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strawberry-audio-player-win.../src/covermanager/spotifycoverprovider.cpp

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/*
* Strawberry Music Player
* Copyright 2020-2021, Jonas Kvinge <jonas@jkvinge.net>
*
* Strawberry 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 3 of the License, or
* (at your option) any later version.
*
* Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include <algorithm>
#include <QtGlobal>
#include <QObject>
#include <QList>
#include <QVariant>
#include <QByteArray>
#include <QString>
#include <QUrl>
#include <QUrlQuery>
#include <QDateTime>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QSslError>
#include <QCryptographicHash>
#include <QJsonDocument>
#include <QJsonValue>
#include <QJsonObject>
#include <QJsonArray>
#include <QDesktopServices>
#include <QMessageBox>
#include <QtDebug>
#include "core/application.h"
#include "core/networkaccessmanager.h"
#include "core/logging.h"
#include "core/song.h"
#include "core/utilities.h"
#include "core/timeconstants.h"
#include "internet/localredirectserver.h"
#include "albumcoverfetcher.h"
#include "jsoncoverprovider.h"
#include "spotifycoverprovider.h"
const char *SpotifyCoverProvider::kSettingsGroup = "Spotify";
const char *SpotifyCoverProvider::kOAuthAuthorizeUrl = "https://accounts.spotify.com/authorize";
const char *SpotifyCoverProvider::kOAuthAccessTokenUrl = "https://accounts.spotify.com/api/token";
const char *SpotifyCoverProvider::kOAuthRedirectUrl = "http://localhost:63111/";
const char *SpotifyCoverProvider::kClientIDB64 = "ZTZjY2Y2OTQ5NzY1NGE3NThjOTAxNWViYzdiMWQzMTc=";
const char *SpotifyCoverProvider::kClientSecretB64 = "N2ZlMDMxODk1NTBlNDE3ZGI1ZWQ1MzE3ZGZlZmU2MTE=";
const char *SpotifyCoverProvider::kApiUrl = "https://api.spotify.com/v1";
const int SpotifyCoverProvider::kLimit = 10;
SpotifyCoverProvider::SpotifyCoverProvider(Application *app, NetworkAccessManager *network, QObject *parent)
: JsonCoverProvider("Spotify", true, true, 2.5, true, true, app, network, parent),
server_(nullptr),
expires_in_(0),
login_time_(0) {
refresh_login_timer_.setSingleShot(true);
QObject::connect(&refresh_login_timer_, &QTimer::timeout, this, &SpotifyCoverProvider::RequestNewAccessToken);
QSettings s;
s.beginGroup(kSettingsGroup);
access_token_ = s.value("access_token").toString();
refresh_token_ = s.value("refresh_token").toString();
expires_in_ = s.value("expires_in").toLongLong();
login_time_ = s.value("login_time").toLongLong();
s.endGroup();
if (!refresh_token_.isEmpty()) {
quint64 time = expires_in_ - (QDateTime::currentDateTime().toSecsSinceEpoch() - login_time_);
if (time < 1) time = 1;
refresh_login_timer_.setInterval(static_cast<int>(time * kMsecPerSec));
refresh_login_timer_.start();
}
}
SpotifyCoverProvider::~SpotifyCoverProvider() {
while (!replies_.isEmpty()) {
QNetworkReply *reply = replies_.takeFirst();
QObject::disconnect(reply, nullptr, this, nullptr);
reply->abort();
reply->deleteLater();
}
}
void SpotifyCoverProvider::Authenticate() {
QUrl redirect_url(kOAuthRedirectUrl);
if (!server_) {
server_ = new LocalRedirectServer(this);
server_->set_https(false);
int port = redirect_url.port();
int port_max = port + 10;
bool success = false;
forever {
server_->set_port(port);
if (server_->Listen()) { success = true; break; }
++port;
if (port > port_max) break;
}
if (!success) {
AuthError(server_->error());
server_->deleteLater();
server_ = nullptr;
return;
}
QObject::connect(server_, &LocalRedirectServer::Finished, this, &SpotifyCoverProvider::RedirectArrived);
}
code_verifier_ = Utilities::CryptographicRandomString(44);
code_challenge_ = QString(QCryptographicHash::hash(code_verifier_.toUtf8(), QCryptographicHash::Sha256).toBase64(QByteArray::Base64UrlEncoding));
if (code_challenge_.lastIndexOf(QChar('=')) == code_challenge_.length() - 1) {
code_challenge_.chop(1);
}
const ParamList params = ParamList() << Param("client_id", QByteArray::fromBase64(kClientIDB64))
