using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using Rssdp.Infrastructure;
namespace Rssdp
{
/// <summary>
/// Base class representing the common details of a (root or embedded) device, either to be published or that has been located.
/// </summary>
/// <remarks>
/// <para>Do not derive new types directly from this class. New device classes should derive from either <see cref="SsdpRootDevice"/> or <see cref="SsdpEmbeddedDevice"/>.</para>
/// </remarks>
/// <seealso cref="SsdpRootDevice"/>
/// <seealso cref="SsdpEmbeddedDevice"/>
public abstract class SsdpDevice
{
#region Fields
private string _Udn;
private string _DeviceType;
private string _DeviceTypeNamespace;
private int _DeviceVersion;
private SsdpDevicePropertiesCollection _CustomProperties;
private CustomHttpHeadersCollection _CustomResponseHeaders;
private IList<SsdpDevice> _Devices;
#endregion
#region Events
/// <summary>
/// Raised when a new child device is added.
/// </summary>
/// <seealso cref="AddDevice"/>
/// <seealso cref="DeviceAdded"/>
public event EventHandler<DeviceEventArgs> DeviceAdded;
/// <summary>
/// Raised when a child device is removed.
/// </summary>
/// <seealso cref="RemoveDevice"/>
/// <seealso cref="DeviceRemoved"/>
public event EventHandler<DeviceEventArgs> DeviceRemoved;
#endregion
#region Constructors
/// <summary>
/// Derived type constructor, allows constructing a device with no parent. Should only be used from derived types that are or inherit from <see cref="SsdpRootDevice"/>.
/// </summary>
protected SsdpDevice()
{
_DeviceTypeNamespace = SsdpConstants.UpnpDeviceTypeNamespace;
_DeviceType = SsdpConstants.UpnpDeviceTypeBasicDevice;
_DeviceVersion = 1;
this.Icons = new List<SsdpDeviceIcon>();
_Devices = new List<SsdpDevice>();
this.Devices = new ReadOnlyCollection<SsdpDevice>(_Devices);
_CustomResponseHeaders = new CustomHttpHeadersCollection();
_CustomProperties = new SsdpDevicePropertiesCollection();
}
/// <summary>
/// Deserialisation constructor.
/// </summary>
/// <remarks><para>Uses the provided XML string and parent device properties to set the properties of the object. The XML provided must be a valid UPnP device description document.</para></remarks>
/// <param name="deviceDescriptionXml">A UPnP device description XML document.</param>
/// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="deviceDescriptionXml"/> argument is null.</exception>
/// <exception cref="System.ArgumentException">Thrown if the <paramref name="deviceDescriptionXml"/> argument is empty.</exception>
protected SsdpDevice(string deviceDescriptionXml)
: this()
{
if (deviceDescriptionXml == null) throw new ArgumentNullException("deviceDescriptionXml");
if (deviceDescriptionXml.Length == 0) throw new ArgumentException("deviceDescriptionXml cannot be an empty string.", "deviceDescriptionXml");
using (var ms = new System.IO.MemoryStream(System.Text.UTF8Encoding.UTF8.GetBytes(deviceDescriptionXml)))
{
var reader = XmlReader.Create(ms);
LoadDeviceProperties(reader, this);
}
}
#endregion
#region Public Properties
#region UPnP Device Description Properties
/// <summary>
/// Sets or returns the core device type (not including namespace, version etc.). Required.
/// </summary>
/// <remarks><para>Defaults to the UPnP basic device type.</para></remarks>
/// <seealso cref="DeviceTypeNamespace"/>
/// <seealso cref="DeviceVersion"/>
/// <seealso cref="FullDeviceType"/>
public string DeviceType
{
get
{
return _DeviceType;
}
set
{
_DeviceType = value;
}
}
public string DeviceClass { get; set; }
/// <summary>
/// Sets or returns the namespace for the <see cref="DeviceType"/> of this device. Optional, but defaults to UPnP schema so should be changed if <see cref="DeviceType"/> is not a UPnP device type.
