Remove registration in Azure Notification Center
In my environment I am using Rest API to register / unregister my device with notification center.
Whenever my user logs in, my app registers with GCM, gets a registration ID, then registers with a notification center to receive a notification. This works without issue.
When my user is logged out, my application wants to remove this registration from the notification center so that the user no longer receives notifications.
After consulting this page on how to delete registration
https://msdn.microsoft.com/en-us/library/azure/dn223268.aspx
I wrote the following code:
var client = new XMLHttpRequest();
client.onload = function () {
if (client.readyState == 4) {
if (client.status == 200) {
// we are logged out
console.log("(sendNHDeleteRegistrationRequest) NH delete registration is successful");
chrome.storage.local.set({registered: false});
updateRegisterUI();
} else {
console.log("(sendNHDeleteRegistrationRequest) NH delete registration is not successful");
console.log("(sendNHDeleteRegistrationRequest) HTTP Status: " + client.status + " : " + client.statusText);
console.log("(sendNHDeleteRegistrationRequest) HTTP Response: " + "\n" + client.responseText);
}
}
};
var url = gOriginalUri + "/registrations/" + gRegistrationId + "?api-version=2015-01";
client.open("POST", url, true);
client.setRequestHeader("Content-Type", "application/atom+xml;type=entry;charset=utf-8");
client.setRequestHeader("Authorization", gSasToken);
client.setRequestHeader("x-ms-version", "2015-01");
try {
client.send();
chrome.storage.local.set({registered: false});
updateRegisterUI();
}
catch(err) {
console.log(err.message);
}
But I always get this error:
(sendNHDeleteRegistrationRequest) NH delete registration fails register.js: 230 (sendNHDeleteRegistrationRequest) HTTP status: 405: method not allowed register.js: 231 (sendNHDeleteRegistrationRequest) HTTP response: <code> 405 The specified HTTP verb (POST) is invalid. TrackingId: 64cd952b-ffda-42f8-860b-22dd4aa397ea_G3, TimeStamp: 07/31/2014 4:00:48 AM
so my question is 1. To stop receiving notifications for my app when a user logs out, what is the standard practice? Block the termination notice in the app or remove the registration from the notification center? 2. Am I using this registration correctly to delete? Why can't I accept 405 method?
thank!
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To remove the registration, I am using the following code, C # code I wrote for an ASP.NET.NET Core project, but maybe it helps:
const string hubName = "hubname";
const string apiVersion = "?api-version=2015-01";
const string fullSharedAccessKey = @"fullsharedaccesskey";
const string messageChannel = @"/messages";
const string registrationChannel = @"/registrations";
const string installationChannel = @"/installations";
public async Task<int> DeleteRegistration(string registrationId)
{
var accessKey = ToAccessKey(fullSharedAccessKey);
Uri uri = new Uri($"{accessKey.Endpoint}{hubName}{registrationChannel}/{registrationId}/{apiVersion}");
var sasToken = createToken(uri.AbsoluteUri, accessKey.SasKeyName, accessKey.SasKeyValue);
using (HttpClient client = new HttpClient())
{
HttpRequestMessage message = new HttpRequestMessage()
{
RequestUri = uri,
Method = HttpMethod.Delete
};
message.Headers.Add("Authorization", sasToken);
message.Headers.Add("If-Match", "*");
var result = await client.SendAsync(message);
}
return 0;
}
private AzureNotificationsAccessKey ToAccessKey(string connectionString)
{
var key = new AzureNotificationsAccessKey();
// Parse Connection string
char[] separator = { ';' };
string[] parts = connectionString.Split(separator);
for (int i = 0; i < parts.Length; i++)
{
if (parts[i].StartsWith("Endpoint"))
key.Endpoint = "https" + parts[i].Substring(11);
if (parts[i].StartsWith("SharedAccessKeyName"))
key.SasKeyName = parts[i].Substring(20);
if (parts[i].StartsWith("SharedAccessKey"))
key.SasKeyValue = parts[i].Substring(16);
}
return key;
}
/// <summary>
/// Code for generating of SAS token for authorization with Service Bus
///
/// This handy function can be found on this helpful blog post:
/// http://developers.de/blogs/damir_dobric/archive/2013/10/17/how-to-create-shared-access-signature-for-service-bus.aspx
/// </summary>
/// <param name="resourceUri"></param>
/// <param name="keyName"></param>
/// <param name="key"></param>
/// <returns></returns>
private string createToken(string resourceUri, string keyName, string key)
{
TimeSpan sinceEpoch = DateTime.UtcNow - new DateTime(1970, 1, 1);
var expiry = Convert.ToString((int)sinceEpoch.TotalSeconds + 3600); //EXPIRES in 1h
string stringToSign = EncodeUrl(resourceUri) + "\n" + expiry;
HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(key));
var signature = Convert.ToBase64String(hmac.ComputeHash(Encoding.UTF8.GetBytes(stringToSign)));
var sasToken = String.Format(CultureInfo.InvariantCulture,
"SharedAccessSignature sig={1}&se={2}&skn={3}&sr={0}",
EncodeUrl(resourceUri), EncodeUrl(signature), expiry, keyName);
return sasToken;
}
public class AzureNotificationsAccessKey
{
public string Endpoint { get; set; }
public string SasKeyName { get; set; }
public string SasKeyValue { get; set; }
}
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I see that you are using the POST method to remove the registration. Aren't you using DELETE instead?
var url = gOriginalUri + "/registrations/" + gRegistrationId + "?api-version=2015-01";
client.open("POST", url, true);
client.setRequestHeader("Content-Type", "application/atom+xml;type=entry;charset=utf-8");
client.setRequestHeader("Authorization", gSasToken);
client.setRequestHeader("x-ms-version", "2015-01");
Try:
client.open("DELETE", url, true);
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