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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/origin_trials/critical_origin_trials_throttle.h"
#include <string>
#include <string_view>
#include <utility>
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/memory/scoped_refptr.h"
#include "base/strings/strcat.h"
#include "content/public/browser/origin_trials_controller_delegate.h"
#include "net/http/http_response_headers.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/common/loader/url_loader_throttle.h"
#include "third_party/blink/public/common/origin_trials/scoped_test_origin_trial_policy.h"
#include "third_party/blink/public/mojom/loader/resource_load_info.mojom.h"
#include "third_party/blink/public/mojom/origin_trials/origin_trial_feature.mojom-shared.h"
#include "url/gurl.h"
#include "url/origin.h"
namespace content {
namespace {
using blink::mojom::ResourceType;
const char kExampleURL[] = "https://example.com/";
const char kHttpHeaderPreamble[] = "HTTP/1.1 200 OK\n";
const char kOriginTrialHeader[] = "Origin-Trial: ";
const char kCriticalOriginTrialHeader[] = "Critical-Origin-Trial: ";
const char kCRLF[] = "\n";
const char kHttpHeaderTerminator[] = "\n\n";
const char kPersistentTrialName[] = "FrobulatePersistent";
const char kFakePersistentTrialName[] = "FakePersistent";
// Generated with
// tools/origin_trials/generate_token.py https://example.com FrobulatePersistent
// --expire-timestamp=2000000000
const char kPersistentTrialToken[] =
"AzZfd1vKZ0SSGRGk/"
"8nIszQSlHYjbuYVE3jwaNZG3X4t11zRhzPWWJwTZ+JJDS3JJsyEZcpz+y20pAP6/"
"6upOQ4AAABdeyJvcmlnaW4iOiAiaHR0cHM6Ly9leGFtcGxlLmNvbTo0NDMiLCAiZmVhdHVyZSI"
"6ICJGcm9idWxhdGVQZXJzaXN0ZW50IiwgImV4cGlyeSI6IDIwMDAwMDAwMDB9";
class MockOriginTrialsDelegate
: public content::OriginTrialsControllerDelegate {
public:
~MockOriginTrialsDelegate() override = default;
base::flat_map<url::Origin, base::flat_set<std::string>> persisted_trials_;
int get_persisted_trials_count_ = 0;
base::flat_set<std::string> GetPersistedTrialsForOrigin(
const url::Origin& origin,
const url::Origin& top_level_origin,
base::Time current_time) override {
get_persisted_trials_count_++;
const auto& it = persisted_trials_.find(origin);
if (it != persisted_trials_.end()) {
return it->second;
} else {
return {};
}
}
bool IsFeaturePersistedForOrigin(const url::Origin& origin,
const url::Origin& top_level_origin,
blink::mojom::OriginTrialFeature feature,
const base::Time current_time) override {
std::string trial_name = "";
switch (feature) {
case blink::mojom::OriginTrialFeature::
kOriginTrialsSampleAPIPersistentFeature:
trial_name = kPersistentTrialName;
break;
default:
break;
}
const auto& it = persisted_trials_.find(origin);
return it != persisted_trials_.end() && it->second.contains(trial_name);
}
void PersistTrialsFromTokens(
const url::Origin& origin,
const url::Origin& top_level_origin,
const base::span<const std::string> header_tokens,
const base::Time current_time,
std::optional<ukm::SourceId> source_id) override {
DCHECK(false) << "Critical Origin Trial Throttle should not override full "
"set of tokens, only append.";
}
void PersistAdditionalTrialsFromTokens(
const url::Origin& origin,
const url::Origin& top_level_origin,
const base::span<const url::Origin> script_origins,
const base::span<const std::string> header_tokens,
const base::Time current_time,
std::optional<ukm::SourceId> source_id) override {}
void ClearPersistedTokens() override { persisted_trials_.clear(); }
void AddPersistedTrialForTest(std::string_view url,
std::string_view trial_name) {
url::Origin key = url::Origin::Create(GURL(url));
persisted_trials_[key].emplace(trial_name);
}
};
class CriticalOriginTrialsThrottleTest : public ::testing::Test {
public:
CriticalOriginTrialsThrottleTest()
: origin_trials_delegate_(),
throttle_(origin_trials_delegate_,
url::Origin::Create(GURL(kExampleURL)),
/*source_id=*/std::nullopt) {}
