxy::Initialize(ServiceProcessPrefs* service_prefs,
  39                                  Client* client) {
  40   DCHECK(CalledOnValidThread());
  41   service_prefs_ = service_prefs;
  42   client_ = client;
  43 }
  44
  45 void CloudPrintProxy::EnableForUser() {
  46   DCHECK(CalledOnValidThread());
  47   if (!CreateBackend())
  48     return;
  49   DCHECK(backend_.get());
  50   // Read persisted robot credentials because we may decide to reuse it if the
  51   // passed in LSID belongs the same user.
  52   std::string robot_refresh_token = service_prefs_->GetString(
  53       prefs::kCloudPrintRobotRefreshToken, std::string());
  54   std::string robot_email =
  55       service_prefs_->GetString(prefs::kCloudPrintRobotEmail, std::string());
  56   user_email_ = service_prefs_->GetString(prefs::kCloudPrintEmail, user_email_);
  57
  58   // See if we have persisted robot credentials.
  59   if (!robot_refresh_token.empty()) {
  60     DCHECK(!robot_email.empty());
  61     backend_->InitializeWithRobotToken(robot_refresh_token, robot_email);
  62   } else {
  63     // Finally see if we have persisted user credentials (legacy case).
  64     std::string cloud_print_token =
  65         service_prefs_->GetString(prefs::kCloudPrintAuthToken, std::string());
  66     DCHECK(!cloud_print_token.empty());
  67     backend_->InitializeWithToken(cloud_print_token);
  68   }
  69   if (client_) {
  70     client_->OnCloudPrintProxyEnabled(true);
  71   }
  72 }
  73
  74 void CloudPrintProxy::EnableForUserWithRobot(
  75     const std::string& robot_auth_code,
  76     const std::string& robot_email,
  77     const std::string& user_email,
  78     const base::DictionaryValue& user_settings) {
  79   DCHECK(CalledOnValidThread());
  80
  81   ShutdownBackend();
  82   std::string proxy_id(
  83       service_prefs_->GetString(prefs::kCloudPrintProxyId, std::string()));
  84   service_prefs_->RemovePref(prefs::kCloudPrintRoot);
  85   if (!proxy_id.empty()) {
  86     // Keep only proxy id;
  87     service_prefs_->SetString(prefs::kCloudPrintProxyId, proxy_id);
  88   }
  89   service_prefs_->SetValue(prefs::kCloudPrintUserSettings,
  90                            user_settings.CreateDeepCopy());
  91   service_prefs_->WritePrefs();
  92
  93   if (!CreateBackend())
  94     return;
  95   DCHECK(backend_.get());
  96   user_email_ = user_email;
  97   backend_->InitializeWithRobotAuthCode(robot_auth_code, robot_email);
  98   if (client_) {
  99     client_->OnCloudPrintProxyEnabled(true);
 100   }
 101 }
 102
 103 bool CloudPrintProxy::CreateBackend() {
 104   DCHECK(CalledOnValidThread());
 105   if (backend_.get())
 106     return false;
 107
 108   ConnectorSettings settings;
 109   settings.InitFrom(service_prefs_);
 110
 111   // By default we don't poll for jobs when we lose XMPP connection. But this
 112   // behavior can be overridden by a preference.
 113   bool enable_job_poll =
 114     service_prefs_->GetBoolean(prefs::kCloudPrintEnableJobPoll, false);
 115
 116   gaia::OAuthClientInfo oauth_client_info;
 117   oauth_client_info.client_id =
 118     google_apis::GetOAuth2ClientID(google_apis::CLIENT_CLOUD_PRINT);
 119   oauth_client_info.client_secret =
 120     google_apis::GetOAuth2ClientSecret(google_apis::CLIENT_CLOUD_PRINT);
 121   oauth_client_info.redirect_uri = "oob";
 122   backend_.reset(new CloudPrintProxyBackend(
 123       this, settings, oauth_client_info, enable_job_poll));
 124   return true;
 125 }
 126
 127 void CloudPrintProxy::UnregisterPrintersAndDisableForUser() {
 128   DCHECK(CalledOnValidThread());
 129   if (backend_.get()) {
 130     // Try getting auth and printers info from the backend.
 131     // We'll get notified in this case.
 132     backend_->UnregisterPrinters();
 133   } else {
 134     // If no backend avaialble, disable connector immidiately.
