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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.
// Make sure stdint.h includes SIZE_MAX. (See C89, p259, footnote 221.)
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif
#include "components/domain_reliability/config.h"
#include <stdint.h>
#include "base/json/json_reader.h"
#include "base/json/json_value_converter.h"
#include "base/rand_util.h"
#include "base/strings/string_util.h"
namespace {
bool ConvertURL(const base::StringPiece& string_piece, GURL* url) {
*url = GURL(string_piece.as_string());
return url->is_valid();
}
bool IsValidSampleRate(double p) { return p >= 0.0 && p <= 1.0; }
} // namespace
namespace domain_reliability {
// static
const size_t DomainReliabilityConfig::kInvalidResourceIndex = SIZE_MAX;
DomainReliabilityConfig::Resource::Resource() {
}
DomainReliabilityConfig::Resource::~Resource() {}
bool DomainReliabilityConfig::Resource::MatchesUrl(const GURL& url) const {
const std::string& spec = url.spec();
ScopedVector<std::string>::const_iterator it;
for (it = url_patterns.begin(); it != url_patterns.end(); it++) {
if (MatchPattern(spec, **it))
return true;
}
return false;
}
bool DomainReliabilityConfig::Resource::DecideIfShouldReportRequest(
bool success) const {
double sample_rate = success ? success_sample_rate : failure_sample_rate;
DCHECK(IsValidSampleRate(sample_rate));
return base::RandDouble() < sample_rate;
}
// static
void DomainReliabilityConfig::Resource::RegisterJSONConverter(
base::JSONValueConverter<DomainReliabilityConfig::Resource>* converter) {
converter->RegisterStringField("resource_name", &Resource::name);
converter->RegisterRepeatedString("url_patterns", &Resource::url_patterns);
converter->RegisterDoubleField("success_sample_rate",
&Resource::success_sample_rate);
converter->RegisterDoubleField("failure_sample_rate",
&Resource::failure_sample_rate);
}
bool DomainReliabilityConfig::Resource::IsValid() const {
return !name.empty() && !url_patterns.empty() &&
IsValidSampleRate(success_sample_rate) &&
IsValidSampleRate(failure_sample_rate);
}
DomainReliabilityConfig::Collector::Collector() {}
DomainReliabilityConfig::Collector::~Collector() {}
// static
void DomainReliabilityConfig::Collector::RegisterJSONConverter(
base::JSONValueConverter<DomainReliabilityConfig::Collector>* converter) {
converter->RegisterCustomField<GURL>("upload_url", &Collector::upload_url,
&ConvertURL);
}
bool DomainReliabilityConfig::Collector::IsValid() const {
return upload_url.is_valid();
}
DomainReliabilityConfig::DomainReliabilityConfig() : valid_until(0.0) {}
DomainReliabilityConfig::~DomainReliabilityConfig() {}
// static
scoped_ptr<const DomainReliabilityConfig> DomainReliabilityConfig::FromJSON(
const base::StringPiece& json) {
scoped_ptr<base::Value> value(base::JSONReader::Read(json));
base::JSONValueConverter<DomainReliabilityConfig> converter;
DomainReliabilityConfig* config = new DomainReliabilityConfig();
// If we can parse and convert the JSON into a valid config, return that.
if (value && converter.Convert(*value, config) && config->IsValid())
return scoped_ptr<const DomainReliabilityConfig>(config);
else
return scoped_ptr<const DomainReliabilityConfig>();
}
bool DomainReliabilityConfig::IsValid() const {
if (valid_until == 0.0 || domain.empty() ||
resources.empty() || collectors.empty()) {
return false;
}
for (size_t i = 0; i < resources.size(); ++i) {
if (!resources[i]->IsValid())
return false;
}
for (size_t i = 0; i < collectors.size(); ++i) {
if (!collectors[i]->IsValid())
return false;
}
return true;
}
bool DomainReliabilityConfig::IsExpired(base::Time now) const {
DCHECK_NE(0.0, valid_until);
base::Time valid_until_time = base::Time::FromDoubleT(valid_until);
return now > valid_until_time;
}
size_t DomainReliabilityConfig::GetResourceIndexForUrl(const GURL& url) const {
// Removes username, password, and fragment.
GURL sanitized_url = url.GetAsReferrer();
for (size_t i = 0; i < resources.size(); ++i) {
if (resources[i]->MatchesUrl(sanitized_url))
return i;
}
return kInvalidResourceIndex;
}
// static
void DomainReliabilityConfig::RegisterJSONConverter(
base::JSONValueConverter<DomainReliabilityConfig>* converter) {
converter->RegisterStringField("config_version",
&DomainReliabilityConfig::version);
converter->RegisterDoubleField("config_valid_until",
&DomainReliabilityConfig::valid_until);
converter->RegisterStringField("monitored_domain",
&DomainReliabilityConfig::domain);
converter->RegisterRepeatedMessage("monitored_resources",
&DomainReliabilityConfig::resources);
converter->RegisterRepeatedMessage("collectors",
&DomainReliabilityConfig::collectors);
}
} // namespace domain_reliability
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