302 lines
9.9 KiB
C++
302 lines
9.9 KiB
C++
/*
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* Strawberry Music Player
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* Copyright 2018, Jonas Kvinge <jonas@jkvinge.net>
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*
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* Strawberry 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 3 of the License, or
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* (at your option) any later version.
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*
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* Strawberry 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
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* along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include <QObject>
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#include <QList>
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#include <QPair>
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#include <QByteArray>
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#include <QString>
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#include <QStringBuilder>
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#include <QUrl>
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#include <QUrlQuery>
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#include <QNetworkRequest>
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#include <QNetworkReply>
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#include <QCryptographicHash>
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#include <QJsonDocument>
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#include <QJsonValue>
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#include <QJsonObject>
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#include <QJsonArray>
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#include "core/application.h"
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#include "core/closure.h"
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#include "core/network.h"
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#include "core/logging.h"
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#include "coverprovider.h"
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#include "albumcoverfetcher.h"
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#include "lastfmcoverprovider.h"
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const char *LastFmCoverProvider::kUrl = "https://ws.audioscrobbler.com/2.0/";
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const char *LastFmCoverProvider::kApiKey = "211990b4c96782c05d1536e7219eb56e";
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const char *LastFmCoverProvider::kSecret = "80fd738f49596e9709b1bf9319c444a8";
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LastFmCoverProvider::LastFmCoverProvider(Application *app, QObject *parent) : CoverProvider("last.fm", 1.0, true, app, parent), network_(new NetworkAccessManager(this)) {}
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bool LastFmCoverProvider::StartSearch(const QString &artist, const QString &album, int id) {
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typedef QPair<QString, QString> Param;
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typedef QPair<QByteArray, QByteArray> EncodedParam;
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typedef QList<Param> ParamList;
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ParamList params = ParamList()
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<< Param("album", QString(artist + " " + album))
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<< Param("api_key", kApiKey)
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<< Param("lang", QLocale().name().left(2).toLower())
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<< Param("method", "album.search");
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QUrlQuery url_query;
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QString data_to_sign;
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for (const Param ¶m : params) {
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EncodedParam encoded_param(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
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url_query.addQueryItem(encoded_param.first, encoded_param.second);
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data_to_sign += param.first + param.second;
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}
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data_to_sign += kSecret;
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QByteArray const digest = QCryptographicHash::hash(data_to_sign.toUtf8(), QCryptographicHash::Md5);
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QString signature = QString::fromLatin1(digest.toHex()).rightJustified(32, '0').toLower();
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url_query.addQueryItem(QUrl::toPercentEncoding("api_sig"), QUrl::toPercentEncoding(signature));
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url_query.addQueryItem(QUrl::toPercentEncoding("format"), QUrl::toPercentEncoding("json"));
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QUrl url(kUrl);
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QNetworkRequest req(url);
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req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
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QNetworkReply *reply = network_->post(req, url_query.toString(QUrl::FullyEncoded).toUtf8());
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NewClosure(reply, SIGNAL(finished()), this, SLOT(QueryFinished(QNetworkReply*, int)), reply, id);
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return true;
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}
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void LastFmCoverProvider::QueryFinished(QNetworkReply *reply, int id) {
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reply->deleteLater();
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CoverSearchResults results;
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QByteArray data = GetReplyData(reply);
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if (data.isEmpty()) {
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emit SearchFinished(id, results);
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return;
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}
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QJsonValue json_value = ExtractResults(data);
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if (!json_value.isObject()) {
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emit SearchFinished(id, results);
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return;
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}
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QJsonObject json_results = json_value.toObject();
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if (json_results.isEmpty()) {
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Error("Json object is empty.", json_value);
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emit SearchFinished(id, results);
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return;
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}
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if (!json_results.contains("albummatches")) {
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Error("Json results is missing albummatches.", json_results);
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emit SearchFinished(id, results);
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return;
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}
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QJsonValue json_matches = json_results["albummatches"];
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if (!json_matches.isObject()) {
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Error("Json albummatches is not an object.", json_matches);
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emit SearchFinished(id, results);
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return;
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}
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QJsonObject json_obj_matches = json_matches.toObject();
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if (json_obj_matches.isEmpty()) {
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Error("Json albummatches object is empty.", json_matches);
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emit SearchFinished(id, results);
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return;
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}
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if (!json_obj_matches.contains("album")) {
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Error("Json albummatches is missing album.", json_obj_matches);
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emit SearchFinished(id, results);
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return;
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}
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QJsonValue json_album = json_obj_matches["album"];
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if (!json_album.isArray()) {
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Error("Json album is not an array.", json_album);
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emit SearchFinished(id, results);
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return;
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}
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QJsonArray json_array = json_album.toArray();
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for (const QJsonValue &value : json_array) {
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if (!value.isObject()) {
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Error("Invalid Json reply, album value is not an object.", value);
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continue;
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}
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QJsonObject json_obj = value.toObject();
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if (!json_obj.contains("artist") || !json_obj.contains("image") || !json_obj.contains("name")) {
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Error("Invalid Json reply, album is missing artist, image or name.", json_obj);
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continue;
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}
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QString artist = json_obj["artist"].toString();
