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// Copyright (c) 2012 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/oauth2_revocation_fetcher.h"
#include <algorithm>
#include <string>
#include <vector>
#include "base/json/json_reader.h"
#include "base/string_util.h"
#include "base/stringprintf.h"
#include "base/values.h"
#include "google_apis/gaia/gaia_urls.h"
#include "google_apis/gaia/google_service_auth_error.h"
#include "net/base/escape.h"
#include "net/base/load_flags.h"
#include "net/http/http_status_code.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request_context_getter.h"
#include "net/url_request/url_request_status.h"
using net::ResponseCookies;
using net::URLFetcher;
using net::URLFetcherDelegate;
using net::URLRequestContextGetter;
using net::URLRequestStatus;
namespace {
static const char kOAuth2RevokeTokenURL[] =
"https://www.googleapis.com/oauth2/v2/RevokeToken";
static const char kAuthorizationHeaderFormat[] =
"Authorization: Bearer %s";
static const char kRevocationBodyFormat[] =
"client_id=%s&origin=%s";
static GoogleServiceAuthError CreateAuthError(URLRequestStatus status) {
CHECK(!status.is_success());
if (status.status() == URLRequestStatus::CANCELED) {
return GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED);
} else {
DLOG(WARNING) << "Could not reach Google Accounts servers: errno "
<< status.error();
return GoogleServiceAuthError::FromConnectionError(status.error());
}
}
static URLFetcher* CreateFetcher(URLRequestContextGetter* getter,
const GURL& url,
const std::string& header,
const std::string& body,
URLFetcherDelegate* delegate) {
bool empty_body = body.empty();
URLFetcher* result = net::URLFetcher::Create(
0, url,
empty_body ? URLFetcher::GET : URLFetcher::POST,
delegate);
result->SetRequestContext(getter);
result->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
net::LOAD_DO_NOT_SAVE_COOKIES);
// Fetchers are sometimes cancelled because a network change was detected,
// especially at startup and after sign-in on ChromeOS. Retrying once should
// be enough in those cases; let the fetcher retry up to 3 times just in case.
// http://crbug.com/163710
result->SetAutomaticallyRetryOnNetworkChanges(3);
if (!header.empty())
result->SetExtraRequestHeaders(header);
if (!empty_body)
result->SetUploadData("application/x-www-form-urlencoded", body);
return result;
}
} // namespace
OAuth2RevocationFetcher::OAuth2RevocationFetcher(
OAuth2RevocationConsumer* consumer,
URLRequestContextGetter* getter)
: consumer_(consumer),
getter_(getter),
state_(INITIAL) { }
OAuth2RevocationFetcher::~OAuth2RevocationFetcher() { }
void OAuth2RevocationFetcher::CancelRequest() {
fetcher_.reset();
}
void OAuth2RevocationFetcher::Start(const std::string& access_token,
const std::string& client_id,
const std::string& origin) {
access_token_ = access_token;
client_id_ = client_id;
origin_ = origin;
StartRevocation();
}
void OAuth2RevocationFetcher::StartRevocation() {
CHECK_EQ(INITIAL, state_);
state_ = REVOCATION_STARTED;
fetcher_.reset(CreateFetcher(
getter_,
MakeRevocationUrl(),
MakeRevocationHeader(access_token_),
MakeRevocationBody(client_id_, origin_),
this));
fetcher_->Start(); // OnURLFetchComplete will be called.
}
void OAuth2RevocationFetcher::EndRevocation(const net::URLFetcher* source) {
CHECK_EQ(REVOCATION_STARTED, state_);
state_ = REVOCATION_DONE;
URLRequestStatus status = source->GetStatus();
if (!status.is_success()) {
OnRevocationFailure(CreateAuthError(status));
return;
}
if (source->GetResponseCode() != net::HTTP_NO_CONTENT) {
OnRevocationFailure(GoogleServiceAuthError(
GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS));
return;
}
OnRevocationSuccess();
}
void OAuth2RevocationFetcher::OnRevocationSuccess() {
consumer_->OnRevocationSuccess();
}
void OAuth2RevocationFetcher::OnRevocationFailure(
const GoogleServiceAuthError& error) {
state_ = ERROR_STATE;
consumer_->OnRevocationFailure(error);
}
void OAuth2RevocationFetcher::OnURLFetchComplete(
const net::URLFetcher* source) {
CHECK(source);
EndRevocation(source);
}
// static
GURL OAuth2RevocationFetcher::MakeRevocationUrl() {
return GURL(kOAuth2RevokeTokenURL);
}
// static
std::string OAuth2RevocationFetcher::MakeRevocationHeader(
const std::string& access_token) {
return StringPrintf(kAuthorizationHeaderFormat, access_token.c_str());
}
// static
std::string OAuth2RevocationFetcher::MakeRevocationBody(
const std::string& client_id,
const std::string& origin) {
std::string enc_client_id = net::EscapeUrlEncodedData(client_id, true);
std::string enc_origin = net::EscapeUrlEncodedData(origin, true);
return StringPrintf(
kRevocationBodyFormat,
enc_client_id.c_str(),
enc_origin.c_str());
}
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