Session values lost in an ASP.NET application
I created HttpHandler class in ASP.NET and configured a website to handle any request with the *.test path.
public class GameHandler : IHttpHandler, IRequiresSessionState
{
public bool IsReusable
{
get
{
return false;
}
}
public void ProcessRequest (HttpContext context)
{
if (context.Request.ContentType == "application/json; charset=utf-8")
{
...
switch (parameters ["type"])
{
case "Setup":
result = Setup (context);
break;
case "DoStep":
result = DoStep (context, parameters);
break;
}
...
}
else
context.Response.Write (@"
<html>
<head>
</head>
<body>
<!-- some HTML -->
</body>
</html>"); // this is returned on first request
}
In the Setup method I have such a code:
context.Session ["Game"] = new Game ();
In the DoStep method however, context.Session.Count = 0 and context.Session["Game"] is NULL. In client side I use jquery to call these functions. Such a call looks like this:
$.ajax({
url: "/test.test",
type: "POST",
data: "{'type':'Setup'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (开发者_开发知识库result) {...}
});
$.ajax({
url: "/test.test",
type: "POST",
data: "{'type':'DoStep','row':'" + row + "','column':'" + column + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (result) {...}
});
I suspect the problem is that ASP.NET doesn't know these requests sent from javascript belong to the same session and that's why the Session values are lost. I think that I would need to send back some cookie information or something for the next request to be identified but the fact is I don't have any idea.
Any help is really appreciated.
In case anyone encounters this problem I would like to specify that this happened because I use some file manipulation in the ProcessRequest method.
var doc = XDocument.Load (@"c:\XO_Game_Website\bin\test.xml");
if (context.Session ["something"] == null)
{
context.Session.Add("something", "something");
doc.Root.Element ("xxx").Value = "null";
}
else
{
doc.Root.Element ("xxx").Value = "not null";
}
doc.Save("path");
Once I removed the doc.Save("path"); from the method, everything just worked fine. Nonetheless I can't figure out why on earth would the file manipulation code reset the session values.
Happy coding.
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