<< Param("response_type", "code")
<< Param("redirect_uri", redirect_url.toString())
<< Param("state", code_challenge_);
QUrlQuery url_query;
for (const Param &param : params) {
url_query.addQueryItem(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
}
QUrl url(kOAuthAuthorizeUrl);
url.setQuery(url_query);
const bool result = QDesktopServices::openUrl(url);
if (!result) {
QMessageBox messagebox(QMessageBox::Information, tr("Spotify Authentication"), tr("Please open this URL in your browser") + QString(":<br /><a href=\"%1\">%1</a>").arg(url.toString()), QMessageBox::Ok);
messagebox.setTextFormat(Qt::RichText);
messagebox.exec();
}
}
void SpotifyCoverProvider::Deauthenticate() {
access_token_.clear();
refresh_token_.clear();
expires_in_ = 0;
login_time_ = 0;
QSettings s;
s.beginGroup(kSettingsGroup);
s.remove("access_token");
s.remove("refresh_token");
s.remove("expires_in");
s.remove("login_time");
s.endGroup();
refresh_login_timer_.stop();
}
void SpotifyCoverProvider::RedirectArrived() {
if (!server_) return;
if (server_->error().isEmpty()) {
QUrl url = server_->request_url();
if (url.isValid()) {
QUrlQuery url_query(url);
if (url_query.hasQueryItem("error")) {
AuthError(QUrlQuery(url).queryItemValue("error"));
}
else if (url_query.hasQueryItem("code") && url_query.hasQueryItem("state")) {
qLog(Debug) << "Spotify: Authorization URL Received" << url;
QString code = url_query.queryItemValue("code");
QUrl redirect_url(kOAuthRedirectUrl);
redirect_url.setPort(server_->url().port());
RequestAccessToken(code, redirect_url);
}
else {
AuthError(tr("Redirect missing token code or state!"));
}
}
else {
AuthError(tr("Received invalid reply from web browser."));
}
}
else {
AuthError(server_->error());
}
server_->close();
server_->deleteLater();
server_ = nullptr;
}
void SpotifyCoverProvider::RequestAccessToken(const QString &code, const QUrl &redirect_url) {
refresh_login_timer_.stop();
ParamList params = ParamList() << Param("client_id", QByteArray::fromBase64(kClientIDB64))
<< Param("client_secret", QByteArray::fromBase64(kClientSecretB64));
if (!code.isEmpty() && !redirect_url.isEmpty()) {
params << Param("grant_type", "authorization_code");
params << Param("code", code);
params << Param("redirect_uri", redirect_url.toString());
}
else if (!refresh_token_.isEmpty() && is_enabled()) {
params << Param("grant_type", "refresh_token");
params << Param("refresh_token", refresh_token_);
}
else {
return;
}
QUrlQuery url_query;
for (const Param &param : params) {
url_query.addQueryItem(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
}
QUrl new_url(kOAuthAccessTokenUrl);
QNetworkRequest req(new_url);
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
#else
req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
#endif
req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
QString auth_header_data = QByteArray::fromBase64(kClientIDB64) + QString(":") + QByteArray::fromBase64(kClientSecretB64);
req.setRawHeader("Authorization", "Basic " + auth_header_data.toUtf8().toBase64());
QByteArray query = url_query.toString(QUrl::FullyEncoded).toUtf8();
QNetworkReply *reply = network_->post(req, query);
replies_ << reply;
QObject::connect(reply, &QNetworkReply::sslErrors, this, &SpotifyCoverProvider::HandleLoginSSLErrors);
QObject::connect(reply, &QNetworkReply::finished, this, [this, reply]() { AccessTokenRequestFinished(reply); });
}
void SpotifyCoverProvider::HandleLoginSSLErrors(const QList<QSslError> &ssl_errors) {
for (const QSslError &ssl_error : ssl_errors) {
login_errors_ += ssl_error.errorString();
}
}
void SpotifyCoverProvider::AccessTokenRequestFinished(QNetworkReply *reply) {
if (!replies_.contains(reply)) return;
replies_.removeAll(reply);
QObject::disconnect(reply, nullptr, this, nullptr);
reply->deleteLater();
if (reply->error() != QNetworkReply::NoError || reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() != 200) {
if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
// This is a network error, there is nothing more to do.
