| // 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 "components/gcm_driver/gcm_channel_status_request.h" |
| |
| #include "base/bind.h" |
| #include "base/location.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "components/data_use_measurement/core/data_use_user_data.h" |
| #include "components/gcm_driver/gcm_backoff_policy.h" |
| #include "components/sync/protocol/experiment_status.pb.h" |
| #include "net/base/escape.h" |
| #include "net/base/load_flags.h" |
| #include "net/http/http_status_code.h" |
| #include "net/traffic_annotation/network_traffic_annotation.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 kRequestContentType[] = "application/octet-stream"; |
| const char kGCMChannelTag[] = "gcm_channel"; |
| const int kDefaultPollIntervalSeconds = 60 * 60; // 60 minutes. |
| const int kMinPollIntervalSeconds = 30 * 60; // 30 minutes. |
| |
| } // namespace |
| |
| GCMChannelStatusRequest::GCMChannelStatusRequest( |
| const scoped_refptr<net::URLRequestContextGetter>& request_context_getter, |
| const std::string& channel_status_request_url, |
| const std::string& user_agent, |
| const GCMChannelStatusRequestCallback& callback) |
| : request_context_getter_(request_context_getter), |
| channel_status_request_url_(channel_status_request_url), |
| user_agent_(user_agent), |
| callback_(callback), |
| backoff_entry_(&(GetGCMBackoffPolicy())), |
| weak_ptr_factory_(this) { |
| } |
| |
| GCMChannelStatusRequest::~GCMChannelStatusRequest() { |
| } |
| |
| // static |
| int GCMChannelStatusRequest::default_poll_interval_seconds() { |
| return kDefaultPollIntervalSeconds; |
| } |
| |
| // static |
| int GCMChannelStatusRequest::min_poll_interval_seconds() { |
| return kMinPollIntervalSeconds; |
| } |
| |
| void GCMChannelStatusRequest::Start() { |
| DCHECK(!url_fetcher_.get()); |
| |
| GURL request_url(channel_status_request_url_); |
| |
| sync_pb::ExperimentStatusRequest proto_data; |
| proto_data.add_experiment_name(kGCMChannelTag); |
| std::string upload_data; |
| if (!proto_data.SerializeToString(&upload_data)) { |
| NOTREACHED(); |
| } |
| |
| net::NetworkTrafficAnnotationTag traffic_annotation = |
| net::DefineNetworkTrafficAnnotation("gcm_channel_status_request", R"( |
| semantics { |
| sender: "GCM Driver" |
| description: |
| "Google Chrome interacts with Google Cloud Messaging to receive " |
| "push messages for various browser features, as well as on behalf " |
| "of websites and extensions. The channel status request " |
| "periodically confirms with Google servers whether the feature " |
| "should be enabled." |
| trigger: |
| "Periodically when Chrome has established an active Google Cloud " |
| "Messaging subscription. The first request will be issued a minute " |
| "after the first subscription activates. Subsequent requests will " |
| "be issued each hour with a jitter of 15 minutes. Google can " |
| "adjust this interval when it deems necessary." |
| data: |
| "A user agent string containing the Chrome version, channel and " |
| "platform will be sent to the server. No user identifier is sent " |
| "along with the request." |
| destination: GOOGLE_OWNED_SERVICE |
| } |
| policy { |
| cookies_allowed: false |
| setting: |
| "Support for interacting with Google Cloud Messaging is enabled by " |
| "default, and there is no configuration option to completely " |
| "disable it. Websites wishing to receive push messages must " |
| "acquire express permission from the user for the 'Notification' " |
| "permission." |
| policy_exception_justification: |
| "Not implemented, considered not useful." |
| })"); |
| |
| url_fetcher_ = net::URLFetcher::Create(request_url, net::URLFetcher::POST, |
| this, traffic_annotation); |
| data_use_measurement::DataUseUserData::AttachToFetcher( |
| url_fetcher_.get(), data_use_measurement::DataUseUserData::GCM_DRIVER); |
| url_fetcher_->SetRequestContext(request_context_getter_.get()); |
| url_fetcher_->AddExtraRequestHeader("User-Agent: " + user_agent_); |
| url_fetcher_->SetUploadData(kRequestContentType, upload_data); |
| url_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES | |
| net::LOAD_DO_NOT_SAVE_COOKIES); |
| url_fetcher_->Start(); |
| } |
| |
| void GCMChannelStatusRequest::OnURLFetchComplete( |
| const net::URLFetcher* source) { |
| if (ParseResponse(source)) |
| return; |
| |
| RetryWithBackoff(true); |
| } |
| |
| bool GCMChannelStatusRequest::ParseResponse(const net::URLFetcher* source) { |
| if (!source->GetStatus().is_success()) { |
| LOG(ERROR) << "GCM channel request failed."; |
| return false; |
| } |
| |
| if (source->GetResponseCode() != net::HTTP_OK) { |
| LOG(ERROR) << "GCM channel request failed. HTTP status: " |
| << source->GetResponseCode(); |
| return false; |
| } |
| |
| std::string response_string; |
| if (!source->GetResponseAsString(&response_string)) { |
| LOG(ERROR) << "GCM channel response failed to be retrieved."; |
| return false; |
| } |
| |
| // Empty response means to keep the existing values. |
| if (response_string.empty()) { |
| callback_.Run(false, false, 0); |
| return true; |
| } |
| |
| sync_pb::ExperimentStatusResponse response_proto; |
| if (!response_proto.ParseFromString(response_string)) { |
| LOG(ERROR) << "GCM channel response failed to be parsed as proto."; |
| return false; |
| } |
| |
| bool enabled = true; |
| if (response_proto.experiment_size() == 1 && |
| response_proto.experiment(0).has_gcm_channel() && |
| response_proto.experiment(0).gcm_channel().has_enabled()) { |
| enabled = response_proto.experiment(0).gcm_channel().enabled(); |
| } |
| |
| int poll_interval_seconds; |
| if (response_proto.has_poll_interval_seconds()) |
| poll_interval_seconds = response_proto.poll_interval_seconds(); |
| else |
| poll_interval_seconds = kDefaultPollIntervalSeconds; |
| if (poll_interval_seconds < kMinPollIntervalSeconds) |
| poll_interval_seconds = kMinPollIntervalSeconds; |
| |
| callback_.Run(true, enabled, poll_interval_seconds); |
| |
| return true; |
| } |
| |
| void GCMChannelStatusRequest::RetryWithBackoff(bool update_backoff) { |
| if (update_backoff) { |
| url_fetcher_.reset(); |
| backoff_entry_.InformOfRequest(false); |
| } |
| |
| if (backoff_entry_.ShouldRejectRequest()) { |
| DVLOG(1) << "Delaying GCM channel request for " |
| << backoff_entry_.GetTimeUntilRelease().InMilliseconds() |
| << " ms."; |
| base::ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, base::Bind(&GCMChannelStatusRequest::RetryWithBackoff, |
| weak_ptr_factory_.GetWeakPtr(), false), |
| backoff_entry_.GetTimeUntilRelease()); |
| return; |
| } |
| |
| Start(); |
| } |
| |
| } // namespace gcm |