~CriticalOriginTrialsThrottleTest() override = default;
std::string CreateHeaderLines(std::string_view prefix,
const base::span<std::string> values) {
std::string line;
for (const std::string& value : values)
line += base::StrCat({prefix, value, kCRLF});
return line;
}
void StartRequest(std::string_view url, ResourceType resource_type) {
network::ResourceRequest request;
request.url = GURL(url);
request.resource_type = static_cast<int>(resource_type);
bool defer = false;
throttle_.WillStartRequest(&request, &defer);
}
blink::URLLoaderThrottle::RestartWithURLReset BeforeWillProcess(
std::string_view url,
const base::span<std::string> origin_trial_tokens = {},
const base::span<std::string> critical_origin_trials = {}) {
network::mojom::URLResponseHead response_head;
response_head.headers = net::HttpResponseHeaders::TryToCreate(base::StrCat(
{kHttpHeaderPreamble,
CreateHeaderLines(kOriginTrialHeader, origin_trial_tokens),
CreateHeaderLines(kCriticalOriginTrialHeader, critical_origin_trials),
kHttpHeaderTerminator}));
blink::URLLoaderThrottle::RestartWithURLReset restart_with_url_reset(false);
throttle_.BeforeWillProcessResponse(GURL(url), response_head,
&restart_with_url_reset);
return restart_with_url_reset;
}
protected:
blink::ScopedTestOriginTrialPolicy trial_policy_;
MockOriginTrialsDelegate origin_trials_delegate_;
CriticalOriginTrialsThrottle throttle_;
};
TEST_F(CriticalOriginTrialsThrottleTest,
StartRequestShouldStoreExistingPersistedTrials) {
StartRequest(kExampleURL, ResourceType::kMainFrame);
EXPECT_EQ(1, origin_trials_delegate_.get_persisted_trials_count_);
}
TEST_F(CriticalOriginTrialsThrottleTest,
CriticalShouldRestartIfNotAlreadyPresent) {
StartRequest(kExampleURL, ResourceType::kMainFrame);
std::vector<std::string> tokens = {kPersistentTrialToken};
std::vector<std::string> critical_trials = {kPersistentTrialName};
EXPECT_TRUE(BeforeWillProcess(kExampleURL, tokens, critical_trials));
}
TEST_F(CriticalOriginTrialsThrottleTest,
CriticalShouldRestartIfNotAlreadyPresentForSubframe) {
StartRequest(kExampleURL, ResourceType::kSubFrame);
std::vector<std::string> tokens = {kPersistentTrialToken};
std::vector<std::string> critical_trials = {kPersistentTrialName};
EXPECT_TRUE(BeforeWillProcess(kExampleURL, tokens, critical_trials));
}
TEST_F(CriticalOriginTrialsThrottleTest,
CriticalShouldNotRestartIfNotAlreadyPresentForImageResource) {
StartRequest(kExampleURL, ResourceType::kImage);
std::vector<std::string> tokens = {kPersistentTrialToken};
std::vector<std::string> critical_trials = {kPersistentTrialName};
EXPECT_FALSE(BeforeWillProcess(kExampleURL, tokens, critical_trials));
}
TEST_F(CriticalOriginTrialsThrottleTest, NoHeadersShouldNotRestartRequest) {
StartRequest(kExampleURL, ResourceType::kMainFrame);
EXPECT_FALSE(BeforeWillProcess(kExampleURL));
}
TEST_F(CriticalOriginTrialsThrottleTest,
NoCriticalHeadersShouldNotRestartRequest) {
StartRequest(kExampleURL, ResourceType::kMainFrame);
std::vector<std::string> tokens = {kPersistentTrialToken};
EXPECT_FALSE(BeforeWillProcess(kExampleURL, tokens));
}
TEST_F(CriticalOriginTrialsThrottleTest,
CriticalForNonRequestedTrialShouldNotRestart) {
StartRequest(kExampleURL, ResourceType::kMainFrame);
std::vector<std::string> tokens = {kPersistentTrialToken};
std::vector<std::string> critical_trials = {kFakePersistentTrialName};
EXPECT_FALSE(BeforeWillProcess(kExampleURL, tokens, critical_trials));
}
TEST_F(CriticalOriginTrialsThrottleTest,
CriticalShouldNotRestartIfPreviouslySet) {
origin_trials_delegate_.AddPersistedTrialForTest(kExampleURL,
kPersistentTrialName);
StartRequest(kExampleURL, ResourceType::kMainFrame);
std::vector<std::string> tokens = {kPersistentTrialToken};
std::vector<std::string> critical_trials = {kPersistentTrialName};
EXPECT_FALSE(BeforeWillProcess(kExampleURL, tokens, critical_trials));
}
} // namespace
} // namespace content
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