| // 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/unregistration_request.h" |
| |
| #include "base/bind.h" |
| #include "base/message_loop/message_loop.h" |
| #include "base/metrics/histogram.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_piece.h" |
| #include "base/values.h" |
| #include "google_apis/gcm/monitoring/gcm_stats_recorder.h" |
| #include "net/base/escape.h" |
| #include "net/http/http_request_headers.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" |
| |
| namespace gcm { |
| |
| namespace { |
| |
| const char kRequestContentType[] = "application/x-www-form-urlencoded"; |
| |
| // Request constants. |
| const char kAppIdKey[] = "app"; |
| const char kDeleteKey[] = "delete"; |
| const char kDeleteValue[] = "true"; |
| const char kDeviceIdKey[] = "device"; |
| const char kLoginHeader[] = "AidLogin"; |
| const char kUnregistrationCallerKey[] = "gcm_unreg_caller"; |
| // We are going to set the value to "false" in order to forcefully unregister |
| // the application. |
| const char kUnregistrationCallerValue[] = "false"; |
| |
| // Response constants. |
| const char kDeletedPrefix[] = "deleted="; |
| const char kErrorPrefix[] = "Error="; |
| const char kInvalidParameters[] = "INVALID_PARAMETERS"; |
| |
| |
| void BuildFormEncoding(const std::string& key, |
| const std::string& value, |
| std::string* out) { |
| if (!out->empty()) |
| out->append("&"); |
| out->append(key + "=" + net::EscapeUrlEncodedData(value, true)); |
| } |
| |
| UnregistrationRequest::Status ParseFetcherResponse( |
| const net::URLFetcher* source, |
| std::string request_app_id) { |
| if (!source->GetStatus().is_success()) { |
| DVLOG(1) << "Fetcher failed"; |
| return UnregistrationRequest::URL_FETCHING_FAILED; |
| } |
| |
| net::HttpStatusCode response_status = static_cast<net::HttpStatusCode>( |
| source->GetResponseCode()); |
| if (response_status != net::HTTP_OK) { |
| DVLOG(1) << "HTTP Status code is not OK, but: " << response_status; |
| if (response_status == net::HTTP_SERVICE_UNAVAILABLE) |
| return UnregistrationRequest::SERVICE_UNAVAILABLE; |
| else if (response_status == net::HTTP_INTERNAL_SERVER_ERROR) |
| return UnregistrationRequest::INTERNAL_SERVER_ERROR; |
| return UnregistrationRequest::HTTP_NOT_OK; |
| } |
| |
| std::string response; |
| if (!source->GetResponseAsString(&response)) { |
| DVLOG(1) << "Failed to get response body."; |
| return UnregistrationRequest::NO_RESPONSE_BODY; |
| } |
| |
| DVLOG(1) << "Parsing unregistration response."; |
| if (response.find(kDeletedPrefix) != std::string::npos) { |
| std::string app_id = response.substr( |
| response.find(kDeletedPrefix) + arraysize(kDeletedPrefix) - 1); |
| if (app_id == request_app_id) |
| return UnregistrationRequest::SUCCESS; |
| return UnregistrationRequest::INCORRECT_APP_ID; |
| } |
| |
| if (response.find(kErrorPrefix) != std::string::npos) { |
| std::string error = response.substr( |
| response.find(kErrorPrefix) + arraysize(kErrorPrefix) - 1); |
| if (error == kInvalidParameters) |
| return UnregistrationRequest::INVALID_PARAMETERS; |
| return UnregistrationRequest::UNKNOWN_ERROR; |
| } |
| |
| DVLOG(1) << "Not able to parse a meaningful output from response body." |
| << response; |
| return UnregistrationRequest::RESPONSE_PARSING_FAILED; |
| } |
| |
| } // namespace |
| |
| UnregistrationRequest::RequestInfo::RequestInfo( |
| uint64 android_id, |
| uint64 security_token, |
| const std::string& app_id) |
| : android_id(android_id), |
| security_token(security_token), |
| app_id(app_id) { |
| } |
| |
| UnregistrationRequest::RequestInfo::~RequestInfo() {} |
| |
| UnregistrationRequest::UnregistrationRequest( |
| const GURL& registration_url, |
| const RequestInfo& request_info, |
| const net::BackoffEntry::Policy& backoff_policy, |
