protected virtual bool ContextEqual(string contextPlain)
{
if (Size == 0 && (string.IsNullOrEmpty(contextPlain) || contextPlain == "0"))
{
return(true);
}
try
{
XmlDocument msnObjectDocument = new XmlDocument();
msnObjectDocument.LoadXml(contextPlain);
XmlNode msnObjectNode = msnObjectDocument.SelectSingleNode("msnobj");
string sha = msnObjectNode.Attributes["SHA1D"].InnerText;
string creator = msnObjectNode.Attributes["Creator"].InnerText;
MSNObjectType type = (MSNObjectType)int.Parse(msnObjectNode.Attributes["Type"].InnerText);
return(Sha == sha && Creator == creator && type == ObjectType);
}
catch (Exception ex)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceError, "MSNObject compare error: context " +
contextPlain + " is not a valid context for MSNObject.\r\n Error description: " +
ex.Message + "\r\n Stack Trace: " + ex.StackTrace);
return(true);
}
}
/// <summary>
/// Constructs a MSN object based on a (memory)stream. The client programmer is responsible for inserting this object in the global msn object collection.
/// The stream must remain open during the whole life-length of the application.
/// </summary>
/// <param name="creator"></param>
/// <param name="inputStream"></param>
/// <param name="type"></param>
/// <param name="location"></param>
public MSNObject(string creator, Stream inputStream, MSNObjectType type, string location)
{
this.creator = creator;
this.size = (int)inputStream.Length;
this.type = type;
this.location = location;
this.sha = GetStreamHash(inputStream);
this.DataStream = new PersistentStream(inputStream);
}
/// <summary>
/// Constructs a MSN object based on a physical file. The client programmer is responsible for inserting this object in the global msn object collection.
/// </summary>
/// <param name="creator"></param>
/// <param name="type"></param>
/// <param name="fileLocation"></param>
public MSNObject(string creator, string fileLocation, MSNObjectType type)
{
this.location = Path.GetFullPath(fileLocation).Replace(Path.GetPathRoot(fileLocation), "");
this.location += new Random().Next().ToString(CultureInfo.InvariantCulture);
this.fileLocation = fileLocation;
Stream stream = OpenStream();
this.creator = creator;
this.size = (int)stream.Length;
this.type = type;
this.sha = GetStreamHash(stream);
stream.Close();
}
/// <summary>
/// Parses a context send by the remote contact and set the corresponding class variables.
/// </summary>
/// <param name="context"></param>
/// <param name="base64Encoded"></param>
public virtual void SetContext(string context, bool base64Encoded)
{
if (base64Encoded)
context = System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(context));
string xmlString = GetDecodeString(context);
try
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlString);
XmlNode msnObjNode = xmlDoc.SelectSingleNode("//msnobj");
foreach (XmlNode attr in msnObjNode.Attributes)
{
string val = attr.Value;
switch (attr.Name.ToLowerInvariant())
{
case "creator":
this.creator = val;
break;
case "size":
this.size = int.Parse(val, System.Globalization.CultureInfo.InvariantCulture);
break;
case "type":
{
switch (val)
{
case "2":
type = MSNObjectType.Emoticon;
break;
case "3":
type = MSNObjectType.UserDisplay;
break;
case "5":
type = MSNObjectType.Background;
break;
case "8":
type = MSNObjectType.Wink;
break;
case "16":
type = MSNObjectType.Scene;
break;
}
break;
}
case "location":
this.location = val;
break;
case "sha1d":
this.sha = val.Replace(' ', '+');
break;
}
}
}
catch (Exception ex)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceError, "MSNObject Set Conext error: context " +
xmlString + " is not a valid context for MSNObject.\r\n Error description: " +
ex.Message + "\r\n Stack Trace: " + ex.StackTrace);
}
}
/// <summary>
/// Constructs a MSN object based on a physical file. The client programmer is responsible for inserting this object in the global msn object collection.
/// </summary>
/// <param name="creator"></param>
/// <param name="type"></param>
/// <param name="fileLocation"></param>
public MSNObject(string creator, string fileLocation, MSNObjectType type)
{
this.location = Path.GetFullPath(fileLocation).Replace(Path.GetPathRoot(fileLocation), "");
this.location += new Random().Next().ToString(CultureInfo.InvariantCulture);
this.fileLocation = fileLocation;
Stream stream = OpenStream();
this.creator = creator;
this.size = (int)stream.Length;
this.type = type;
this.sha = GetStreamHash(stream);
stream.Close();
}
/// <summary>
/// Constructs a MSN object based on a (memory)stream. The client programmer is responsible for inserting this object in the global msn object collection.
/// The stream must remain open during the whole life-length of the application.
/// </summary>
/// <param name="creator"></param>
/// <param name="inputStream"></param>
/// <param name="type"></param>
/// <param name="location"></param>
public MSNObject(string creator, Stream inputStream, MSNObjectType type, string location)
{
this.creator = creator;
this.size = (int)inputStream.Length;
this.type = type;
this.location = location;
this.sha = GetStreamHash(inputStream);
this.DataStream = new PersistentStream(inputStream);
}
/// <summary>
/// Parses a context send by the remote contact and set the corresponding class variables.
/// </summary>
/// <param name="context"></param>
/// <param name="base64Encoded"></param>
public virtual void SetContext(string context, bool base64Encoded)
{
if (base64Encoded)
{
context = System.Text.Encoding.UTF8.GetString(Convert.FromBase64String(context));
}
string xmlString = GetDecodeString(context);
try
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.LoadXml(xmlString);
XmlNode msnObjNode = xmlDoc.SelectSingleNode("//msnobj");
foreach (XmlNode attr in msnObjNode.Attributes)
{
string val = attr.Value;
switch (attr.Name.ToLowerInvariant())
{
case "creator":
this.creator = val;
break;
case "size":
this.size = int.Parse(val, System.Globalization.CultureInfo.InvariantCulture);
break;
case "type":
{
switch (val)
{
case "2":
type = MSNObjectType.Emoticon;
break;
case "3":
type = MSNObjectType.UserDisplay;
break;
case "5":
type = MSNObjectType.Background;
break;
case "8":
type = MSNObjectType.Wink;
break;
case "16":
type = MSNObjectType.Scene;
break;
}
break;
}
case "location":
this.location = val;
break;
case "sha1d":
this.sha = val.Replace(' ', '+');
break;
}
}
}
catch (Exception ex)
{
Trace.WriteLineIf(Settings.TraceSwitch.TraceError, "MSNObject Set Conext error: context " +
xmlString + " is not a valid context for MSNObject.\r\n Error description: " +
ex.Message + "\r\n Stack Trace: " + ex.StackTrace);
}
}
