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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/extensions/api/url_handlers/url_handlers_parser.h"
#include <memory>
#include "base/command_line.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/offline_enabled_info.h"
#include "extensions/common/switches.h"
#include "net/base/network_change_notifier.h"
#include "url/gurl.h"
using net::NetworkChangeNotifier;
// TODO(sergeygs): Use the same strategy that externally_connectable does for
// parsing the manifest: declare a schema for the manifest entry in
// manifest_types.json, then use it here.
//
// See:
// chrome/common/extensions/api/manifest_types.json
// chrome/common/extensions/manifest_handlers/externally_connectable.*
//
// Do the same in (at least) file_handlers_parser.cc as well.
namespace extensions {
namespace {
const UrlHandlerInfo* GetMatchingUrlHandler(const Extension* extension,
const GURL& url) {
const std::vector<UrlHandlerInfo>* handlers =
UrlHandlers::GetUrlHandlers(extension);
if (!handlers)
return nullptr;
for (const auto& handler : *handlers) {
if (handler.patterns.MatchesURL(url))
return &handler;
}
return nullptr;
}
} // namespace
namespace mkeys = manifest_keys;
namespace merrors = manifest_errors;
UrlHandlerInfo::UrlHandlerInfo() = default;
UrlHandlerInfo::UrlHandlerInfo(UrlHandlerInfo&& other) = default;
UrlHandlerInfo::~UrlHandlerInfo() = default;
UrlHandlers::UrlHandlers() = default;
UrlHandlers::~UrlHandlers() = default;
// static
const std::vector<UrlHandlerInfo>* UrlHandlers::GetUrlHandlers(
const Extension* extension) {
UrlHandlers* info = static_cast<UrlHandlers*>(
extension->GetManifestData(mkeys::kUrlHandlers));
return info ? &info->handlers : nullptr;
}
// static
bool UrlHandlers::CanPlatformAppHandleUrl(const Extension* app,
const GURL& url) {
DCHECK(app->is_platform_app());
return !!GetMatchingPlatformAppUrlHandler(app, url);
}
// static
const UrlHandlerInfo* UrlHandlers::GetMatchingPlatformAppUrlHandler(
const Extension* app,
const GURL& url) {
DCHECK(app->is_platform_app());
if (NetworkChangeNotifier::IsOffline() &&
!OfflineEnabledInfo::IsOfflineEnabled(app))
return nullptr;
return GetMatchingUrlHandler(app, url);
}
UrlHandlersParser::UrlHandlersParser() = default;
UrlHandlersParser::~UrlHandlersParser() = default;
bool ParseUrlHandler(const std::string& handler_id,
const base::Value::Dict& handler_info,
std::vector<UrlHandlerInfo>* url_handlers,
std::u16string* error,
Extension* extension) {
DCHECK(error);
UrlHandlerInfo handler;
handler.id = handler_id;
if (const std::string* ptr =
handler_info.FindString(mkeys::kUrlHandlerTitle)) {
handler.title = *ptr;
} else {
*error = merrors::kInvalidURLHandlerTitle;
return false;
}
const base::Value::List* manif_patterns =
handler_info.FindList(mkeys::kMatches);
if (!manif_patterns || manif_patterns->empty()) {
*error = ErrorUtils::FormatErrorMessageUTF16(
merrors::kInvalidURLHandlerPattern, handler_id);
return false;
}
for (const auto& entry : *manif_patterns) {
std::string str_pattern =
entry.is_string() ? entry.GetString() : std::string();
// TODO(sergeygs): Limit this to non-top-level domains.
// TODO(sergeygs): Also add a verification to the CWS installer that the
// URL patterns claimed here belong to the app's author verified sites.
URLPattern pattern(URLPattern::SCHEME_HTTP | URLPattern::SCHEME_HTTPS);
if (pattern.Parse(str_pattern) != URLPattern::ParseResult::kSuccess) {
*error = ErrorUtils::FormatErrorMessageUTF16(
merrors::kInvalidURLHandlerPatternElement, handler_id);
return false;
}
handler.patterns.AddPattern(pattern);
}
url_handlers->push_back(std::move(handler));
return true;
}
bool UrlHandlersParser::Parse(Extension* extension, std::u16string* error) {
std::unique_ptr<UrlHandlers> info(new UrlHandlers);
const base::Value::Dict* all_handlers =
extension->manifest()->available_values().FindDict(mkeys::kUrlHandlers);
if (!all_handlers) {
*error = merrors::kInvalidURLHandlers;
return false;
}
DCHECK(extension->is_platform_app());
for (const auto item : *all_handlers) {
// A URL handler entry is a title and a list of URL patterns to handle.
const base::Value::Dict* handler = item.second.GetIfDict();
if (!handler) {
*error = merrors::kInvalidURLHandlerPatternElement16;
return false;
}
if (!ParseUrlHandler(item.first, *handler, &info->handlers, error,
extension)) {
// Text in |error| is set by ParseUrlHandler.
return false;
}
}
extension->SetManifestData(mkeys::kUrlHandlers, std::move(info));
return true;
}
base::span<const char* const> UrlHandlersParser::Keys() const {
static constexpr const char* kKeys[] = {mkeys::kUrlHandlers};
return kKeys;
}
} // namespace extensions
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