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Diffstat (limited to 'src/db/upnp/Directory.cxx')
| -rw-r--r-- | src/db/upnp/Directory.cxx | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/src/db/upnp/Directory.cxx b/src/db/upnp/Directory.cxx new file mode 100644 index 000000000..895e767be --- /dev/null +++ b/src/db/upnp/Directory.cxx @@ -0,0 +1,177 @@ +/* + * 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 "Util.hxx" +#include "Expat.hxx" + +#include <string> +#include <vector> +#include <map> + +#include <string.h> + +static const char *const upnptags[] = { + "upnp:artist", + "upnp:album", + "upnp:genre", + "upnp:originalTrackNumber", + "upnp:class", +}; +static const int nupnptags = sizeof(upnptags) / sizeof(char*); + +/** + * An XML parser which builds directory contents from DIDL lite input. + */ +class UPnPDirParser final : public CommonExpatParser { + struct StackEl { + StackEl(const std::string& nm) : name(nm) {} + std::string name; + std::map<std::string,std::string> attributes; + }; + + std::vector<StackEl> m_path; + UPnPDirObject m_tobj; + std::map<std::string, UPnPDirObject::ItemClass> m_okitems; + +public: + UPnPDirParser(UPnPDirContent& dir) + :m_dir(dir) + { + m_okitems["object.item.audioItem.musicTrack"] = + UPnPDirObject::audioItem_musicTrack; + m_okitems["object.item.playlistItem"] = + UPnPDirObject::audioItem_playlist; + } + UPnPDirContent& m_dir; + +protected: + virtual void StartElement(const XML_Char *name, const XML_Char **attrs) + { + m_path.push_back(StackEl(name)); + for (int i = 0; attrs[i] != 0; i += 2) { + m_path.back().attributes[attrs[i]] = attrs[i+1]; + } + + switch (name[0]) { + case 'c': + if (!strcmp(name, "container")) { + m_tobj.clear(); + m_tobj.m_type = UPnPDirObject::container; + m_tobj.m_id = m_path.back().attributes["id"]; + m_tobj.m_pid = m_path.back().attributes["parentID"]; + } + break; + case 'i': + if (!strcmp(name, "item")) { + m_tobj.clear(); + m_tobj.m_type = UPnPDirObject::item; + m_tobj.m_id = m_path.back().attributes["id"]; + m_tobj.m_pid = m_path.back().attributes["parentID"]; + } + break; + default: + break; + } + } + + bool checkobjok() { + bool ok = !m_tobj.m_id.empty() && !m_tobj.m_pid.empty() && + !m_tobj.m_title.empty(); + + if (ok && m_tobj.m_type == UPnPDirObject::item) { + auto it = m_okitems.find(m_tobj.m_props["upnp:class"]); + if (it == m_okitems.end()) { + PLOGINF("checkobjok: found object of unknown class: [%s]\n", + m_tobj.m_props["upnp:class"].c_str()); + ok = false; + } else { + m_tobj.m_iclass = it->second; + } + } + + if (!ok) { + PLOGINF("checkobjok: skip: id [%s] pid [%s] clss [%s] tt [%s]\n", + m_tobj.m_id.c_str(), m_tobj.m_pid.c_str(), + m_tobj.m_props["upnp:class"].c_str(), + m_tobj.m_title.c_str()); + } + return ok; + } + + virtual void EndElement(const XML_Char *name) + { + if (!strcmp(name, "container")) { + if (checkobjok()) { + m_dir.m_containers.push_back(m_tobj); + } + } else if (!strcmp(name, "item")) { + if (checkobjok()) { + m_dir.m_items.push_back(m_tobj); + } + } else if (!strcmp(name, "res")) { + // <res protocolInfo="http-get:*:audio/mpeg:*" size="5171496" + // bitrate="24576" duration="00:03:35" sampleFrequency="44100" + // nrAudioChannels="2"> + std::string s; + s="protocolInfo";m_tobj.m_props[s] = m_path.back().attributes[s]; + s="size";m_tobj.m_props[s] = m_path.back().attributes[s]; + s="bitrate";m_tobj.m_props[s] = m_path.back().attributes[s]; + s="duration";m_tobj.m_props[s] = m_path.back().attributes[s]; + s="sampleFrequency";m_tobj.m_props[s] = m_path.back().attributes[s]; + s="nrAudioChannels";m_tobj.m_props[s] = m_path.back().attributes[s]; + } + + m_path.pop_back(); + } + + virtual void CharacterData(const XML_Char *s, int len) + { + if (s == 0 || *s == 0) + return; + std::string str(s, len); + trimstring(str); + switch (m_path.back().name[0]) { + case 'd': + if (!m_path.back().name.compare("dc:title")) + m_tobj.m_title += str; + break; + case 'r': + if (!m_path.back().name.compare("res")) { + m_tobj.m_props["url"] += str; + } + break; + case 'u': + for (int i = 0; i < nupnptags; i++) { + if (!m_path.back().name.compare(upnptags[i])) { + m_tobj.m_props[upnptags[i]] += str; + } + } + break; + } + } +}; + +bool +UPnPDirContent::parse(const std::string &input, Error &error) +{ + UPnPDirParser parser(*this); + return parser.Parse(input.data(), input.length(), true, error); +} |