diff options
Diffstat (limited to 'src/db/plugins')
28 files changed, 4790 insertions, 0 deletions
diff --git a/src/db/plugins/LazyDatabase.cxx b/src/db/plugins/LazyDatabase.cxx new file mode 100644 index 000000000..bc52395c5 --- /dev/null +++ b/src/db/plugins/LazyDatabase.cxx @@ -0,0 +1,108 @@ +/* + * 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 "LazyDatabase.hxx" +#include "db/Interface.hxx" + +#include <assert.h> + +LazyDatabase::LazyDatabase(Database *_db) + :Database(_db->GetPlugin()), db(_db), open(false) {} + +LazyDatabase::~LazyDatabase() +{ + assert(!open); + + delete db; +} + +bool +LazyDatabase::EnsureOpen(Error &error) const +{ + if (open) + return true; + + if (!db->Open(error)) + return false; + + open = true; + return true; +} + +void +LazyDatabase::Close() +{ + if (open) { + open = false; + db->Close(); + } +} + +const LightSong * +LazyDatabase::GetSong(const char *uri, Error &error) const +{ + return EnsureOpen(error) + ? db->GetSong(uri, error) + : nullptr; +} + +void +LazyDatabase::ReturnSong(const LightSong *song) const +{ + assert(open); + + db->ReturnSong(song); +} + +bool +LazyDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + return EnsureOpen(error) && + db->Visit(selection, visit_directory, visit_song, + visit_playlist, error); +} + +bool +LazyDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + return EnsureOpen(error) && + db->VisitUniqueTags(selection, tag_type, group_mask, visit_tag, + error); +} + +bool +LazyDatabase::GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) const +{ + return EnsureOpen(error) && db->GetStats(selection, stats, error); +} + +time_t +LazyDatabase::GetUpdateStamp() const +{ + return open ? db->GetUpdateStamp() : 0; +} diff --git a/src/db/plugins/LazyDatabase.hxx b/src/db/plugins/LazyDatabase.hxx new file mode 100644 index 000000000..ae1b961d0 --- /dev/null +++ b/src/db/plugins/LazyDatabase.hxx @@ -0,0 +1,69 @@ +/* + * 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. + */ + +#ifndef MPD_LAZY_DATABASE_PLUGIN_HXX +#define MPD_LAZY_DATABASE_PLUGIN_HXX + +#include "db/Interface.hxx" +#include "Compiler.h" + +/** + * A wrapper for a #Database object that gets opened on the first + * database access. This works around daemonization problems with + * some plugins. + */ +class LazyDatabase final : public Database { + Database *const db; + + mutable bool open; + +public: + gcc_nonnull_all + LazyDatabase(Database *_db); + + virtual ~LazyDatabase(); + + virtual void Close() override; + + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; + + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const override; + + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + + virtual time_t GetUpdateStamp() const override; + +private: + bool EnsureOpen(Error &error) const; +}; + +#endif diff --git a/src/db/plugins/ProxyDatabasePlugin.cxx b/src/db/plugins/ProxyDatabasePlugin.cxx new file mode 100644 index 000000000..0b358c0ba --- /dev/null +++ b/src/db/plugins/ProxyDatabasePlugin.cxx @@ -0,0 +1,835 @@ +/* + * 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 "ProxyDatabasePlugin.hxx" +#include "db/Interface.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/DatabaseListener.hxx" +#include "db/Selection.hxx" +#include "db/DatabaseError.hxx" +#include "db/PlaylistInfo.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Stats.hxx" +#include "SongFilter.hxx" +#include "Compiler.h" +#include "config/ConfigData.hxx" +#include "tag/TagBuilder.hxx" +#include "tag/Tag.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "protocol/Ack.hxx" +#include "event/SocketMonitor.hxx" +#include "event/IdleMonitor.hxx" +#include "Log.hxx" + +#include <mpd/client.h> +#include <mpd/async.h> + +#include <cassert> +#include <string> +#include <list> + +class ProxySong : public LightSong { + Tag tag2; + +public: + explicit ProxySong(const mpd_song *song); +}; + +class AllocatedProxySong : public ProxySong { + mpd_song *const song; + +public: + explicit AllocatedProxySong(mpd_song *_song) + :ProxySong(_song), song(_song) {} + + ~AllocatedProxySong() { + mpd_song_free(song); + } +}; + +class ProxyDatabase final : public Database, SocketMonitor, IdleMonitor { + DatabaseListener &listener; + + std::string host; + unsigned port; + + struct mpd_connection *connection; + + /* this is mutable because GetStats() must be "const" */ + mutable time_t update_stamp; + + /** + * The libmpdclient idle mask that was removed from the other + * MPD. This will be handled by the next OnIdle() call. + */ + unsigned idle_received; + + /** + * Is the #connection currently "idle"? That is, did we send + * the "idle" command to it? + */ + bool is_idle; + +public: + ProxyDatabase(EventLoop &_loop, DatabaseListener &_listener) + :Database(proxy_db_plugin), + SocketMonitor(_loop), IdleMonitor(_loop), + listener(_listener) {} + + static Database *Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); + + virtual bool Open(Error &error) override; + virtual void Close() override; + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; + + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const override; + + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + + virtual unsigned Update(const char *uri_utf8, bool discard, + Error &error) override; + + virtual time_t GetUpdateStamp() const override { + return update_stamp; + } + +private: + bool Configure(const config_param ¶m, Error &error); + + bool Connect(Error &error); + bool CheckConnection(Error &error); + bool EnsureConnected(Error &error); + + void Disconnect(); + + /* virtual methods from SocketMonitor */ + virtual bool OnSocketReady(unsigned flags) override; + + /* virtual methods from IdleMonitor */ + virtual void OnIdle() override; +}; + +static constexpr Domain libmpdclient_domain("libmpdclient"); + +static constexpr struct { + TagType d; + enum mpd_tag_type s; +} tag_table[] = { + { TAG_ARTIST, MPD_TAG_ARTIST }, + { TAG_ALBUM, MPD_TAG_ALBUM }, + { TAG_ALBUM_ARTIST, MPD_TAG_ALBUM_ARTIST }, + { TAG_TITLE, MPD_TAG_TITLE }, + { TAG_TRACK, MPD_TAG_TRACK }, + { TAG_NAME, MPD_TAG_NAME }, + { TAG_GENRE, MPD_TAG_GENRE }, + { TAG_DATE, MPD_TAG_DATE }, + { TAG_COMPOSER, MPD_TAG_COMPOSER }, + { TAG_PERFORMER, MPD_TAG_PERFORMER }, + { TAG_COMMENT, MPD_TAG_COMMENT }, + { TAG_DISC, MPD_TAG_DISC }, + { TAG_MUSICBRAINZ_ARTISTID, MPD_TAG_MUSICBRAINZ_ARTISTID }, + { TAG_MUSICBRAINZ_ALBUMID, MPD_TAG_MUSICBRAINZ_ALBUMID }, + { TAG_MUSICBRAINZ_ALBUMARTISTID, + MPD_TAG_MUSICBRAINZ_ALBUMARTISTID }, + { TAG_MUSICBRAINZ_TRACKID, MPD_TAG_MUSICBRAINZ_TRACKID }, + { TAG_NUM_OF_ITEM_TYPES, MPD_TAG_COUNT } +}; + +static void +Copy(TagBuilder &tag, TagType d_tag, + const struct mpd_song *song, enum mpd_tag_type s_tag) +{ + + for (unsigned i = 0;; ++i) { + const char *value = mpd_song_get_tag(song, s_tag, i); + if (value == nullptr) + break; + + tag.AddItem(d_tag, value); + } +} + +ProxySong::ProxySong(const mpd_song *song) +{ + directory = nullptr; + uri = mpd_song_get_uri(song); + real_uri = nullptr; + tag = &tag2; + mtime = mpd_song_get_last_modified(song); + +#if LIBMPDCLIENT_CHECK_VERSION(2,3,0) + start_ms = mpd_song_get_start(song) * 1000; + end_ms = mpd_song_get_end(song) * 1000; +#else + start_ms = end_ms = 0; +#endif + + TagBuilder tag_builder; + tag_builder.SetTime(mpd_song_get_duration(song)); + + for (const auto *i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i) + Copy(tag_builder, i->d, song, i->s); + + tag_builder.Commit(tag2); +} + +gcc_const +static enum mpd_tag_type +Convert(TagType tag_type) +{ + for (auto i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i) + if (i->d == tag_type) + return i->s; + + return MPD_TAG_COUNT; +} + +static bool +CheckError(struct mpd_connection *connection, Error &error) +{ + const auto code = mpd_connection_get_error(connection); + if (code == MPD_ERROR_SUCCESS) + return true; + + if (code == MPD_ERROR_SERVER) { + /* libmpdclient's "enum mpd_server_error" is the same + as our "enum ack" */ + const auto server_error = + mpd_connection_get_server_error(connection); + error.Set(ack_domain, (int)server_error, + mpd_connection_get_error_message(connection)); + } else { + error.Set(libmpdclient_domain, (int)code, + mpd_connection_get_error_message(connection)); + } + + mpd_connection_clear_error(connection); + return false; +} + +static bool +SendConstraints(mpd_connection *connection, const SongFilter::Item &item) +{ + switch (item.GetTag()) { + mpd_tag_type tag; + +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + case LOCATE_TAG_BASE_TYPE: + if (mpd_connection_cmp_server_version(connection, 0, 18, 0) < 0) + /* requires MPD 0.18 */ + return true; + + return mpd_search_add_base_constraint(connection, + MPD_OPERATOR_DEFAULT, + item.GetValue().c_str()); +#endif + + case LOCATE_TAG_FILE_TYPE: + return mpd_search_add_uri_constraint(connection, + MPD_OPERATOR_DEFAULT, + item.GetValue().c_str()); + + case LOCATE_TAG_ANY_TYPE: + return mpd_search_add_any_tag_constraint(connection, + MPD_OPERATOR_DEFAULT, + item.GetValue().c_str()); + + default: + tag = Convert(TagType(item.GetTag())); + if (tag == MPD_TAG_COUNT) + return true; + + return mpd_search_add_tag_constraint(connection, + MPD_OPERATOR_DEFAULT, + tag, + item.GetValue().c_str()); + } +} + +static bool +SendConstraints(mpd_connection *connection, const SongFilter &filter) +{ + for (const auto &i : filter.GetItems()) + if (!SendConstraints(connection, i)) + return false; + + return true; +} + +static bool +SendConstraints(mpd_connection *connection, const DatabaseSelection &selection) +{ +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + if (!selection.uri.empty() && + mpd_connection_cmp_server_version(connection, 0, 18, 0) >= 0) { + /* requires MPD 0.18 */ + if (!mpd_search_add_base_constraint(connection, + MPD_OPERATOR_DEFAULT, + selection.uri.c_str())) + return false; + } +#endif + + if (selection.filter != nullptr && + !SendConstraints(connection, *selection.filter)) + return false; + + return true; +} + +Database * +ProxyDatabase::Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + ProxyDatabase *db = new ProxyDatabase(loop, listener); + if (!db->Configure(param, error)) { + delete db; + db = nullptr; + } + + return db; +} + +bool +ProxyDatabase::Configure(const config_param ¶m, gcc_unused Error &error) +{ + host = param.GetBlockValue("host", ""); + port = param.GetBlockValue("port", 0u); + + return true; +} + +bool +ProxyDatabase::Open(Error &error) +{ + if (!Connect(error)) + return false; + + update_stamp = 0; + + return true; +} + +void +ProxyDatabase::Close() +{ + if (connection != nullptr) + Disconnect(); +} + +bool +ProxyDatabase::Connect(Error &error) +{ + const char *_host = host.empty() ? nullptr : host.c_str(); + connection = mpd_connection_new(_host, port, 0); + if (connection == nullptr) { + error.Set(libmpdclient_domain, (int)MPD_ERROR_OOM, + "Out of memory"); + return false; + } + + if (!CheckError(connection, error)) { + mpd_connection_free(connection); + connection = nullptr; + + return false; + } + + idle_received = unsigned(-1); + is_idle = false; + + SocketMonitor::Open(mpd_async_get_fd(mpd_connection_get_async(connection))); + IdleMonitor::Schedule(); + + return true; +} + +bool +ProxyDatabase::CheckConnection(Error &error) +{ + assert(connection != nullptr); + + if (!mpd_connection_clear_error(connection)) { + Disconnect(); + return Connect(error); + } + + if (is_idle) { + unsigned idle = mpd_run_noidle(connection); + if (idle == 0 && !CheckError(connection, error)) { + Disconnect(); + return false; + } + + idle_received |= idle; + is_idle = false; + IdleMonitor::Schedule(); + } + + return true; +} + +bool +ProxyDatabase::EnsureConnected(Error &error) +{ + return connection != nullptr + ? CheckConnection(error) + : Connect(error); +} + +void +ProxyDatabase::Disconnect() +{ + assert(connection != nullptr); + + IdleMonitor::Cancel(); + SocketMonitor::Steal(); + + mpd_connection_free(connection); + connection = nullptr; +} + +bool +ProxyDatabase::OnSocketReady(gcc_unused unsigned flags) +{ + assert(connection != nullptr); + + if (!is_idle) { + // TODO: can this happen? + IdleMonitor::Schedule(); + return false; + } + + unsigned idle = (unsigned)mpd_recv_idle(connection, false); + if (idle == 0) { + Error error; + if (!CheckError(connection, error)) { + LogError(error); + Disconnect(); + return false; + } + } + + /* let OnIdle() handle this */ + idle_received |= idle; + is_idle = false; + IdleMonitor::Schedule(); + return