mpd/src/input/plugins/TidalErrorParser.hxx

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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef TIDAL_ERROR_PARSER_HXX
#define TIDAL_ERROR_PARSER_HXX
#include "check.h"
#include "lib/yajl/Handle.hxx"
#include <exception>
#include <string>
#include <map>
template<typename T> struct ConstBuffer;
struct StringView;
/**
* Parse an error JSON response.
*/
class TidalErrorParser {
const unsigned status;
Yajl::Handle parser;
enum class State {
NONE,
USER_MESSAGE,
} state = State::NONE;
std::string message;
public:
/**
* May throw if there is a formal error in the response
* headers.
*/
TidalErrorParser(unsigned status,
const std::multimap<std::string, std::string> &headers);
/**
* Feed response body data into the JSON parser.
*/
void OnData(ConstBuffer<void> data);
/**
* Throw an exception describing the error condition. Call
* this at the end of the response body.
*/
void OnEnd();
public:
/* yajl callbacks */
bool String(StringView value) noexcept;
bool MapKey(StringView value) noexcept;
bool EndMap() noexcept;
};
#endif