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// 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 "google_apis/gaia/ubertoken_fetcher.h"
#include <vector>
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/rand_util.h"
#include "base/time/time.h"
#include "google_apis/gaia/gaia_auth_fetcher.h"
#include "google_apis/gaia/gaia_constants.h"
#include "google_apis/gaia/google_service_auth_error.h"
#include "google_apis/gaia/oauth2_token_service.h"
namespace {
GaiaAuthFetcher* CreateGaiaAuthFetcher(
GaiaAuthConsumer* consumer,
const std::string& source,
net::URLRequestContextGetter* request_context) {
return new GaiaAuthFetcher(consumer, source, request_context);
}
}
const int UbertokenFetcher::kMaxRetries = 3;
UbertokenFetcher::UbertokenFetcher(
OAuth2TokenService* token_service,
UbertokenConsumer* consumer,
const std::string& source,
net::URLRequestContextGetter* request_context)
: UbertokenFetcher(token_service,
consumer,
source,
request_context,
base::Bind(CreateGaiaAuthFetcher)) {
}
UbertokenFetcher::UbertokenFetcher(
OAuth2TokenService* token_service,
UbertokenConsumer* consumer,
const std::string& source,
net::URLRequestContextGetter* request_context,
GaiaAuthFetcherFactory factory)
: OAuth2TokenService::Consumer("uber_token_fetcher"),
token_service_(token_service),
consumer_(consumer),
source_(source),
request_context_(request_context),
gaia_auth_fetcher_factory_(factory),
retry_number_(0),
second_access_token_request_(false) {
DCHECK(token_service);
DCHECK(consumer);
DCHECK(request_context);
}
UbertokenFetcher::~UbertokenFetcher() {
}
void UbertokenFetcher::StartFetchingToken(const std::string& account_id) {
DCHECK(!account_id.empty());
account_id_ = account_id;
second_access_token_request_ = false;
RequestAccessToken();
}
void UbertokenFetcher::StartFetchingTokenWithAccessToken(
const std::string& account_id, const std::string& access_token) {
DCHECK(!account_id.empty());
DCHECK(!access_token.empty());
account_id_ = account_id;
access_token_ = access_token;
ExchangeTokens();
}
void UbertokenFetcher::OnUberAuthTokenSuccess(const std::string& token) {
consumer_->OnUbertokenSuccess(token);
}
void UbertokenFetcher::OnUberAuthTokenFailure(
const GoogleServiceAuthError& error) {
// Retry only transient errors.
bool should_retry =
error.state() == GoogleServiceAuthError::CONNECTION_FAILED ||
error.state() == GoogleServiceAuthError::SERVICE_UNAVAILABLE;
if (should_retry) {
if (retry_number_ < kMaxRetries) {
// Calculate an exponential backoff with randomness of less than 1 sec.
double backoff = base::RandDouble() + (1 << retry_number_);
++retry_number_;
UMA_HISTOGRAM_ENUMERATION("Signin.UberTokenRetry",
error.state(), GoogleServiceAuthError::NUM_STATES);
retry_timer_.Stop();
retry_timer_.Start(FROM_HERE,
base::TimeDelta::FromSecondsD(backoff),
this,
&UbertokenFetcher::ExchangeTokens);
return;
}
} else {
// The access token is invalid. Tell the token service.
OAuth2TokenService::ScopeSet scopes;
scopes.insert(GaiaConstants::kOAuth1LoginScope);
token_service_->InvalidateAccessToken(account_id_, scopes, access_token_);
// In case the access was just stale, try one more time.
if (!second_access_token_request_) {
second_access_token_request_ = true;
RequestAccessToken();
return;
}
}
UMA_HISTOGRAM_ENUMERATION("Signin.UberTokenFailure",
error.state(), GoogleServiceAuthError::NUM_STATES);
consumer_->OnUbertokenFailure(error);
}
void UbertokenFetcher::OnGetTokenSuccess(
const OAuth2TokenService::Request* request,
const std::string& access_token,
const base::Time& expiration_time) {
DCHECK(!access_token.empty());
access_token_ = access_token;
access_token_request_.reset();
ExchangeTokens();
}
void UbertokenFetcher::OnGetTokenFailure(
const OAuth2TokenService::Request* request,
const GoogleServiceAuthError& error) {
access_token_request_.reset();
consumer_->OnUbertokenFailure(error);
}
void UbertokenFetcher::RequestAccessToken() {
retry_number_ = 0;
gaia_auth_fetcher_.reset();
retry_timer_.Stop();
OAuth2TokenService::ScopeSet scopes;
scopes.insert(GaiaConstants::kOAuth1LoginScope);
access_token_request_ =
token_service_->StartRequest(account_id_, scopes, this);
}
void UbertokenFetcher::ExchangeTokens() {
gaia_auth_fetcher_.reset(
gaia_auth_fetcher_factory_.Run(this, source_, request_context_));
gaia_auth_fetcher_->StartTokenFetchForUberAuthExchange(access_token_);
}
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