false; +} + +void +ProxyDatabase::OnIdle() +{ + assert(connection != nullptr); + + /* handle previous idle events */ + + if (idle_received & MPD_IDLE_DATABASE) + listener.OnDatabaseModified(); + + idle_received = 0; + + /* send a new idle command to the other MPD */ + + if (is_idle) + // TODO: can this happen? + return; + + if (!mpd_send_idle_mask(connection, MPD_IDLE_DATABASE)) { + Error error; + if (!CheckError(connection, error)) + LogError(error); + + SocketMonitor::Steal(); + mpd_connection_free(connection); + connection = nullptr; + return; + } + + is_idle = true; + SocketMonitor::ScheduleRead(); +} + +const LightSong * +ProxyDatabase::GetSong(const char *uri, Error &error) const +{ + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + if (!mpd_send_list_meta(connection, uri)) { + CheckError(connection, error); + return nullptr; + } + + struct mpd_song *song = mpd_recv_song(connection); + if (!mpd_response_finish(connection) && + !CheckError(connection, error)) { + if (song != nullptr) + mpd_song_free(song); + return nullptr; + } + + if (song == nullptr) { + error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri); + return nullptr; + } + + return new AllocatedProxySong(song); +} + +void +ProxyDatabase::ReturnSong(const LightSong *_song) const +{ + assert(_song != nullptr); + + AllocatedProxySong *song = (AllocatedProxySong *) + const_cast<LightSong *>(_song); + delete song; +} + +static bool +Visit(struct mpd_connection *connection, const char *uri, + bool recursive, const SongFilter *filter, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, Error &error); + +static bool +Visit(struct mpd_connection *connection, + bool recursive, const SongFilter *filter, + const struct mpd_directory *directory, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, Error &error) +{ + const char *path = mpd_directory_get_path(directory); +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + time_t mtime = mpd_directory_get_last_modified(directory); +#else + time_t mtime = 0; +#endif + + if (visit_directory && + !visit_directory(LightDirectory(path, mtime), error)) + return false; + + if (recursive && + !Visit(connection, path, recursive, filter, + visit_directory, visit_song, visit_playlist, error)) + return false; + + return true; +} + +gcc_pure +static bool +Match(const SongFilter *filter, const LightSong &song) +{ + return filter == nullptr || filter->Match(song); +} + +static bool +Visit(const SongFilter *filter, + const mpd_song *_song, + VisitSong visit_song, Error &error) +{ + if (!visit_song) + return true; + + const ProxySong song(_song); + return !Match(filter, song) || visit_song(song, error); +} + +static bool +Visit(const struct mpd_playlist *playlist, + VisitPlaylist visit_playlist, Error &error) +{ + if (!visit_playlist) + return true; + + PlaylistInfo p(mpd_playlist_get_path(playlist), + mpd_playlist_get_last_modified(playlist)); + + return visit_playlist(p, LightDirectory::Root(), error); +} + +class ProxyEntity { + struct mpd_entity *entity; + +public: + explicit ProxyEntity(struct mpd_entity *_entity) + :entity(_entity) {} + + ProxyEntity(const ProxyEntity &other) = delete; + + ProxyEntity(ProxyEntity &&other) + :entity(other.entity) { + other.entity = nullptr; + } + + ~ProxyEntity() { + if (entity != nullptr) + mpd_entity_free(entity); + } + + ProxyEntity &operator=(const ProxyEntity &other) = delete; + + operator const struct mpd_entity *() const { + return entity; + } +}; + +static std::list<ProxyEntity> +ReceiveEntities(struct mpd_connection *connection) +{ + std::list<ProxyEntity> entities; + struct mpd_entity *entity; + while ((entity = mpd_recv_entity(connection)) != nullptr) + entities.push_back(ProxyEntity(entity)); + + mpd_response_finish(connection); + return entities; +} + +static bool +Visit(struct mpd_connection *connection, const char *uri, + bool recursive, const SongFilter *filter, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, Error &error) +{ + if (!mpd_send_list_meta(connection, uri)) + return CheckError(connection, error); + + std::list<ProxyEntity> entities(ReceiveEntities(connection)); + if (!CheckError(connection, error)) + return false; + + for (const auto &entity : entities) { + switch (mpd_entity_get_type(entity)) { + case MPD_ENTITY_TYPE_UNKNOWN: + break; + + case MPD_ENTITY_TYPE_DIRECTORY: + if (!Visit(connection, recursive, filter, + mpd_entity_get_directory(entity), + visit_directory, visit_song, visit_playlist, + error)) + return false; + break; + + case MPD_ENTITY_TYPE_SONG: + if (!Visit(filter, + mpd_entity_get_song(entity), visit_song, + error)) + return false; + break; + + case MPD_ENTITY_TYPE_PLAYLIST: + if (!Visit(mpd_entity_get_playlist(entity), + visit_playlist, error)) + return false; + break; + } + } + + return CheckError(connection, error); +} + +static bool +SearchSongs(struct mpd_connection *connection, + const DatabaseSelection &selection, + VisitSong visit_song, + Error &error) +{ + assert(selection.recursive); + assert(visit_song); + + const bool exact = selection.filter == nullptr || + !selection.filter->HasFoldCase(); + + if (!mpd_search_db_songs(connection, exact) || + !SendConstraints(connection, selection) || + !mpd_search_commit(connection)) + return CheckError(connection, error); + + bool result = true; + struct mpd_song *song; + while (result && (song = mpd_recv_song(connection)) != nullptr) { + AllocatedProxySong song2(song); + + result = !Match(selection.filter, song2) || + visit_song(song2, error); + } + + mpd_response_finish(connection); + return result && CheckError(connection, error); +} + +/** + * Check whether we can use the "base" constraint. Requires + * libmpdclient 2.9 and MPD 0.18. + */ +gcc_pure +static bool +ServerSupportsSearchBase(const struct mpd_connection *connection) +{ +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + return mpd_connection_cmp_server_version(connection, 0, 18, 0) >= 0; +#else + (void)connection; + + return false; +#endif +} + +bool +ProxyDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + if (!visit_directory && !visit_playlist && selection.recursive && + (ServerSupportsSearchBase(connection) + ? !selection.IsEmpty() + : selection.HasOtherThanBase())) + /* this optimized code path can only be used under + certain conditions */ + return ::SearchSongs(connection, selection, visit_song, error); + + /* fall back to recursive walk (slow!) */ + return ::Visit(connection, selection.uri.c_str(), + selection.recursive, selection.filter, + visit_directory, visit_song, visit_playlist, + error); +} + +bool +ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, + gcc_unused uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + enum mpd_tag_type tag_type2 = Convert(tag_type); + if (tag_type2 == MPD_TAG_COUNT) { + error.Set(libmpdclient_domain, "Unsupported tag"); + return false; + } + + if (!mpd_search_db_tags(connection, tag_type2)) + return CheckError(connection, error); + + if (!SendConstraints(connection, selection)) + return CheckError(connection, error); + + // TODO: use group_mask + + if (!mpd_search_commit(connection)) + return CheckError(connection, error); + + bool result = true; + + struct mpd_pair *pair; + while (result && + (pair = mpd_recv_pair_tag(connection, tag_type2)) != nullptr) { + TagBuilder tag; + tag.AddItem(tag_type, pair->value); + result = visit_tag(tag.Commit(), error); + mpd_return_pair(connection, pair); + } + + return mpd_response_finish(connection) && + CheckError(connection, error) && + result; +} + +bool +ProxyDatabase::GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) const +{ + // TODO: match + (void)selection; + + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + struct mpd_stats *stats2 = + mpd_run_stats(connection); + if (stats2 == nullptr) + return CheckError(connection, error); + + update_stamp = (time_t)mpd_stats_get_db_update_time(stats2); + + stats.song_count = mpd_stats_get_number_of_songs(stats2); + stats.total_duration = mpd_stats_get_db_play_time(stats2); + stats.artist_count = mpd_stats_get_number_of_artists(stats2); + stats.album_count = mpd_stats_get_number_of_albums(stats2); + mpd_stats_free(stats2); + + return true; +} + +unsigned +ProxyDatabase::Update(const char *uri_utf8, bool discard, + Error &error) +{ + if (!EnsureConnected(error)) + return 0; + + unsigned id = discard + ? mpd_run_rescan(connection, uri_utf8) + : mpd_run_update(connection, uri_utf8); + if (id == 0) + CheckError(connection, error); + + return id; +} + +const DatabasePlugin proxy_db_plugin = { + "proxy", + DatabasePlugin::FLAG_REQUIRE_STORAGE, + ProxyDatabase::Create, +}; diff --git a/src/db/plugins/ProxyDatabasePlugin.hxx b/src/db/plugins/ProxyDatabasePlugin.hxx new file mode 100644 index 000000000..699d374b5 --- /dev/null +++ b/src/db/plugins/ProxyDatabasePlugin.hxx @@ -0,0 +1,27 @@ +/* + * 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. + */ + +#ifndef MPD_PROXY_DATABASE_PLUGIN_HXX +#define MPD_PROXY_DATABASE_PLUGIN_HXX + +struct DatabasePlugin; + +extern const DatabasePlugin proxy_db_plugin; + +#endif diff --git a/src/db/plugins/simple/DatabaseSave.cxx b/src/db/plugins/simple/DatabaseSave.cxx new file mode 100644 index 000000000..c766843b6 --- /dev/null +++ b/src/db/plugins/simple/DatabaseSave.cxx @@ -0,0 +1,160 @@ +/* + * 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 "DatabaseSave.hxx" +#include "db/DatabaseLock.hxx" +#include "db/DatabaseError.hxx" +#include "Directory.hxx" +#include "DirectorySave.hxx" +#include "fs/io/BufferedOutputStream.hxx" +#include "fs/io/TextFile.hxx" +#include "tag/Tag.hxx" +#include "tag/TagSettings.h" +#include "fs/Charset.hxx" +#include "util/StringUtil.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include <string.h> +#include <stdlib.h> + +#define DIRECTORY_INFO_BEGIN "info_begin" +#define DIRECTORY_INFO_END "info_end" +#define DB_FORMAT_PREFIX "format: " +#define DIRECTORY_MPD_VERSION "mpd_version: " +#define DIRECTORY_FS_CHARSET "fs_charset: " +#define DB_TAG_PREFIX "tag: " + +static constexpr unsigned DB_FORMAT = 2; + +/** + * The oldest database format understood by this MPD version. + */ +static constexpr unsigned OLDEST_DB_FORMAT = 1; + +void +db_save_internal(BufferedOutputStream &os, const Directory &music_root) +{ + os.Format("%s\n", DIRECTORY_INFO_BEGIN); + os.Format(DB_FORMAT_PREFIX "%u\n", DB_FORMAT); + os.Format("%s%s\n", DIRECTORY_MPD_VERSION, VERSION); + os.Format("%s%s\n", DIRECTORY_FS_CHARSET, GetFSCharset()); + + for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) + if (!ignore_tag_items[i]) + os.Format(DB_TAG_PREFIX "%s\n", tag_item_names[i]); + + os.Format("%s\n", DIRECTORY_INFO_END); + + directory_save(os, music_root); +} + +bool +db_load_internal(TextFile &file, Directory &music_root, Error &error) +{ + char *line; + unsigned format = 0; + bool found_charset = false, found_version = false; + bool success; + bool tags[TAG_NUM_OF_ITEM_TYPES]; + + /* get initial info */ + line = file.ReadLine(); + if (line == nullptr || strcmp(DIRECTORY_INFO_BEGIN, line) != 0) { + error.Set(db_domain, "Database corrupted"); + return false; + } + + memset(tags, false, sizeof(tags)); + + while ((line = file.ReadLine()) != nullptr && + strcmp(line, DIRECTORY_INFO_END) != 0) { + if (StringStartsWith(line, DB_FORMAT_PREFIX)) { + format = atoi(line + sizeof(DB_FORMAT_PREFIX) - 1); + } else if (StringStartsWith(line, DIRECTORY_MPD_VERSION)) { + if (found_version) { + error.Set(db_domain, "Duplicate version line"); + return false; + } + + found_version = true; + } else if (StringStartsWith(line, DIRECTORY_FS_CHARSET)) { + const char *new_charset; + + if (found_charset) { + error.Set(db_domain, "Duplicate charset line"); + return false; + } + + found_charset = true; + + new_charset = line + sizeof(DIRECTORY_FS_CHARSET) - 1; + const char *const old_charset = GetFSCharset(); + if (*old_charset != 0 + && strcmp(new_charset, old_charset) != 0) { + error.Format(db_domain, + "Existing database has charset " + "\"%s\" instead of \"%s\"; " + "discarding database file", + new_charset, old_charset); + return false; + } + } else if (StringStartsWith(line, DB_TAG_PREFIX)) { + const char *name = line + sizeof(DB_TAG_PREFIX) - 1; + TagType tag = tag_name_parse(name); + if (tag == TAG_NUM_OF_ITEM_TYPES) { + error.Format(db_domain, + "Unrecognized tag '%s', " + "discarding database file", + name); + return false; + } + + tags[tag] = true; + } else { + error.Format(db_domain, "Malformed line: %s", line); + return false; + } + } + + if (format < OLDEST_DB_FORMAT || format > DB_FORMAT) { + error.Set(db_domain, + "Database format mismatch, " + "discarding database file"); + return false; + } + + for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) { + if (!ignore_tag_items[i] && !tags[i]) { + error.Set(db_domain, + "Tag list mismatch, " + "discarding database file"); + return false; + } + } + + LogDebug(db_domain, "reading DB"); + + db_lock(); + success = directory_load(file, music_root, error); + db_unlock(); + + return success; +} diff --git a/src/db/plugins/simple/DatabaseSave.hxx b/src/db/plugins/simple/DatabaseSave.hxx new file mode 100644 index 000000000..bb7f57115 --- /dev/null +++ b/src/db/plugins/simple/DatabaseSave.hxx @@ -0,0 +1,34 @@ +/* + * 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. + */ + +#ifndef MPD_DATABASE_SAVE_HXX +#define MPD_DATABASE_SAVE_HXX + +struct Directory; +class BufferedOutputStream; +class TextFile; +class Error; + +void +db_save_internal(BufferedOutputStream &os, const Directory &root); + +bool +db_load_internal(TextFile &file, Directory &root, Error &error); + +#endif diff --git a/src/db/plugins/simple/Directory.cxx b/src/db/plugins/simple/Directory.cxx new file mode 100644 index 000000000..218652b03 --- /dev/null +++ b/src/db/plugins/simple/Directory.cxx @@ -0,0 +1,277 @@ +/* + * 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 "Directory.hxx" +#include "SongSort.hxx" +#include "Song.hxx" +#include "Mount.