/// </summary>
/// <remarks><para>Defaults to the UPnP standard namespace.</para></remarks>
/// <seealso cref="DeviceType"/>
/// <seealso cref="DeviceVersion"/>
/// <seealso cref="FullDeviceType"/>
public string DeviceTypeNamespace
{
get
{
return _DeviceTypeNamespace;
}
set
{
_DeviceTypeNamespace = value;
}
}
/// <summary>
/// Sets or returns the version of the device type. Optional, defaults to 1.
/// </summary>
/// <remarks><para>Defaults to a value of 1.</para></remarks>
/// <seealso cref="DeviceType"/>
/// <seealso cref="DeviceTypeNamespace"/>
/// <seealso cref="FullDeviceType"/>
public int DeviceVersion
{
get
{
return _DeviceVersion;
}
set
{
_DeviceVersion = value;
}
}
/// <summary>
/// Returns the full device type string.
/// </summary>
/// <remarks>
/// <para>The format used is urn:<see cref="DeviceTypeNamespace"/>:device:<see cref="DeviceType"/>:<see cref="DeviceVersion"/></para>
/// </remarks>
public string FullDeviceType
{
get
{
return String.Format("urn:{0}:{3}:{1}:{2}",
this.DeviceTypeNamespace ?? String.Empty,
this.DeviceType ?? String.Empty,
this.DeviceVersion,
this.DeviceClass ?? "device");
}
}
/// <summary>
/// Sets or returns the universally unique identifier for this device (without the uuid: prefix). Required.
/// </summary>
/// <remarks>
/// <para>Must be the same over time for a specific device instance (i.e. must survive reboots).</para>
/// <para>For UPnP 1.0 this can be any unique string. For UPnP 1.1 this should be a 128 bit number formatted in a specific way, preferably generated using the time and MAC based algorithm. See section 1.1.4 of http://upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf for details.</para>
/// <para>Technically this library implements UPnP 1.0, so any value is allowed, but we advise using UPnP 1.1 compatible values for good behaviour and forward compatibility with future versions.</para>
/// </remarks>
public string Uuid { get; set; }
/// <summary>
/// Returns (or sets*) a unique device name for this device. Optional, not recommended to be explicitly set.
/// </summary>
/// <remarks>
/// <para>* In general you should not explicitly set this property. If it is not set (or set to null/empty string) the property will return a UDN value that is correct as per the UPnP specification, based on the other device properties.</para>
/// <para>The setter is provided to allow for devices that do not correctly follow the specification (when we discover them), rather than to intentionally deviate from the specification.</para>
/// <para>If a value is explicitly set, it is used verbatim, and so any prefix (such as uuid:) must be provided in the value.</para>
/// </remarks>
public string Udn
{
get
{
if (String.IsNullOrEmpty(_Udn) && !String.IsNullOrEmpty(this.Uuid))
return "uuid:" + this.Uuid;
else
return _Udn;
}
set
{
_Udn = value;
}
}
/// <summary>
/// Sets or returns a friendly/display name for this device on the network. Something the user can identify the device/instance by, i.e Lounge Main Light. Required.
/// </summary>
/// <remarks><para>A short description for the end user. </para></remarks>
public string FriendlyName { get; set; }
/// <summary>
/// Sets or returns the name of the manufacturer of this device. Required.
/// </summary>
public string Manufacturer { get; set; }
/// <summary>
/// Sets or returns a URL to the manufacturers web site. Optional.
/// </summary>
public Uri ManufacturerUrl { get; set; }
/// <summary>
/// Sets or returns a description of this device model. Recommended.
/// </summary>
/// <remarks><para>A long description for the end user.</para></remarks>
public string ModelDescription { get; set; }
/// <summary>
/// Sets or returns the name of this model. Required.
/// </summary>
public string ModelName { get; set; }
/// <summary>
/// Sets or returns the number of this model. Recommended.