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QString album = json_obj["name"].toString();
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QJsonValue json_image = json_obj["image"];
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if (!json_image.isArray()) {
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Error("Invalid Json reply, album image is not an array.", json_image);
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continue;
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}
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QJsonArray json_array_image = json_image.toArray();
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QUrl url;
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LastFmImageSize size(LastFmImageSize::Unknown);
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for (QJsonValue json_value_image : json_array_image) {
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if (!json_value_image.isObject()) {
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Error("Invalid Json reply, album image value is not an object.", json_value_image);
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continue;
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}
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QJsonObject json_object_image = json_value_image.toObject();
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if (!json_object_image.contains("#text") || !json_object_image.contains("size")) {
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Error("Invalid Json reply, album image value is missing #text or size.", json_object_image);
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continue;
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}
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QString image_url = json_object_image["#text"].toString();
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LastFmImageSize image_size = ImageSizeFromString(json_object_image["size"].toString().toLower());
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if (url.isEmpty() || image_size > size) {
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url.setUrl(image_url);
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size = image_size;
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}
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}
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if (url.isEmpty()) continue;
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CoverSearchResult cover_result;
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cover_result.artist = artist;
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cover_result.album = album;
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cover_result.image_url = url;
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results << cover_result;
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}
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emit SearchFinished(id, results);
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}
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QByteArray LastFmCoverProvider::GetReplyData(QNetworkReply *reply) {
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QByteArray data;
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if (reply->error() == QNetworkReply::NoError && reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200) {
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data = reply->readAll();
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}
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else {
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if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
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// This is a network error, there is nothing more to do.
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Error(QString("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
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}
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else {
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// See if there is Json data containing "error" and "message" - then use that instead.
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data = reply->readAll();
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QString error;
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QJsonParseError json_error;
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QJsonDocument json_doc = QJsonDocument::fromJson(data, &json_error);
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if (json_error.error == QJsonParseError::NoError && !json_doc.isNull() && !json_doc.isEmpty() && json_doc.isObject()) {
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QJsonObject json_obj = json_doc.object();
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if (json_obj.contains("error") && json_obj.contains("message")) {
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int code = json_obj["error"].toInt();
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QString message = json_obj["message"].toString();
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error = "Error: " + QString::number(code) + ": " + message;
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}
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}
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if (error.isEmpty()) {
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if (reply->error() != QNetworkReply::NoError) {
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error = QString("%1 (%2)").arg(reply->errorString()).arg(reply->error());
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}
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else {
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error = QString("Received HTTP code %1").arg(reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt());
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}
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}
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Error(error);
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}
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return QByteArray();
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}
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return data;
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}
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QJsonObject LastFmCoverProvider::ExtractJsonObj(const QByteArray &data) {
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QJsonParseError error;
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QJsonDocument json_doc = QJsonDocument::fromJson(data, &error);
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if (error.error != QJsonParseError::NoError) {
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Error("Reply from server missing Json data.", data);
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return QJsonObject();
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}
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if (json_doc.isNull() || json_doc.isEmpty()) {
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Error("Received empty Json document.", json_doc);
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return QJsonObject();
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}
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if (!json_doc.isObject()) {
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Error("Json document is not an object.", json_doc);
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return QJsonObject();
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}
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QJsonObject json_obj = json_doc.object();
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if (json_obj.isEmpty()) {
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Error("Received empty Json object.", json_doc);
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return QJsonObject();
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}
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return json_obj;
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}
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QJsonValue LastFmCoverProvider::ExtractResults(const QByteArray &data) {
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QJsonObject json_obj = ExtractJsonObj(data);
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if (json_obj.isEmpty()) return QJsonObject();
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if (json_obj.contains("results")) {
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QJsonValue json_results = json_obj["results"];
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return json_results;
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}
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else if (json_obj.contains("error") && json_obj.contains("message")) {
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int error = json_obj["error"].toInt();
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QString message = json_obj["message"].toString();
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Error(QString("Error: %1: %2").arg(QString::number(error)).arg(message));
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}
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else {
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Error(QString("Json reply is missing results."), json_obj);
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}
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return QJsonValue();
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}
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void LastFmCoverProvider::Error(QString error, QVariant debug) {
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qLog(Error) << "LastFm:" << error;
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if (debug.isValid()) qLog(Debug) << debug;
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}
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LastFmCoverProvider::LastFmImageSize LastFmCoverProvider::ImageSizeFromString(const QString size) {
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if (size == "small") return LastFmImageSize::Small;
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else if (size == "medium") return LastFmImageSize::Medium;
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else if (size == "large") return LastFmImageSize::Large;
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else if (size == "extralarge") return LastFmImageSize::ExtraLarge;
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else return LastFmImageSize::Unknown;
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}
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