chrome/browser/extensions/token_cache/token_cache_service.cc

   1 // Copyright (c) 2013 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/extensions/token_cache/token_cache_service.h"
   6
   7 #include "base/logging.h"
   8 #include "chrome/browser/chrome_notification_types.h"
   9 #include "content/public/browser/notification_source.h"
  10
  11 using base::Time;
  12 using base::TimeDelta;
  13
  14 namespace extensions {
  15
  16 TokenCacheService::TokenCacheService(Profile* profile) : profile_(profile) {
  17   registrar_.Add(this,
  18                  chrome::NOTIFICATION_GOOGLE_SIGNED_OUT,
  19                  content::Source<Profile>(profile_));
  20 }
  21
  22 TokenCacheService::~TokenCacheService() {
  23 }
  24
  25 void TokenCacheService::StoreToken(const std::string& token_name,
  26                                    const std::string& token_value,
  27                                    base::TimeDelta time_to_live) {
  28   TokenCacheData token_data;
  29
  30   // Get the current time, and make sure that the token has not already expired.
  31   Time expiration_time;
  32   TimeDelta zero_delta;
  33
  34   // Negative time deltas are meaningless to this function.
  35   DCHECK(time_to_live >= zero_delta);
  36
  37   if (zero_delta < time_to_live) {
  38     expiration_time = Time::Now();
  39     expiration_time += time_to_live;
  40   }
  41
  42   token_data.token = token_value;
  43   token_data.expiration_time = expiration_time;
  44
  45   // Add the token to our cache, overwriting any existing token with this name.
  46   token_cache_[token_name] = token_data;
  47 }
  48
  49 // Retrieve a token for the currently logged in user.  This returns an empty
  50 // string if the token was not found or timed out.
  51 std::string TokenCacheService::RetrieveToken(const std::string& token_name) {
  52   std::map<std::string, TokenCacheData>::iterator it =
  53       token_cache_.find(token_name);
  54
  55   if (it != token_cache_.end()) {
  56     Time now = Time::Now();
  57     if (it->second.expiration_time.is_null() ||
  58         now < it->second.expiration_time) {
  59       return it->second.token;
  60     } else {
  61       // Remove this entry if it is expired.
  62       token_cache_.erase(it);
  63       return std::string();
  64     }
  65   }
  66
  67   return std::string();
  68 }
  69
  70 // Inherited from NotificationObserver.
  71 void TokenCacheService::Observe(int type,
  72                                 const content::NotificationSource& source,
  73                                 const content::NotificationDetails& details)  {
  74   DCHECK(chrome::NOTIFICATION_GOOGLE_SIGNED_OUT == type);
  75   token_cache_.clear();
  76 }
  77
  78 }  // namespace extensions