/// </summary>
public string ModelNumber { get; set; }
/// <summary>
/// Sets or returns a URL to a web page with details of this device model. Optional.
/// </summary>
/// <remarks>
/// <para>Optional. May be relative to base URL.</para>
/// </remarks>
public Uri ModelUrl { get; set; }
/// <summary>
/// Sets or returns the serial number for this device. Recommended.
/// </summary>
public string SerialNumber { get; set; }
/// <summary>
/// Sets or returns the universal product code of the device, if any. Optional.
/// </summary>
/// <remarks>
/// <para>If not blank, must be exactly 12 numeric digits.</para>
/// </remarks>
public string Upc { get; set; }
/// <summary>
/// Sets or returns the URL to a web page that can be used to configure/manager/use the device. Recommended.
/// </summary>
/// <remarks>
/// <para>May be relative to base URL. </para>
/// </remarks>
public Uri PresentationUrl { get; set; }
#endregion
/// <summary>
/// Returns a list of icons (images) that can be used to display this device. Optional, but recommended you provide at least one at 48x48 pixels.
/// </summary>
public IList<SsdpDeviceIcon> Icons
{
get;
private set;
}
/// <summary>
/// Returns a read-only enumerable set of <see cref="SsdpDevice"/> objects representing children of this device. Child devices are optional.
/// </summary>
/// <seealso cref="AddDevice"/>
/// <seealso cref="RemoveDevice"/>
public IEnumerable<SsdpDevice> Devices
{
get;
private set;
}
/// <summary>
/// Returns a dictionary of <see cref="SsdpDeviceProperty"/> objects keyed by <see cref="SsdpDeviceProperty.FullName"/>. Each value represents a custom property in the device description document.
/// </summary>
public SsdpDevicePropertiesCollection CustomProperties
{
get
{
return _CustomProperties;
}
}
/// <summary>
/// Provides a list of additional information to provide about this device in search response and notification messages.
/// </summary>
/// <remarks>
/// <para>The headers included here are included in the (HTTP headers) for search response and alive notifications sent in relation to this device.</para>
/// <para>Only values specified directly on this <see cref="SsdpDevice"/> instance will be included, headers from ancestors are not automatically included.</para>
/// </remarks>
public CustomHttpHeadersCollection CustomResponseHeaders
{
get
{
return _CustomResponseHeaders;
}
}
#endregion
#region Public Methods
/// <summary>
/// Adds a child device to the <see cref="Devices"/> collection.
/// </summary>
/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance to add.</param>
/// <remarks>
/// <para>If the device is already a member of the <see cref="Devices"/> collection, this method does nothing.</para>
/// <para>Also sets the <see cref="SsdpEmbeddedDevice.RootDevice"/> property of the added device and all descendant devices to the relevant <see cref="SsdpRootDevice"/> instance.</para>
/// </remarks>
/// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception>
/// <exception cref="System.InvalidOperationException">Thrown if the <paramref name="device"/> is already associated with a different <see cref="SsdpRootDevice"/> instance than used in this tree. Can occur if you try to add the same device instance to more than one tree. Also thrown if you try to add a device to itself.</exception>
/// <seealso cref="DeviceAdded"/>
public void AddDevice(SsdpEmbeddedDevice device)
{
if (device == null) throw new ArgumentNullException("device");
if (device.RootDevice != null && device.RootDevice != this.ToRootDevice()) throw new InvalidOperationException("This device is already associated with a different root device (has been added as a child in another branch).");
if (device == this) throw new InvalidOperationException("Can't add device to itself.");
bool wasAdded = false;
lock (_Devices)
{
device.RootDevice = this.ToRootDevice();
_Devices.Add(device);
wasAdded = true;
}
if (wasAdded)
OnDeviceAdded(device);
}
/// <summary>
/// Removes a child device from the <see cref="Devices"/> collection.
