KeepAlive in C#

[Contrarian2]

Finally worked out how to log in and get a session token with API-NG.

Could someone show me how to use Keep Alive? Preferably with the HttpWebRequest class.

I tried this (adapting a login example given by someone on this forum):

string uri = string.Format("https://identitysso.betfair.com/api/keepAlive");
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);
req.Accept = "application/json";
req.Headers.Add("X-Authentication", sessionToken);
req.Method = "POST";
req.Timeout = 5000;

WebResponse resp = req.GetResponse();

But it doesn't seem to work.

Thanks.

[Contrarian2]

Or perhaps if someone could just tell me whether or not this address is correct:

https://identitysso.betfair.com/api/keepAlive

I assume it's wrong.

Thanks.

[Tipmanager1]

you should add the application key aswell in your request.

so something like this:
req.Headers.Add("X-Application", APPKEY);

[Contrarian2]

Thanks Tipmanager1 but it still doesn't work.

I think the application key is optional in keep alive requests.

[gus]

Dunno much about c#, but, looking at the code, I'd have thought that just in terms of consistency, if

req.Headers.Add("X-Authentication", sessionToken);

is the correct syntax, then

req.Accept = "application/json";

should be

req.Headers.Add("Accept", "application/json");

[Peter Simple]

req.Headers.Add("Accept", "application/json");

That will lead to an error in .net because "req.Accept" is already the "standart" header.

I have tested the "KeepAlive" function andt did not get an json message as return but also no error message. I did not care about it because it seems that a token lasts more than 20 minutes - at least now.

[Contrarian2]

Thanks Peter.

Could you show me the code that you used for KeepAlive?

It's a bit annoying, because I"m running bots using the API-NG, but I'm still having to manage the session using the old API, because I don't know how to keep it alive with the new one.

[davecon]

Hi Suppose you just need to do this But Why bother if your bot is surely going to make a market call at least once every 20 mins anyway?
Hope this helps anyway Dave

  Sub KeepAlive(SessToken As String, Optional AppKey As String = "")
        Dim Url As String = " https://identitysso.betfair.com/api/keepAlive"
        Dim request As WebRequest = Nothing
        Dim response As WebResponse = Nothing
        Dim strResponseStatus As String = ""
        Try
            request = WebRequest.Create(New Uri(Url))
            request.Method = "POST"
            request.ContentType = "application/json-rpc"
            request.Headers.Add(HttpRequestHeader.AcceptCharset, "ISO-8859-1,utf-8")
            request.Headers.Add("X-Authentication", SessToken)
            If AppKey <> "" Then
                request.Headers.Add("X-Application", AppKey)
            End If
            '~~> Get the response.
            response = request.GetResponse()
            '~~> Display the status below 
            strResponseStatus = "Status is " & CType(response, HttpWebResponse).StatusDescription
        Catch ex As Exception
            MsgBox("CreateRequest Error" & vbCrLf & ex.Message)
        End Try
        MsgBox(strResponseStatus)
        '~~~Clean Up
        response.Close()
    End Sub '

Or I used a Converter for C#

public void KeepAlive(string SessToken, string AppKey = "")
{
	string Url = " https://identitysso.betfair.com/api/keepAlive";
	WebRequest request = null;
	WebResponse response = null;
	string strResponseStatus = "";
	try {
		request = WebRequest.Create(new Uri(Url));
		request.Method = "POST";
		request.ContentType = "application/json-rpc";
		request.Headers.Add(HttpRequestHeader.AcceptCharset, "ISO-8859-1,utf-8");
		request.Headers.Add("X-Authentication", SessToken);
		if (!string.IsNullOrEmpty(AppKey)) {
			request.Headers.Add("X-Application", AppKey);
		}
		//~~> Get the response.
		response = request.GetResponse();
		//~~> Display the status below 
		strResponseStatus = "Status is " + ((HttpWebResponse)response).StatusDescription;
	} catch (Exception ex) {
		Interaction.MsgBox("CreateRequest Error" + Constants.vbCrLf + ex.Message);
	}
	Interaction.MsgBox(strResponseStatus);
	//~~~Clean Up
	response.Close();
}

[Contrarian2]

Thanks for that Dave. Works perfectly.