AuthError(QString("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
return;
}
else {
// See if there is Json data containing "error" and "error_description" then use that instead.
QByteArray data = reply->readAll();
QJsonParseError json_error;
QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
if (json_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
QJsonObject json_obj = json_doc.object();
if (!json_obj.isEmpty() && json_obj.contains("error") && json_obj.contains("error_description")) {
QString error = json_obj["error"].toString();
QString error_description = json_obj["error_description"].toString();
login_errors_ << QString("Authentication failure: %1 (%2)").arg(error, error_description);
}
}
if (login_errors_.isEmpty()) {
if (reply->error() != QNetworkReply::NoError) {
login_errors_ << QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
}
else {
login_errors_ << QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
}
}
AuthError();
return;
}
}
QByteArray data = reply->readAll();
QJsonParseError json_error;
QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
if (json_error.error != QJsonParseError::NoError) {
Error(QString("Failed to parse Json data in authentication reply: %1").arg(json_error.errorString()));
return;
}
if (json_doc.isEmpty()) {
AuthError("Authentication reply from server has empty Json document.");
return;
}
if (!json_doc.isObject()) {
AuthError("Authentication reply from server has Json document that is not an object.", json_doc);
return;
}
QJsonObject json_obj = json_doc.object();
if (json_obj.isEmpty()) {
AuthError("Authentication reply from server has empty Json object.", json_doc);
return;
}
if (!json_obj.contains("access_token") || !json_obj.contains("expires_in")) {
AuthError("Authentication reply from server is missing access token or expires in.", json_obj);
return;
}
access_token_ = json_obj["access_token"].toString();
if (json_obj.contains("refresh_token")) {
refresh_token_ = json_obj["refresh_token"].toString();
}
expires_in_ = json_obj["expires_in"].toInt();
login_time_ = QDateTime::currentDateTime().toSecsSinceEpoch();
QSettings s;
s.beginGroup(kSettingsGroup);
s.setValue("access_token", access_token_);
s.setValue("refresh_token", refresh_token_);
s.setValue("expires_in", expires_in_);
s.setValue("login_time", login_time_);
s.endGroup();
if (expires_in_ > 0) {
refresh_login_timer_.setInterval(static_cast<int>(expires_in_ * kMsecPerSec));
refresh_login_timer_.start();
}
qLog(Debug) << "Spotify: Authentication was successful, login expires in" << expires_in_;
emit AuthenticationComplete(true);
emit AuthenticationSuccess();
}
bool SpotifyCoverProvider::StartSearch(const QString &artist, const QString &album, const QString &title, const int id) {
if (access_token_.isEmpty()) return false;
if (artist.isEmpty() && album.isEmpty() && title.isEmpty()) return false;
QString type;
QString extract;
QString query = artist;
if (album.isEmpty() && !title.isEmpty()) {
type = "track";
extract = "tracks";
if (!query.isEmpty()) query.append(" ");
query.append(title);
}
else {
type = "album";
extract = "albums";
if (!album.isEmpty()) {
if (!query.isEmpty()) query.append(" ");
query.append(album);
}
}
ParamList params = ParamList() << Param("q", query)
<< Param("type", type)
<< Param("limit", QString::number(kLimit));
QUrlQuery url_query;
for (const Param &param : params) {
url_query.addQueryItem(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
}
QUrl url(kApiUrl + QString("/search"));
url.setQuery(url_query);
QNetworkRequest req(url);
#if QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
req.setAttribute(QNetworkRequest::RedirectPolicyAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
#else
req.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
#endif
req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
req.setRawHeader("Authorization", "Bearer " + access_token_.toUtf8());
QNetworkReply *reply = network_->get(req);
replies_ << reply;
QObject::connect(reply, &QNetworkReply::finished, this, [this, reply, id, extract]() { HandleSearchReply(reply, id, extract); });
return true;
}
void SpotifyCoverProvider::CancelSearch(const int id) { Q_UNUSED(id); }
QByteArray SpotifyCoverProvider::GetReplyData(QNetworkReply *reply) {
QByteArray data;
if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200) {
data = reply->readAll();
}
else {
if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
// This is a network error, there is nothing more to do.
