private void DisplayMessage(Message msg)
{
try
{
IList<Option> options = msg.GetOptions();
Boolean ifObserve = false;
string responseCoap;
responseCoap = "HTTP/1.1 200 OK\r\n";
responseCoap += "Content-Type: text/html; charset=UTF-8\r\n\r\n";
//Judge if the resouce can be Observed
foreach (Option o in options)
{
if (o.Type.Equals(OptionType.MaxAge))
{
ifObserve = true;
break;
}
}
//if can be Observed
if (ifObserve)
{
responseCoap += "<!DOCTYPE html PUBLIC \" -//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">"
+ "<html><head><title>Observe</title>"
+"<script type=\"text/javascript\"> var ws; function connectSocketServer() {"
+ "if (document.getElementById('btnSend').value == \"Observe\"){"
+ " document.getElementById('messageBoard').innerHTML = \"* Connecting to server ..<br/>\"; document.getElementById('btnSend').value =\"Cancel\";"
+ " ws = new WebSocket('ws://59.64.38.126:912');"
+ " var script_el=document.createElement(\"script\"); script_el.type=\"text/javascript\";"
+ " script_el.src=window.location.href + \"?observehost\";"
+ " document.getElementById('messageBoard').appendChild(script_el);"
+ " ws.onmessage = function (evt) { document.getElementById('messageBoard').innerHTML+=\"# \" + evt.data + \"<br />\"; };"
+ " ws.onopen = function () { document.getElementById('messageBoard').innerHTML +=\"* Connection open<br/>\";};"
+ " ws.onclose = function (){ document.getElementById('messageBoard').innerHTML += \"* Connection closed<br/>\"; };"
+ "} else{ window.location.reload(); }"
+ "}</script>"
+"</head><body><div id=\"messageBoard\">"
+ msg.PayloadString
+ "</div><br/><input type=\"button\" id=\"btnSend\" value=\"Observe\" onclick=\"connectSocketServer();\" /></body></html>";
}
else
{
responseCoap += msg.PayloadString;
}
Byte[] payloadBytes = msg.Payload;
if (MediaType.IsImage(msg.ContentType))
{
// show image
// doesn't work :(
//webBrowserPayload.DocumentStream = new MemoryStream(payloadBytes);
// save to a temp file
File.WriteAllBytes(_tempImagePath, payloadBytes);
String path = "file:///" + _tempImagePath.Replace('\\', '/');
responseCoap = String.Format("<html><head><title></title></head><body><img src=\"{0}\" alt=\"\"></body></html>", path);
}
byte[] bytes = Encoding.UTF8.GetBytes(responseCoap);
this.clientSocket.Send(bytes);
this.clientSocket.Disconnect(false);
this.clientSocket.Dispose();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
