Add Subsonic support (#180)

src/subsonic/subsonicurlhandler.cpp

@@ -0,0 +1,57 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2019, 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 <QObject>
+#include <QString>
+#include <QUrl>
+#include <QUrlQuery>
+
+#include "subsonicservice.h"
+#include "subsonicurlhandler.h"
+
+class Application;
+
+SubsonicUrlHandler::SubsonicUrlHandler(Application *app, SubsonicService *service) : UrlHandler(service), service_(service) {}
+
+UrlHandler::LoadResult SubsonicUrlHandler::StartLoading(const QUrl &url) {
+
+  ParamList params = ParamList() << Param("c", service_->client_name())
+                                 << Param("v", service_->api_version())
+                                 << Param("f", "json")
+                                 << Param("u", service_->username())
+                                 << Param("p", QString("enc:" + service_->password().toUtf8().toHex()))
+                                 << Param("id", url.path());
+
+  QUrlQuery url_query;
+  for (const Param& param : params) {
+    EncodedParam encoded_param(QUrl::toPercentEncoding(param.first), QUrl::toPercentEncoding(param.second));
+    url_query.addQueryItem(encoded_param.first, encoded_param.second);
+  }
+
+  QUrl media_url;
+  media_url.setScheme("https");
+  media_url.setHost(service_->hostname());
+  if (service_->port() > 0 && service_->port() != 443)
+    media_url.setPort(service_->port());
+  media_url.setPath("/rest/stream");
+  media_url.setQuery(url_query);
+
+  return LoadResult(url, LoadResult::TrackAvailable, media_url);
+
+}