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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/gcm/engine/checkin_request.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/histogram.h"
#include "google_apis/gcm/protocol/checkin.pb.h"
#include "net/http/http_status_code.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request_status.h"
#include "url/gurl.h"
namespace gcm {
namespace {
const char kCheckinURL[] = "https://android.clients.google.com/checkin";
const char kRequestContentType[] = "application/x-protobuf";
const int kRequestVersionValue = 2;
const int kDefaultUserSerialNumber = 0;
// This enum is also used in an UMA histogram (GCMCheckinRequestStatus
// enum defined in tools/metrics/histograms/histogram.xml). Hence the entries
// here shouldn't be deleted or re-ordered and new ones should be added to
// the end.
enum CheckinRequestStatus {
SUCCESS, // Checkin completed successfully.
URL_FETCHING_FAILED, // URL fetching failed.
HTTP_BAD_REQUEST, // The request was malformed.
HTTP_UNAUTHORIZED, // The security token didn't match the android id.
HTTP_NOT_OK, // HTTP status was not OK.
RESPONSE_PARSING_FAILED, // Check in response parsing failed.
ZERO_ID_OR_TOKEN, // Either returned android id or security token
// was zero.
// NOTE: always keep this entry at the end. Add new status types only
// immediately above this line. Make sure to update the corresponding
// histogram enum accordingly.
STATUS_COUNT
};
void RecordCheckinStatusToUMA(CheckinRequestStatus status) {
UMA_HISTOGRAM_ENUMERATION("GCM.CheckinRequestStatus", status, STATUS_COUNT);
}
} // namespace
CheckinRequest::CheckinRequest(
const CheckinRequestCallback& callback,
const net::BackoffEntry::Policy& backoff_policy,
const checkin_proto::ChromeBuildProto& chrome_build_proto,
uint64 android_id,
uint64 security_token,
net::URLRequestContextGetter* request_context_getter)
: request_context_getter_(request_context_getter),
callback_(callback),
backoff_entry_(&backoff_policy),
chrome_build_proto_(chrome_build_proto),
android_id_(android_id),
security_token_(security_token),
weak_ptr_factory_(this) {
}
CheckinRequest::~CheckinRequest() {}
void CheckinRequest::Start() {
DCHECK(!url_fetcher_.get());
checkin_proto::AndroidCheckinRequest request;
request.set_id(android_id_);
request.set_security_token(security_token_);
request.set_user_serial_number(kDefaultUserSerialNumber);
request.set_version(kRequestVersionValue);
checkin_proto::AndroidCheckinProto* checkin = request.mutable_checkin();
checkin->mutable_chrome_build()->CopyFrom(chrome_build_proto_);
#if defined(CHROME_OS)
checkin->set_type(checkin_proto::DEVICE_CHROME_OS);
#else
checkin->set_type(checkin_proto::DEVICE_CHROME_BROWSER);
#endif
std::string upload_data;
CHECK(request.SerializeToString(&upload_data));
url_fetcher_.reset(
net::URLFetcher::Create(GURL(kCheckinURL), net::URLFetcher::POST, this));
url_fetcher_->SetRequestContext(request_context_getter_);
url_fetcher_->SetUploadData(kRequestContentType, upload_data);
url_fetcher_->Start();
}
void CheckinRequest::RetryWithBackoff(bool update_backoff) {
if (update_backoff) {
backoff_entry_.InformOfRequest(false);
url_fetcher_.reset();
}
if (backoff_entry_.ShouldRejectRequest()) {
DVLOG(1) << "Delay GCM checkin for: "
<< backoff_entry_.GetTimeUntilRelease().InMilliseconds()
<< " milliseconds.";
base::MessageLoop::current()->PostDelayedTask(
FROM_HERE,
base::Bind(&CheckinRequest::RetryWithBackoff,
weak_ptr_factory_.GetWeakPtr(),
false),
backoff_entry_.GetTimeUntilRelease());
return;
}
Start();
}
void CheckinRequest::OnURLFetchComplete(const net::URLFetcher* source) {
std::string response_string;
checkin_proto::AndroidCheckinResponse response_proto;
if (!source->GetStatus().is_success()) {
LOG(ERROR) << "Failed to get checkin response. Fetcher failed. Retrying.";
RecordCheckinStatusToUMA(URL_FETCHING_FAILED);
RetryWithBackoff(true);
return;
}
net::HttpStatusCode response_status = static_cast<net::HttpStatusCode>(
source->GetResponseCode());
if (response_status == net::HTTP_BAD_REQUEST ||
response_status == net::HTTP_UNAUTHORIZED) {
// BAD_REQUEST indicates that the request was malformed.
// UNAUTHORIZED indicates that security token didn't match the android id.
LOG(ERROR) << "No point retrying the checkin with status: "
<< response_status << ". Checkin failed.";
RecordCheckinStatusToUMA(response_status == net::HTTP_BAD_REQUEST ?
HTTP_BAD_REQUEST : HTTP_UNAUTHORIZED);
callback_.Run(0,0);
return;
}
if (response_status != net::HTTP_OK ||
!source->GetResponseAsString(&response_string) ||
!response_proto.ParseFromString(response_string)) {
LOG(ERROR) << "Failed to get checkin response. HTTP Status: "
<< response_status << ". Retrying.";
RecordCheckinStatusToUMA(response_status != net::HTTP_OK ?
HTTP_NOT_OK : RESPONSE_PARSING_FAILED);
RetryWithBackoff(true);
return;
}
if (!response_proto.has_android_id() ||
!response_proto.has_security_token() ||
response_proto.android_id() == 0 ||
response_proto.security_token() == 0) {
LOG(ERROR) << "Android ID or security token is 0. Retrying.";
RecordCheckinStatusToUMA(ZERO_ID_OR_TOKEN);
RetryWithBackoff(true);
return;
}
RecordCheckinStatusToUMA(SUCCESS);
callback_.Run(response_proto.android_id(), response_proto.security_token());
}
} // namespace gcm
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