Question

对于我的环境，我使用Rest API通过通知中心注册/取消注册我的设备。

每当我的用户登录时，我的应用程序向GCM注册，获取注册ID，然后向通知中心注册以接收通知。这没有任何问题。

当我的用户退出时，我的应用想要从通知中心删除该注册，以便用户不再收到任何通知。

咨询本页后如何删除注册

https://msdn.microsoft.com/en-us/library/azure/dn223268.aspx

我写了以下代码：

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);
}

但我总是收到这个错误：

（sendNHDeleteRegistrationRequest）NH删除注册不成功 register.js：230（sendNHDeleteRegistrationRequest）HTTP状态：405：方法不允许 register.js：231（sendNHDeleteRegistrationRequest）HTTP响应： 405指定的HTTP谓词（POST）无效.TrackingId：64cd952b-ffda-42f8-860b-22dd4aa397ea_G3，TimeStamp：7/31/2015 4:00:48 AM

所以我的问题是 1.要在用户退出时停止接收我的应用程序的通知，标准做法是什么？阻止通知在应用程序中触发或从通知中心删除注册？ 2.我是否以正确的方式使用此删除注册？为什么我不接收405方法？

谢谢！

Answer 1

为了删除注册，我使用下面的代码，它是我为ASP.NET .NET Core项目编写的C＃代码，但也许有帮助：

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; }
}

Answer 2

我看到你正在使用POST方法删除注册。你不应该使用DELETE吗？

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");

尝试：

client.open("DELETE", url, true);

Answer 3

我更喜欢使用ANH SDK来提供一种方法！

// go to the Acess Policies page to take your ConnectionString and Namespace
var hubClient = NotificationHubClient.CreateClientFromConnectionString("Your Connection String", "Your namespace");

// take the registrations using your FirebaseToken or Tags, for instance
var registrations = await hubClient.GetRegistrationsByChannelAsync(yourFirebaseToken, 100);

// Finally, remove them
foreach (var registration in registrations)
{
  await hubClient.DeleteRegistrationAsync(registration);
}

删除Azure通知中心中的注册

3 个答案: