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telemetry_log_writer.cc
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telemetry_log_writer.cc
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// Copyright 2016 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 "remoting/base/telemetry_log_writer.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/json/json_string_value_serializer.h"
#include "base/logging.h"
#include "net/http/http_status_code.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
namespace remoting {
const int kMaxSendAttempts = 5;
constexpr char kAuthorizationHeaderPrefix[] = "Authorization:Bearer ";
TelemetryLogWriter::TelemetryLogWriter(
const std::string& telemetry_base_url,
std::unique_ptr<OAuthTokenGetter> token_getter)
: telemetry_base_url_(telemetry_base_url),
token_getter_(std::move(token_getter)) {
DETACH_FROM_THREAD(thread_checker_);
DCHECK(token_getter_);
}
TelemetryLogWriter::~TelemetryLogWriter() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
}
void TelemetryLogWriter::Init(
std::unique_ptr<UrlRequestFactory> request_factory) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(!request_factory_);
DCHECK(request_factory);
request_factory_ = std::move(request_factory);
}
void TelemetryLogWriter::Log(const ChromotingEvent& entry) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
pending_entries_.push_back(entry);
SendPendingEntries();
}
void TelemetryLogWriter::SendPendingEntries() {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
if (!sending_entries_.empty() || pending_entries_.empty()) {
return;
}
std::unique_ptr<base::ListValue> events(new base::ListValue());
while (!pending_entries_.empty()) {
ChromotingEvent& entry = pending_entries_.front();
DCHECK(entry.IsDataValid());
events->Append(entry.CopyDictionaryValue());
entry.IncrementSendAttempts();
sending_entries_.push_back(std::move(entry));
pending_entries_.pop_front();
}
base::DictionaryValue log_dictionary;
log_dictionary.Set("event", std::move(events));
std::string json;
JSONStringValueSerializer serializer(&json);
if (!serializer.Serialize(log_dictionary)) {
LOG(ERROR) << "Failed to serialize log to JSON.";
return;
}
token_getter_->CallWithToken(base::BindOnce(
&TelemetryLogWriter::PostJsonToServer, base::Unretained(this), json));
}
void TelemetryLogWriter::PostJsonToServer(const std::string& json,
OAuthTokenGetter::Status status,
const std::string& user_email,
const std::string& access_token) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(!request_);
DCHECK(request_factory_);
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("CRD_telemetry_log", R"(
semantics {
sender: "Chrome Remote Desktop"
description: "Telemetry logs for Chrome Remote Desktop."
trigger:
"These requests are sent periodically when a session is connected, "
"i.e. CRD app is open and is connected to a host."
data:
"Anonymous usage statistics. Please see https://cs.chromium.org/"
"chromium/src/remoting/base/chromoting_event.h for more details."
destination: GOOGLE_OWNED_SERVICE
}
policy {
cookies_allowed: NO
setting:
"This feature cannot be disabled by settings. You can block Chrome "
"Remote Desktop as specified here: "
"https://support.google.com/chrome/?p=remote_desktop"
policy_exception_justification:
"The product is shipped separately from Chromium, except on Chrome "
"OS."
})");
request_ = request_factory_->CreateUrlRequest(
UrlRequest::Type::POST, telemetry_base_url_, traffic_annotation);
request_->AddHeader(kAuthorizationHeaderPrefix + access_token);
VLOG(1) << "Posting log to telemetry server: " << json;
request_->SetPostData("application/json", json);
request_->Start(base::BindRepeating(&TelemetryLogWriter::OnSendLogResult,
base::Unretained(this)));
}
void TelemetryLogWriter::OnSendLogResult(
const remoting::UrlRequest::Result& result) {
DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
DCHECK(request_);
if (!result.success || result.status != net::HTTP_OK) {
LOG(WARNING) << "Error occur when sending logs to the telemetry server, "
<< "status: " << result.status;
VLOG(1) << "Response body: \n"
<< "body: " << result.response_body;
// Reverse iterating + push_front in order to restore the order of logs.
for (auto i = sending_entries_.rbegin(); i < sending_entries_.rend(); i++) {
if (i->send_attempts() >= kMaxSendAttempts) {
break;
}
pending_entries_.push_front(std::move(*i));
}
} else {
VLOG(1) << "Successfully sent " << sending_entries_.size()
<< " log(s) to telemetry server.";
}
sending_entries_.clear();
request_.reset(); // This may also destroy the result.
SendPendingEntries();
}
} // namespace remoting