public string HttpGet(string url, List <KeyValue> parameterList, List <KeyValue> httpHeaderList)
{
this.Sleep();
if (ReportUrl)
{
ReportManage.Report(this, "GET " + url, true, true);
}
System.Net.Http.HttpClient client = GetHttpClient();
client.SetHeader(httpHeaderList);
var result = client.GetStringAsync(url).ConfigureAwait(false).GetAwaiter().GetResult();
client.RemoveHeader(httpHeaderList);
return(result);
}