private string GetHmac256(PusherRequest request)
{
var data = String.Format("POST\n{0}\n{1}", GetBaseUri(request), GetQueryString(request));
var hmacsha256 = new HMACSHA256(Encoding.UTF8.GetBytes(_applicationSecret));
var hash = hmacsha256.ComputeHash(Encoding.UTF8.GetBytes(data));
return BytesToHex(hash);
}
/// <summary>
/// Sends the request. Will throw a WebException if anything other than a 202 response is encountered
/// </summary>
/// <param name="request"></param>
public void Trigger(PusherRequest request)
{
var requestUrl = String.Format("http://{0}{1}?{2}&auth_signature={3}",
_host,
GetBaseUri(request),
GetQueryString(request),
GetHmac256(request));
using(var client = new WebClient())
{
client.Encoding = Encoding.UTF8;
client.UploadString(requestUrl, request.JsonData);
}
}
private string GetQueryString(PusherRequest request)
{
var output = String.Format("auth_key={0}&auth_timestamp={1}&auth_version=1.0&body_md5={2}&name={3}",
_applicationKey,
(int)((DateTime.UtcNow - new DateTime(1970,1,1)).TotalSeconds),
GetMd5Hash(request.JsonData),
request.EventName);
return String.IsNullOrEmpty(request.SocketId) ? output : String.Format("{0}&socket_id={1}", output, request.SocketId);
}
private string GetBaseUri(PusherRequest request)
{
return String.Format("/apps/{0}/channels/{1}/events", _applicationId, request.ChannelName);
}