Error(QString("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
}
else {
data = reply->readAll();
QJsonParseError parse_error;
QJsonDocument json_doc = QJsonDocument::fromJson(data, &parse_error);
QString error;
if (parse_error.error == QJsonParseError::NoError && !json_doc.isEmpty() && json_doc.isObject()) {
QJsonObject json_obj = json_doc.object();
if (!json_obj.isEmpty() && json_obj.contains("error") && json_obj["error"].isObject()) {
QJsonObject obj_error = json_obj["error"].toObject();
if (obj_error.contains("status") && obj_error.contains("message")) {
int status = obj_error["status"].toInt();
QString message = obj_error["message"].toString();
error = QString("%1 (%2)").arg(message).arg(status);
if (status == 401) access_token_.clear();
}
}
}
if (error.isEmpty()) {
if (reply->error() != QNetworkReply::NoError) {
if (reply->error() == 204) access_token_.clear();
error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
}
else {
error = QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
}
}
Error(error);
}
return QByteArray();
}
return data;
}
void SpotifyCoverProvider::HandleSearchReply(QNetworkReply *reply, const int id, const QString &extract) {
if (!replies_.contains(reply)) return;
replies_.removeAll(reply);
QObject::disconnect(reply, nullptr, this, nullptr);
reply->deleteLater();
QByteArray data = GetReplyData(reply);
if (data.isEmpty()) {
emit SearchFinished(id, CoverProviderSearchResults());
return;
}
QJsonObject json_obj = ExtractJsonObj(data);
if (json_obj.isEmpty()) {
emit SearchFinished(id, CoverProviderSearchResults());
return;
}
if (!json_obj.contains(extract) || !json_obj[extract].isObject()) {
Error(QString("Json object is missing %1 object.").arg(extract), json_obj);
emit SearchFinished(id, CoverProviderSearchResults());
return;
}
json_obj = json_obj[extract].toObject();
if (!json_obj.contains("items") || !json_obj["items"].isArray()) {
Error(QString("%1 object is missing items array.").arg(extract), json_obj);
emit SearchFinished(id, CoverProviderSearchResults());
return;
}
QJsonArray array_items = json_obj["items"].toArray();
if (array_items.isEmpty()) {
emit SearchFinished(id, CoverProviderSearchResults());
return;
}
CoverProviderSearchResults results;
for (const QJsonValueRef value_item : array_items) {
if (!value_item.isObject()) {
continue;
}
QJsonObject obj_item = value_item.toObject();
QJsonObject obj_album = obj_item;
if (obj_item.contains("album") && obj_item["album"].isObject()) {
obj_album = obj_item["album"].toObject();
}
if (!obj_album.contains("artists") || !obj_album.contains("name") || !obj_album.contains("images") || !obj_album["artists"].isArray() || !obj_album["images"].isArray()) {
continue;
}
QJsonArray array_artists = obj_album["artists"].toArray();
QJsonArray array_images = obj_album["images"].toArray();
QString album = obj_album["name"].toString();
QStringList artists;
for (const QJsonValueRef value_artist : array_artists) {
if (!value_artist.isObject()) continue;
QJsonObject obj_artist = value_artist.toObject();
if (!obj_artist.contains("name")) continue;
artists << obj_artist["name"].toString();
}
for (const QJsonValueRef value_image : array_images) {
if (!value_image.isObject()) continue;
QJsonObject obj_image = value_image.toObject();
if (!obj_image.contains("url") || !obj_image.contains("width") || !obj_image.contains("height")) continue;
int width = obj_image["width"].toInt();
int height = obj_image["height"].toInt();
if (width < 300 || height < 300) continue;
QUrl url(obj_image["url"].toString());
CoverProviderSearchResult result;
result.album = album;
result.image_url = url;
result.image_size = QSize(width, height);
if (!artists.isEmpty()) result.artist = artists.first();
results << result;
}
}
emit SearchFinished(id, results);
}
void SpotifyCoverProvider::AuthError(const QString &error, const QVariant &debug) {
if (!error.isEmpty()) login_errors_ << error;
for (const QString &e : login_errors_) Error(e);
if (debug.isValid()) qLog(Debug) << debug;
emit AuthenticationFailure(login_errors_);
emit AuthenticationComplete(false, login_errors_);
login_errors_.clear();
}
void SpotifyCoverProvider::Error(const QString &error, const QVariant &debug) {
qLog(Error) << "Spotify:" << error;
if (debug.isValid()) qLog(Debug) << debug;
}
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