/// <summary>
/// Initializes a new instance of the <see cref="MwsException"/> class.
/// Initializes exception with information available from the service plus from an exception
/// Needed for backwards compatibility.
/// </summary>
/// <param name="statusCode">HTTP status code for error response (as an int).</param>
/// <param name="message">Error message from HTTP header.</param>
/// <param name="errorCode">Error code from response XML.</param>
/// <param name="errorType">Error type from response XML.</param>
/// <param name="xml">Compete XML found in response.</param>
/// <param name="rhmd">Response header information.</param>
/// <param name="cause">Wrapped exception.</param>
public MwsException(int statusCode, string message, string errorCode, string errorType, string xml, MwsResponseHeaderMetadata rhmd, Exception cause)
: base()
{
_statusCode = statusCode;
_rhmd = rhmd;
_xml = xml;
_errorType = errorType;
_errorCode = errorCode;
_message = message;
if (xml != null)
{
PopulateFromXML(xml);
}
if (cause is MwsException)
{
PopulateFromMWSException((MwsException)cause);
}
}
private void PopulateFromMWSException(MwsException e)
{
if (e.StatusCode != null)
{
_statusCode = (int)e.StatusCode;
}
if (e.Message != null)
{
_message = e.Message;
}
if (e._errorCode != null)
{
_errorCode = e.ErrorCode;
}
if (e._errorType != null)
{
_errorType = e.ErrorType;
}
if (e._detail != null)
{
_detail = e.Detail;
}
if (e._xml != null)
{
_xml = e.XML;
}
if (e.ResponseHeaderMetadata != null)
{
_rhmd = e.ResponseHeaderMetadata;
}
}
public MwsResponseHeaderMetadata(MwsResponseHeaderMetadata rhmd)
: this(rhmd.RequestId, rhmd.ResponseContext, rhmd.Timestamp, rhmd.QuotaMax, rhmd.QuotaRemaining, rhmd.QuotaResetsAt)
{
}
/// <summary>
/// Creates a request and invokes it.
/// </summary>
/// <returns></returns>
/// <exception cref="MwsException">Exceptions from invoking the request.</exception>
public IMwsReader Invoke()
{
string responseBody;
string message;
var statusCode = default(HttpStatusCode);
/* Add required request parameters */
AddRequiredParameters();
var queryString = GetParametersAsString(_parameters);
var retries = 0;
do
{
/* Submit the request and read response body */
try
{
request = _connection.GetHttpClient(_serviceEndPoint.URI);
var requestData = new UTF8Encoding().GetBytes(queryString);
request.ContentLength = requestData.Length;
using (var requestStream = request.GetRequestStream())
{
requestStream.Write(requestData, 0, requestData.Length);
}
using (var httpResponse = request.GetResponse() as HttpWebResponse)
{
statusCode = httpResponse.StatusCode;
message = httpResponse.StatusDescription;
_ResponseHeaderMetadata = GetResponseHeaderMetadata(httpResponse);
var reader = new StreamReader(httpResponse.GetResponseStream(), Encoding.UTF8);
responseBody = reader.ReadToEnd();
}
if (statusCode == HttpStatusCode.OK)
{
return(new MwsXmlReader(responseBody));
}
var e = new MwsException((int)statusCode, message, null, null, responseBody, _ResponseHeaderMetadata);
if (statusCode == HttpStatusCode.InternalServerError)
{
if (PauseIfRetryNeeded(retries++))
{
continue;
}
}
throw e;
}
/* Web exception is thrown on unsuccessful responses */
catch (WebException we)
{
using (var httpErrorResponse = (HttpWebResponse)we.Response as HttpWebResponse)
{
if (httpErrorResponse == null)
{
throw new MwsException(we);
}
statusCode = httpErrorResponse.StatusCode;
using (var reader = new StreamReader(httpErrorResponse.GetResponseStream(), Encoding.UTF8))
{
responseBody = reader.ReadToEnd();
}
}
// retry logic
if (PauseIfRetryNeeded(retries++))
{
continue;
}
throw new MwsException((int)statusCode, null, null, null, responseBody, null);
}
/* Catch other exceptions, attempt to convert to formatted exception,
* else rethrow wrapped exception */
catch (Exception e)
{
throw new MwsException(e);
}
}while (true);
}
/// <summary>
/// Initializes a new instance of the <see cref="MwsException"/> class.
/// Initializes exception with information available from the service.
/// </summary>
/// <param name="statusCode">HTTP status code for error response (as an int).</param>
/// <param name="message">Error message from HTTP header.</param>
/// <param name="errorCode">Error code from response XML.</param>
/// <param name="errorType">Error type from response XML.</param>
/// <param name="xml">Compete XML found in response.</param>
/// <param name="rhmd">Response header information.</param>
public MwsException(int statusCode, string message, string errorCode, string errorType, string xml, MwsResponseHeaderMetadata rhmd)
: this(statusCode, message, errorCode, errorType, xml, rhmd, null)
{
}