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Uri.hxx" +#include "db/DatabaseLock.hxx" +#include "db/Interface.hxx" +#include "SongFilter.hxx" +#include "lib/icu/Collate.hxx" +#include "fs/Traits.hxx" +#include "util/Alloc.hxx" +#include "util/Error.hxx" + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +Directory::Directory(std::string &&_path_utf8, Directory *_parent) + :parent(_parent), + mtime(0), + inode(0), device(0), + path(std::move(_path_utf8)), + mounted_database(nullptr) +{ +} + +Directory::~Directory() +{ + delete mounted_database; + + songs.clear_and_dispose(Song::Disposer()); + children.clear_and_dispose(Disposer()); +} + +void +Directory::Delete() +{ + assert(holding_db_lock()); + assert(parent != nullptr); + + parent->children.erase_and_dispose(parent->children.iterator_to(*this), + Disposer()); +} + +const char * +Directory::GetName() const +{ + assert(!IsRoot()); + + return PathTraitsUTF8::GetBase(path.c_str()); +} + +Directory * +Directory::CreateChild(const char *name_utf8) +{ + assert(holding_db_lock()); + assert(name_utf8 != nullptr); + assert(*name_utf8 != 0); + + std::string path_utf8 = IsRoot() + ? std::string(name_utf8) + : PathTraitsUTF8::Build(GetPath(), name_utf8); + + Directory *child = new Directory(std::move(path_utf8), this); + children.push_back(*child); + return child; +} + +const Directory * +Directory::FindChild(const char *name) const +{ + assert(holding_db_lock()); + + for (const auto &child : children) + if (strcmp(child.GetName(), name) == 0) + return &child; + + return nullptr; +} + +void +Directory::PruneEmpty() +{ + assert(holding_db_lock()); + + for (auto child = children.begin(), end = children.end(); + child != end;) { + child->PruneEmpty(); + + if (child->IsEmpty()) + child = children.erase_and_dispose(child, Disposer()); + else + ++child; + } +} + +Directory::LookupResult +Directory::LookupDirectory(const char *uri) +{ + assert(holding_db_lock()); + assert(uri != nullptr); + + if (isRootDirectory(uri)) + return { this, nullptr }; + + char *duplicated = xstrdup(uri), *name = duplicated; + + Directory *d = this; + while (true) { + char *slash = strchr(name, '/'); + if (slash == name) + break; + + if (slash != nullptr) + *slash = '\0'; + + Directory *tmp = d->FindChild(name); + if (tmp == nullptr) + /* not found */ + break; + + d = tmp; + + if (slash == nullptr) { + /* found everything */ + name = nullptr; + break; + } + + name = slash + 1; + } + + free(duplicated); + + const char *rest = name == nullptr + ? nullptr + : uri + (name - duplicated); + + return { d, rest }; +} + +void +Directory::AddSong(Song *song) +{ + assert(holding_db_lock()); + assert(song != nullptr); + assert(song->parent == this); + + songs.push_back(*song); +} + +void +Directory::RemoveSong(Song *song) +{ + assert(holding_db_lock()); + assert(song != nullptr); + assert(song->parent == this); + + songs.erase(songs.iterator_to(*song)); +} + +const Song * +Directory::FindSong(const char *name_utf8) const +{ + assert(holding_db_lock()); + assert(name_utf8 != nullptr); + + for (auto &song : songs) { + assert(song.parent == this); + + if (strcmp(song.uri, name_utf8) == 0) + return &song; + } + + return nullptr; +} + +gcc_pure +static bool +directory_cmp(const Directory &a, const Directory &b) +{ + return IcuCollate(a.path.c_str(), b.path.c_str()) < 0; +} + +void +Directory::Sort() +{ + assert(holding_db_lock()); + + children.sort(directory_cmp); + song_list_sort(songs); + + for (auto &child : children) + child.Sort(); +} + +bool +Directory::Walk(bool recursive, const SongFilter *filter, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + assert(!error.IsDefined()); + + if (IsMount()) { + assert(IsEmpty()); + + /* TODO: eliminate this unlock/lock; it is necessary + because the child's SimpleDatabasePlugin::Visit() + call will lock it again */ + db_unlock(); + bool result = WalkMount(GetPath(), *mounted_database, + recursive, filter, + visit_directory, visit_song, + visit_playlist, + error); + db_lock(); + return result; + } + + if (visit_song) { + for (auto &song : songs){ + const LightSong song2 = song.Export(); + if ((filter == nullptr || filter->Match(song2)) && + !visit_song(song2, error)) + return false; + } + } + + if (visit_playlist) { + for (const PlaylistInfo &p : playlists) + if (!visit_playlist(p, Export(), error)) + return false; + } + + for (auto &child : children) { + if (visit_directory && + !visit_directory(child.Export(), error)) + return false; + + if (recursive && + !child.Walk(recursive, filter, + visit_directory, visit_song, visit_playlist, + error)) + return false; + } + + return true; +} + +LightDirectory +Directory::Export() const +{ + return LightDirectory(GetPath(), mtime); +} diff --git a/src/db/plugins/simple/Directory.hxx b/src/db/plugins/simple/Directory.hxx new file mode 100644 index 000000000..acef62143 --- /dev/null +++ b/src/db/plugins/simple/Directory.hxx @@ -0,0 +1,285 @@ +/* + * 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. + */ + +#ifndef MPD_DIRECTORY_HXX +#define MPD_DIRECTORY_HXX + +#include "check.h" +#include "Compiler.h" +#include "db/Visitor.hxx" +#include "db/PlaylistVector.hxx" +#include "Song.hxx" + +#include <boost/intrusive/list.hpp> + +#include <string> + +/** + * Virtual directory that is really an archive file or a folder inside + * the archive (special value for Directory::device). + */ +static constexpr unsigned DEVICE_INARCHIVE = -1; + +/** + * Virtual directory that is really a song file with one or more "sub" + * songs as specified by DecoderPlugin::container_scan() (special + * value for Directory::device). + */ +static constexpr unsigned DEVICE_CONTAINER = -2; + +struct db_visitor; +class SongFilter; +class Error; +class Database; + +struct Directory { + static constexpr auto link_mode = boost::intrusive::normal_link; + typedef boost::intrusive::link_mode<link_mode> LinkMode; + typedef boost::intrusive::list_member_hook<LinkMode> Hook; + + struct Disposer { + void operator()(Directory *directory) const { + delete directory; + } + }; + + /** + * Pointers to the siblings of this directory within the + * parent directory. It is unused (undefined) in the root + * directory. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + Hook siblings; + + typedef boost::intrusive::member_hook<Directory, Hook, + &Directory::siblings> SiblingsHook; + typedef boost::intrusive::list<Directory, SiblingsHook, + boost::intrusive::constant_time_size<false>> List; + + /** + * A doubly linked list of child directories. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + List children; + + /** + * A doubly linked list of songs within this directory. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + SongList songs; + + PlaylistVector playlists; + + Directory *parent; + time_t mtime; + unsigned inode, device; + + std::string path; + + /** + * If this is not nullptr, then this directory does not really + * exist, but is a mount point for another #Database. + */ + Database *mounted_database; + +public: + Directory(std::string &&_path_utf8, Directory *_parent); + ~Directory(); + + /** + * Create a new root #Directory object. + */ + gcc_malloc + static Directory *NewRoot() { + return new Directory(std::string(), nullptr); + } + + bool IsMount() const { + return mounted_database != nullptr; + } + + /** + * Remove this #Directory object from its parent and free it. This + * must not be called with the root Directory. + * + * Caller must lock the #db_mutex. + */ + void Delete(); + + /** + * Create a new #Directory object as a child of the given one. + * + * Caller must lock the #db_mutex. + * + * @param name_utf8 the UTF-8 encoded name of the new sub directory + */ + gcc_malloc + Directory *CreateChild(const char *name_utf8); + + /** + * Caller must lock the #db_mutex. + */ + gcc_pure + const Directory *FindChild(const char *name) const; + + gcc_pure + Directory *FindChild(const char *name) { + const Directory *cthis = this; + return const_cast<Directory *>(cthis->FindChild(name)); + } + + /** + * Look up a sub directory, and create the object if it does not + * exist. + * + * Caller must lock the #db_mutex. + */ + Directory *MakeChild(const char *name_utf8) { + Directory *child = FindChild(name_utf8); + if (child == nullptr) + child = CreateChild(name_utf8); + return child; + } + + struct LookupResult { + /** + * The last directory that was found. If the given + * URI could not be resolved at all, then this is the + * root directory. + */ + Directory *directory; + + /** + * The remaining URI part (without leading slash) or + * nullptr if the given URI was consumed completely. + */ + const char *uri; + }; + + /** + * Looks up a directory by its relative URI. + * + * @param uri the relative URI + * @return the Directory, or nullptr if none was found + */ + gcc_pure + LookupResult LookupDirectory(const char *uri); + + gcc_pure + bool IsEmpty() const { + return children.empty() && + songs.empty() && + playlists.empty(); + } + + gcc_pure + const char *GetPath() const { + return path.c_str(); + } + + /** + * Returns the base name of the directory. + */ + gcc_pure + const char *GetName() const; + + /** + * Is this the root directory of the music database? + */ + gcc_pure + bool IsRoot() const { + return parent == nullptr; + } + + template<typename T> + void ForEachChildSafe(T &&t) { + const auto end = children.end(); + for (auto i = children.begin(), next = i; i != end; i = next) { + next = std::next(i); + t(*i); + } + } + + template<typename T> + void ForEachSongSafe(T &&t) { + const auto end = songs.end(); + for (auto i = songs.begin(), next = i; i != end; i = next) { + next = std::next(i); + t(*i); + } + } + + /** + * Look up a song in this directory by its name. + * + * Caller must lock the #db_mutex. + */ + gcc_pure + const Song *FindSong(const char *name_utf8) const; + + gcc_pure + Song *FindSong(const char *name_utf8) { + const Directory *cthis = this; + return const_cast<Song *>(cthis->FindSong(name_utf8)); + } + + /** + * Add a song object to this directory. Its "parent" attribute must + * be set already. + */ + void AddSong(Song *song); + + /** + * Remove a song object from this directory (which effectively + * invalidates the song object, because the "parent" attribute becomes + * stale), but does not free it. + */ + void RemoveSong(Song *song); + + /** + * Caller must lock the #db_mutex. + */ + void PruneEmpty(); + + /** + * Sort all directory entries recursively. + * + * Caller must lock the #db_mutex. + */ + void Sort(); + + /** + * Caller must lock #db_mutex. + */ + bool Walk(bool recursive, const SongFilter *match, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const; + + gcc_pure + LightDirectory Export() const; +}; + +#endif diff --git a/src/db/plugins/simple/DirectorySave.cxx b/src/db/plugins/simple/DirectorySave.cxx new file mode 100644 index 000000000..e1650cbe8 --- /dev/null +++ b/src/db/plugins/simple/DirectorySave.cxx @@ -0,0 +1,207 @@ +/* + * 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 "DirectorySave.hxx" +#include "Directory.hxx" +#include "Song.hxx" +#include "SongSave.hxx" +#include "DetachedSong.hxx" +#include "PlaylistDatabase.hxx" +#include "fs/io/TextFile.hxx" +#include "fs/io/BufferedOutputStream.hxx" +#include "util/StringUtil.hxx" +#include "util/NumberParser.