public async Task <string> Send(NameValueCollection parameters)
{
if (string.IsNullOrWhiteSpace(_parameters.CallbackApiUrl))
{
return(null);
}
var targerUrl = $"{_parameters.CallbackApiUrl}{(_parameters.CallbackApiUrl.IndexOf("?", StringComparison.Ordinal) < 0 ? "?" : "&")}apikey={_parameters.ApiKey}";
StringBuilder sb = new StringBuilder();
foreach (string key in parameters.AllKeys)
{
if (sb.Length > 0)
{
sb.Append("&");
}
sb.AppendFormat("{0}={1}", key, HttpUtility.UrlEncode(parameters[key]));
}
_parameters.Log?.Invoke($"WorkflowProviderWebApi Send request {targerUrl}");
var request = (HttpWebRequest)WebRequest.Create(targerUrl);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
using (var stream = await request.GetRequestStreamAsync())
{
byte[] buffer = Encoding.Default.GetBytes(sb.ToString());
await stream.WriteAsync(buffer, 0, buffer.Length);
}
var response = (HttpWebResponse)await request.GetResponseAsync();
var responseString = await new StreamReader(response.GetResponseStream()).ReadToEndAsync();
return(HttpUtility.UrlDecode(responseString));
}