You can use HostingEnvironment.MapPath instead of HttpContext.MapPath.
SignalR HttpContext.Current null in IIS 8.0
Pergunta
I modified the Broadcast Sample from SignalR website documentation, instead of random values, I read random xml files. I'm using the HttpContext.Current.Server.MapPath
method to access the files and avoid hardcoding the physical path. This runs fine in Windows 7 IIS 7.5 and within Visual Studio 2013, but in Windows 8.1 and Windows Server 2012 I found out that HttpContext.Current
is null
. Before asking I searched other questions but didn't found anything like what's happening here.
Here is the whole class code:
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Threading;
using Microsoft.AspNet.SignalR;
using Microsoft.AspNet.SignalR.Hubs;
namespace SignalRDisplayXML
{
public struct ReturnDataScheme
{
public List<VsDisplaySlotBean> slotsdata;
public string filename;
}
public class XmlTicker
{
private readonly static Lazy<XmlTicker> _instance =
new Lazy<XmlTicker>(() => new XmlTicker(GlobalHost.ConnectionManager.GetHubContext<DisplayXMLHub>().Clients, HttpContext.Current.Server.MapPath("~/Data/")));
private DAO _dao = new DAO();
private ReturnDataScheme _server_data = new ReturnDataScheme();
private string _directoryPath = string.Empty;
private readonly object _processRandomXMLLock = new object();
private volatile bool _updatingRandomXML = false;
private readonly Timer _timer;
private XmlTicker(IHubConnectionContext clients, string path)
{
Clients = clients;
_directoryPath = path;
_server_data.filename = GetRandomFileName();
_server_data.slotsdata = _dao.GetVesselAll(_server_data.filename);
_timer = new Timer(ProcessRandomXML, null, 10000, 10000);
}
public static XmlTicker Instance
{
get
{
return _instance.Value;
}
}
private IHubConnectionContext Clients
{
get;
set;
}
public ReturnDataScheme GetCurrentData()
{
return _server_data;
}
private void ProcessRandomXML(object state)
{
lock (_processRandomXMLLock)
{
if (!_updatingRandomXML)
{
_updatingRandomXML = true;
_server_data.filename = GetRandomFileName();
_server_data.slotsdata = _dao.GetVesselAll(_server_data.filename);
Clients.All.DataPush(_server_data);
_updatingRandomXML = false;
}
}
}
private string GetRandomFileName()
{
Random randomizer = new Random(DateTime.Now.Millisecond);
return _directoryPath + "DisplaySlotFDMF00" + randomizer.Next(1, 9).ToString() + ".xml";
}
}
}
Thanks.
Solução
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