[chi]

Json keepAlive using http Client

1. Use System.Net.HttpWebRequest instead of System.Net.WebRequest. This class allows changing property relating to "Accept" parameter that is required by API-NG.

1. Use System.Io.StreamReader to get the response content.

C# code

public void KeepAlive2(string SessToken, string AppKey)
{
    string Url = "https://identitysso.betfair.com/api/keepAlive";
    [COLOR="SeaGreen"]System.Net.HttpWebRequest[/COLOR] request = null;
    [COLOR="SeaGreen"]System.Net.HttpWebResponse[/COLOR] response = null;
    string strResponseContent = "";
    try 
    {
        request = [COLOR="Green"]System.Net.HttpWebRequest[/COLOR].Create(new Uri(Url));
        request.Accept = "application/json"; [COLOR="Purple"]// Tells API-NG to respond in Json not Html[/COLOR]
        request.Method = "POST";
        request.Headers.Add(HttpRequestHeader.AcceptCharset, "ISO-8859-1,utf-8");
        request.Headers.Add("X-Authentication", SessToken);
        if (!string.IsNullOrEmpty(AppKey)) equest.Headers.Add("X-Application", AppKey);
        // Get the response using io stream
        using ([COLOR="Green"]System.Net.HttpWebResponse[/COLOR] wr = request.GetResponse())
        {
            using ([COLOR="Green"]System.Io.StreamReader[/COLOR] sr = new [COLOR="SeaGreen"]System.Io.StreamReader[/COLOR](wr.GetResponseStream()))
            {
                strResponseContent = sr.ReadToEnd().ToString;
                sr.Close();
            }
            wr.Close();
        }
        Console.WriteLine(strResponseContent); 
    } 
    catch (Exception ex) 
    {
        Console.WriteLine("Error: " + Environment.NewLine + ex.Message);
    }
    // Expect to print out {"token":"4bnwldH;gf+jemndUIjmndGbCc=","product":"Your Product ID","status":"SUCCESS","error":""}
}

VB code:

Public Sub KeepAlive2(SessToken As String, AppKey As String)
    Dim Url As String = "https://identitysso.betfair.com/api/keepAlive"
    Dim request As [COLOR="Green"]System.Net.HttpWebRequest[/COLOR] = Nothing
    Dim response As [COLOR="Green"]System.Net.HttpWebResponse[/COLOR] = Nothing
    Dim strResponseContent As String = ""
    Try
        request = [COLOR="SeaGreen"]System.Net.HttpWebRequest[/COLOR].Create(New Uri(Url))
        With request
            .Accept = "application/json" [COLOR="DarkRed"]' Tells API-NG to respond in Json not Html[/COLOR]
            .Method = "POST"
            .Headers.Add(HttpRequestHeader.AcceptCharset, "ISO-8859-1,utf-8")
            .Headers.Add("X-Authentication", SessToken)
            If Not String.IsNullOrEmpty(AppKey) Then .Headers.Add("X-Application", AppKey)
        End With
        ' Get response using io stream
        Using wr As [COLOR="Green"]System.Net.HttpWebResponse[/COLOR] = request.GetResponse()
            Using sr As New [COLOR="Green"]System.IO.StreamReader[/COLOR](wr.GetResponseStream())
                strResponseContent = sr.ReadToEnd().ToString
                sr.Close()
            End Using
            wr.Close()
        End Using
        Console.WriteLine(strResponseContent)
    Catch ex As Exception
        Console.WriteLine("Error: " + Environment.NewLine + ex.Message)
    End Try
    ' Expect to print out {"token":"4bnwldH;gf+jemndUIjmndGbCc=","product":"Your Product ID","status":"SUCCESS","error":""}
End Sub