public Yield Invoke(Plug plug, string verb, XUri uri, DreamMessage request, Result <DreamMessage> response)
{
// we only support GET as verb
DreamMessage reply;
if ((verb != Verb.GET) && (verb != Verb.HEAD))
{
reply = new DreamMessage(DreamStatus.MethodNotAllowed, null, null);
reply.Headers.Allow = Verb.GET + "," + Verb.HEAD;
}
else
{
bool head = (verb == Verb.HEAD);
// try to load the assembly
System.Reflection.Assembly assembly = System.Reflection.Assembly.Load(uri.Host);
Version version = assembly.GetName().Version;
DateTime timestamp = new DateTime(2000, 1, 1).AddDays(version.Build).AddSeconds(version.Revision * 2);
// check if request is just about re-validation
if (!head && request.CheckCacheRevalidation(timestamp))
{
reply = DreamMessage.NotModified();
}
else
{
try {
System.IO.Stream stream = assembly.GetManifestResourceStream(uri.Path.Substring(1));
if (stream != null)
{
MimeType mime = MimeType.New(uri.GetParam(DreamOutParam.TYPE, null)) ?? MimeType.BINARY;
reply = new DreamMessage(DreamStatus.Ok, null, mime, stream.Length, head ? System.IO.Stream.Null : stream);
if (head)
{
stream.Close();
}
else
{
reply.SetCacheMustRevalidate(timestamp);
}
}
else
{
reply = DreamMessage.NotFound("could not find resource");
}
} catch (System.IO.FileNotFoundException) {
reply = DreamMessage.NotFound("could not find resource");
} catch (Exception e) {
reply = DreamMessage.InternalError(e);
}
}
}
response.Return(reply);
yield break;
}