/// </summary>
/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance to remove.</param>
/// <remarks>
/// <para>If the device is not a member of the <see cref="Devices"/> collection, this method does nothing.</para>
/// <para>Also sets the <see cref="SsdpEmbeddedDevice.RootDevice"/> property to null for the removed device and all descendant devices.</para>
/// </remarks>
/// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="device"/> argument is null.</exception>
/// <seealso cref="DeviceRemoved"/>
public void RemoveDevice(SsdpEmbeddedDevice device)
{
if (device == null) throw new ArgumentNullException("device");
bool wasRemoved = false;
lock (_Devices)
{
wasRemoved = _Devices.Remove(device);
if (wasRemoved)
{
device.RootDevice = null;
}
}
if (wasRemoved)
OnDeviceRemoved(device);
}
/// <summary>
/// Raises the <see cref="DeviceAdded"/> event.
/// </summary>
/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance added to the <see cref="Devices"/> collection.</param>
/// <seealso cref="AddDevice"/>
/// <seealso cref="DeviceAdded"/>
protected virtual void OnDeviceAdded(SsdpEmbeddedDevice device)
{
var handlers = this.DeviceAdded;
if (handlers != null)
handlers(this, new DeviceEventArgs(device));
}
/// <summary>
/// Raises the <see cref="DeviceRemoved"/> event.
/// </summary>
/// <param name="device">The <see cref="SsdpEmbeddedDevice"/> instance removed from the <see cref="Devices"/> collection.</param>
/// <seealso cref="RemoveDevice"/>
/// <see cref="DeviceRemoved"/>
protected virtual void OnDeviceRemoved(SsdpEmbeddedDevice device)
{
var handlers = this.DeviceRemoved;
if (handlers != null)
handlers(this, new DeviceEventArgs(device));
}
/// <summary>
/// Writes this device to the specified <see cref="System.Xml.XmlWriter"/> as a device node and it's content.
/// </summary>
/// <param name="writer">The <see cref="System.Xml.XmlWriter"/> to output to.</param>
/// <param name="device">The <see cref="SsdpDevice"/> to write out.</param>
/// <exception cref="System.ArgumentNullException">Thrown if the <paramref name="writer"/> or <paramref name="device"/> argument is null.</exception>
protected virtual void WriteDeviceDescriptionXml(XmlWriter writer, SsdpDevice device)
{
if (writer == null) throw new ArgumentNullException("writer");
if (device == null) throw new ArgumentNullException("device");
writer.WriteStartElement("device");
if (!String.IsNullOrEmpty(device.FullDeviceType))
WriteNodeIfNotEmpty(writer, "deviceType", device.FullDeviceType);
WriteNodeIfNotEmpty(writer, "friendlyName", device.FriendlyName);
WriteNodeIfNotEmpty(writer, "manufacturer", device.Manufacturer);
WriteNodeIfNotEmpty(writer, "manufacturerURL", device.ManufacturerUrl);
WriteNodeIfNotEmpty(writer, "modelDescription", device.ModelDescription);
WriteNodeIfNotEmpty(writer, "modelName", device.ModelName);
WriteNodeIfNotEmpty(writer, "modelNumber", device.ModelNumber);
WriteNodeIfNotEmpty(writer, "modelURL", device.ModelUrl);
WriteNodeIfNotEmpty(writer, "presentationURL", device.PresentationUrl);
WriteNodeIfNotEmpty(writer, "serialNumber", device.SerialNumber);
WriteNodeIfNotEmpty(writer, "UDN", device.Udn);
WriteNodeIfNotEmpty(writer, "UPC", device.Upc);
WriteCustomProperties(writer, device);
WriteIcons(writer, device);
WriteChildDevices(writer, device);
writer.WriteEndElement();
}
/// <summary>
/// Converts a string to a <see cref="Uri"/>, or returns null if the string provided is null.
