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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_SAFE_DIAL_DEVICE_DESCRIPTION_PARSER_H_
#define CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_SAFE_DIAL_DEVICE_DESCRIPTION_PARSER_H_
#include <memory>
#include <string>
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/media/router/discovery/dial/parsed_dial_device_description.h"
#include "services/data_decoder/public/cpp/data_decoder.h"
class GURL;
namespace media_router {
// SafeDialDeviceDescriptionParser parses the given device description XML file
// safely via a utility process.
// Spec for DIAL device description:
// http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v2.0.pdf
// Section 2.3 Device description.
class SafeDialDeviceDescriptionParser {
public:
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused. This class must stay in sync with
// the UMA enum MediaRouterDeviceDescriptionParsingResult.
enum class ParsingResult {
kSuccess = 0,
kInvalidXml,
kFailedToReadUdn,
kFailedToReadFriendlyName,
kFailedToReadModelName,
kFailedToReadDeviceType,
kMissingUniqueId,
kMissingFriendlyName,
kMissingAppUrl,
kInvalidAppUrl,
kUtilityProcessError,
kMaxValue = kUtilityProcessError,
};
SafeDialDeviceDescriptionParser();
SafeDialDeviceDescriptionParser(const SafeDialDeviceDescriptionParser&) =
delete;
SafeDialDeviceDescriptionParser& operator=(
const SafeDialDeviceDescriptionParser&) = delete;
~SafeDialDeviceDescriptionParser();
// Callback function invoked when done parsing some device description XML.
// |device_description|: device description object. Empty if parsing failed.
// |parsing_error|: error encountered while parsing the DIAL device
// description.
using ParseCallback = base::OnceCallback<void(
const ParsedDialDeviceDescription& device_description,
ParsingResult parsing_result)>;
// Parses the device description in |xml_text| in a utility process.
// If the parsing succeeds, invokes callback with a valid
// |device_description|, otherwise invokes callback with an empty
// |device_description| and sets parsing error to detail the failure.
// |app_url| is the app URL that should be set on the
// ParsedDialDeviceDescription object passed in the callback.
// Note that it's safe to call this method multiple times and when making
// multiple calls they may be grouped in the same utility process. The
// utility process is still cleaned up automatically if unused after some
// time, even if this object is still alive.
// Note also that the callback is not called if the object is deleted.
void Parse(const std::string& xml_text,
const GURL& app_url,
ParseCallback callback);
private:
void OnXmlParsingDone(SafeDialDeviceDescriptionParser::ParseCallback callback,
const GURL& app_url,
data_decoder::DataDecoder::ValueOrError result);
base::WeakPtrFactory<SafeDialDeviceDescriptionParser> weak_factory_{this};
};
} // namespace media_router
#endif // CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_SAFE_DIAL_DEVICE_DESCRIPTION_PARSER_H_
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