/// <summary>
/// Dynamically load assemblies into the API based on what interfaces they implement. Used to allow
/// 3rd parties to add custom CapabilitySenders and CapabilityViewers without recompiling the application
/// or changing its source code.
/// </summary>
/// <remarks>
/// Because this section of code frequently excepts when a developer is creating a new Capability and does something wrong,
/// we both write to the event log and display a message box so that the developer can find the error quickly. In experience,
/// just writing to the event log causes failures that new developers don't easily find.
/// </remarks>
public static void InitializeCapabilityClasses(out CapabilityViewerClassHashtable capabilityViewerClasses,
out CapabilitySenderClassHashtable capabilitySenderClasses)
{
// Initialize outbound parameters
capabilityViewerClasses = new CapabilityViewerClassHashtable();
capabilitySenderClasses = new CapabilitySenderClassHashtable();
#region Default RTDocs viewer from app.config
// Before starting to iterate through .dll's, check to see if a default
// RTDocument CapabilityViewer is identified in app.config. If one is
// found in app.config, and there is not already a default stored in
// the registry, then set this one as the default.
RegistryKey rtdocskey = Registry.CurrentUser.CreateSubKey("SOFTWARE\\Microsoft Research\\ConferenceXP\\Client\\" +
System.Reflection.Assembly.GetEntryAssembly().CodeBase + "\\CapabilityViewers");
string appconfigEntry;
if ((appconfigEntry = ConfigurationManager.AppSettings[AppConfig.CXP_RTDocumentViewerDefault]) != null)
{
// We only use the app.config setting if there is not already an entry marked as default
// in the registry
string[] names = rtdocskey.GetValueNames();
bool defExists = false;
foreach (string key in names)
{
object val = rtdocskey.GetValue(key);
if (val.ToString() == "default")
{
defExists = true;
break;
}
}
if (!defExists)
{
rtdocskey.SetValue(appconfigEntry, "default");
}
}
#endregion Default RTDocs viewer from app.config
// Get the directory of the executing .exe
DirectoryInfo diExe = new FileInfo(Assembly.GetExecutingAssembly().Location).Directory;
// Find all the DLLs in that directory, looping through them all
FileInfo[] fis = diExe.GetFiles("*.dll");
foreach (FileInfo fiDll in fis)
{
try
{
// Load each DLL into memory, getting a list of all root types (including classes and interfaces)
Type[] types = Assembly.LoadFrom(fiDll.FullName).GetTypes();
foreach (Type type in types)
{
// You can't instantiate an abstract class
if (type.IsAbstract)
{
continue;
}
// If the class defines "IsRunable" (inherited through Capability), run it and check
// that this class can be run on the current machine. If not, skip the class.
if (type.IsSubclassOf(typeof(MSR.LST.ConferenceXP.Capability)))
{
PropertyInfo runableProp = type.GetProperty("IsRunable", BindingFlags.Static | BindingFlags.Public);
if (runableProp != null) // if the dll was compiled off of old code, it won't have "IsRunable"
{
MethodInfo getRunableMethod = runableProp.GetGetMethod();
object returnObj = getRunableMethod.Invoke(null, null);
if (!(returnObj is bool) || (((bool)returnObj) == false))
{
continue; // Skip this type becuase its own method says it isn't runable.
}
}
}
// Check required capability attributes
Type iCV = type.GetInterface("MSR.LST.ConferenceXP.ICapabilityViewer");
Type iCS = type.GetInterface("MSR.LST.ConferenceXP.ICapabilitySender");
Capability.PayloadTypeAttribute pt = null;
Capability.NameAttribute capabilityName = null;
if (iCV != null || iCS != null)
{
pt = (Capability.PayloadTypeAttribute)Attribute.GetCustomAttribute(type,
typeof(Capability.PayloadTypeAttribute));
capabilityName = (Capability.NameAttribute)Attribute.GetCustomAttribute(type,
typeof(Capability.NameAttribute));
// Without a payload type and a name, it is invalidly constructed
if (null == pt || null == capabilityName)
{
continue;
}
}
// Does it have an ICapabilityViewer interface?
if (iCV != null)
{
AddCapabilityViewerClass(fiDll.Name, type, capabilityName.Name,
capabilityViewerClasses, pt, rtdocskey);
}
// Does it have an ICapabilitySender interface?
if (iCS != null)
{
AddCapabilitySenderClass(fiDll.Name, type, capabilityName.Name,
capabilitySenderClasses);
}
} // end foreach tBaseType
}
// Some DLLs in the directory may not be .NET Assemblies (like msvcrt70.dll), and they will throw a BadImageFormatException here if not.
catch (BadImageFormatException) {}
// Perhaps a bad or old .Net Dll is here, ignore it. This was firing for Shockwave Flash COM interop assemblies
catch (TypeInitializationException) {}
// Trying to reload an already loaded Dll, occurs for Conference.Dll, so just continue on...
