Problem with rendering list RSS feed in iPhone Safari

Question

When I retrieve the RSS data from SharePoint On Premise ,

when display at company laptop its work, but display at iPhone Safari its can't retrieve the data.

I had try different method, but at the end can't display the result.

Here with my source code.

string url = string.Format("{0}?List={1}", SPUrlUtility.CombineUrl(web.Url, "_layouts/15/listfeed.aspx"), list.ID);
    var request = (HttpWebRequest)WebRequest.Create(url);
    request.Credentials = CredentialCache.DefaultNetworkCredentials;
    var response = (HttpWebResponse)request.GetResponse();
    if (response.StatusCode == HttpStatusCode.OK)
    {
        using (var stream = response.GetResponseStream())
        {
            using (var reader = new StreamReader(stream))
            {
                result = reader.ReadToEnd();
            }
        }
        result = Regex.Replace(result, @"<enclosure.+?/>", string.Empty);
    }

The problems is happen at request.Credentials = CredentialCache.DefaultCredentials;,
any suggestion for authentication method, not the Network Credential method,
because its does not secure by using Network Credential.

Method I had use:

1. CredentialCache.DefaultNetworkCredentials; - the status code "OK" but not display the result
2. CredentialCache.DefaultCredentials; - the status code "OK" but not display the result
3. NetworkCredential - this method not allowed in development & Production.

Answer 1

The phone cannot add domains, so DefaultCredentials does not work, usually we can only use System.Net.NetworkCredential to get Credentials on the phone.

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