public DescribeInstancesResponse DoDescribeInstances(DescribeInstancesRequest request)
{
List<string> lParams = new List<string>();
lParams.Add(string.Format("AWSAccessKeyId={0}", Util.UrlEncode(AccessKey)));
lParams.Add(string.Format("Action={0}", "DescribeInstances"));
lParams.Add(string.Format("SignatureMethod={0}", "HmacSHA256"));
lParams.Add(string.Format("SignatureVersion={0}", "2"));
lParams.Add(string.Format("Timestamp={0}", Util.UrlEncode(DateTime.UtcNow.ToString("yyyy-MM-ddTHH:mm:ssZ"))));
lParams.Add(string.Format("Version={0}", "2012-07-20"));
for (int i = 0; i < request.Filters.Count; i++)
{
var filter = request.Filters[i];
lParams.Add(string.Format("Filter.{0}.Name={1}", i + 1, Util.UrlEncode(filter.Name)));
for (int a = 0; a < filter.Values.Count; a++)
{
lParams.Add(string.Format("Filter.{0}.Value.{1}={2}", i + 1, a + 1, Util.UrlEncode(filter.Values[a])));
}
}
lParams.Sort(StringComparer.Ordinal);
var parameters = string.Join("&", lParams);
string sig = Util.GetSignature(URL, "GET", parameters, SecretKey);
parameters = string.Format("{0}&Signature={1}", parameters, Util.UrlEncode(sig));
var wRequest = WebRequest.Create(string.Format("{0}?{1}", URL, parameters)) as HttpWebRequest;
wRequest.Method = "GET";
wRequest.ContentType = "application/x-www-form-urlencoded";
wRequest.KeepAlive = false;
using (var response = wRequest.GetResponse() as HttpWebResponse)
using (var stream = response.GetResponseStream())
using (var reader = new StreamReader(stream))
{
var body = reader.ReadToEnd();
var element = XElement.Parse(body);
XmlSerializer serializer = new XmlSerializer(typeof(DescribeInstancesResponse));
var describeInstancesResponse = (DescribeInstancesResponse)serializer.Deserialize(element.CreateReader());
return describeInstancesResponse;
}
}
public DescribeInstancesResponse DescribeInstances(DescribeInstancesRequest request)
{
return Util.RetryMethod<DescribeInstancesResponse>(() => DoDescribeInstances(request), RetryCount);
}
