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/*
* Copyright 2003-2021 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.
*/
#include "TidalTrackRequest.hxx"
#include "TidalErrorParser.hxx"
#include "lib/yajl/Callbacks.hxx"
#include <cassert>
using Wrapper = Yajl::CallbacksWrapper<TidalTrackRequest::ResponseParser>;
static constexpr yajl_callbacks parse_callbacks = {
nullptr,
nullptr,
nullptr,
nullptr,
nullptr,
Wrapper::String,
nullptr,
Wrapper::MapKey,
Wrapper::EndMap,
nullptr,
nullptr,
};
class TidalTrackRequest::ResponseParser final : public YajlResponseParser {
enum class State {
NONE,
URLS,
} state = State::NONE;
std::string url;
public:
explicit ResponseParser() noexcept
:YajlResponseParser(&parse_callbacks, nullptr, this) {}
std::string &&GetUrl() {
if (url.empty())
throw std::runtime_error("No url in track response");
return std::move(url);
}
/* yajl callbacks */
bool String(StringView value) noexcept;
bool MapKey(StringView value) noexcept;
bool EndMap() noexcept;
};
static std::string
MakeTrackUrl(const char *base_url, const char *track_id,
const char *audioquality) noexcept
{
return std::string(base_url)
+ "/tracks/"
+ track_id
+ "/urlpostpaywall?assetpresentation=FULL&audioquality="
+ audioquality + "&urlusagemode=STREAM";
}
TidalTrackRequest::TidalTrackRequest(CurlGlobal &curl,
const char *base_url, const char *token,
const char *session,
const char *track_id,
const char *audioquality,
TidalTrackHandler &_handler)
:request(curl, MakeTrackUrl(base_url, track_id, audioquality).c_str(),
*this),
handler(_handler)
{
request_headers.Append((std::string("X-Tidal-Token:")
+ token).c_str());
request_headers.Append((std::string("X-Tidal-SessionId:")
+ session).c_str());
request.SetOption(CURLOPT_HTTPHEADER, request_headers.Get());
}
TidalTrackRequest::~TidalTrackRequest() noexcept
{
request.StopIndirect();
}
std::unique_ptr<CurlResponseParser>
TidalTrackRequest::MakeParser(unsigned status,
std::multimap<std::string, std::string> &&headers)
{
if (status != 200)
return std::make_unique<TidalErrorParser>(status, headers);
auto i = headers.find("content-type");
if (i == headers.end() || i->second.find("/json") == i->second.npos)
throw std::runtime_error("Not a JSON response from Tidal");
return std::make_unique<ResponseParser>();
}
void
TidalTrackRequest::FinishParser(std::unique_ptr<CurlResponseParser> p)
{
assert(dynamic_cast<ResponseParser *>(p.get()) != nullptr);
auto &rp = (ResponseParser &)*p;
handler.OnTidalTrackSuccess(rp.GetUrl());
}
void
TidalTrackRequest::OnError(std::exception_ptr e) noexcept
{
handler.OnTidalTrackError(e);
}
inline bool
TidalTrackRequest::ResponseParser::String(StringView value) noexcept
{
switch (state) {
case State::NONE:
break;
case State::URLS:
if (url.empty())
url.assign(value.data, value.size);
break;
}
return true;
}
inline bool
TidalTrackRequest::ResponseParser::MapKey(StringView value) noexcept
{
if (value.Equals("urls"))
state = State::URLS;
else
state = State::NONE;
return true;
}
inline bool
TidalTrackRequest::ResponseParser::EndMap() noexcept
{
state = State::NONE;
return true;
}
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