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/*
* Copyright 2003-2018 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 _UPNPDIR_HXX_INCLUDED_
#define _UPNPDIR_HXX_INCLUDED_
#include "util/Compiler.h"
#include <upnp.h>
#include <string>
#include <forward_list>
class UPnPDevice;
struct UPnPService;
class UPnPDirContent;
/**
* Content Directory Service class.
*
* This stores identity data from a directory service
* and the device it belongs to, and has methods to query
* the directory, using libupnp for handling the UPnP protocols.
*
* Note: m_rdreqcnt: number of entries requested per directory read.
* 0 means all entries. The device can still return less entries than
* requested, depending on its own limits. In general it's not optimal
* becauses it triggers issues, and is sometimes actually slower, e.g. on
* a D-Link NAS 327
*
* The value chosen may affect by the UpnpSetMaxContentLength
* (2000*1024) done during initialization, but this should be ample
*/
class ContentDirectoryService {
std::string m_actionURL;
std::string m_serviceType;
std::string m_deviceId;
std::string m_friendlyName;
std::string m_manufacturer;
std::string m_modelName;
int m_rdreqcnt; // Slice size to use when reading
public:
/**
* Construct by copying data from device and service objects.
*
* The discovery service does this: use
* UPnPDeviceDirectory::GetDirectories()
*/
ContentDirectoryService(const UPnPDevice &device,
const UPnPService &service) noexcept;
/** An empty one */
ContentDirectoryService() = default;
~ContentDirectoryService() noexcept;
/** Read a container's children list into dirbuf.
*
* @param objectId the UPnP object Id for the container. Root has Id "0"
*/
UPnPDirContent readDir(UpnpClient_Handle handle,
const char *objectId) const;
void readDirSlice(UpnpClient_Handle handle,
const char *objectId, unsigned offset,
unsigned count, UPnPDirContent& dirbuf,
unsigned &didread, unsigned &total) const;
/** Search the content directory service.
*
* @param objectId the UPnP object Id under which the search
* should be done. Not all servers actually support this below
* root. Root has Id "0"
* @param searchstring an UPnP searchcriteria string. Check the
* UPnP document: UPnP-av-ContentDirectory-v1-Service-20020625.pdf
* section 2.5.5. Maybe we'll provide an easier way some day...
*/
UPnPDirContent search(UpnpClient_Handle handle,
const char *objectId,
const char *searchstring) const;
/** Read metadata for a given node.
*
* @param objectId the UPnP object Id. Root has Id "0"
*/
UPnPDirContent getMetadata(UpnpClient_Handle handle,
const char *objectId) const;
/** Retrieve search capabilities
*
* Throws std::runtime_error on error.
*
* @param[out] result an empty vector: no search, or a single '*' element:
* any tag can be used in a search, or a list of usable tag names.
*/
std::forward_list<std::string> getSearchCapabilities(UpnpClient_Handle handle) const;
gcc_pure
std::string GetURI() const noexcept {
return "upnp://" + m_deviceId + "/" + m_serviceType;
}
/** Retrieve the "friendly name" for this server, useful for display. */
const char *getFriendlyName() const noexcept {
return m_friendlyName.c_str();
}
};
#endif /* _UPNPDIR_HXX_INCLUDED_ */
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