public static Session Load (FileSystemDatabase fsd, int key)
{
var toLoad = fsd.Read (key);
if (toLoad == null) {
return null;
}
var result = new Session ();
result.Id = key;
if (toLoad.ContainsKey (ShovelVmStateName)) {
result.ShovelVmState = toLoad [ShovelVmStateName];
}
if (toLoad.ContainsKey (ShovelVmBytecodeName)) {
result.ShovelVmBytecode = toLoad [ShovelVmBytecodeName];
}
if (toLoad.ContainsKey (ShovelVmSourcesName)) {
result.ShovelVmSources = Encoding.UTF8.GetString (toLoad [ShovelVmSourcesName]);
}
if (toLoad.ContainsKey (PageContentName)) {
result.PageContent.Append (Encoding.UTF8.GetString (toLoad [PageContentName]));
}
if (toLoad.ContainsKey (ReadStateName)) {
result.ReadState = (ReadStates)BitConverter.ToInt32 (toLoad [ReadStateName], 0);
}
return result;
}
public static void Main(string[] args)
{
if (!HttpListener.IsSupported) {
Console.WriteLine ("HttpListener not available.");
Environment.Exit (-1);
}
var bytecode = ProgramBytecode ();
if (bytecode == null) {
Environment.Exit (-1);
}
HttpListener hl = new HttpListener ();
hl.Prefixes.Add ("http://localhost:8080/");
hl.Start ();
var requestNo = 1;
var fsd = new FileSystemDatabase ("db");
while (hl.IsListening) {
var ctx = hl.GetContext ();
Console.WriteLine ("Serving a request ({0} {1}).", requestNo, ctx.Request.Url.AbsolutePath);
if (ctx.Request.Url.AbsolutePath == "/") {
ServeGuessNumberRequest (ctx, fsd);
} else {
ctx.Response.OutputStream.Close ();
}
Console.WriteLine ("Served a request ({0}).", requestNo);
requestNo++;
}
}
public static Session Load(FileSystemDatabase fsd, int key)
{
var toLoad = fsd.Read(key);
if (toLoad == null)
{
return(null);
}
var result = new Session();
result.Id = key;
if (toLoad.ContainsKey(ShovelVmStateName))
{
result.ShovelVmState = toLoad [ShovelVmStateName];
}
if (toLoad.ContainsKey(ShovelVmBytecodeName))
{
result.ShovelVmBytecode = toLoad [ShovelVmBytecodeName];
}
if (toLoad.ContainsKey(ShovelVmSourcesName))
{
result.ShovelVmSources = Encoding.UTF8.GetString(toLoad [ShovelVmSourcesName]);
}
if (toLoad.ContainsKey(PageContentName))
{
result.PageContent.Append(Encoding.UTF8.GetString(toLoad [PageContentName]));
}
if (toLoad.ContainsKey(ReadStateName))
{
result.ReadState = (ReadStates)BitConverter.ToInt32(toLoad [ReadStateName], 0);
}
return(result);
}
static Session FreshSession(FileSystemDatabase fsd)
{
var session = new Session ();
session.Id = fsd.GetFreshId ();
session.ShovelVmSources = Program ();
session.ShovelVmBytecode = Shovel.Api.SerializeBytecode (ProgramBytecode ());
return session;
}
static Session FreshSession(FileSystemDatabase fsd)
{
var session = new Session();
session.Id = fsd.GetFreshId();
session.ShovelVmSources = Program();
session.ShovelVmBytecode = Shovel.Api.SerializeBytecode(ProgramBytecode());
return(session);
}
public void Save(FileSystemDatabase fsd)
{
var toSave = new Dictionary <string, byte[]> ();
toSave [ShovelVmStateName] = this.ShovelVmState;
toSave [ShovelVmBytecodeName] = this.ShovelVmBytecode;
toSave [PageContentName] = Encoding.UTF8.GetBytes(this.PageContent.ToString());
toSave [ReadStateName] = BitConverter.GetBytes((int)this.ReadState);
toSave [ShovelVmSourcesName] = Encoding.UTF8.GetBytes(this.ShovelVmSources);
fsd.Write(this.Id, toSave);
}
private static void ServeGuessNumberRequest(HttpListenerContext ctx, FileSystemDatabase fsd)
{
ctx.Response.ContentType = "text/html";
var userInput = ctx.Request.QueryString ["input"];
int sessionId = 0;
var sessionIdStr = ctx.Request.QueryString ["sessionid"];
int.TryParse(sessionIdStr, out sessionId);
Session session = null;
if (sessionId != 0)
{
session = Session.Load(fsd, sessionId);
}
if (session == null)
{
session = FreshSession(fsd);
}
var vm = Shovel.Api.RunVm(
Shovel.Api.DeserializeBytecode(session.ShovelVmBytecode),
ProgramSources(Program()),
Udps(session, userInput),
session.ShovelVmState);
if (Shovel.Api.VmExecutionComplete(vm))
{
ctx.Response.Redirect("/");
}
else
{
session.ShovelVmState = Shovel.Api.SerializeVmState(vm);
// FIXME: Uncomment the next statement to fix the 'back button bug'.
