161 lines
3.8 KiB
C++
161 lines
3.8 KiB
C++
/*
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* Copyright 2003-2021 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "TidalTrackRequest.hxx"
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#include "TidalErrorParser.hxx"
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#include "lib/yajl/Callbacks.hxx"
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#include <cassert>
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using Wrapper = Yajl::CallbacksWrapper<TidalTrackRequest::ResponseParser>;
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static constexpr yajl_callbacks parse_callbacks = {
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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Wrapper::String,
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nullptr,
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Wrapper::MapKey,
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Wrapper::EndMap,
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nullptr,
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nullptr,
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};
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class TidalTrackRequest::ResponseParser final : public YajlResponseParser {
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enum class State {
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NONE,
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URLS,
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} state = State::NONE;
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std::string url;
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public:
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explicit ResponseParser() noexcept
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:YajlResponseParser(&parse_callbacks, nullptr, this) {}
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std::string &&GetUrl() {
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if (url.empty())
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throw std::runtime_error("No url in track response");
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return std::move(url);
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}
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/* yajl callbacks */
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bool String(StringView value) noexcept;
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bool MapKey(StringView value) noexcept;
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bool EndMap() noexcept;
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};
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static std::string
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MakeTrackUrl(const char *base_url, const char *track_id,
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const char *audioquality) noexcept
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{
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return std::string(base_url)
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+ "/tracks/"
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+ track_id
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+ "/urlpostpaywall?assetpresentation=FULL&audioquality="
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+ audioquality + "&urlusagemode=STREAM";
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}
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TidalTrackRequest::TidalTrackRequest(CurlGlobal &curl,
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const char *base_url, const char *token,
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const char *session,
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const char *track_id,
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const char *audioquality,
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TidalTrackHandler &_handler)
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:request(curl, MakeTrackUrl(base_url, track_id, audioquality).c_str(),
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*this),
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handler(_handler)
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{
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request_headers.Append((std::string("X-Tidal-Token:")
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+ token).c_str());
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request_headers.Append((std::string("X-Tidal-SessionId:")
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+ session).c_str());
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request.SetOption(CURLOPT_HTTPHEADER, request_headers.Get());
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}
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TidalTrackRequest::~TidalTrackRequest() noexcept
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{
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request.StopIndirect();
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}
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std::unique_ptr<CurlResponseParser>
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TidalTrackRequest::MakeParser(unsigned status,
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std::multimap<std::string, std::string> &&headers)
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{
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if (status != 200)
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return std::make_unique<TidalErrorParser>(status, headers);
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auto i = headers.find("content-type");
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if (i == headers.end() || i->second.find("/json") == i->second.npos)
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throw std::runtime_error("Not a JSON response from Tidal");
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return std::make_unique<ResponseParser>();
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}
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void
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TidalTrackRequest::FinishParser(std::unique_ptr<CurlResponseParser> p)
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{
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assert(dynamic_cast<ResponseParser *>(p.get()) != nullptr);
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auto &rp = (ResponseParser &)*p;
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handler.OnTidalTrackSuccess(rp.GetUrl());
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}
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void
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TidalTrackRequest::OnError(std::exception_ptr e) noexcept
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{
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handler.OnTidalTrackError(e);
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}
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inline bool
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TidalTrackRequest::ResponseParser::String(StringView value) noexcept
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{
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switch (state) {
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case State::NONE:
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break;
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case State::URLS:
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if (url.empty())
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url.assign(value.data, value.size);
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break;
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}
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return true;
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}
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inline bool
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TidalTrackRequest::ResponseParser::MapKey(StringView value) noexcept
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{
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if (value.Equals("urls"))
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state = State::URLS;
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else
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state = State::NONE;
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return true;
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}
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inline bool
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TidalTrackRequest::ResponseParser::EndMap() noexcept
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{
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state = State::NONE;
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return true;
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}
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