/// <summary>
/// Executes the GET method on the resource.
/// </summary>
/// <param name="Request">CoAP Request</param>
/// <param name="Response">CoAP Response</param>
/// <exception cref="CoapException">If an error occurred when processing the method.</exception>
public void GET(CoapMessage Request, CoapResponse Response)
{
StringBuilder sb = new StringBuilder();
CoapResource[] Resources = this.endpoint.GetResources();
LinkedList <KeyValuePair <string, string> > Filter = null;
bool First = true;
string s;
int i, c;
bool Include;
foreach (CoapOption Option in Request.Options)
{
if (Option is CoapOptionUriQuery Query)
{
if (Filter is null)
{
Filter = new LinkedList <KeyValuePair <string, string> >();
}
Filter.AddLast(new KeyValuePair <string, string>(Query.Key, Query.KeyValue));
}
}
foreach (CoapResource Resource in Resources)
{
if (!Resource.WellKnownCoRE)
{
continue;
}
if (Filter != null)
{
Include = true;
foreach (KeyValuePair <string, string> Rec in Filter)
{
switch (Rec.Key)
{
case "href":
Include = this.Matches(Rec.Value, Resource.Path);
break;
case "rt":
Include = this.Matches(Rec.Value, Resource.ResourceTypes);
break;
case "if":
Include = this.Matches(Rec.Value, Resource.InterfaceDescriptions);
break;
case "ct":
Include = this.Matches(Rec.Value, Resource.ContentFormats);
break;
case "obs":
Include = Resource.Observable;
break;
case "title":
Include = this.Matches(Rec.Value, Resource.Title);
break;
case "sz":
if (!Resource.MaximumSizeEstimate.HasValue)
{
Include = false;
}
else
{
Include = this.Matches(Rec.Value, Resource.MaximumSizeEstimate.Value.ToString());
}
break;
default:
Include = false;
break;
}
}
if (!Include)
{
continue;
}
}
if (First)
{
First = false;
}
else
{
sb.Append(',');
}
sb.Append('<');
sb.Append(Resource.Path);
sb.Append('>');
if (Resource.Observable)
{
sb.Append(";obs");
}
if (!string.IsNullOrEmpty(s = Resource.Title))
{
sb.Append(";title=\"");
sb.Append(s.Replace("\"", "\\\""));
sb.Append("\"");
}
this.Append(sb, "rt", Resource.ResourceTypes);
this.Append(sb, "if", Resource.InterfaceDescriptions);
int[] ContentFormats = Resource.ContentFormats;
if (ContentFormats != null && (c = ContentFormats.Length) > 0)
{
sb.Append(";ct=\"");
for (i = 0; i < c; i++)
{
if (i > 0)
{
sb.Append(' ');
}
sb.Append(ContentFormats[i].ToString());
}
sb.Append('"');
}
if (Resource.MaximumSizeEstimate.HasValue)
{
sb.Append(";sz=");
sb.Append(Resource.MaximumSizeEstimate.Value.ToString());
}
}
Response.Respond(CoapCode.Content, Encoding.UTF8.GetBytes(sb.ToString()),
64, new CoapOptionContentFormat(CoreLinkFormat.ContentFormatCode));
}