/// </summary>
/// <param name="value">The string value to convert.</param>
/// <returns>A <see cref="Uri"/>.</returns>
protected static Uri StringToUri(string value)
{
if (!String.IsNullOrEmpty(value))
return new Uri(value, UriKind.RelativeOrAbsolute);
return null;
}
#endregion
#region Private Methods
#region Serialisation Methods
private static void WriteCustomProperties(XmlWriter writer, SsdpDevice device)
{
foreach (var prop in device.CustomProperties)
{
writer.WriteElementString(prop.Namespace, prop.Name, SsdpConstants.SsdpDeviceDescriptionXmlNamespace, prop.Value);
}
}
private static void WriteIcons(XmlWriter writer, SsdpDevice device)
{
if (device.Icons.Any())
{
writer.WriteStartElement("iconList");
foreach (var icon in device.Icons)
{
writer.WriteStartElement("icon");
writer.WriteElementString("mimetype", icon.MimeType);
writer.WriteElementString("width", icon.Width.ToString());
writer.WriteElementString("height", icon.Height.ToString());
writer.WriteElementString("depth", icon.ColorDepth.ToString());
writer.WriteElementString("url", icon.Url.ToString());
writer.WriteEndElement();
}
writer.WriteEndElement();
}
}
private void WriteChildDevices(XmlWriter writer, SsdpDevice parentDevice)
{
if (parentDevice.Devices.Any())
{
writer.WriteStartElement("deviceList");
foreach (var device in parentDevice.Devices)
{
WriteDeviceDescriptionXml(writer, device);
}
writer.WriteEndElement();
}
}
private static void WriteNodeIfNotEmpty(XmlWriter writer, string nodeName, string value)
{
if (!String.IsNullOrEmpty(value))
writer.WriteElementString(nodeName, value);
}
private static void WriteNodeIfNotEmpty(XmlWriter writer, string nodeName, Uri value)
{
if (value != null)
writer.WriteElementString(nodeName, value.ToString());
}
#endregion
#region Deserialisation Methods
private void LoadDeviceProperties(XmlReader reader, SsdpDevice device)
{
ReadUntilDeviceNode(reader);
while (!reader.EOF)
{
if (reader.NodeType == XmlNodeType.EndElement && reader.Name == "device")
{
reader.Read();
break;
}
if (!SetPropertyFromReader(reader, device))
reader.Read();
}
}
private static void ReadUntilDeviceNode(XmlReader reader)
{
while (!reader.EOF && (reader.LocalName != "device" || reader.NodeType != XmlNodeType.Element))
{
reader.Read();
}
}
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "Yes, there is a large switch statement, not it's not really complex and doesn't really need to be rewritten at this point.")]
private bool SetPropertyFromReader(XmlReader reader, SsdpDevice device)
{
switch (reader.LocalName)
{
case "friendlyName":
device.FriendlyName = reader.ReadElementContentAsString();
break;
case "manufacturer":
device.Manufacturer = reader.ReadElementContentAsString();
break;
case "manufacturerURL":
device.ManufacturerUrl = StringToUri(reader.ReadElementContentAsString());
break;
case "modelDescription":
device.ModelDescription = reader.ReadElementContentAsString();
break;
case "modelName":
device.ModelName = reader.ReadElementContentAsString();
break;
case "modelNumber":
device.ModelNumber = reader.ReadElementContentAsString();
break;
case "modelURL":
device.ModelUrl = StringToUri(reader.ReadElementContentAsString());
break;
case "presentationURL":
device.PresentationUrl = StringToUri(reader.ReadElementContentAsString());
break;
case "serialNumber":
device.SerialNumber = reader.ReadElementContentAsString();
break;
case "UDN":
device.Udn = reader.ReadElementContentAsString();
SetUuidFromUdn(device);
break;
case "UPC":
device.Upc = reader.ReadElementContentAsString();
break;
case "deviceType":
SetDeviceTypePropertiesFromFullDeviceType(device, reader.ReadElementContentAsString());
