public LookupAmazonListingResponse LookupAmazonListings(LookupAmazonListingRequest lookupAmazonListingRequest)
{
Dictionary <string, decimal> amazonListings = new Dictionary <string, decimal>();
foreach (IEnumerable <string> batchedAsins in lookupAmazonListingRequest.ASINs.Batch(c_asinBatchSize))
{
Dictionary <string, string> optionalParameters = new Dictionary <string, string>();
optionalParameters["ItemId"] = string.Join(",", batchedAsins);
optionalParameters["IdType"] = IdType.ASIN.ToString();
optionalParameters["Operation"] = Operation.ItemLookup.ToString();
optionalParameters["ResponseGroup"] = ResponseGroup.OfferFull.ToString();
optionalParameters["Condition"] = "New";
optionalParameters["MerchantId"] = "Amazon";
ProductAdvApiResponse response = SignAndIssueRequest(optionalParameters);
Dictionary <string, decimal> batchedAmazonListings = ItemLookupUtility.ReadAmazonListingResponse(response.Nodes);
foreach (KeyValuePair <string, decimal> amazonListing in batchedAmazonListings)
{
if (!amazonListings.ContainsKey(amazonListing.Key))
{
amazonListings.Add(amazonListing.Key, amazonListing.Value);
}
}
}
return(new LookupAmazonListingResponse
{
AmazonListings = amazonListings
});
}
public static ProductAdvApiResponse IssueRequest(string requestUrl, string namespaceWebServices)
{
Func <ProductAdvApiResponse> func = () =>
{
ProductAdvApiResponse returnValue;
XmlDocument doc = new XmlDocument();
try
{
WebRequest request = WebRequest.Create(requestUrl);
WebResponse response = request.GetResponse();
Stream stream = response.GetResponseStream();
if (stream != null)
{
doc.Load(stream);
}
XmlNodeList nodeList = doc.GetElementsByTagName("Item");
List <XmlNode> nodes = new List <XmlNode>();
bool errored = true;
if (IsValidResponse(doc, namespaceWebServices))
{
errored = false;
nodes.AddRange(nodeList.Cast <XmlNode>());
}
returnValue = new ProductAdvApiResponse(nodes, errored);
}
catch (Exception)
{
throw new RetryException("Throttled, attempt again after waiting.");
}
finally
{
Thread.Sleep(c_millisecondsPerSecond / c_requestsPerSecond); //Make sure we don't run out of the allotted requests.
}
return(returnValue);
};
ProductAdvApiResponse productAdvApiResponse = func.Retry(c_numberOfRetries, c_timeToWaitToBecomeUnthrottled);
if (productAdvApiResponse == null)
{
XmlNode node = new XmlDocument();
productAdvApiResponse = new ProductAdvApiResponse(node, true);
}
return(productAdvApiResponse);
}
