// for a permanent subscription, specify 0 for subscribeSeconds
public static HttpStatusCode Subscribe(string hubUrl, string callback,
string topic, PushVerifyType verify, int subscribeSeconds,
string verifyToken, string secret)
{
return InternalSubscribe(hubUrl, callback, topic,
PushSubscriberMode.Subscribe, verify, subscribeSeconds,
verifyToken, secret);
}
// for a permanent subscription, specify 0 for subscribeSeconds
public static HttpStatusCode Subscribe(string hubUrl, string callback,
string topic, PushVerifyType verify, int subscribeSeconds,
string verifyToken, string secret)
{
return(InternalSubscribe(hubUrl, callback, topic,
PushSubscriberMode.Subscribe, verify, subscribeSeconds,
verifyToken, secret));
}
private static HttpStatusCode InternalSubscribe(string hubUrl, string callback,
string topic, PushSubscriberMode mode, PushVerifyType verify,
int subscribeSeconds, string verifyToken, string secret)
{
Debug.WriteLine(string.Format("{0}: topic = {1}", mode, topic));
StringBuilder sb = new StringBuilder();
Action<string, string> AddParam = (key, value) =>
{
if (sb.Length != 0)
{
sb.Append('&');
}
sb.AppendFormat("{0}={1}", key, HttpUtility.UrlEncode(value));
};
AddParam("hub.callback", callback);
AddParam("hub.topic", topic);
AddParam("hub.mode", mode.ToString().ToLower());
AddParam("hub.verify", verify.ToString().ToLower());
if (subscribeSeconds > 0)
{
AddParam("hub.lease_seconds", subscribeSeconds.ToString());
}
if (!string.IsNullOrEmpty(verifyToken))
{
AddParam("hub.verify_token", verifyToken);
}
if (!string.IsNullOrEmpty(secret))
{
AddParam("hub.secret", secret);
}
byte[] postData = Encoding.UTF8.GetBytes(sb.ToString());
string subUrl = hubUrl + "/subscribe";
Debug.WriteLine(string.Format(" hub={0}\r\n params = {1}", subUrl, sb.ToString()));
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(subUrl);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postData.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(postData, 0, postData.Length);
requestStream.Flush();
requestStream.Close();
try
{
using (var response = (HttpWebResponse)request.GetResponse())
{
Debug.WriteLine(string.Format("Received response ({0}).", response.StatusCode));
return response.StatusCode;
}
}
catch (WebException wex)
{
Debug.WriteLine(string.Format("Exception getting response. Status = {0}", wex.Status));
Debug.Write(wex);
if (wex.Response != null)
{
HttpWebResponse resp = wex.Response as HttpWebResponse;
if (resp != null)
{
Debug.WriteLine(string.Format("Response status = {0}", resp.StatusCode));
return resp.StatusCode;
}
}
return HttpStatusCode.BadRequest;
}
}
public static HttpStatusCode Unsubscribe(string hubUrl, string callback,
string topic, PushVerifyType verify, string verifyToken)
{
return InternalSubscribe(hubUrl, callback, topic,
PushSubscriberMode.Unsubscribe, verify, -1, verifyToken, null);
}
private static HttpStatusCode InternalSubscribe(string hubUrl, string callback,
string topic, PushSubscriberMode mode, PushVerifyType verify,
int subscribeSeconds, string verifyToken, string secret)
{
Debug.WriteLine(string.Format("{0}: topic = {1}", mode, topic));
StringBuilder sb = new StringBuilder();
Action <string, string> AddParam = (key, value) =>
{
if (sb.Length != 0)
{
sb.Append('&');
}
sb.AppendFormat("{0}={1}", key, HttpUtility.UrlEncode(value));
};
AddParam("hub.callback", callback);
AddParam("hub.topic", topic);
AddParam("hub.mode", mode.ToString().ToLower());
AddParam("hub.verify", verify.ToString().ToLower());
if (subscribeSeconds > 0)
{
AddParam("hub.lease_seconds", subscribeSeconds.ToString());
}
if (!string.IsNullOrEmpty(verifyToken))
{
AddParam("hub.verify_token", verifyToken);
}
if (!string.IsNullOrEmpty(secret))
{
AddParam("hub.secret", secret);
}
byte[] postData = Encoding.UTF8.GetBytes(sb.ToString());
string subUrl = hubUrl + "/subscribe";
Debug.WriteLine(string.Format(" hub={0}\r\n params = {1}", subUrl, sb.ToString()));
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(subUrl);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postData.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(postData, 0, postData.Length);
requestStream.Flush();
requestStream.Close();
try
{
using (var response = (HttpWebResponse)request.GetResponse())
{
Debug.WriteLine(string.Format("Received response ({0}).", response.StatusCode));
return(response.StatusCode);
}
}
catch (WebException wex)
{
Debug.WriteLine(string.Format("Exception getting response. Status = {0}", wex.Status));
Debug.Write(wex);
if (wex.Response != null)
{
HttpWebResponse resp = wex.Response as HttpWebResponse;
if (resp != null)
{
Debug.WriteLine(string.Format("Response status = {0}", resp.StatusCode));
return(resp.StatusCode);
}
}
return(HttpStatusCode.BadRequest);
}
}
public static HttpStatusCode Unsubscribe(string hubUrl, string callback,
string topic, PushVerifyType verify, string verifyToken)
{
return(InternalSubscribe(hubUrl, callback, topic,
PushSubscriberMode.Unsubscribe, verify, -1, verifyToken, null));
}