break;
case "iconList":
reader.Read();
LoadIcons(reader, device);
break;
case "deviceList":
reader.Read();
LoadChildDevices(reader, device);
break;
case "serviceList":
reader.Skip();
break;
default:
if (reader.NodeType == XmlNodeType.Element && reader.Name != "device" && reader.Name != "icon")
{
AddCustomProperty(reader, device);
break;
}
else
return false;
}
return true;
}
private static void SetDeviceTypePropertiesFromFullDeviceType(SsdpDevice device, string value)
{
if (String.IsNullOrEmpty(value) || !value.Contains(":"))
device.DeviceType = value;
else
{
var parts = value.Split(':');
if (parts.Length == 5)
{
int deviceVersion = 1;
if (Int32.TryParse(parts[4], out deviceVersion))
{
device.DeviceTypeNamespace = parts[1];
device.DeviceType = parts[3];
device.DeviceVersion = deviceVersion;
}
else
device.DeviceType = value;
}
else
device.DeviceType = value;
}
}
private static void SetUuidFromUdn(SsdpDevice device)
{
if (device.Udn != null && device.Udn.StartsWith("uuid:", StringComparison.OrdinalIgnoreCase))
device.Uuid = device.Udn.Substring(5).Trim();
else
device.Uuid = device.Udn;
}
private static void LoadIcons(XmlReader reader, SsdpDevice device)
{
while (!reader.EOF)
{
while (!reader.EOF && reader.NodeType != XmlNodeType.Element)
{
reader.Read();
}
if (reader.LocalName != "icon") break;
while (reader.Name == "icon")
{
var icon = new SsdpDeviceIcon();
LoadIconProperties(reader, icon);
device.Icons.Add(icon);
reader.Read();
}
}
}
private static void LoadIconProperties(XmlReader reader, SsdpDeviceIcon icon)
{
while (!reader.EOF)
{
if (reader.NodeType != XmlNodeType.Element)
{
if (reader.NodeType == XmlNodeType.EndElement && reader.Name == "icon") break;
reader.Read();
continue;
}
switch (reader.LocalName)
{
case "depth":
icon.ColorDepth = reader.ReadElementContentAsInt();
break;
case "height":
icon.Height = reader.ReadElementContentAsInt();
break;
case "width":
icon.Width = reader.ReadElementContentAsInt();
break;
case "mimetype":
icon.MimeType = reader.ReadElementContentAsString();
break;
case "url":
icon.Url = StringToUri(reader.ReadElementContentAsString());
break;
}
reader.Read();
}
}
private void LoadChildDevices(XmlReader reader, SsdpDevice device)
{
while (!reader.EOF && reader.NodeType != XmlNodeType.Element)
{
reader.Read();
}
while (!reader.EOF)
{
while (!reader.EOF && reader.NodeType != XmlNodeType.Element)
{
reader.Read();
}
if (reader.LocalName == "device")
{
var childDevice = new SsdpEmbeddedDevice();
LoadDeviceProperties(reader, childDevice);
device.AddDevice(childDevice);
}
else
break;
}
}
private static void AddCustomProperty(XmlReader reader, SsdpDevice device)
{
var newProp = new SsdpDeviceProperty() { Namespace = reader.Prefix, Name = reader.LocalName };
int depth = reader.Depth;
reader.Read();
while (reader.NodeType == XmlNodeType.Whitespace || reader.NodeType == XmlNodeType.Comment)
{
reader.Read();
}
if (reader.NodeType != XmlNodeType.CDATA && reader.NodeType != XmlNodeType.Text)
{
while (!reader.EOF && (reader.NodeType != XmlNodeType.EndElement || reader.Name != newProp.Name || reader.Prefix != newProp.Namespace || reader.Depth != depth))
{
reader.Read();
}
if (!reader.EOF)
reader.Read();
return;
}
newProp.Value = reader.Value;
// We don't support complex nested types or repeat/multi-value properties
if (!device.CustomProperties.Contains(newProp.FullName))
device.CustomProperties.Add(newProp);
}
#endregion
//private bool ChildDeviceExists(SsdpDevice device)
//{
// return (from d in _Devices where device.Uuid == d.Uuid select d).Any();
//}
#endregion
}
}