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-rw-r--r--src/playlist/plugins/RssPlaylistPlugin.cxx185
1 files changed, 185 insertions, 0 deletions
diff --git a/src/playlist/plugins/RssPlaylistPlugin.cxx b/src/playlist/plugins/RssPlaylistPlugin.cxx
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index 000000000..6f9aad54b
--- /dev/null
+++ b/src/playlist/plugins/RssPlaylistPlugin.cxx
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+/*
+ * 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,
+};