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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 "remoting/host/oauth_token_getter.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/strings/string_util.h"
#include "google_apis/google_api_keys.h"
#include "net/url_request/url_request_context_getter.h"
#include "remoting/base/logging.h"
namespace remoting {
namespace {
// Maximum number of retries on network/500 errors.
const int kMaxRetries = 3;
// Time when we we try to update OAuth token before its expiration.
const int kTokenUpdateTimeBeforeExpirySeconds = 60;
} // namespace
OAuthTokenGetter::OAuthCredentials::OAuthCredentials(
const std::string& login,
const std::string& refresh_token,
bool is_service_account)
: login(login),
refresh_token(refresh_token),
is_service_account(is_service_account) {
}
OAuthTokenGetter::OAuthTokenGetter(
scoped_ptr<OAuthCredentials> oauth_credentials,
scoped_refptr<net::URLRequestContextGetter> url_request_context_getter)
: oauth_credentials_(oauth_credentials.Pass()),
gaia_oauth_client_(
new gaia::GaiaOAuthClient(url_request_context_getter)),
url_request_context_getter_(url_request_context_getter),
refreshing_oauth_token_(false) {
}
OAuthTokenGetter::~OAuthTokenGetter() {}
void OAuthTokenGetter::OnGetTokensResponse(const std::string& user_email,
const std::string& access_token,
int expires_seconds) {
NOTREACHED();
}
void OAuthTokenGetter::OnRefreshTokenResponse(
const std::string& access_token,
int expires_seconds) {
DCHECK(CalledOnValidThread());
DCHECK(oauth_credentials_.get());
HOST_LOG << "Received OAuth token.";
oauth_access_token_ = access_token;
auth_token_expiry_time_ = base::Time::Now() +
base::TimeDelta::FromSeconds(expires_seconds) -
base::TimeDelta::FromSeconds(kTokenUpdateTimeBeforeExpirySeconds);
gaia_oauth_client_->GetUserEmail(access_token, kMaxRetries, this);
}
void OAuthTokenGetter::OnGetUserEmailResponse(const std::string& user_email) {
DCHECK(CalledOnValidThread());
DCHECK(oauth_credentials_.get());
HOST_LOG << "Received user info.";
if (user_email != oauth_credentials_->login) {
LOG(ERROR) << "OAuth token and email address do not refer to "
"the same account.";
OnOAuthError();
return;
}
refreshing_oauth_token_ = false;
// Now that we've refreshed the token and verified that it's for the correct
// user account, try to connect using the new token.
NotifyCallbacks(OAuthTokenGetter::SUCCESS, user_email, oauth_access_token_);
}
void OAuthTokenGetter::NotifyCallbacks(Status status,
const std::string& user_email,
const std::string& access_token) {
std::queue<TokenCallback> callbacks(pending_callbacks_);
pending_callbacks_ = std::queue<TokenCallback>();
while (!callbacks.empty()) {
callbacks.front().Run(status, user_email, access_token);
callbacks.pop();
}
}
void OAuthTokenGetter::OnOAuthError() {
DCHECK(CalledOnValidThread());
LOG(ERROR) << "OAuth: invalid credentials.";
refreshing_oauth_token_ = false;
NotifyCallbacks(OAuthTokenGetter::AUTH_ERROR, std::string(), std::string());
}
void OAuthTokenGetter::OnNetworkError(int response_code) {
DCHECK(CalledOnValidThread());
LOG(ERROR) << "Network error when trying to update OAuth token: "
<< response_code;
refreshing_oauth_token_ = false;
NotifyCallbacks(
OAuthTokenGetter::NETWORK_ERROR, std::string(), std::string());
}
void OAuthTokenGetter::CallWithToken(const TokenCallback& on_access_token) {
DCHECK(CalledOnValidThread());
bool need_new_auth_token = oauth_credentials_.get() &&
(auth_token_expiry_time_.is_null() ||
base::Time::Now() >= auth_token_expiry_time_);
if (need_new_auth_token) {
pending_callbacks_.push(on_access_token);
if (!refreshing_oauth_token_)
RefreshOAuthToken();
} else {
on_access_token.Run(
SUCCESS, oauth_credentials_->login, oauth_access_token_);
}
}
void OAuthTokenGetter::RefreshOAuthToken() {
DCHECK(CalledOnValidThread());
HOST_LOG << "Refreshing OAuth token.";
DCHECK(!refreshing_oauth_token_);
// Service accounts use different API keys, as they use the client app flow.
google_apis::OAuth2Client oauth2_client =
oauth_credentials_->is_service_account ?
google_apis::CLIENT_REMOTING_HOST : google_apis::CLIENT_REMOTING;
gaia::OAuthClientInfo client_info = {
google_apis::GetOAuth2ClientID(oauth2_client),
google_apis::GetOAuth2ClientSecret(oauth2_client),
// Redirect URL is only used when getting tokens from auth code. It
// is not required when getting access tokens.
""
};
refreshing_oauth_token_ = true;
std::vector<std::string> empty_scope_list; // Use scope from refresh token.
gaia_oauth_client_->RefreshToken(
client_info, oauth_credentials_->refresh_token, empty_scope_list,
kMaxRetries, this);
}
} // namespace remoting
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