void OnContext(IAsyncResult ar)
{
try {
var ctx = listener.EndGetContext(ar);
var path = ctx.Request.Url.LocalPath;
System.Console.WriteLine("{0} {1}", ctx.Request.HttpMethod, path);
if (ctx.Request.HttpMethod == "GET")
{
if (path == "/work")
{
var idx = rand.Next() % work.Count;
var w = work[idx];
if (w.Finished || w.HandedOut)
{
w = (from ww in work where !ww.Finished && !ww.HandedOut select ww).FirstOrDefault();
}
if (w != null)
{
w.Finished = false;
w.HandedOut = true;
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "text/xml";
w.Save(ctx.Response.OutputStream);
ctx.Response.Close();
}
else
{
ctx.Response.StatusCode = 404;
ctx.Response.Close();
}
}
else if (path == "/img" || path == "/favicon.ico")
{
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "image/png";
finalBuffer.SavePng(ctx.Response.OutputStream);
ctx.Response.Close();
}
else if (path == "/")
{
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "text/html";
using (var w = new StreamWriter(ctx.Response.OutputStream, Encoding.UTF8)) {
w.WriteLine("<!DOCTYPE html>");
w.WriteLine("<html><head><title>Frank's Distributed Raytracer</title>");
w.WriteLine("</head><body style='font-family:sans-serif;'>");
w.WriteLine("<h1>Frank's Distributed Raytracer</h1>");
w.WriteLine("<img src='/img' style='max-width:640px'>");
w.WriteLine("<h2>Progress</h2>");
var numFini = (from ww in work where ww.Finished select ww).Count();
var p = (numFini * 100) / work.Count;
w.WriteLine("<p><strong>{0} of {1}</strong> blocks complete ({2}%)</p>", numFini, work.Count, p);
var mins = 0.0;
var pps = 0.0;
var t = DateTime.UtcNow;
if (firstBlockTime.HasValue)
{
var dt = t - firstBlockTime.Value;
pps = (numFini - 1) * work[0].Width * work[0].Height / dt.TotalSeconds;
var tt = (dt.TotalMinutes * 100) / p;
mins = tt - dt.TotalMinutes;
}
w.WriteLine("<p><strong>{0}</strong> mins remaining ({1})</p>", (int)(mins + 0.5), DateTime.Now.AddMinutes(mins));
w.WriteLine("<p><strong>{0}</strong> pixels / sec</p>", (int)pps);
w.WriteLine("<h2>Scene</h2>");
w.WriteLine("<code><pre>");
w.WriteLine(HtmlEscape(scene.SaveXml()));
w.WriteLine("</pre></code>");
w.WriteLine("</body></html>");
}
ctx.Response.Close();
}
else
{
ctx.Response.StatusCode = 404;
ctx.Response.Close();
}
}
else
{
if (path.StartsWith("/work/") && path.EndsWith("/pixels"))
{
var wid = int.Parse(path.Split('/')[2]);
var w = work[wid];
var pb = PixelBuffer.OpenBinary(ctx.Request.InputStream);
finalBuffer.SetPixels(w.X, w.Y, pb);
w.Finished = true;
if (!firstBlockTime.HasValue)
{
firstBlockTime = DateTime.UtcNow;
}
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "text/plain";
ctx.Response.Close();
}
else
{
ctx.Response.StatusCode = 404;
ctx.Response.Close();
}
}
}
catch (Exception ex) {
System.Console.WriteLine("!! {0}: {1}", ex.GetType().Name, ex.Message);
throw;
}
finally {
listener.BeginGetContext(OnContext, null);
}
}