catch (ReflectionTypeLoadException) {}
}
rtdocskey.Flush();
}
private void ObjectReceived(object capability, ObjectReceivedEventArgs ea)
{
if (ea.Data is FileObject)
{
FileObject fileObject = ea.Data as FileObject;
FileInfo fileInfo = new FileInfo(fileObject.Name);
Type tCapability = null;
ItemReceivedDialog dlgFileReceived = null;
if (tCapability != null)
{
Capability.NameAttribute attrName = (Capability.NameAttribute)
Attribute.GetCustomAttribute(tCapability, typeof(Capability.NameAttribute));
Capability.PayloadTypeAttribute attrPT = (Capability.PayloadTypeAttribute)
Attribute.GetCustomAttribute(tCapability, typeof(Capability.PayloadTypeAttribute));
dlgFileReceived = new ItemReceivedDialog(Strings.CapabilityReceived,
Strings.UserSentYouCapability);
dlgFileReceived.Button1Label = Strings.InstallHotkey;
dlgFileReceived.FileIconTip = string.Format(CultureInfo.CurrentCulture,
Strings.CapabilityNamePayloadType, attrName.Name, attrPT.PayloadType.ToString());
}
else
{
dlgFileReceived = new ItemReceivedDialog(Strings.FileReceived, Strings.UserSentYouFile);
}
dlgFileReceived.Image = Image.FromStream(
System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("MSR.LST.ConferenceXP.Images.FileReceived.gif"));
dlgFileReceived.From = ea.Participant.Name;
dlgFileReceived.Avatar = ea.Participant.Icon;
dlgFileReceived.AvatarTip = Strings.AvatarTipText;
dlgFileReceived.File = fileInfo.Name;
dlgFileReceived.FileIcon = fileObject.Icon;
dlgFileReceived.FileIconTip += string.Format(CultureInfo.CurrentCulture, Strings.FileSize,
((double)fileObject.Data.Length / 1024.0).ToString("#,#.00", CultureInfo.CurrentCulture));
dlgFileReceived.Time = DateTime.Now.ToString("h:mm:ss tt", CultureInfo.CurrentCulture);
if (dlgFileReceived.ShowDialog() != DialogResult.OK)
{
return;
}
if (tCapability != null)
{
RtlAwareMessageBox.Show(this, Strings.NotYetImplemented, string.Empty, MessageBoxButtons.OK,
MessageBoxIcon.None, MessageBoxDefaultButton.Button1, (MessageBoxOptions)0);
}
else
{
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.FileName = fileInfo.Name;
if (Directory.Exists(fileInfo.DirectoryName))
{
saveDialog.InitialDirectory = fileInfo.DirectoryName;
}
saveDialog.Filter = "All files (*.*)|*.*";
saveDialog.CheckPathExists = true;
saveDialog.OverwritePrompt = true;
saveDialog.RestoreDirectory = true;
if (saveDialog.ShowDialog() != DialogResult.OK)
{
return;
}
FileStream fileStream = File.OpenWrite(saveDialog.FileName);
fileStream.Write(fileObject.Data, 0, fileObject.Data.Length);
fileStream.Close();
}
}
}
private void ObjectReceived(object capability, ObjectReceivedEventArgs ea)
{
if (ea.Data is FileObject)
{
FileObject fileObject = ea.Data as FileObject;
FileInfo fileInfo = new FileInfo(fileObject.Name);
Type tCapability = null;
// if (fileInfo.Extension.ToLower() == ".dll")
// tCapability = GetCapability(fileObject.Data);
ItemReceivedDialog dlgFileReceived = null;
if (tCapability != null)
{
Capability.NameAttribute attrName = (Capability.NameAttribute)
Attribute.GetCustomAttribute(tCapability, typeof(Capability.NameAttribute));
Capability.PayloadTypeAttribute attrPT = (Capability.PayloadTypeAttribute)
Attribute.GetCustomAttribute(tCapability, typeof(Capability.PayloadTypeAttribute));
dlgFileReceived = new ItemReceivedDialog("Capability received", "A user has just sent you a capability");
dlgFileReceived.Button1Label = "&Install";
dlgFileReceived.FileIconTip = "Capability name: " + attrName.Name + Environment.NewLine +
"Payload type: " + attrPT.PayloadType.ToString() + Environment.NewLine;
}
else
{
dlgFileReceived = new ItemReceivedDialog("File received", "A user has just sent you a file");
}
dlgFileReceived.Image = Image.FromStream(
System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("MSR.LST.ConferenceXP.Images.FileReceived.gif"));
dlgFileReceived.From = ea.Participant.Name;
dlgFileReceived.Avatar = ea.Participant.Icon;
dlgFileReceived.AvatarTip = "IP: " + ea.Participant.RtpParticipant.IPAddress.ToString() + Environment.NewLine +
"Id: " + ea.Participant.Identifier + Environment.NewLine +
"Email: " + ea.Participant.Email + Environment.NewLine +
"Phone: " + ea.Participant.Phone;
dlgFileReceived.File = fileInfo.Name;
dlgFileReceived.FileIcon = fileObject.Icon;
dlgFileReceived.FileIconTip += "File size: " + ((double)fileObject.Data.Length / 1024.0).ToString("#,#.00") + " KB";
dlgFileReceived.Time = DateTime.Now.ToString("h:mm:ss tt");
if (dlgFileReceived.ShowDialog() != DialogResult.OK)
{
return;
}
if (tCapability != null)
{
MessageBox.Show("Not yet implemented");
}
else
{
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.FileName = fileInfo.Name;
if (Directory.Exists(fileInfo.DirectoryName))
{
saveDialog.InitialDirectory = fileInfo.DirectoryName;
}
saveDialog.Filter = "All files (*.*)|*.*";
saveDialog.CheckPathExists = true;
saveDialog.OverwritePrompt = true;
saveDialog.RestoreDirectory = true;
if (saveDialog.ShowDialog() != DialogResult.OK)
{
return;
}
FileStream fileStream = File.OpenWrite(saveDialog.FileName);
fileStream.Write(fileObject.Data, 0, fileObject.Data.Length);
fileStream.Close();
}
}
}