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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/unregistration_request.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/values.h"
#include "google_apis/gcm/base/gcm_util.h"
#include "google_apis/gcm/monitoring/gcm_stats_recorder.h"
#include "net/base/escape.h"
#include "net/base/load_flags.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";
} // 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) {
DCHECK(android_id != 0UL);
DCHECK(security_token != 0UL);
}
UnregistrationRequest::RequestInfo::~RequestInfo() {}
UnregistrationRequest::CustomRequestHandler::CustomRequestHandler() {}
UnregistrationRequest::CustomRequestHandler::~CustomRequestHandler() {}
UnregistrationRequest::UnregistrationRequest(
const GURL& registration_url,
const RequestInfo& request_info,
scoped_ptr<CustomRequestHandler> custom_request_handler,
const net::BackoffEntry::Policy& backoff_policy,
const UnregistrationCallback& callback,
int max_retry_count,
scoped_refptr<net::URLRequestContextGetter> request_context_getter,
GCMStatsRecorder* recorder,
const std::string& source_to_record)
: callback_(callback),
request_info_(request_info),
custom_request_handler_(custom_request_handler.Pass()),
registration_url_(registration_url),
backoff_entry_(&backoff_policy),
request_context_getter_(request_context_getter),
retries_left_(max_retry_count),
recorder_(recorder),
source_to_record_(source_to_record),
weak_ptr_factory_(this) {
DCHECK_GE(max_retry_count, 0);
}
UnregistrationRequest::~UnregistrationRequest() {}
void UnregistrationRequest::Start() {
DCHECK(!callback_.is_null());
DCHECK(!url_fetcher_.get());
url_fetcher_ =
net::URLFetcher::Create(registration_url_, net::URLFetcher::POST, this);
url_fetcher_->SetRequestContext(request_context_getter_.get());
url_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
net::LOAD_DO_NOT_SAVE_COOKIES);
std::string extra_headers;
BuildRequestHeaders(&extra_headers);
url_fetcher_->SetExtraRequestHeaders(extra_headers);
std::string body;
BuildRequestBody(&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, source_to_record_);
request_start_time_ = base::TimeTicks::Now();
url_fetcher_->Start();
}
void UnregistrationRequest::BuildRequestHeaders(std::string* extra_headers) {
net::HttpRequestHeaders headers;
headers.SetHeader(
net::HttpRequestHeaders::kAuthorization,
std::string(kLoginHeader) + " " +
base::Uint64ToString(request_info_.android_id) + ":" +
base::Uint64ToString(request_info_.security_token));
headers.SetHeader(kAppIdKey, request_info_.app_id);
*extra_headers = headers.ToString();
}
void UnregistrationRequest::BuildRequestBody(std::string* body) {
BuildFormEncoding(kAppIdKey, request_info_.app_id, body);
BuildFormEncoding(kDeviceIdKey,
base::Uint64ToString(request_info_.android_id),
body);
BuildFormEncoding(kDeleteKey, kDeleteValue, body);
DCHECK(custom_request_handler_.get());
custom_request_handler_->BuildRequestBody(body);
}
UnregistrationRequest::Status UnregistrationRequest::ParseResponse(
const net::URLFetcher* source) {
if (!source->GetStatus().is_success()) {
DVLOG(1) << "Fetcher failed";
return 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 SERVICE_UNAVAILABLE;
if (response_status == net::HTTP_INTERNAL_SERVER_ERROR)
return INTERNAL_SERVER_ERROR;
return HTTP_NOT_OK;
}
DCHECK(custom_request_handler_.get());
return custom_request_handler_->ParseResponse(source);
}
void UnregistrationRequest::RetryWithBackoff(bool update_backoff) {
if (update_backoff) {
DCHECK_GT(retries_left_, 0);
--retries_left_;
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,
source_to_record_,
backoff_entry_.GetTimeUntilRelease().InMilliseconds(),
retries_left_ + 1);
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 = ParseResponse(source);
DVLOG(1) << "UnregistrationRequestStauts: " << status;
DCHECK(custom_request_handler_.get());
custom_request_handler_->ReportUMAs(
status,
backoff_entry_.failure_count(),
base::TimeTicks::Now() - request_start_time_);
recorder_->RecordUnregistrationResponse(
request_info_.app_id, source_to_record_, status);
if (status == URL_FETCHING_FAILED ||
status == HTTP_NOT_OK ||
status == NO_RESPONSE_BODY ||
status == SERVICE_UNAVAILABLE ||
status == INTERNAL_SERVER_ERROR ||
status == INCORRECT_APP_ID ||
status == RESPONSE_PARSING_FAILED) {
if (retries_left_ > 0) {
RetryWithBackoff(true);
return;
}
status = REACHED_MAX_RETRIES;
recorder_->RecordUnregistrationResponse(
request_info_.app_id, source_to_record_, status);
// Only REACHED_MAX_RETRIES is reported because the function will skip
// reporting count and time when status is not SUCCESS.
DCHECK(custom_request_handler_.get());
custom_request_handler_->ReportUMAs(status, 0, base::TimeDelta());
}
// status == SUCCESS || INVALID_PARAMETERS || UNKNOWN_ERROR ||
// REACHED_MAX_RETRIES
callback_.Run(status);
}
} // namespace gcm
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