| const UnregistrationCallback& callback, |
| scoped_refptr<net::URLRequestContextGetter> request_context_getter, |
| GCMStatsRecorder* recorder) |
| : callback_(callback), |
| request_info_(request_info), |
| registration_url_(registration_url), |
| backoff_entry_(&backoff_policy), |
| request_context_getter_(request_context_getter), |
| recorder_(recorder), |
| weak_ptr_factory_(this) { |
| } |
| |
| UnregistrationRequest::~UnregistrationRequest() {} |
| |
| void UnregistrationRequest::Start() { |
| DCHECK(!callback_.is_null()); |
| DCHECK(request_info_.android_id != 0UL); |
| DCHECK(request_info_.security_token != 0UL); |
| DCHECK(!url_fetcher_.get()); |
| |
| url_fetcher_.reset(net::URLFetcher::Create( |
| registration_url_, net::URLFetcher::POST, this)); |
| url_fetcher_->SetRequestContext(request_context_getter_); |
| |
| std::string android_id = base::Uint64ToString(request_info_.android_id); |
| std::string auth_header = |
| std::string(kLoginHeader) + " " + android_id + ":" + |
| base::Uint64ToString(request_info_.security_token); |
| net::HttpRequestHeaders headers; |
| headers.SetHeader(net::HttpRequestHeaders::kAuthorization, auth_header); |
| headers.SetHeader(kAppIdKey, request_info_.app_id); |
| url_fetcher_->SetExtraRequestHeaders(headers.ToString()); |
| |
| std::string body; |
| BuildFormEncoding(kAppIdKey, request_info_.app_id, &body); |
| BuildFormEncoding(kDeviceIdKey, android_id, &body); |
| BuildFormEncoding(kDeleteKey, kDeleteValue, &body); |
| BuildFormEncoding(kUnregistrationCallerKey, |
| kUnregistrationCallerValue, |
| &body); |
| |
| DVLOG(1) << "Unregistration request: " << body; |
| url_fetcher_->SetUploadData(kRequestContentType, body); |
| |
| DVLOG(1) << "Performing unregistration for: " << request_info_.app_id; |
| recorder_->RecordUnregistrationSent(request_info_.app_id); |
| request_start_time_ = base::TimeTicks::Now(); |
| url_fetcher_->Start(); |
| } |
| |
| void UnregistrationRequest::RetryWithBackoff(bool update_backoff) { |
| if (update_backoff) { |
| url_fetcher_.reset(); |
| backoff_entry_.InformOfRequest(false); |
| } |
| |
| if (backoff_entry_.ShouldRejectRequest()) { |
| DVLOG(1) << "Delaying GCM unregistration of app: " |
| << request_info_.app_id << ", for " |
| << backoff_entry_.GetTimeUntilRelease().InMilliseconds() |
| << " milliseconds."; |
| recorder_->RecordUnregistrationRetryDelayed( |
| request_info_.app_id, |
| backoff_entry_.GetTimeUntilRelease().InMilliseconds()); |
| base::MessageLoop::current()->PostDelayedTask( |
| FROM_HERE, |
| base::Bind(&UnregistrationRequest::RetryWithBackoff, |
| weak_ptr_factory_.GetWeakPtr(), |
| false), |
| backoff_entry_.GetTimeUntilRelease()); |
| return; |
| } |
| |
| Start(); |
| } |
| |
| void UnregistrationRequest::OnURLFetchComplete(const net::URLFetcher* source) { |
| UnregistrationRequest::Status status = |
| ParseFetcherResponse(source, request_info_.app_id); |
| |
| DVLOG(1) << "UnregistrationRequestStauts: " << status; |
| UMA_HISTOGRAM_ENUMERATION("GCM.UnregistrationRequestStatus", |
| status, |
| UNREGISTRATION_STATUS_COUNT); |
| recorder_->RecordUnregistrationResponse(request_info_.app_id, status); |
| |
| if (status == URL_FETCHING_FAILED || |
| status == SERVICE_UNAVAILABLE || |
| status == INTERNAL_SERVER_ERROR || |
| status == INCORRECT_APP_ID || |
| status == RESPONSE_PARSING_FAILED) { |
| RetryWithBackoff(true); |
| return; |
| } |
| |
| // status == SUCCESS || HTTP_NOT_OK || NO_RESPONSE_BODY || |
| // INVALID_PARAMETERS || UNKNOWN_ERROR |
| |
| if (status == SUCCESS) { |
| UMA_HISTOGRAM_COUNTS("GCM.UnregistrationRetryCount", |
| backoff_entry_.failure_count()); |
| UMA_HISTOGRAM_TIMES("GCM.UnregistrationCompleteTime", |
| base::TimeTicks::Now() - request_start_time_); |
| } |
| |
| callback_.Run(status); |
| } |
| |
| } // namespace gcm |