public Server(int webservicePort, string imageLocation, Action<NameValueCollection> checkAccess, Func<NameValueCollection, Hashtable> doParseResult)
{
this.doParseResult = doParseResult;
this.imageLocation = imageLocation;
this.checkAccess = checkAccess;
try
{
if (!HttpListener.IsSupported)
{
Logging.Write("HttpListener not supported.");
return;
}
web = new HttpServer(20);
web.ProcessRequest += OnRequest;
web.Start(webservicePort);
Logging.Write(string.Format("Spawning new webserver on http://localhost:{0}.", webservicePort));
}
catch (Exception e)
{
Logging.Write(string.Format("Error {0} stack: {1}", e.Message, e.StackTrace));
}
}
public void Dispose()
{
web.Stop();
web = null;
}
public void OnRequest(HttpListenerContext ctx)
{
string result = "";
byte[] buffer;
HttpListenerResponse response = ctx.Response;
// Check access..
try
{
checkAccess(ctx.Request.QueryString);
}
catch (Exception e)
{
response.ContentType = "application/json";
response.StatusCode = 400;
Hashtable data = new Hashtable();
data["ok"] = false;
data["error"] = e.Message;
data["result"] = new Hashtable();
Logging.Write(string.Format("Error {0} stack: {1}", e.Message, e.StackTrace));
result = JSON.JsonEncode(data);
HttpServer.SendResponse(response, result);
return;
}
// Image
string img = ctx.Request.QueryString.Get("img");
if (img != null)
{
response.StatusCode = 200;
img = imageLocation + img;
response.ContentType = "image/jpeg";
buffer = System.IO.File.ReadAllBytes(img);
HttpServer.SendResponse(response, buffer);
return;
}
// Json
response.ContentType = "application/json";
response.ContentEncoding = Encoding.UTF8;
try
{
Hashtable res = doParseResult(ctx.Request.QueryString);
if (res != null)
{
res["ok"] = true;
}
result = JSON.JsonEncode(res);
if (res != null && result != null)
{
response.StatusCode = 200;
}
else
{
throw new Exception("Request is invalid.");
}
}
catch (Exception e)
{
response.StatusCode = 400;
Hashtable data = new Hashtable();
data["ok"] = false;
data["error"] = e.Message;
data["result"] = new Hashtable();
result = JSON.JsonEncode(data);
}
// Support JSONP.
string callback = ctx.Request.QueryString.Get("callback");
if (callback != null)
{
result = callback + "(" + result + ")";
response.ContentType = "application/javascript";
response.StatusCode = 200; // jsonp must have 200 code :(
}
HttpServer.SendResponse(response, result);
}
public void Dispose()
{
web.Stop();
web = null;
}