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" + +#include <stddef.h> +#include <string.h> + +#define DIRECTORY_DIR "directory: " +#define DIRECTORY_TYPE "type: " +#define DIRECTORY_MTIME "mtime: " +#define DIRECTORY_BEGIN "begin: " +#define DIRECTORY_END "end: " + +static constexpr Domain directory_domain("directory"); + +gcc_const +static const char * +DeviceToTypeString(unsigned device) +{ + switch (device) { + case DEVICE_INARCHIVE: + return "archive"; + + case DEVICE_CONTAINER: + return "container"; + + default: + return nullptr; + } +} + +gcc_pure +static unsigned +ParseTypeString(const char *type) +{ + if (strcmp(type, "archive") == 0) + return DEVICE_INARCHIVE; + else if (strcmp(type, "container") == 0) + return DEVICE_CONTAINER; + else + return 0; +} + +void +directory_save(BufferedOutputStream &os, const Directory &directory) +{ + if (!directory.IsRoot()) { + const char *type = DeviceToTypeString(directory.device); + if (type != nullptr) + os.Format(DIRECTORY_TYPE "%s\n", type); + + if (directory.mtime != 0) + os.Format(DIRECTORY_MTIME "%lu\n", + (unsigned long)directory.mtime); + + os.Format("%s%s\n", DIRECTORY_BEGIN, directory.GetPath()); + } + + for (const auto &child : directory.children) { + os.Format(DIRECTORY_DIR "%s\n", child.GetName()); + + if (!child.IsMount()) + directory_save(os, child); + + if (!os.Check()) + return; + } + + for (const auto &song : directory.songs) + song_save(os, song); + + playlist_vector_save(os, directory.playlists); + + if (!directory.IsRoot()) + os.Format(DIRECTORY_END "%s\n", directory.GetPath()); +} + +static bool +ParseLine(Directory &directory, const char *line) +{ + if (StringStartsWith(line, DIRECTORY_MTIME)) { + directory.mtime = + ParseUint64(line + sizeof(DIRECTORY_MTIME) - 1); + } else if (StringStartsWith(line, DIRECTORY_TYPE)) { + directory.device = + ParseTypeString(line + sizeof(DIRECTORY_TYPE) - 1); + } else + return false; + + return true; +} + +static Directory * +directory_load_subdir(TextFile &file, Directory &parent, const char *name, + Error &error) +{ + bool success; + + if (parent.FindChild(name) != nullptr) { + error.Format(directory_domain, + "Duplicate subdirectory '%s'", name); + return nullptr; + } + + Directory *directory = parent.CreateChild(name); + + while (true) { + const char *line = file.ReadLine(); + if (line == nullptr) { + error.Set(directory_domain, "Unexpected end of file"); + directory->Delete(); + return nullptr; + } + + if (StringStartsWith(line, DIRECTORY_BEGIN)) + break; + + if (!ParseLine(*directory, line)) { + error.Format(directory_domain, + "Malformed line: %s", line); + directory->Delete(); + return nullptr; + } + } + + success = directory_load(file, *directory, error); + if (!success) { + directory->Delete(); + return nullptr; + } + + return directory; +} + +bool +directory_load(TextFile &file, Directory &directory, Error &error) +{ + const char *line; + + while ((line = file.ReadLine()) != nullptr && + !StringStartsWith(line, DIRECTORY_END)) { + if (StringStartsWith(line, DIRECTORY_DIR)) { + Directory *subdir = + directory_load_subdir(file, directory, + line + sizeof(DIRECTORY_DIR) - 1, + error); + if (subdir == nullptr) + return false; + } else if (StringStartsWith(line, SONG_BEGIN)) { + const char *name = line + sizeof(SONG_BEGIN) - 1; + + if (directory.FindSong(name) != nullptr) { + error.Format(directory_domain, + "Duplicate song '%s'", name); + return false; + } + + DetachedSong *song = song_load(file, name, error); + if (song == nullptr) + return false; + + directory.AddSong(Song::NewFrom(std::move(*song), + directory)); + delete song; + } else if (StringStartsWith(line, PLAYLIST_META_BEGIN)) { + const char *name = line + sizeof(PLAYLIST_META_BEGIN) - 1; + if (!playlist_metadata_load(file, directory.playlists, + name, error)) + return false; + } else { + error.Format(directory_domain, + "Malformed line: %s", line); + return false; + } + } + + return true; +} diff --git a/src/db/plugins/simple/DirectorySave.hxx b/src/db/plugins/simple/DirectorySave.hxx new file mode 100644 index 000000000..f464f9946 --- /dev/null +++ b/src/db/plugins/simple/DirectorySave.hxx @@ -0,0 +1,34 @@ +/* + * 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. + */ + +#ifndef MPD_DIRECTORY_SAVE_HXX +#define MPD_DIRECTORY_SAVE_HXX + +struct Directory; +class TextFile; +class BufferedOutputStream; +class Error; + +void +directory_save(BufferedOutputStream &os, const Directory &directory); + +bool +directory_load(TextFile &file, Directory &directory, Error &error); + +#endif diff --git a/src/db/plugins/simple/Mount.cxx b/src/db/plugins/simple/Mount.cxx new file mode 100644 index 000000000..96c7bbb5c --- /dev/null +++ b/src/db/plugins/simple/Mount.cxx @@ -0,0 +1,96 @@ +/* + * 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 "Mount.hxx" +#include "PrefixedLightSong.hxx" +#include "db/Selection.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Interface.hxx" +#include "fs/Traits.hxx" +#include "util/Error.hxx" + +#include <string> + +struct PrefixedLightDirectory : LightDirectory { + std::string buffer; + + PrefixedLightDirectory(const LightDirectory &directory, + const char *base) + :LightDirectory(directory), + buffer(IsRoot() + ? std::string(base) + : PathTraitsUTF8::Build(base, uri)) { + uri = buffer.c_str(); + } +}; + +static bool +PrefixVisitDirectory(const char *base, const VisitDirectory &visit_directory, + const LightDirectory &directory, Error &error) +{ + return visit_directory(PrefixedLightDirectory(directory, base), error); +} + +static bool +PrefixVisitSong(const char *base, const VisitSong &visit_song, + const LightSong &song, Error &error) +{ + return visit_song(PrefixedLightSong(song, base), error); +} + +static bool +PrefixVisitPlaylist(const char *base, const VisitPlaylist &visit_playlist, + const PlaylistInfo &playlist, + const LightDirectory &directory, + Error &error) +{ + return visit_playlist(playlist, + PrefixedLightDirectory(directory, base), + error); +} + +bool +WalkMount(const char *base, const Database &db, + bool recursive, const SongFilter *filter, + const VisitDirectory &visit_directory, const VisitSong &visit_song, + const VisitPlaylist &visit_playlist, + Error &error) +{ + using namespace std::placeholders; + + VisitDirectory vd; + if (visit_directory) + vd = std::bind(PrefixVisitDirectory, + base, std::ref(visit_directory), _1, _2); + + VisitSong vs; + if (visit_song) + vs = std::bind(PrefixVisitSong, + base, std::ref(visit_song), _1, _2); + + VisitPlaylist vp; + if (visit_playlist) + vp = std::bind(PrefixVisitPlaylist, + base, std::ref(visit_playlist), _1, _2, _3); + + return db.Visit(DatabaseSelection("", recursive, filter), + vd, vs, vp, error); +} diff --git a/src/db/plugins/simple/Mount.hxx b/src/db/plugins/simple/Mount.hxx new file mode 100644 index 000000000..a4690114c --- /dev/null +++ b/src/db/plugins/simple/Mount.hxx @@ -0,0 +1,36 @@ +/* + * 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. + */ + +#ifndef MPD_DB_SIMPLE_MOUNT_HXX +#define MPD_DB_SIMPLE_MOUNT_HXX + +#include "db/Visitor.hxx" + +class Database; +class SongFilter; +class Error; + +bool +WalkMount(const char *base, const Database &db, + bool recursive, const SongFilter *filter, + const VisitDirectory &visit_directory, const VisitSong &visit_song, + const VisitPlaylist &visit_playlist, + Error &error); + +#endif diff --git a/src/db/plugins/simple/PrefixedLightSong.hxx b/src/db/plugins/simple/PrefixedLightSong.hxx new file mode 100644 index 000000000..3664de001 --- /dev/null +++ b/src/db/plugins/simple/PrefixedLightSong.hxx @@ -0,0 +1,41 @@ +/* + * 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. + */ + +#ifndef MPD_DB_SIMPLE_PREFIXED_LIGHT_SONG_HXX +#define MPD_DB_SIMPLE_PREFIXED_LIGHT_SONG_HXX + +#include "check.h" +#include "db/LightSong.hxx" +#include "fs/Traits.hxx" + +#include <string> + +class PrefixedLightSong : public LightSong { + std::string buffer; + +public: + PrefixedLightSong(const LightSong &song, const char *base) + :LightSong(song), + buffer(PathTraitsUTF8::Build(base, GetURI().c_str())) { + uri = buffer.c_str(); + directory = nullptr; + } +}; + +#endif diff --git a/src/db/plugins/simple/SimpleDatabasePlugin.cxx b/src/db/plugins/simple/SimpleDatabasePlugin.cxx new file mode 100644 index 000000000..9fd88ab83 --- /dev/null +++ b/src/db/plugins/simple/SimpleDatabasePlugin.cxx @@ -0,0 +1,538 @@ +/* + * 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 "SimpleDatabasePlugin.hxx" +#include "PrefixedLightSong.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/Selection.hxx" +#include "db/Helpers.hxx" +#include "db/UniqueTags.hxx" +#include "db/LightDirectory.hxx" +#include "Directory.hxx" +#include "Song.hxx" +#include "SongFilter.hxx" +#include "DatabaseSave.hxx" +#include "db/DatabaseLock.hxx" +#include "db/DatabaseError.hxx" +#include "fs/io/TextFile.hxx" +#include "fs/io/BufferedOutputStream.hxx" +#include "fs/io/FileOutputStream.hxx" +#include "fs/io/GzipOutputStream.hxx" +#include "config/ConfigData.hxx" +#include "fs/FileSystem.hxx" +#include "util/CharUtil.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +#include <errno.h> + +static constexpr Domain simple_db_domain("simple_db"); + +inline SimpleDatabase::SimpleDatabase() + :Database(simple_db_plugin), + path(AllocatedPath::Null()), +#ifdef HAVE_ZLIB + compress(true), +#endif + cache_path(AllocatedPath::Null()), + prefixed_light_song(nullptr) {} + +inline SimpleDatabase::SimpleDatabase(AllocatedPath &&_path, +#ifndef HAVE_ZLIB + gcc_unused +#endif + bool _compress) + :Database(simple_db_plugin), + path(std::move(_path)), + path_utf8(path.ToUTF8()), +#ifdef HAVE_ZLIB + compress(_compress), +#endif + cache_path(AllocatedPath::Null()), + prefixed_light_song(nullptr) { +} + +Database * +SimpleDatabase::Create(gcc_unused EventLoop &loop, + gcc_unused DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + SimpleDatabase *db = new SimpleDatabase(); + if (!db->Configure(param, error)) { + delete db; + db = nullptr; + } + + return db; +} + +bool +SimpleDatabase::Configure(const config_param ¶m, Error &error) +{ + path = param.GetBlockPath("path", error); + if (path.IsNull()) { + if (!error.IsDefined()) + error.Set(simple_db_domain, + "No \"path\" parameter specified"); + return false; + } + + path_utf8 = path.ToUTF8(); + + cache_path = param.GetBlockPath("cache_directory", error); + if (path.IsNull() && error.IsDefined()) + return false; + +#ifdef HAVE_ZLIB + compress = param.GetBlockValue("compress", compress); +#endif + + return true; +} + +bool +SimpleDatabase::Check(Error &error) const +{ + assert(!path.IsNull()); + + /* Check if the file exists */ + if (!CheckAccess(path)) { + /* If the file doesn't exist, we can't check if we can write + * it, so we are going to try to get the directory path, and + * see if we can write a file in that */ + const auto dirPath = path.GetDirectoryName(); + + /* Check that the parent part of the path is a directory */ + struct stat st; + if (!StatFile(dirPath, st)) { + error.FormatErrno("Couldn't stat parent directory of db file " + "\"%s\"", + path_utf8.c_str()); + return false; + } + + if (!S_ISDIR(st.st_mode)) { + error.Format(simple_db_domain, + "Couldn't create db file \"%s\" because the " + "parent path is not a directory", + path_utf8.c_str()); + return false; + } + +#ifndef WIN32 + /* Check if we can write to the directory */ + if (!CheckAccess(dirPath, X_OK | W_OK)) { + const int e = errno; + const std::string dirPath_utf8 = dirPath.ToUTF8(); + error.FormatErrno(e, "Can't create db file in \"%s\"", + dirPath_utf8.c_str()); + return false; + } +#endif + return true; + } + + /* Path exists, now check if it's a regular file */ + struct stat st; + if (!StatFile(path, st)) { + error.FormatErrno("Couldn't stat db file \"%s\"", + path_utf8.c_str()); + return false; + } + + if (!S_ISREG(st.st_mode)) { + error.Format(simple_db_domain, + "db file \"%s\" is not a regular file", + path_utf8.c_str()); + return false; + } + +#ifndef WIN32 + /* And check that we can write to it */ + if (!CheckAccess(path, R_OK | W_OK)) { + error.FormatErrno("Can't open db file \"%s\" for reading/writing", + path_utf8.c_str()); + return false; + } +#endif + + return true; +} + +bool +SimpleDatabase::Load(Error &error) +{ + assert(!path.IsNull()); + assert(root != nullptr); + + TextFile file(path, error); + if (file.HasFailed()) + return false; + + if (!db_load_internal(file, *root, error) || !file.Check(error)) + return false; + + struct stat st; + if (StatFile(path, st)) + mtime = st.st_mtime; + + return true; +} + +bool +SimpleDatabase::Open(Error &error) +{ + assert(prefixed_light_song == nullptr); + + root = Directory::NewRoot(); + mtime = 0; + +#ifndef NDEBUG + borrowed_song_count = 0; +#endif + + if (!Load(error)) { + delete root; + + LogError(error); + error.Clear(); + + if (!Check(error)) + return false; + + root = Directory::NewRoot(); + } + + return true; +} + +void +SimpleDatabase::Close() +{ + assert(root != nullptr); + assert(prefixed_light_song == nullptr); + assert(borrowed_song_count == 0); + + delete root; +} + +const LightSong * +SimpleDatabase::GetSong(const char *uri, Error &error) const +{ + assert(root != nullptr); + assert(prefixed_light_song == nullptr); + assert(borrowed_song_count == 0); + + db_lock(); + + auto r = root->LookupDirectory(uri); + + if (r.directory->IsMount()) { + /* pass the request to the mounted database */ + db_unlock(); + + const LightSong *song = + r.directory->mounted_database->GetSong(r.uri, error); + if (song == nullptr) + return nullptr; + + prefixed_light_song = + new PrefixedLightSong(*song, r.directory->GetPath()); + return prefixed_light_song; + } + + if (r.uri == nullptr) { + /* it's a directory */ + db_unlock(); + error.Format(db_domain, DB_NOT_FOUND, + "No such song: %s", uri); + return nullptr; + } + + if (strchr(r.uri, '/') != nullptr) { + /* refers to a URI "below" the actual song */ + db_unlock(); + error.Format(db_domain, DB_NOT_FOUND, + "No such song: %s", uri); + return nullptr; + } + + const Song *song = r.directory->FindSong(r.uri); + db_unlock(); + if (song == nullptr) { + error.Format(db_domain, DB_NOT_FOUND, + "No such song: %s", uri); + return nullptr; + } + + light_song = song->Export(); + +#ifndef NDEBUG + ++borrowed_song_count; +#endif + + return &light_song; +} + +void +SimpleDatabase::ReturnSong(gcc_unused const LightSong *song) const +{ + assert(song != nullptr); + assert(song == &light_song || song == prefixed_light_song); + + delete prefixed_light_song; + prefixed_light_song = nullptr; + +#ifndef NDEBUG + if (song == &light_song) { + assert(borrowed_song_count > 0); + --borrowed_song_count; + } +#endif +} + +bool +SimpleDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + ScopeDatabaseLock protect; + + auto r = root->LookupDirectory(selection.uri.c_str()); + if (r.uri == nullptr) { + /* it's a directory */ + + if (selection.recursive && visit_directory && + !visit_directory(r.directory->Export(), error)) + return false; + + return r.directory->Walk(selection.recursive, selection.filter, + visit_directory, visit_song, + visit_playlist, + error); + } + + if (strchr(r.uri, '/') == nullptr) { + if (visit_song) { + Song *song = r.directory->FindSong(r.uri); + if (song != nullptr) { + const LightSong song2 = song->Export(); + return !selection.Match(song2) || + visit_song(song2, error); + } + } + } + + error.Set(db_domain, DB_NOT_FOUND, "No such directory"); + return false; +} + +bool +SimpleDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + return ::VisitUniqueTags(*this, selection, tag_type, group_mask, + visit_tag, + error); +} + +bool +SimpleDatabase::GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) const +{ + return ::GetStats(*this, selection, stats, error); +} + +bool +SimpleDatabase::Save(Error &error) +{ + db_lock(); + + LogDebug(simple_db_domain, "removing empty directories from DB"); + root->PruneEmpty(); + + LogDebug(simple_db_domain, "sorting DB"); + root->Sort(); + + db_unlock(); + + LogDebug(simple_db_domain, "writing DB"); + + FileOutputStream fos(path, error); + if (!fos.IsDefined()) + return false; + + OutputStream *os = &fos; + +#ifdef HAVE_ZLIB + GzipOutputStream *gzip = nullptr; + if (compress) { + gzip = new GzipOutputStream(*os, error); + if (!gzip->IsDefined()) { + delete gzip; + return false; + } + + os = gzip; + } +#endif + + BufferedOutputStream bos(*os); + + db_save_internal(bos, *root); + + if (!bos.Flush(error)) { +#ifdef HAVE_ZLIB + delete gzip; +#endif + return false; + } + +#ifdef HAVE_ZLIB + if (gzip != nullptr) { + bool success = gzip->Flush(error); + delete gzip; + if (!success) + return false; + } +#endif + + if (!fos.Commit(error)) + return false; + + struct stat st; + if (StatFile(path, st)) + mtime = st.st_mtime; + + return true; +} + +bool +SimpleDatabase::Mount(const char *uri, Database *db, Error &error) +{ + assert(uri != nullptr); + assert(*uri != 0); + assert(db != nullptr); + + ScopeDatabaseLock protect; + + auto r = root->LookupDirectory(uri); + if (r.uri == nullptr) { + error.Format(db_domain, DB_CONFLICT, + "Already exists: %s", uri); + return nullptr; + } + + if (strchr(r.uri, '/') != nullptr) { + error.Format(db_domain, DB_NOT_FOUND, + "Parent not found: %s", uri); + return nullptr; + } + + Directory *mnt = r.directory->CreateChild(r.uri); + mnt->mounted_database = db; + return true; +} + +static constexpr bool +IsSafeChar(char ch) +{ + return IsAlphaNumericASCII(ch) || ch == '-' || ch == '_' || ch == '%'; +} + +static constexpr bool +IsUnsafeChar(char ch) +{ + return !IsSafeChar(ch); +} + +bool +SimpleDatabase::Mount(const char *local_uri, const char *storage_uri, + Error &error) +{ + if (cache_path.IsNull()) { + error.Format(db_domain, DB_NOT_FOUND, + "No 'cache_directory' configured"); + return nullptr; + } + + std::string name(storage_uri); + std::replace_if(name.begin(), name.end(), IsUnsafeChar, '_'); + +#ifndef HAVE_ZLIB + constexpr bool compress = false; +#endif + auto db = new SimpleDatabase(AllocatedPath::Build(cache_path, + name.c_str()), + compress); + if (!db->Open(error)) { + delete db; + return false; + } + + // TODO: update the new database instance? + + if (!Mount(local_uri, db, error)) { + db->Close(); + delete db; + return false; + } + + return true; +} + +Database * +SimpleDatabase::LockUmountSteal(const char *uri) +{ + ScopeDatabaseLock protect; + + auto r = root->LookupDirectory(uri); + if (r.uri != nullptr || !r.directory->IsMount()) + return nullptr; + + Database *db = r.directory->mounted_database; + r.directory->mounted_database = nullptr; + r.directory->Delete(); + + return db; +} + +bool +SimpleDatabase::Unmount(const char *uri) +{ + Database *db = LockUmountSteal(uri); + if (db == nullptr) + return false; + + db->Close(); + delete db; + return true; +} + +const DatabasePlugin simple_db_plugin = { + "simple", + DatabasePlugin::FLAG_REQUIRE_STORAGE, + SimpleDatabase::Create, +}; diff --git a/src/db/plugins/simple/SimpleDatabasePlugin.hxx b/src/db/plugins/simple/SimpleDatabasePlugin.hxx new file mode 100644 index 000000000..7ba71e272 --- /dev/null +++ b/src/db/plugins/simple/SimpleDatabasePlugin.hxx @@ -0,0 +1,149 @@ +/* + * 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. + */ + +#ifndef MPD_SIMPLE_DATABASE_PLUGIN_HXX +#define MPD_SIMPLE_DATABASE_PLUGIN_HXX + +#include "check.h" +#include "db/Interface.hxx" +#include "fs/AllocatedPath.hxx" +#include "db/LightSong.hxx" +#include "Compiler.h" + +#include <cassert> + +struct config_param; +struct Directory; +struct DatabasePlugin; +class EventLoop; +class DatabaseListener; +class PrefixedLightSong; + +class SimpleDatabase : public Database { + AllocatedPath path; + std::string path_utf8; + +#ifdef HAVE_ZLIB + bool compress; +#endif + + /** + * The path where cache files for Mount() are located. + */ + AllocatedPath cache_path; + + Directory *root; + + time_t mtime; + + /** + * A buffer for GetSong() when prefixing the #LightSong + * instance from a mounted #Database. + */ + mutable PrefixedLightSong *prefixed_light_song; + + /** + * A buffer for GetSong(). + */ + mutable LightSong light_song; + +#ifndef NDEBUG + mutable unsigned borrowed_song_count; +#endif + + SimpleDatabase(); + + SimpleDatabase(AllocatedPath &&_path, bool _compress); + +public: + static Database *Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); + + gcc_pure + Directory &GetRoot() { + assert(root != NULL); + + return *root; + } + + bool Save(Error &error); + + /** + * Returns true if there is a valid database file on the disk. + */ + bool FileExists() const { + return mtime > 0; + } + + /** + * @param db the #Database to be mounted; must be "open"; on + * success, this object gains ownership of the given #Database + */ + gcc_nonnull_all + bool Mount(const char *uri, Database *db, Error &error); + + gcc_nonnull_all + bool Mount(const char *local_uri, const char *storage_uri, + Error &error); + + gcc_nonnull_all + bool Unmount(const char *uri); + + /* virtual methods from class Database */ + virtual bool Open(Error &error) override; + virtual void Close() override; + + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; + + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const override; + + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + + virtual time_t GetUpdateStamp() const override { + return mtime; + } + +private: + bool Configure(const config_param ¶m, Error &error); + + gcc_pure + bool Check(Error &error) const; + + bool Load(Error &error); + + Database *LockUmountSteal(const char *uri); +}; + +extern const DatabasePlugin simple_db_plugin; + +#endif diff --git a/src/db/plugins/simple/Song.cxx b/src/db/plugins/simple/Song.cxx new file mode 100644 index 000000000..3bd3d8316 --- /dev/null +++ b/src/db/plugins/simple/Song.cxx @@ -0,0 +1,111 @@ +/* + * 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 "Song.hxx" +#include "Directory.hxx" +#include "tag/Tag.hxx" +#include "util/VarSize.hxx" +#include "DetachedSong.hxx" +#include "db/LightSong.hxx" + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +inline Song::Song(const char *_uri, size_t uri_length, Directory &_parent) + :parent(&_parent), mtime(0), start_ms(0), end_ms(0) +{ + memcpy(uri, _uri, uri_length + 1); +} + +inline Song::~Song() +{ +} + +static Song * +song_alloc(const char *uri, Directory &parent) +{ + size_t uri_length; + + assert(uri); + uri_length = strlen(uri); + assert(uri_length); + + return NewVarSize<Song>(sizeof(Song::uri), + uri_length + 1, + uri, uri_length, parent); +} + +Song * +Song::NewFrom(DetachedSong &&other, Directory &parent) +{ + Song *song = song_alloc(other.GetURI(), parent); + song->tag = std::move(other.WritableTag()); + song->mtime = other.GetLastModified(); + song->start_ms = other.GetStartMS(); + song->end_ms = other.GetEndMS(); + return song; +} + +Song * +Song::NewFile(const char *path, Directory &parent) +{ + return song_alloc(path, parent); +} + +void +Song::Free() +{ + DeleteVarSize(this); +} + +std::string +Song::GetURI() const +{ + assert(*uri); + + if (parent->IsRoot()) + return std::string(uri); + else { + const char *path = parent->GetPath(); + + std::string result; + result.reserve(strlen(path) + 1 + strlen(uri)); + result.assign(path); + result.push_back('/'); + result.append(uri); + return result; + } +} + +LightSong +Song::Export() const +{ + LightSong dest; + dest.directory = parent->IsRoot() + ? nullptr : parent->GetPath(); + dest.uri = uri; + dest.real_uri = nullptr; + dest.tag = &tag; + dest.mtime = mtime; + dest.start_ms = start_ms; + dest.end_ms = end_ms; + return dest; +} diff --git a/src/db/plugins/simple/Song.hxx b/src/db/plugins/simple/Song.hxx new file mode 100644 index 000000000..b2e85aa6b --- /dev/null +++ b/src/db/plugins/simple/Song.hxx @@ -0,0 +1,129 @@ +/* + * 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. + */ + +#ifndef MPD_SONG_HXX +#define MPD_SONG_HXX + +#include "tag/Tag.hxx" +#include "Compiler.h" + +#include <boost/intrusive/list.hpp> + +#include <string> + +#include <assert.h> +#include <time.h> + +struct LightSong; +struct Directory; +class DetachedSong; +class Storage; + +/** + * A song file inside the configured music directory. Internal + * #SimpleDatabase class. + */ +struct Song { + static constexpr auto link_mode = boost::intrusive::normal_link; + typedef boost::intrusive::link_mode<link_mode> LinkMode; + typedef boost::intrusive::list_member_hook<LinkMode> Hook; + + struct Disposer { + void operator()(Song *song) const { + song->Free(); + } + }; + + /** + * Pointers to the siblings of this directory within the + * parent directory. It is unused (undefined) if this song is + * not in the database. