blob: 75ed807a22ef1665ebbfd697b30170ea5b9f809b [file] [log] [blame]
// Copyright 2017 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/ukm/ukm_source.h"
#include "base/atomicops.h"
#include "base/hash.h"
#include "third_party/metrics_proto/ukm/source.pb.h"
namespace ukm {
namespace {
// The maximum length of a URL we will record.
constexpr int kMaxURLLength = 2 * 1024;
// The string sent in place of a URL if the real URL was too long.
constexpr char kMaxUrlLengthMessage[] = "URLTooLong";
// Using a simple global assumes that all access to it will be done on the same
// thread, namely the UI thread. If this becomes not the case then it can be
// changed to an Atomic32 (make CustomTabState derive from int32_t) and accessed
// with no-barrier loads and stores.
UkmSource::CustomTabState g_custom_tab_state = UkmSource::kCustomTabUnset;
// Returns a URL that is under the length limit, by returning a constant
// string when the URl is too long.
std::string GetShortenedURL(const GURL& url) {
if (url.spec().length() > kMaxURLLength)
return kMaxUrlLengthMessage;
return url.spec();
} // namespace
// static
void UkmSource::SetCustomTabVisible(bool visible) {
g_custom_tab_state = visible ? kCustomTabTrue : kCustomTabFalse;
UkmSource::UkmSource(ukm::SourceId id, const GURL& url)
: id_(id),
creation_time_(base::TimeTicks::Now()) {
UkmSource::~UkmSource() = default;
void UkmSource::UpdateUrl(const GURL& url) {
if (url_ == url)
// We only track multiple URLs for navigation-based Sources. These are
// currently the only sources that intentionally record multiple entries,
// and this makes it easier to compare other source URLs against a
// whitelist.
if (initial_url_.is_empty() &&
GetSourceIdType(id_) == SourceIdType::NAVIGATION_ID)
initial_url_ = url_;
url_ = url;
void UkmSource::PopulateProto(Source* proto_source) const {
if (!initial_url_.is_empty()) {
DCHECK_EQ(SourceIdType::NAVIGATION_ID, GetSourceIdType(id_));
if (custom_tab_state_ != kCustomTabUnset)
proto_source->set_is_custom_tab(custom_tab_state_ == kCustomTabTrue);
} // namespace ukm