public void ShortUrlAsync(string longUrl, object userState, AsyncCompletedCallback <string> callback)
{
if (!string.IsNullOrEmpty(ApiKey))
{
Shrink(longUrl, userState, callback);
}
else
{
ApiKeyInputWindow apiKeyInput = new ApiKeyInputWindow();
apiKeyInput.Show();
apiKeyInput.ApiKeyReceived += (s, e) =>
{
ApiKey = apiKeyInput.ApiKey;
Shrink(longUrl, userState, callback);
};
}
}
private void Shrink(string longUrl, object userState, AsyncCompletedCallback <string> callback)
{
string requestUrl = String.Format(Endpoint, longUrl, ApiKey);
WebRequest request = WebRequest.Create(new Uri(requestUrl));
request.BeginGetResponse(
s =>
{
Exception error;
string shortUrl = String.Empty;
try
{
WebResponse response = request.EndGetResponse(s);
using (StreamReader sr = new StreamReader(response.GetResponseStream()))
{
shortUrl = sr.ReadToEnd();
}
error = ValidateShortUrl(shortUrl);
if (error != null && error.Message.Contains("ApiKey"))
{
ApiKey = string.Empty;
}
}
catch (Exception ex)
{
error = ex;
}
callback(this, new AsyncCompletedEventArgs <string>(error, false, userState, shortUrl));
},
null);
}