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + Hook siblings; + + Tag tag; + + /** + * The #Directory that contains this song. Must be + * non-nullptr. directory this way. + */ + Directory *const parent; + + time_t mtime; + + /** + * Start of this sub-song within the file in milliseconds. + */ + unsigned start_ms; + + /** + * End of this sub-song within the file in milliseconds. + * Unused if zero. + */ + unsigned end_ms; + + /** + * The file name. + */ + char uri[sizeof(int)]; + + Song(const char *_uri, size_t uri_length, Directory &parent); + ~Song(); + + gcc_malloc + static Song *NewFrom(DetachedSong &&other, Directory &parent); + + /** allocate a new song with a local file name */ + gcc_malloc + static Song *NewFile(const char *path_utf8, Directory &parent); + + /** + * allocate a new song structure with a local file name and attempt to + * load its metadata. If all decoder plugin fail to read its meta + * data, nullptr is returned. + */ + gcc_malloc + static Song *LoadFile(Storage &storage, const char *name_utf8, + Directory &parent); + + void Free(); + + bool UpdateFile(Storage &storage); + bool UpdateFileInArchive(const Storage &storage); + + /** + * Returns the URI of the song in UTF-8 encoding, including its + * location within the music directory. + */ + gcc_pure + std::string GetURI() const; + + gcc_pure + LightSong Export() const; +}; + +typedef boost::intrusive::list<Song, + boost::intrusive::member_hook<Song, Song::Hook, + &Song::siblings>, + boost::intrusive::constant_time_size<false>> SongList; + +#endif diff --git a/src/db/plugins/simple/SongSort.cxx b/src/db/plugins/simple/SongSort.cxx new file mode 100644 index 000000000..4b7144937 --- /dev/null +++ b/src/db/plugins/simple/SongSort.cxx @@ -0,0 +1,108 @@ +/* + * 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 "SongSort.hxx" +#include "Song.hxx" +#include "tag/Tag.hxx" +#include "lib/icu/Collate.hxx" + +#include <stdlib.h> + +static int +compare_utf8_string(const char *a, const char *b) +{ + if (a == nullptr) + return b == nullptr ? 0 : -1; + + if (b == nullptr) + return 1; + + return IcuCollate(a, b); +} + +/** + * Compare two string tag values, ignoring case. Either one may be + * nullptr. + */ +static int +compare_string_tag_item(const Tag &a, const Tag &b, + TagType type) +{ + return compare_utf8_string(a.GetValue(type), + b.GetValue(type)); +} + +/** + * Compare two tag values which should contain an integer value + * (e.g. disc or track number). Either one may be nullptr. + */ +static int +compare_number_string(const char *a, const char *b) +{ + long ai = a == nullptr ? 0 : strtol(a, nullptr, 10); + long bi = b == nullptr ? 0 : strtol(b, nullptr, 10); + + if (ai <= 0) + return bi <= 0 ? 0 : -1; + + if (bi <= 0) + return 1; + + return ai - bi; +} + +static int +compare_tag_item(const Tag &a, const Tag &b, TagType type) +{ + return compare_number_string(a.GetValue(type), + b.GetValue(type)); +} + +/* Only used for sorting/searchin a songvec, not general purpose compares */ +gcc_pure +static bool +song_cmp(const Song &a, const Song &b) +{ + int ret; + + /* first sort by album */ + ret = compare_string_tag_item(a.tag, b.tag, TAG_ALBUM); + if (ret != 0) + return ret < 0; + + /* then sort by disc */ + ret = compare_tag_item(a.tag, b.tag, TAG_DISC); + if (ret != 0) + return ret < 0; + + /* then by track number */ + ret = compare_tag_item(a.tag, b.tag, TAG_TRACK); + if (ret != 0) + return ret < 0; + + /* still no difference? compare file name */ + return IcuCollate(a.uri, b.uri) < 0; +} + +void +song_list_sort(SongList &songs) +{ + songs.sort(song_cmp); +} diff --git a/src/db/plugins/simple/SongSort.hxx b/src/db/plugins/simple/SongSort.hxx new file mode 100644 index 000000000..2a0c4383b --- /dev/null +++ b/src/db/plugins/simple/SongSort.hxx @@ -0,0 +1,30 @@ +/* + * 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. + */ + +#ifndef MPD_SONG_SORT_HXX +#define MPD_SONG_SORT_HXX + +#include "Song.hxx" + +struct list_head; + +void +song_list_sort(SongList &songs); + +#endif diff --git a/src/db/plugins/upnp/ContentDirectoryService.cxx b/src/db/plugins/upnp/ContentDirectoryService.cxx new file mode 100644 index 000000000..c097f7644 --- /dev/null +++ b/src/db/plugins/upnp/ContentDirectoryService.cxx @@ -0,0 +1,204 @@ +/* + * 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 "lib/upnp/ContentDirectoryService.hxx" +#include "lib/upnp/Domain.hxx" +#include "lib/upnp/ixmlwrap.hxx" +#include "lib/upnp/Action.hxx" +#include "Directory.hxx" +#include "util/NumberParser.hxx" +#include "util/Error.hxx" + +#include <stdio.h> + +static bool +ReadResultTag(UPnPDirContent &dirbuf, IXML_Document *response, Error &error) +{ + const char *p = ixmlwrap::getFirstElementValue(response, "Result"); + if (p == nullptr) + p = ""; + + return dirbuf.parse(p, error); +} + +inline bool +ContentDirectoryService::readDirSlice(UpnpClient_Handle hdl, + const char *objectId, unsigned offset, + unsigned count, UPnPDirContent &dirbuf, + unsigned &didreadp, unsigned &totalp, + Error &error) const +{ + // Create request + char ofbuf[100], cntbuf[100]; + sprintf(ofbuf, "%u", offset); + sprintf(cntbuf, "%u", count); + // Some devices require an empty SortCriteria, else bad params + IXML_Document *request = + MakeActionHelper("Browse", m_serviceType.c_str(), + "ObjectID", objectId, + "BrowseFlag", "BrowseDirectChildren", + "Filter", "*", + "SortCriteria", "", + "StartingIndex", ofbuf, + "RequestedCount", cntbuf); + if (request == nullptr) { + error.Set(upnp_domain, "UpnpMakeAction() failed"); + return false; + } + + IXML_Document *response; + int code = UpnpSendAction(hdl, m_actionURL.c_str(), m_serviceType.c_str(), + 0 /*devUDN*/, request, &response); + ixmlDocument_free(request); + if (code != UPNP_E_SUCCESS) { + error.Format(upnp_domain, code, + "UpnpSendAction() failed: %s", + UpnpGetErrorMessage(code)); + return false; + } + + const char *value = ixmlwrap::getFirstElementValue(response, "NumberReturned"); + didreadp = value != nullptr + ? ParseUnsigned(value) + : 0; + + value = ixmlwrap::getFirstElementValue(response, "TotalMatches"); + if (value != nullptr) + totalp = ParseUnsigned(value); + + bool success = ReadResultTag(dirbuf, response, error); + ixmlDocument_free(response); + return success; +} + +bool +ContentDirectoryService::readDir(UpnpClient_Handle handle, + const char *objectId, + UPnPDirContent &dirbuf, + Error &error) const +{ + unsigned offset = 0, total = -1, count; + + do { + if (!readDirSlice(handle, objectId, offset, m_rdreqcnt, dirbuf, + count, total, error)) + return false; + + offset += count; + } while (count > 0 && offset < total); + + return true; +} + +bool +ContentDirectoryService::search(UpnpClient_Handle hdl, + const char *objectId, + const char *ss, + UPnPDirContent &dirbuf, + Error &error) const +{ + unsigned offset = 0, total = -1, count; + + do { + char ofbuf[100]; + sprintf(ofbuf, "%d", offset); + + IXML_Document *request = + MakeActionHelper("Search", m_serviceType.c_str(), + "ContainerID", objectId, + "SearchCriteria", ss, + "Filter", "*", + "SortCriteria", "", + "StartingIndex", ofbuf, + "RequestedCount", "0"); // Setting a value here gets twonky into fits + if (request == 0) { + error.Set(upnp_domain, "UpnpMakeAction() failed"); + return false; + } + + IXML_Document *response; + auto code = UpnpSendAction(hdl, m_actionURL.c_str(), + m_serviceType.c_str(), + 0 /*devUDN*/, request, &response); + ixmlDocument_free(request); + if (code != UPNP_E_SUCCESS) { + error.Format(upnp_domain, code, + "UpnpSendAction() failed: %s", + UpnpGetErrorMessage(code)); + return false; + } + + const char *value = + ixmlwrap::getFirstElementValue(response, "NumberReturned"); + count = value != nullptr + ? ParseUnsigned(value) + : 0; + + offset += count; + + value = ixmlwrap::getFirstElementValue(response, "TotalMatches"); + if (value != nullptr) + total = ParseUnsigned(value); + + bool success = ReadResultTag(dirbuf, response, error); + ixmlDocument_free(response); + if (!success) + return false; + } while (count > 0 && offset < total); + + return true; +} + +bool +ContentDirectoryService::getMetadata(UpnpClient_Handle hdl, + const char *objectId, + UPnPDirContent &dirbuf, + Error &error) const +{ + // Create request + IXML_Document *request = + MakeActionHelper("Browse", m_serviceType.c_str(), + "ObjectID", objectId, + "BrowseFlag", "BrowseMetadata", + "Filter", "*", + "SortCriteria", "", + "StartingIndex", "0", + "RequestedCount", "1"); + if (request == nullptr) { + error.Set(upnp_domain, "UpnpMakeAction() failed"); + return false; + } + + IXML_Document *response; + auto code = UpnpSendAction(hdl, m_actionURL.c_str(), + m_serviceType.c_str(), + 0 /*devUDN*/, request, &response); + ixmlDocument_free(request); + if (code != UPNP_E_SUCCESS) { + error.Format(upnp_domain, code, + "UpnpSendAction() failed: %s", + UpnpGetErrorMessage(code)); + return false; + } + + bool success = ReadResultTag(dirbuf, response, error); + ixmlDocument_free(response); + return success; +} diff --git a/src/db/plugins/upnp/Directory.cxx b/src/db/plugins/upnp/Directory.cxx new file mode 100644 index 000000000..e43cd48a6 --- /dev/null +++ b/src/db/plugins/upnp/Directory.cxx @@ -0,0 +1,262 @@ +/* + * 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 "Directory.hxx" +#include "lib/upnp/Util.hxx" +#include "lib/expat/ExpatParser.hxx" +#include "Tags.hxx" +#include "tag/TagBuilder.hxx" +#include "tag/TagTable.hxx" +#include "util/NumberParser.hxx" + +#include <algorithm> +#include <string> + +#include <string.h> + +UPnPDirContent::~UPnPDirContent() +{ + /* this destructor exists here just so it won't get inlined */ +} + +gcc_pure gcc_nonnull_all +static bool +CompareStringLiteral(const char *literal, const char *value, size_t length) +{ + return length == strlen(literal) && + memcmp(literal, value, length) == 0; +} + +gcc_pure +static UPnPDirObject::ItemClass +ParseItemClass(const char *name, size_t length) +{ + if (CompareStringLiteral("object.item.audioItem.musicTrack", + name, length)) + return UPnPDirObject::ItemClass::MUSIC; + else if (CompareStringLiteral("object.item.playlistItem", + name, length)) + return UPnPDirObject::ItemClass::PLAYLIST; + else + return UPnPDirObject::ItemClass::UNKNOWN; +} + +gcc_pure +static int +ParseDuration(const char *duration) +{ + char *endptr; + + unsigned result = ParseUnsigned(duration, &endptr); + if (endptr == duration || *endptr != ':') + return 0; + + result *= 60; + duration = endptr + 1; + result += ParseUnsigned(duration, &endptr); + if (endptr == duration || *endptr != ':') + return 0; + + result *= 60; + duration = endptr + 1; + result += ParseUnsigned(duration, &endptr); + if (endptr == duration || *endptr != 0) + return 0; + + return result; +} + +/** + * Transform titles to turn '/' into '_' to make them acceptable path + * elements. There is a very slight risk of collision in doing + * this. Twonky returns directory names (titles) like 'Artist/Album'. + */ +gcc_pure +static std::string +titleToPathElt(std::string &&s) +{ + std::replace(s.begin(), s.end(), '/', '_'); + return s; +} + +/** + * An XML parser which builds directory contents from DIDL lite input. + */ +class UPnPDirParser final : public CommonExpatParser { + UPnPDirContent &m_dir; + + enum { + NONE, + RES, + CLASS, + } state; + + /** + * If not equal to #TAG_NUM_OF_ITEM_TYPES, then we're + * currently reading an element containing a tag value. The + * value is being constructed in #value. + */ + TagType tag_type; + + /** + * The text inside the current element. + */ + std::string value; + + UPnPDirObject m_tobj; + TagBuilder tag; + +public: + UPnPDirParser(UPnPDirContent& dir) + :m_dir(dir), + state(NONE), + tag_type(TAG_NUM_OF_ITEM_TYPES) + { + } + +protected: + virtual void StartElement(const XML_Char *name, const XML_Char **attrs) + { + if (m_tobj.type != UPnPDirObject::Type::UNKNOWN && + tag_type == TAG_NUM_OF_ITEM_TYPES) { + tag_type = tag_table_lookup(upnp_tags, name); + if (tag_type != TAG_NUM_OF_ITEM_TYPES) + return; + } else { + assert(tag_type == TAG_NUM_OF_ITEM_TYPES); + } + + switch (name[0]) { + case 'c': + if (!strcmp(name, "container")) { + m_tobj.clear(); + m_tobj.type = UPnPDirObject::Type::CONTAINER; + + const char *id = GetAttribute(attrs, "id"); + if (id != nullptr) + m_tobj.m_id = id; + + const char *pid = GetAttribute(attrs, "parentID"); + if (pid != nullptr) + m_tobj.m_pid = pid; + } + break; + + case 'i': + if (!strcmp(name, "item")) { + m_tobj.clear(); + m_tobj.type = UPnPDirObject::Type::ITEM; + + const char *id = GetAttribute(attrs, "id"); + if (id != nullptr) + m_tobj.m_id = id; + + const char *pid = GetAttribute(attrs, "parentID"); + if (pid != nullptr) + m_tobj.m_pid = pid; + } + break; + + case 'r': + if (!strcmp(name, "res")) { + // <res protocolInfo="http-get:*:audio/mpeg:*" size="5171496" + // bitrate="24576" duration="00:03:35" sampleFrequency="44100" + // nrAudioChannels="2"> + + const char *duration = + GetAttribute(attrs, "duration"); + if (duration != nullptr) + tag.SetTime(ParseDuration(duration)); + + state = RES; + } + + break; + + case 'u': + if (strcmp(name, "upnp:class") == 0) + state = CLASS; + } + } + + bool checkobjok() { + if (m_tobj.m_id.empty() || m_tobj.m_pid.empty() || + m_tobj.name.empty() || + (m_tobj.type == UPnPDirObject::Type::ITEM && + m_tobj.item_class == UPnPDirObject::ItemClass::UNKNOWN)) + return false; + + return true; + } + + virtual void EndElement(const XML_Char *name) + { + if (tag_type != TAG_NUM_OF_ITEM_TYPES) { + assert(m_tobj.type != UPnPDirObject::Type::UNKNOWN); + + tag.AddItem(tag_type, value.c_str()); + + if (tag_type == TAG_TITLE) + m_tobj.name = titleToPathElt(std::move(value)); + + value.clear(); + tag_type = TAG_NUM_OF_ITEM_TYPES; + return; + } + + if ((!strcmp(name, "container") || !strcmp(name, "item")) && + checkobjok()) { + tag.Commit(m_tobj.tag); + m_dir.objects.emplace_back(std::move(m_tobj)); + } + + state = NONE; + } + + virtual void CharacterData(const XML_Char *s, int len) + { + if (tag_type != TAG_NUM_OF_ITEM_TYPES) { + assert(m_tobj.type != UPnPDirObject::Type::UNKNOWN); + + value.append(s, len); + return; + } + + switch (state) { + case NONE: + break; + + case RES: + m_tobj.url.assign(s, len); + break; + + case CLASS: + m_tobj.item_class = ParseItemClass(s, len); + break; + } + } +}; + +bool +UPnPDirContent::parse(const char *input, Error &error) +{ + UPnPDirParser parser(*this); + return parser.Parse(input, strlen(input), true, error); +} diff --git a/src/db/plugins/upnp/Directory.hxx b/src/db/plugins/upnp/Directory.hxx new file mode 100644 index 000000000..433979900 --- /dev/null +++ b/src/db/plugins/upnp/Directory.hxx @@ -0,0 +1,66 @@ +/* + * 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. + */ + +#ifndef MPD_UPNP_DIRECTORY_HXX +#define MPD_UPNP_DIRECTORY_HXX + +#include "Object.hxx" +#include "Compiler.h" + +#include <string> +#include <vector> + +class Error; + +/** + * Image of a MediaServer Directory Service container (directory), + * possibly containing items and subordinate containers. + */ +class UPnPDirContent { +public: + std::vector<UPnPDirObject> objects; + + ~UPnPDirContent(); + + gcc_pure + UPnPDirObject *FindObject(const char *name) { + for (auto &o : objects) + if (o.name == name) + return &o; + + return nullptr; + } + + /** + * Parse from DIDL-Lite XML data. + * + * Normally only used by ContentDirectoryService::readDir() + * This is cumulative: in general, the XML data is obtained in + * several documents corresponding to (offset,count) slices of the + * directory (container). parse() can be called repeatedly with + * the successive XML documents and will accumulate entries in the item + * and container vectors. This makes more sense if the different + * chunks are from the same container, but given that UPnP Ids are + * actually global, nothing really bad will happen if you mix + * up... + */ + bool parse(const char *didltext, Error &error); +}; + +#endif /* _UPNPDIRCONTENT_H_X_INCLUDED_ */ diff --git a/src/db/plugins/upnp/Object.cxx b/src/db/plugins/upnp/Object.cxx new file mode 100644 index 000000000..703fb0be4 --- /dev/null +++ b/src/db/plugins/upnp/Object.cxx @@ -0,0 +1,25 @@ +/* + * 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 "Object.hxx" + +UPnPDirObject::~UPnPDirObject() +{ + /* this destructor exists here just so it won't get inlined */ +} diff --git a/src/db/plugins/upnp/Object.hxx b/src/db/plugins/upnp/Object.hxx new file mode 100644 index 000000000..16a66c774 --- /dev/null +++ b/src/db/plugins/upnp/Object.hxx @@ -0,0 +1,85 @@ +/* + * 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. + */ + +#ifndef MPD_UPNP_OBJECT_HXX +#define MPD_UPNP_OBJECT_HXX + +#include "tag/Tag.hxx" + +#include <string> + +/** + * UpnP Media Server directory entry, converted from XML data. + * + * This is a dumb data holder class, a struct with helpers. + */ +class UPnPDirObject { +public: + enum class Type { + UNKNOWN, + ITEM, + CONTAINER, + }; + + // There are actually several kinds of containers: + // object.container.storageFolder, object.container.person, + // object.container.playlistContainer etc., but they all seem to + // behave the same as far as we're concerned. Otoh, musicTrack + // items are special to us, and so should playlists, but I've not + // seen one of the latter yet (servers seem to use containers for + // playlists). + enum class ItemClass { + UNKNOWN, + MUSIC, + PLAYLIST, + }; + + std::string m_id; // ObjectId + std::string m_pid; // Parent ObjectId + std::string url; + + /** + * A copy of "dc:title" sanitized as a file name. + */ + std::string name; + + Type type; + ItemClass item_class; + + Tag tag; + + UPnPDirObject() = default; + UPnPDirObject(UPnPDirObject &&) = default; + + ~UPnPDirObject(); + + UPnPDirObject &operator=(UPnPDirObject &&) = default; + + void clear() + { + m_id.clear(); + m_pid.clear(); + url.clear(); + type = Type::UNKNOWN; + item_class = ItemClass::UNKNOWN; + tag.Clear(); + } +}; + +#endif /* _UPNPDIRCONTENT_H_X_INCLUDED_ */ diff --git a/src/db/plugins/upnp/Tags.cxx b/src/db/plugins/upnp/Tags.cxx new file mode 100644 index 000000000..fd65df4d0 --- /dev/null +++ b/src/db/plugins/upnp/Tags.cxx @@ -0,0 +1,33 @@ +/* + * 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 "Tags.hxx" +#include "tag/TagTable.hxx" + +const struct tag_table upnp_tags[] = { + { "upnp:artist", TAG_ARTIST }, + { "upnp:album", TAG_ALBUM }, + { "upnp:originalTrackNumber", TAG_TRACK }, + { "upnp:genre", TAG_GENRE }, + { "dc:title", TAG_TITLE }, + + /* sentinel */ + { nullptr, TAG_NUM_OF_ITEM_TYPES } +}; diff --git a/src/db/plugins/upnp/Tags.hxx b/src/db/plugins/upnp/Tags.hxx new file mode 100644 index 000000000..ec6d18478 --- /dev/null +++ b/src/db/plugins/upnp/Tags.hxx @@ -0,0 +1,28 @@ +/* + * 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. + */ + +#ifndef MPD_UPNP_TAGS_HXX +#define MPD_UPNP_TAGS_HXX + +/** + * Map UPnP property names to MPD tags. + */ +extern const struct tag_table upnp_tags[]; + +#endif diff --git a/src/db/plugins/upnp/UpnpDatabasePlugin.cxx b/src/db/plugins/upnp/UpnpDatabasePlugin.cxx new file mode 100644 index 000000000..66951f402 --- /dev/null +++ b/src/db/plugins/upnp/UpnpDatabasePlugin.cxx @@ -0,0 +1,786 @@ +/* + * 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 "UpnpDatabasePlugin.hxx" +#include "Directory.hxx" +#include "Tags.hxx" +#include "lib/upnp/Domain.hxx" +#include "lib/upnp/ClientInit.hxx" +#include "lib/upnp/Discovery.hxx" +#include "lib/upnp/ContentDirectoryService.hxx" +#include "lib/upnp/Util.hxx" +#include "db/Interface.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/Selection.hxx" +#include "db/DatabaseError.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Stats.hxx" +#include "config/ConfigData.hxx" +#include "tag/TagBuilder.hxx" +#include "tag/TagTable.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "fs/Traits.hxx" +#include "Log.hxx" +#include "SongFilter.hxx" + +#include <string> +#include <vector> +#include <set> + +#include <assert.h> +#include <string.h> + +static const char *const rootid = "0"; + +class UpnpSong : public LightSong { + std::string uri2, real_uri2; + + Tag tag2; + +public: + UpnpSong(UPnPDirObject &&object, std::string &&_uri) + :uri2(std::move(_uri)), + real_uri2(std::move(object.url)), + tag2(std::move(object.tag)) { + directory = nullptr; + uri = uri2.c_str(); + real_uri = real_uri2.c_str(); + tag = &tag2; + mtime = 0; + start_ms = end_ms = 0; + } +}; + +class UpnpDatabase : public Database { + UpnpClient_Handle handle; + UPnPDeviceDirectory *discovery; + +public: + UpnpDatabase():Database(upnp_db_plugin) {} + + static Database *Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); + + virtual bool Open(Error &error) override; + virtual void Close() override; + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; + + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const override; + + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + virtual time_t GetUpdateStamp() const {return 0;} + +protected: + bool Configure(const config_param ¶m, Error &error); + +private: + bool VisitServer(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const; + + /** + * Run an UPnP search according to MPD parameters, and + * visit_song the results. + */ + bool SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + VisitSong visit_song, + Error &error) const; + + bool SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + UPnPDirContent& dirbuf, + Error &error) const; + + bool Namei(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + UPnPDirObject &dirent, + Error &error) const; + + /** + * Take server and objid, return metadata. + */ + bool ReadNode(const ContentDirectoryService &server, + const char *objid, UPnPDirObject& dirent, + Error &error) const; + + /** + * Get the path for an object Id. This works much like pwd, + * except easier cause our inodes have a parent id. Not used + * any more actually (see comments in SearchSongs). + */ + bool BuildPath(const ContentDirectoryService &server, + const UPnPDirObject& dirent, std::string &idpath, + Error &error) const; +}; + +Database * +UpnpDatabase::Create(gcc_unused EventLoop &loop, + gcc_unused DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + UpnpDatabase *db = new UpnpDatabase(); + if (!db->Configure(param, error)) { + delete db; + return nullptr; + } + + /* libupnp loses its ability to receive multicast messages + apparently due to daemonization; using the LazyDatabase + wrapper works around this problem */ + return db; +} + +inline bool +UpnpDatabase::Configure(const config_param &, Error &) +{ + return true; +} + +bool +UpnpDatabase::Open(Error &error) +{ + if (!UpnpClientGlobalInit(handle, error)) + return false; + + discovery = new UPnPDeviceDirectory(handle); + if (!discovery->Start(error)) { + delete discovery; + UpnpClientGlobalFinish(); + return false; + } + + return true; +} + +void +UpnpDatabase::Close() +{ + delete discovery; + UpnpClientGlobalFinish(); +} + +void +UpnpDatabase::ReturnSong(const LightSong *_song) const +{ + assert(_song != nullptr); + + UpnpSong *song = (UpnpSong *)const_cast<LightSong *>(_song); + delete song; +} + +// Get song info by path. We can receive either the id path, or the titles +// one +const LightSong * +UpnpDatabase::GetSong(const char *uri, Error &error) const +{ + auto vpath = stringToTokens(uri, "/", true); + if (vpath.size() < 2) { + error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri); + return nullptr; + } + + ContentDirectoryService server; + if (!discovery->getServer(vpath.front().c_str(), server, error)) + return nullptr; + + vpath.pop_front(); + + UPnPDirObject dirent; + if (vpath.front() != rootid) { + if (!Namei(server, vpath, dirent, error)) + return nullptr; + } else { + if (!ReadNode(server, vpath.back().c_str(), dirent, + error)) + return nullptr; + } + + return new UpnpSong(std::move(dirent), uri); +} + +/** + * Double-quote a string, adding internal backslash escaping. + */ +static void +dquote(std::string &out, const char *in) +{ + out.push_back('"'); + + for (; *in != 0; ++in) { + switch(*in) { + case '\\': + case '"': + out.push_back('\\'); + break; + } + + out.push_back(*in); + } + + out.push_back('"'); +} + +// Run an UPnP search, according to MPD parameters. Return results as +// UPnP items +bool +UpnpDatabase::SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + UPnPDirContent &dirbuf, + Error &error) const +{ + const SongFilter *filter = selection.filter; + if (selection.filter == nullptr) + return true; + + std::list<std::string> searchcaps; + if (!server.getSearchCapabilities(handle, searchcaps, error)) + return false; + + if (searchcaps.empty()) + return true; + + std::string cond; + for (const auto &item : filter->GetItems()) { + switch (auto tag = item.GetTag()) { + case LOCATE_TAG_ANY_TYPE: + { + if (!cond.empty()) { + cond += " and "; + } + cond += '('; + bool first(true); + for (const auto& cap : searchcaps) { + if (first) + first = false; + else + cond += " or "; + cond += cap; + if (item.GetFoldCase()) { + cond += " contains "; + } else { + cond += " = "; + } + dquote(cond, item.GetValue().c_str()); + } + cond += ')'; + } + break; + + default: + /* Unhandled conditions like + LOCATE_TAG_BASE_TYPE or + LOCATE_TAG_FILE_TYPE won't have a + corresponding upnp prop, so they will be + skipped */ + if (tag == TAG_ALBUM_ARTIST) + tag = TAG_ARTIST; + + // TODO: support LOCATE_TAG_ANY_TYPE etc. + const char *name = tag_table_lookup(upnp_tags, + TagType(tag)); + if (name == nullptr) + continue; + + if (!cond.empty()) { + cond += " and "; + } + cond += name; + + /* FoldCase doubles up as contains/equal + switch. UpNP search is supposed to be + case-insensitive, but at least some servers + have the same convention as mpd (e.g.: + minidlna) */ + if (item.GetFoldCase()) { + cond += " contains "; + } else { + cond += " = "; + } + dquote(cond, item.GetValue().c_str()); + } + } + + return server.search(handle, + objid, cond.c_str(), dirbuf, + error); +} + +static bool +visitSong(const UPnPDirObject &meta, const char *path, + const DatabaseSelection &selection, + VisitSong visit_song, Error& error) +{ + if (!visit_song) + return true; + + LightSong song; + song.directory = nullptr; + song.uri = path; + song.real_uri = meta.url.c_str(); + song.tag = &meta.tag; + song.mtime = 0; + song.start_ms = song.end_ms = 0; + + return !selection.Match(song) || visit_song(song, error); +} + +/** + * Build synthetic path based on object id for search results. The use + * of "rootid" is arbitrary, any name that is not likely to be a top + * directory name would fit. + */ +static std::string +songPath(const std::string &servername, + const std::string &objid) +{ + return servername + "/" + rootid + "/" + objid; +} + +bool +UpnpDatabase::SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + VisitSong visit_song, + Error &error) const +{ + UPnPDirContent dirbuf; + if (!visit_song) + return true; + if (!SearchSongs(server, objid, selection, dirbuf, error)) + return false; + + for (auto &dirent : dirbuf.objects) { + if (dirent.type != UPnPDirObject::Type::ITEM || + dirent.item_class != UPnPDirObject::ItemClass::MUSIC) + continue; + + // We get song ids as the result of the UPnP search. But our + // client expects paths (e.g. we get 1$4$3788 from minidlna, + // but we need to translate to /Music/All_Music/Satisfaction). + // We can do this in two ways: + // - Rebuild a normal path using BuildPath() which is a kind of pwd + // - Build a bogus path based on the song id. + // The first method is nice because the returned paths are pretty, but + // it has two big problems: + // - The song paths are ambiguous: e.g. minidlna returns all search + // results as being from the "All Music" directory, which can + // contain several songs with the same title (but different objids) + // - The performance of BuildPath() is atrocious on very big + // directories, even causing timeouts in clients. And of + // course, 'All Music' is very big. + // So we return synthetic and ugly paths based on the object id, + // which we later have to detect. + const std::string path = songPath(server.getFriendlyName(), + dirent.m_id); + if (!visitSong(std::move(dirent), path.c_str(), + selection, visit_song, + error)) + return false; + } + + return true; +} + +bool +UpnpDatabase::ReadNode(const ContentDirectoryService &server, + const char *objid, UPnPDirObject &dirent, + Error &error) const +{ + UPnPDirContent dirbuf; + if (!server.getMetadata(handle, objid, dirbuf, error)) + return false; + + if (dirbuf.objects.size() == 1) { + dirent = std::move(dirbuf.objects.front()); + } else { + error.Format(upnp_domain, "Bad resource"); + return false; + } + + return true; +} + +bool +UpnpDatabase::BuildPath(const ContentDirectoryService &server, + const UPnPDirObject& idirent, + std::string &path, + Error &error) const +{ + const char *pid = idirent.m_id.c_str(); + path.clear(); + UPnPDirObject dirent; + while (strcmp(pid, rootid) != 0) { + if (!ReadNode(server, pid, dirent, error)) + return false; + pid = dirent.m_pid.c_str(); + + if (path.empty()) + path = dirent.name; + else + path = PathTraitsUTF8::Build(dirent.name.c_str(), + path.c_str()); + } + + path = PathTraitsUTF8::Build(server.getFriendlyName(), + path.c_str()); + return true; +} + +// Take server and internal title pathname and return objid and metadata. +bool +UpnpDatabase::Namei(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + UPnPDirObject &odirent, + Error &error) const +{ + if (vpath.empty()) { + // looking for root info + if (!ReadNode(server, rootid, odirent, error)) + return false; + + return true; + } + + std::string objid(rootid); + + // Walk the path elements, read each directory and try to find the next one + for (auto i = vpath.begin(), last = std::prev(vpath.end());; ++i) { + UPnPDirContent dirbuf; + if (!server.readDir(handle, objid.c_str(), dirbuf, error)) + return false; + + // Look for the name in the sub-container list + UPnPDirObject *child = dirbuf.FindObject(i->c_str()); + if (child == nullptr) { + error.Format(db_domain, DB_NOT_FOUND, + "No such object"); + return false; + } + + if (i == last) { + odirent = std::move(*child); + return true; + } + + if (child->type != UPnPDirObject::Type::CONTAINER) { + error.Format(db_domain, DB_NOT_FOUND, + "Not a container"); + return false; + } + + objid = std::move(child->m_id); + } +} + +static bool +VisitItem(const UPnPDirObject &object, const char *uri, + const DatabaseSelection &selection, + VisitSong visit_song, VisitPlaylist visit_playlist, + Error &error) +{ + assert(object.type == UPnPDirObject::Type::ITEM); + + switch (object.item_class) { + case UPnPDirObject::ItemClass::MUSIC: + return !visit_song || + visitSong(object, uri, + selection, visit_song, error); + + case UPnPDirObject::ItemClass::PLAYLIST: + if (visit_playlist) { + /* Note: I've yet to see a + playlist item (playlists + seem to be usually handled + as containers, so I'll + decide what to do when I + see one... */ + } + + return true; + + case UPnPDirObject::ItemClass::UNKNOWN: + return true; + } + + assert(false); + gcc_unreachable(); +} + +static bool +VisitObject(const UPnPDirObject &object, const char *uri, + const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) +{ + switch (object.type) { + case UPnPDirObject::Type::UNKNOWN: + assert(false); + gcc_unreachable(); + + case UPnPDirObject::Type::CONTAINER: + return !visit_directory || + visit_directory(LightDirectory(uri, 0), error); + + case UPnPDirObject::Type::ITEM: + return VisitItem(object, uri, selection, + visit_song, visit_playlist, + error); + } + + assert(false); + gcc_unreachable(); +} + +// vpath is a parsed and writeable version of selection.uri. There is +// really just one path parameter. +bool +UpnpDatabase::VisitServer(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + /* If the path begins with rootid, we know that this is a + song, not a directory (because that's how we set things + up). Just visit it. Note that the choice of rootid is + arbitrary, any value not likely to be the name of a top + directory would be ok. */ + /* !Note: this *can't* be handled by Namei further down, + because the path is not valid for traversal. Besides, it's + just faster to access the target node directly */ + if (!vpath.empty() && vpath.front() == rootid) { + switch (vpath.size()) { + case 1: + return true; + + case 2: + break; + + default: + error.Format(db_domain, DB_NOT_FOUND, + "Not found"); + return false; + } + + if (visit_song) { + UPnPDirObject dirent; + if (!ReadNode(server, vpath.back().c_str(), dirent, + error)) + return false; + + if (dirent.type != UPnPDirObject::Type::ITEM || + dirent.item_class != UPnPDirObject::ItemClass::MUSIC) { + error.Format(db_domain, DB_NOT_FOUND, + "Not found"); + return false; + } + + std::string path = songPath(server.getFriendlyName(), + dirent.m_id); + if (!visitSong(std::move(dirent), path.c_str(), + selection, + visit_song, error)) + return false; + } + return true; + } + + // Translate the target path into an object id and the associated metadata. + UPnPDirObject tdirent; + if (!Namei(server, vpath, tdirent, error)) + return false; + + /* If recursive is set, this is a search... No use sending it + if the filter is empty. In this case, we implement limited + recursion (1-deep) here, which will handle the "add dir" + case. */ + if (selection.recursive && selection.filter) + return SearchSongs(server, tdirent.m_id.c_str(), selection, + visit_song, error); + + const char *const base_uri = selection.uri.empty() + ? server.getFriendlyName() + : selection.uri.c_str(); + + if (tdirent.type == UPnPDirObject::Type::ITEM) { + return VisitItem(tdirent, base_uri, + selection, + visit_song, visit_playlist, + error); + } + + /* Target was a a container. Visit it. We could read slices + and loop here, but it's not useful as mpd will only return + data to the client when we're done anyway. */ + UPnPDirContent dirbuf; + if (!server.readDir(handle, tdirent.m_id.c_str(), dirbuf, + error)) + return false; + + for (auto &dirent : dirbuf.objects) { + const std::string uri = PathTraitsUTF8::Build(base_uri, + dirent.name.c_str()); + if (!VisitObject(dirent, uri.c_str(), + selection, + visit_directory, + visit_song, visit_playlist, + error)) + return false; + } + + return true; +} + +// Deal with the possibly multiple servers, call VisitServer if needed. +bool +UpnpDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + auto vpath = stringToTokens(selection.uri, "/", true); + if (vpath.empty()) { + std::vector<ContentDirectoryService> servers; + if (!discovery->getDirServices(servers, error)) + return false; + + for (const auto &server : servers) { + if (visit_directory) { + const LightDirectory d(server.getFriendlyName(), 0); + if (!visit_directory(d, error)) + return false; + } + + if (selection.recursive && + !VisitServer(server, vpath, selection, + visit_directory, visit_song, visit_playlist, + error)) + return false; + } + + return true; + } + + // We do have a path: the first element selects the server + std::string servername(std::move(vpath.front())); + vpath.pop_front(); + + ContentDirectoryService server; + if (!discovery->getServer(servername.c_str(), server, error)) + return false; + + return VisitServer(server, vpath, selection, + visit_directory, visit_song, visit_playlist, error); +} + +bool +UpnpDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag, gcc_unused uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + // TODO: use group_mask + + if (!visit_tag) + return true; + + std::vector<ContentDirectoryService> servers; + if (!discovery->getDirServices(servers, error)) + return false; + + std::set<std::string> values; + for (auto& server : servers) { + UPnPDirContent dirbuf; + if (!SearchSongs(server, rootid, selection, dirbuf, error)) + return false; + + for (const auto &dirent : dirbuf.objects) { + if (dirent.type != UPnPDirObject::Type::ITEM || + dirent.item_class != UPnPDirObject::ItemClass::MUSIC) + continue; + + const char *value = dirent.tag.GetValue(tag); + if (value != nullptr) { +#if defined(__clang__) || GCC_CHECK_VERSION(4,8) + values.emplace(value); +#else + values.insert(value); +#endif + } + } + } + + for (const auto& value : values) { + TagBuilder builder; + builder.AddItem(tag, value.c_str()); + if (!visit_tag(builder.Commit(), error)) + return false; + } + + return true; +} + +bool +UpnpDatabase::GetStats(const DatabaseSelection &, + DatabaseStats &stats, Error &) const +{ + /* Note: this gets called before the daemonizing so we can't + reallyopen this would be a problem if we had real stats */ + stats.song_count = 0; + stats.total_duration = 0; + stats.artist_count = 0; + stats.album_count = 0; + return true; +} + +const DatabasePlugin upnp_db_plugin = { + "upnp", + 0, + UpnpDatabase::Create, +}; diff --git a/src/db/plugins/upnp/UpnpDatabasePlugin.hxx b/src/db/plugins/upnp/UpnpDatabasePlugin.hxx new file mode 100644 index 000000000..0228405cd --- /dev/null +++ b/src/db/plugins/upnp/UpnpDatabasePlugin.hxx @@ -0,0 +1,27 @@ +/* + * 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. + */ + +#ifndef MPD_UPNP_DATABASE_PLUGIN_HXX +#define MPD_UPNP_DATABASE_PLUGIN_HXX + +struct DatabasePlugin; + +extern const DatabasePlugin upnp_db_plugin; + +#endif |