1 files changed, 185 insertions, 0 deletions
diff --git a/src/playlist/plugins/RssPlaylistPlugin.cxx b/src/playlist/plugins/RssPlaylistPlugin.cxx
new file mode 100644
index 000000000..6f9aad54b
--- /dev/null
+++ b/src/playlist/plugins/RssPlaylistPlugin.cxx
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2003-2014 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 "config.h"
+#include "RssPlaylistPlugin.hxx"
+#include "../PlaylistPlugin.hxx"
+#include "../MemorySongEnumerator.hxx"
+#include "tag/TagBuilder.hxx"
+#include "util/ASCII.hxx"
+#include "util/Error.hxx"
+#include "lib/expat/ExpatParser.hxx"
+#include "Log.hxx"
+
+/**
+ * This is the state object for the GLib XML parser.
+ */
+struct RssParser {
+	/**
+	 * The list of songs (in reverse order because that's faster
+	 * while adding).
+	 */
+	std::forward_list<DetachedSong> songs;
+
+	/**
+	 * The current position in the XML file.
+	 */
+	enum {
+		ROOT, ITEM,
+	} state;
+
+	/**
+	 * The current tag within the "entry" element.  This is only
+	 * valid if state==ITEM.  TAG_NUM_OF_ITEM_TYPES means there
+	 * is no (known) tag.
+	 */
+	TagType tag_type;
+
+	/**
+	 * The current song URI.  It is set by the "enclosure"
+	 * element.
+	 */
+	std::string location;
+
+	TagBuilder tag_builder;
+
+	RssParser()
+		:state(ROOT) {}
+};
+
+static void XMLCALL
+rss_start_element(void *user_data, const XML_Char *element_name,
+		  const XML_Char **atts)
+{
+	RssParser *parser = (RssParser *)user_data;
+
+	switch (parser->state) {
+	case RssParser::ROOT:
+		if (StringEqualsCaseASCII(element_name, "item")) {
+			parser->state = RssParser::ITEM;
+			parser->location.clear();
+			parser->tag_type = TAG_NUM_OF_ITEM_TYPES;
+		}
+
+		break;
+
+	case RssParser::ITEM:
+		if (StringEqualsCaseASCII(element_name, "enclosure")) {
+			const char *href =
+				ExpatParser::GetAttributeCase(atts, "url");
+			if (href != nullptr)
+				parser->location = href;
+		} else if (StringEqualsCaseASCII(element_name, "title"))
+			parser->tag_type = TAG_TITLE;
+		else if (StringEqualsCaseASCII(element_name, "itunes:author"))
+			parser->tag_type = TAG_ARTIST;
+
+		break;
+	}
+}
+
+static void XMLCALL
+rss_end_element(void *user_data, const XML_Char *element_name)
+{
+	RssParser *parser = (RssParser *)user_data;
+
+	switch (parser->state) {
+	case RssParser::ROOT:
+		break;
+
+	case RssParser::ITEM:
+		if (StringEqualsCaseASCII(element_name, "item")) {
+			if (!parser->location.empty())
+				parser->songs.emplace_front(std::move(parser->location),
+							    parser->tag_builder.Commit());
+
+			parser->state = RssParser::ROOT;
+		} else
+			parser->tag_type = TAG_NUM_OF_ITEM_TYPES;
+
+		break;
+	}
+}
+
+static void XMLCALL
+rss_char_data(void *user_data, const XML_Char *s, int len)
+{
+	RssParser *parser = (RssParser *)user_data;
+
+	switch (parser->state) {
+	case RssParser::ROOT:
+		break;
+
+	case RssParser::ITEM:
+		if (parser->tag_type != TAG_NUM_OF_ITEM_TYPES)
+			parser->tag_builder.AddItem(parser->tag_type, s, len);
+
+		break;
+	}
+}
+
+/*
+ * The playlist object
+ *
+ */
+
+static SongEnumerator *
+rss_open_stream(InputStream &is)
+{
+	RssParser parser;
+
+	{
+		ExpatParser expat(&parser);
+		expat.SetElementHandler(rss_start_element, rss_end_element);
+		expat.SetCharacterDataHandler(rss_char_data);
+
+		Error error;
+		if (!expat.Parse(is, error)) {
+			LogError(error);
+			return nullptr;
+		}
+	}
+
+	parser.songs.reverse();
+	return new MemorySongEnumerator(std::move(parser.songs));
+}
+
+static const char *const rss_suffixes[] = {
+	"rss",
+	nullptr
+};
+
+static const char *const rss_mime_types[] = {
+	"application/rss+xml",
+	"text/xml",
+	nullptr
+};
+
+const struct playlist_plugin rss_playlist_plugin = {
+	"rss",
+
+	nullptr,
+	nullptr,
+	nullptr,
+	rss_open_stream,
+
+	nullptr,
+	rss_suffixes,
+	rss_mime_types,
+};