/// <summary>
/// Download metar synchronously.
/// </summary>
/// <param name="ICAO">Icao code of airport/station.</param>
/// <returns>Metar as string.</returns>
/// <exception cref="DownloadException">
/// Raised when any error occurs.
/// </exception>
public string Download(string ICAO)
{
string ret = "";
WebRequest req = HttpWebRequest.Create(
retr.GetUrlForICAO(ICAO));
try
{
WebResponse resp = req.GetResponse();
System.IO.Stream respStream = resp.GetResponseStream();
ret = retr.DecodeWMOCode(respStream);
respStream.Close();
resp.Close();
}
catch (Exception ex)
{
throw new DownloadException("Failed to download metar from web.", ex);
}
return(ret);
}
/// <summary>
/// Download metar asynchronously.
/// </summary>
/// <param name="icao">Icao code of airport/station.</param>
/// <param name="handler">The HTTP handler stack to use for sending requests.</param>
/// <param name="disposeHandler">The value indicating whether the <paramref name="handler"/> must be disposed after the operation completes.</param>
/// <exception cref="ArgumentNullException"><paramref name="icao"/> is <see langword="null"/>.</exception>
/// <exception cref="ArgumentNullException"><paramref name="handler"/> is <see langword="null"/>.</exception>
public async Task <string> DownloadAsync(
string icao,
HttpMessageHandler handler,
bool disposeHandler)
{
if (icao == null)
{
throw new ArgumentNullException(nameof(icao));
}
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
var url = _retriever.GetUrlForICAO(icao);
var httpClient = new HttpClient(handler, disposeHandler);
try
{
using (var response = await httpClient.GetStreamAsync(url).ConfigureAwait(false))
{
return(await _retriever.DecodeWMOCodeAsync(response).ConfigureAwait(false));
}
}
catch (Exception ex)
{
throw new DownloadException("Failed to download metar from web.", ex);
}
finally
{
httpClient.Dispose();
}
}