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// Copyright (c) 2011 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 "chrome/common/net/gaia/gaia_oauth_client.h"
#include "base/json/json_reader.h"
#include "base/memory/scoped_ptr.h"
#include "base/values.h"
#include "chrome/common/net/http_return.h"
#include "content/public/common/url_fetcher.h"
#include "content/public/common/url_fetcher_delegate.h"
#include "googleurl/src/gurl.h"
#include "net/base/escape.h"
#include "net/url_request/url_request_context_getter.h"
namespace {
const char kAccessTokenValue[] = "access_token";
const char kRefreshTokenValue[] = "refresh_token";
const char kExpiresInValue[] = "expires_in";
}
namespace gaia {
class GaiaOAuthClient::Core
: public base::RefCountedThreadSafe<GaiaOAuthClient::Core>,
public content::URLFetcherDelegate {
public:
Core(const std::string& gaia_url,
net::URLRequestContextGetter* request_context_getter)
: gaia_url_(gaia_url),
num_retries_(0),
request_context_getter_(request_context_getter),
delegate_(NULL) {}
virtual ~Core() { }
void GetTokensFromAuthCode(const OAuthClientInfo& oauth_client_info,
const std::string& auth_code,
int max_retries,
GaiaOAuthClient::Delegate* delegate);
void RefreshToken(const OAuthClientInfo& oauth_client_info,
const std::string& refresh_token,
int max_retries,
GaiaOAuthClient::Delegate* delegate);
// content::URLFetcherDelegate implementation.
virtual void OnURLFetchComplete(const content::URLFetcher* source);
private:
void MakeGaiaRequest(std::string post_body,
int max_retries,
GaiaOAuthClient::Delegate* delegate);
void HandleResponse(const content::URLFetcher* source,
bool* should_retry_request);
GURL gaia_url_;
int num_retries_;
scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
GaiaOAuthClient::Delegate* delegate_;
scoped_ptr<content::URLFetcher> request_;
};
void GaiaOAuthClient::Core::GetTokensFromAuthCode(
const OAuthClientInfo& oauth_client_info,
const std::string& auth_code,
int max_retries,
GaiaOAuthClient::Delegate* delegate) {
std::string post_body =
"code=" + net::EscapeUrlEncodedData(auth_code, true) +
"&client_id=" + net::EscapeUrlEncodedData(oauth_client_info.client_id,
true) +
"&client_secret=" +
net::EscapeUrlEncodedData(oauth_client_info.client_secret, true) +
"&redirect_uri=oob&grant_type=authorization_code";
MakeGaiaRequest(post_body, max_retries, delegate);
}
void GaiaOAuthClient::Core::RefreshToken(
const OAuthClientInfo& oauth_client_info,
const std::string& refresh_token,
int max_retries,
GaiaOAuthClient::Delegate* delegate) {
std::string post_body =
"refresh_token=" + net::EscapeUrlEncodedData(refresh_token, true) +
"&client_id=" + net::EscapeUrlEncodedData(oauth_client_info.client_id,
true) +
"&client_secret=" +
net::EscapeUrlEncodedData(oauth_client_info.client_secret, true) +
"&grant_type=refresh_token";
MakeGaiaRequest(post_body, max_retries, delegate);
}
void GaiaOAuthClient::Core::MakeGaiaRequest(
std::string post_body,
int max_retries,
GaiaOAuthClient::Delegate* delegate) {
DCHECK(!request_.get()) << "Tried to fetch two things at once!";
delegate_ = delegate;
num_retries_ = 0;
request_.reset(content::URLFetcher::Create(
0, gaia_url_, content::URLFetcher::POST, this));
request_->SetRequestContext(request_context_getter_);
request_->SetUploadData("application/x-www-form-urlencoded", post_body);
request_->SetMaxRetries(max_retries);
request_->Start();
}
// URLFetcher::Delegate implementation.
void GaiaOAuthClient::Core::OnURLFetchComplete(
const content::URLFetcher* source) {
bool should_retry = false;
HandleResponse(source, &should_retry);
if (should_retry) {
// Explicitly call ReceivedContentWasMalformed() to ensure the current
// request gets counted as a failure for calculation of the back-off
// period. If it was already a failure by status code, this call will
// be ignored.
request_->ReceivedContentWasMalformed();
num_retries_++;
// We must set our request_context_getter_ again because
// URLFetcher::Core::RetryOrCompleteUrlFetch resets it to NULL...
request_->SetRequestContext(request_context_getter_);
request_->Start();
} else {
request_.reset();
}
}
void GaiaOAuthClient::Core::HandleResponse(
const content::URLFetcher* source,
bool* should_retry_request) {
*should_retry_request = false;
// RC_BAD_REQUEST means the arguments are invalid. No point retrying. We are
// done here.
if (source->GetResponseCode() == RC_BAD_REQUEST) {
delegate_->OnOAuthError();
return;
}
std::string access_token;
std::string refresh_token;
int expires_in_seconds = 0;
if (source->GetResponseCode() == RC_REQUEST_OK) {
std::string data;
source->GetResponseAsString(&data);
scoped_ptr<Value> message_value(base::JSONReader::Read(data, false));
if (message_value.get() &&
message_value->IsType(Value::TYPE_DICTIONARY)) {
scoped_ptr<DictionaryValue> response_dict(
static_cast<DictionaryValue*>(message_value.release()));
response_dict->GetString(kAccessTokenValue, &access_token);
response_dict->GetString(kRefreshTokenValue, &refresh_token);
response_dict->GetInteger(kExpiresInValue, &expires_in_seconds);
}
}
if (access_token.empty()) {
// If we don't have an access token yet and the the error was not
// RC_BAD_REQUEST, we may need to retry.
if ((-1 != source->GetMaxRetries()) &&
(num_retries_ > source->GetMaxRetries())) {
// Retry limit reached. Give up.
delegate_->OnNetworkError(source->GetResponseCode());
} else {
*should_retry_request = true;
}
} else if (refresh_token.empty()) {
// If we only have an access token, then this was a refresh request.
delegate_->OnRefreshTokenResponse(access_token, expires_in_seconds);
} else {
delegate_->OnGetTokensResponse(refresh_token,
access_token,
expires_in_seconds);
}
}
GaiaOAuthClient::GaiaOAuthClient(const std::string& gaia_url,
net::URLRequestContextGetter* context_getter) {
core_ = new Core(gaia_url, context_getter);
}
GaiaOAuthClient::~GaiaOAuthClient() {
}
void GaiaOAuthClient::GetTokensFromAuthCode(
const OAuthClientInfo& oauth_client_info,
const std::string& auth_code,
int max_retries,
Delegate* delegate) {
return core_->GetTokensFromAuthCode(oauth_client_info,
auth_code,
max_retries,
delegate);
}
void GaiaOAuthClient::RefreshToken(const OAuthClientInfo& oauth_client_info,
const std::string& refresh_token,
int max_retries,
Delegate* delegate) {
return core_->RefreshToken(oauth_client_info,
refresh_token,
max_retries,
delegate);
}
} // namespace gaia
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