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// Copyright 2012 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/common/url_schemes.h"
#include <string.h>
#include <iterator>
#include <utility>
#include "base/no_destructor.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/url_constants.h"
#include "third_party/blink/public/common/scheme_registry.h"
#include "url/url_util.h"
#include "url/url_util_qt.h"
namespace content {
namespace {
bool g_registered_url_schemes = false;
const char* const kDefaultSavableSchemes[] = {
url::kHttpScheme,
url::kHttpsScheme,
url::kFileScheme,
url::kFileSystemScheme,
kChromeDevToolsScheme,
kChromeUIScheme,
url::kDataScheme
};
// These lists are lazily initialized below and are leaked on shutdown to
// prevent any destructors from being called that will slow us down or cause
// problems.
std::vector<std::string>& GetMutableSavableSchemes() {
static base::NoDestructor<std::vector<std::string>> schemes;
return *schemes;
}
// This set contains serialized canonicalized origins as well as hostname
// patterns. The latter are canonicalized by component.
std::vector<std::string>& GetMutableServiceWorkerSchemes() {
static base::NoDestructor<std::vector<std::string>> schemes;
return *schemes;
}
} // namespace
void RegisterContentSchemes(bool should_lock_registry) {
// On Android and in tests, schemes may have been registered already.
if (g_registered_url_schemes)
return;
g_registered_url_schemes = true;
ContentClient::Schemes schemes;
GetContentClient()->AddAdditionalSchemes(&schemes);
url::AddStandardScheme(kChromeDevToolsScheme, url::SCHEME_WITH_HOST);
url::AddStandardScheme(kChromeUIScheme, url::SCHEME_WITH_HOST);
url::AddStandardScheme(kChromeUIUntrustedScheme, url::SCHEME_WITH_HOST);
url::AddStandardScheme(kGuestScheme, url::SCHEME_WITH_HOST);
url::AddStandardScheme(kChromeErrorScheme, url::SCHEME_WITH_HOST);
for (auto& scheme : schemes.standard_schemes)
url::AddStandardScheme(scheme.c_str(), url::SCHEME_WITH_HOST);
for (auto& scheme : schemes.referrer_schemes)
url::AddReferrerScheme(scheme.c_str(), url::SCHEME_WITH_HOST);
schemes.secure_schemes.push_back(kChromeDevToolsScheme);
schemes.secure_schemes.push_back(kChromeUIScheme);
schemes.secure_schemes.push_back(kChromeUIUntrustedScheme);
schemes.secure_schemes.push_back(kChromeErrorScheme);
for (auto& scheme : schemes.secure_schemes)
url::AddSecureScheme(scheme.c_str());
for (auto& scheme : schemes.local_schemes)
url::AddLocalScheme(scheme.c_str());
for (auto& scheme : schemes.extension_schemes)
blink::CommonSchemeRegistry::RegisterURLSchemeAsExtension(scheme.c_str());
schemes.no_access_schemes.push_back(kChromeErrorScheme);
for (auto& scheme : schemes.no_access_schemes)
url::AddNoAccessScheme(scheme.c_str());
schemes.cors_enabled_schemes.push_back(kChromeUIScheme);
schemes.cors_enabled_schemes.push_back(kChromeUIUntrustedScheme);
for (auto& scheme : schemes.cors_enabled_schemes)
url::AddCorsEnabledScheme(scheme.c_str());
// TODO(mkwst): Investigate whether chrome-error should be included in
// csp_bypassing_schemes.
for (auto& scheme : schemes.csp_bypassing_schemes)
url::AddCSPBypassingScheme(scheme.c_str());
for (auto& scheme : schemes.empty_document_schemes)
url::AddEmptyDocumentScheme(scheme.c_str());
#if BUILDFLAG(IS_ANDROID) || defined(TOOLKIT_QT)
if (schemes.allow_non_standard_schemes_in_origins)
url::EnableNonStandardSchemesForAndroidWebView();
#endif
for (auto& [scheme, handler] : schemes.predefined_handler_schemes)
url::AddPredefinedHandlerScheme(scheme.c_str(), handler.c_str());
// This should only be registered if the
// kEnableServiceWorkerForChromeUntrusted feature is enabled but checking
// it here causes a crash when --no-sandbox is enabled. See crbug.com/1313812
// There are other render side checks and browser side checks that ensure
// service workers don't work for chrome-untrusted:// when the flag is not
// enabled.
schemes.service_worker_schemes.push_back(kChromeUIUntrustedScheme);
// NOTE(juvaldma)(Chromium 67.0.3396.47)
//
// Since ContentClient::Schemes::standard_types doesn't have types
// (url::SchemeType), we need to bypass AddAdditionalSchemes and add our
// 'standard custom schemes' directly. Although the other scheme lists could
// be filled also in AddAdditionalSchemes by QtWebEngineCore, to follow the
// principle of the separation of concerns, we add them here instead. This
// way, from the perspective of QtWebEngineCore, everything to do with custom
// scheme parsing is fully encapsulated behind url::CustomScheme. The
// complexity of QtWebEngineCore is reduced while the complexity of
// url::CustomScheme is not significantly increased (since the functionality
// is needed anyway).
for (auto& cs : url::CustomScheme::GetSchemes()) {
if (cs.type != url::SCHEME_WITHOUT_AUTHORITY)
url::AddStandardScheme(cs.name.c_str(), cs.type);
if (cs.flags & url::CustomScheme::Secure)
url::AddSecureScheme(cs.name.c_str());
if (cs.flags & url::CustomScheme::Local)
url::AddLocalScheme(cs.name.c_str());
if (cs.flags & url::CustomScheme::NoAccessAllowed)
url::AddNoAccessScheme(cs.name.c_str());
if (cs.flags & url::CustomScheme::ContentSecurityPolicyIgnored)
url::AddCSPBypassingScheme(cs.name.c_str());
if (cs.flags & url::CustomScheme::CorsEnabled)
url::AddCorsEnabledScheme(cs.name.c_str());
}
// Prevent future modification of the scheme lists. This is to prevent
// accidental creation of data races in the program. Add*Scheme aren't
// threadsafe so must be called when GURL isn't used on any other thread. This
// is really easy to mess up, so we say that all calls to Add*Scheme in Chrome
// must be inside this function.
if (should_lock_registry)
url::LockSchemeRegistries();
// Combine the default savable schemes with the additional ones given.
GetMutableSavableSchemes().assign(std::begin(kDefaultSavableSchemes),
std::end(kDefaultSavableSchemes));
GetMutableSavableSchemes().insert(GetMutableSavableSchemes().end(),
schemes.savable_schemes.begin(),
schemes.savable_schemes.end());
GetMutableServiceWorkerSchemes() = std::move(schemes.service_worker_schemes);
// NOTE(juvaldma)(Chromium 67.0.3396.47)
//
// This list only applies to Chromium proper whereas Blink uses it's own
// hardcoded list (see blink::URLSchemesRegistry).
for (auto& cs : url::CustomScheme::GetSchemes()) {
if (cs.flags & url::CustomScheme::ServiceWorkersAllowed)
GetMutableServiceWorkerSchemes().push_back(cs.name);
}
}
void ReRegisterContentSchemesForTests() {
url::ClearSchemesForTests();
g_registered_url_schemes = false;
RegisterContentSchemes();
}
const std::vector<std::string>& GetSavableSchemes() {
return GetMutableSavableSchemes();
}
const std::vector<std::string>& GetServiceWorkerSchemes() {
return GetMutableServiceWorkerSchemes();
}
} // namespace content
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