/// <summary>
/// Creates a <see cref="TimeZoneResponse"/> from the given XML stream.
/// </summary>
/// <param name="stream">The stream to create the response from.</param>
/// <returns>The created response.</returns>
public static TimeZoneResponse FromXml(Stream stream)
{
TimeZoneResponse response = new TimeZoneResponse() { Status = TimeZoneCallStatus.Success };
XPathDocument doc = new XPathDocument(stream);
XPathNavigator nav = doc.CreateNavigator();
XPathNodeIterator iterator = nav.Select("//status");
if (iterator.MoveNext())
{
string status = iterator.Current.GetAttribute("value", String.Empty);
response.Status = (TimeZoneCallStatus)Enum.Parse(typeof(TimeZoneCallStatus), status);
if (!Enum.IsDefined(typeof(TimeZoneCallStatus), response.Status))
{
response.Status = TimeZoneCallStatus.Unknown;
}
}
if (response.Status == TimeZoneCallStatus.Success)
{
iterator = nav.Select("//timezoneId");
if (iterator.MoveNext())
{
response.TimeZone = iterator.Current.Value.Trim();
}
}
return response;
}
/// <summary>
/// Gets this instance's response asynchronously.
/// </summary>
/// <param name="callback">A method to be called when the operation completes.</param>
public void GetResponseAsync(Action<TimeZoneResponse> callback)
{
if (this.response == null)
{
WebRequest request = WebRequest.Create(this.RequestUri);
request.BeginGetResponse(
delegate(IAsyncResult result)
{
this.response = CreateResponse((HttpWebResponse)request.EndGetResponse(result));
callback(this.response);
},
null);
}
else
{
callback(this.response);
}
}
/// <summary>
/// Creates a <see cref="TimeZoneResponse"/> from the given <see cref="HttpWebResponse"/>.
/// </summary>
/// <param name="webResponse">The web response to create the time zone response from.</param>
/// <returns>The created time zone response.</returns>
private static TimeZoneResponse CreateResponse(HttpWebResponse webResponse)
{
TimeZoneResponse response = webResponse.StatusCode == HttpStatusCode.OK ?
TimeZoneResponse.FromXml(webResponse.GetResponseStream()) :
new TimeZoneResponse();
if (response.Status == TimeZoneCallStatus.Success && String.IsNullOrEmpty(response.TimeZone))
{
response = new TimeZoneResponse();
}
return response;
}
public TimeZoneResponse GetResponse()
{
if (this.response == null)
{
WebRequest request = WebRequest.Create(this.RequestUri);
this.response = CreateResponse((HttpWebResponse)request.GetResponse());
}
return this.response;
}