//session.Id = fsd.GetFreshId ();
session.Save(fsd);
using (var sw = new StreamWriter(ctx.Response.OutputStream)) {
sw.Write("<!DOCTYPE html>\n");
sw.Write(session.PageContent.ToString());
sw.Write("<form action='/' method='get'>");
sw.Write("<input type='text' name='input' id='shovel-input'/>");
sw.Write("<input type='submit' value='Submit'/>");
sw.Write(String.Format(
"<input type='hidden' name='sessionid' value='{0}' id='shovel-input'/>", session.Id));
sw.Write("</form>");
sw.Write("<script>\n");
sw.Write("document.getElementById('shovel-input').focus()\n");
sw.Write("</script>\n");
}
}
ctx.Response.OutputStream.Close();
}
public static void Main(string[] args)
{
if (!HttpListener.IsSupported)
{
Console.WriteLine("HttpListener not available.");
Environment.Exit(-1);
}
var bytecode = ProgramBytecode();
if (bytecode == null)
{
Environment.Exit(-1);
}
HttpListener hl = new HttpListener();
hl.Prefixes.Add("http://localhost:8080/");
hl.Start();
var requestNo = 1;
var fsd = new FileSystemDatabase("db");
while (hl.IsListening)
{
var ctx = hl.GetContext();
Console.WriteLine("Serving a request ({0} {1}).", requestNo, ctx.Request.Url.AbsolutePath);
if (ctx.Request.Url.AbsolutePath == "/")
{
ServeGuessNumberRequest(ctx, fsd);
}
else
{
ctx.Response.OutputStream.Close();
}
Console.WriteLine("Served a request ({0}).", requestNo);
requestNo++;
}
}
private static void ServeGuessNumberRequest(HttpListenerContext ctx, FileSystemDatabase fsd)
{
ctx.Response.ContentType = "text/html";
var userInput = ctx.Request.QueryString ["input"];
int sessionId = 0;
var sessionIdStr = ctx.Request.QueryString ["sessionid"];
int.TryParse (sessionIdStr, out sessionId);
Session session = null;
if (sessionId != 0) {
session = Session.Load (fsd, sessionId);
}
if (session == null) {
session = FreshSession (fsd);
}
var vm = Shovel.Api.RunVm (
Shovel.Api.DeserializeBytecode (session.ShovelVmBytecode),
ProgramSources (Program ()),
Udps (session, userInput),
session.ShovelVmState);
if (Shovel.Api.VmExecutionComplete (vm)) {
ctx.Response.Redirect ("/");
} else {
session.ShovelVmState = Shovel.Api.SerializeVmState (vm);
// FIXME: Uncomment the next statement to fix the 'back button bug'.
//session.Id = fsd.GetFreshId ();
session.Save (fsd);
using (var sw = new StreamWriter(ctx.Response.OutputStream)) {
sw.Write ("<!DOCTYPE html>\n");
sw.Write (session.PageContent.ToString ());
sw.Write ("<form action='/' method='get'>");
sw.Write ("<input type='text' name='input' id='shovel-input'/>");
sw.Write ("<input type='submit' value='Submit'/>");
sw.Write (String.Format (
"<input type='hidden' name='sessionid' value='{0}' id='shovel-input'/>", session.Id));
sw.Write ("</form>");
sw.Write ("<script>\n");
sw.Write ("document.getElementById('shovel-input').focus()\n");
sw.Write ("</script>\n");
}
}
ctx.Response.OutputStream.Close ();
}
public void Save (FileSystemDatabase fsd)
{
var toSave = new Dictionary<string, byte[]> ();
toSave [ShovelVmStateName] = this.ShovelVmState;
toSave [ShovelVmBytecodeName] = this.ShovelVmBytecode;
toSave [PageContentName] = Encoding.UTF8.GetBytes (this.PageContent.ToString ());
toSave [ReadStateName] = BitConverter.GetBytes ((int)this.ReadState);
toSave [ShovelVmSourcesName] = Encoding.UTF8.GetBytes (this.ShovelVmSources);
fsd.Write (this.Id, toSave);
}