 135     DisableForUser();
 136   }
 137 }
 138
 139 void CloudPrintProxy::DisableForUser() {
 140   DCHECK(CalledOnValidThread());
 141   user_email_.clear();
 142   enabled_ = false;
 143   if (client_) {
 144     client_->OnCloudPrintProxyDisabled(true);
 145   }
 146   ShutdownBackend();
 147 }
 148
 149 void CloudPrintProxy::GetProxyInfo(CloudPrintProxyInfo* info) {
 150   info->enabled = enabled_;
 151   info->email.clear();
 152   if (enabled_)
 153     info->email = user_email();
 154   ConnectorSettings settings;
 155   settings.InitFrom(service_prefs_);
 156   info->proxy_id = settings.proxy_id();
 157 }
 158
 159 void CloudPrintProxy::GetPrinters(std::vector<std::string>* printers) {
 160   ConnectorSettings settings;
 161   settings.InitFrom(service_prefs_);
 162   scoped_refptr<PrintSystem> print_system =
 163       PrintSystem::CreateInstance(settings.print_system_settings());
 164   if (!print_system.get())
 165     return;
 166   PrintSystem::PrintSystemResult result = print_system->Init();
 167   if (!result.succeeded())
 168     return;
 169   printing::PrinterList printer_list;
 170   print_system->EnumeratePrinters(&printer_list);
 171   for (size_t i = 0; i < printer_list.size(); ++i)
 172     printers->push_back(printer_list[i].printer_name);
 173 }
 174
 175 void CloudPrintProxy::OnAuthenticated(
 176     const std::string& robot_oauth_refresh_token,
 177     const std::string& robot_email,
 178     const std::string& user_email) {
 179   DCHECK(CalledOnValidThread());
 180   service_prefs_->SetString(prefs::kCloudPrintRobotRefreshToken,
 181                             robot_oauth_refresh_token);
 182   service_prefs_->SetString(prefs::kCloudPrintRobotEmail,
 183                             robot_email);
 184   // If authenticating from a robot, the user email will be empty.
 185   if (!user_email.empty()) {
 186     user_email_ = user_email;
 187   }
 188   service_prefs_->SetString(prefs::kCloudPrintEmail, user_email_);
 189   enabled_ = true;
 190   DCHECK(!user_email_.empty());
 191   service_prefs_->WritePrefs();
 192   // When this switch used we don't want connector continue running, we just
 193   // need authentication.
 194   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
 195           switches::kCloudPrintSetupProxy)) {
 196     ShutdownBackend();
 197     if (client_) {
 198       client_->OnCloudPrintProxyDisabled(false);
 199     }
 200   }
 201 }
 202
 203 void CloudPrintProxy::OnAuthenticationFailed() {
 204   DCHECK(CalledOnValidThread());
 205   // Don't disable permanently. Could be just connection issue.
 206   ShutdownBackend();
 207   if (client_) {
 208     client_->OnCloudPrintProxyDisabled(false);
 209   }
 210 }
 211
 212 void CloudPrintProxy::OnPrintSystemUnavailable() {
 213   // If the print system is unavailable, we want to shutdown the proxy and
 214   // disable it non-persistently.
 215   ShutdownBackend();
 216   if (client_) {
 217     client_->OnCloudPrintProxyDisabled(false);
 218   }
 219 }
 220
 221 void CloudPrintProxy::OnUnregisterPrinters(
 222     const std::string& auth_token,
 223     const std::list<std::string>& printer_ids) {
 224   UMA_HISTOGRAM_COUNTS_10000("CloudPrint.UnregisterPrinters",
 225                              printer_ids.size());
 226   ShutdownBackend();
 227   ConnectorSettings settings;
 228   settings.InitFrom(service_prefs_);
 229   wipeout_.reset(new CloudPrintWipeout(this, settings.server_url()));
 230   wipeout_->UnregisterPrinters(auth_token, printer_ids);
 231 }
 232
 233 void CloudPrintProxy::OnXmppPingUpdated(int ping_timeout) {
 234   DCHECK(CalledOnValidThread());
 235   service_prefs_->SetInt(prefs::kCloudPrintXmppPingTimeout, ping_timeout);
 236   service_prefs_->WritePrefs();
 237 }
 238
 239 void CloudPrintProxy::OnUnregisterPrintersComplete() {
 240   wipeout_.reset();
 241   // Finish disabling cloud print for this user.
 242   DisableForUser();
 243 }
 244
 245 void CloudPrintProxy::ShutdownBackend() {
 246   DCHECK(CalledOnValidThread());
 247   if (backend_.get())
 248     backend_->Shutdown();
 249   backend_.reset();
 250 }
 251
 252 }  // namespace cloud_print