亚马逊产品广告api-项目查找请求工作示例

if (!(string.IsNullOrEmpty(ISBN) && string.IsNullOrEmpty(ASIN)))
{
    AWSECommerceServicePortTypeClient client = new AWSECommerceServicePortTypeClient();
    client.ChannelFactory.Endpoint.Behaviors.Add(
        new Amazon.AmazonSigningEndpointBehavior(
            accessKeyId,
            secretKey);

    ItemLookup lookup = new ItemLookup();
    ItemLookupRequest request = new ItemLookupRequest();
    lookup.AssociateTag = accessKeyId;
    lookup.AWSAccessKeyId = secretKey;
//... etc.

namespace Amazon
{
    public class AmazonSigningEndpointBehavior : IEndpointBehavior {
        private string    accessKeyId    = \"\";
        private string    secretKey    = \"\";

        public AmazonSigningEndpointBehavior(string accessKeyId, string secretKey) {
            this.accessKeyId    = accessKeyId;
            this.secretKey        = secretKey;
        }

        public void ApplyClientBehavior(ServiceEndpoint serviceEndpoint, ClientRuntime clientRuntime) {
            clientRuntime.MessageInspectors.Add(new AmazonSigningMessageInspector(accessKeyId, secretKey));
        }

        public void ApplyDispatchBehavior(ServiceEndpoint serviceEndpoint, EndpointDispatcher endpointDispatcher) { return; }
        public void Validate(ServiceEndpoint serviceEndpoint) { return; }
        public void AddBindingParameters(ServiceEndpoint serviceEndpoint, BindingParameterCollection bindingParameters) { return; }
    }
}

namespace Amazon
{
    public class AmazonSigningMessageInspector : IClientMessageInspector {
        private string    accessKeyId    = \"\";
        private string    secretKey    = \"\";

        public AmazonSigningMessageInspector(string accessKeyId, string secretKey) {
            this.accessKeyId    = accessKeyId;
            this.secretKey        = secretKey;
        }

        public object BeforeSendRequest(ref Message request, IClientChannel channel) {
            // prepare the data to sign
            string        operation        = Regex.Match(request.Headers.Action, \"[^/]+$\").ToString();
            DateTime    now                = DateTime.UtcNow;
            string        timestamp        = now.ToString(\"yyyy-MM-ddTHH:mm:ssZ\");
            string        signMe            = operation + timestamp;
            byte[]        bytesToSign        = Encoding.UTF8.GetBytes(signMe);

            // sign the data
            byte[]        secretKeyBytes    = Encoding.UTF8.GetBytes(secretKey);
            HMAC        hmacSha256        = new HMACSHA256(secretKeyBytes);
            byte[]        hashBytes        = hmacSha256.ComputeHash(bytesToSign);
            string        signature        = Convert.ToBase64String(hashBytes);

            // add the signature information to the request headers
            request.Headers.Add(new AmazonHeader(\"AWSAccessKeyId\", accessKeyId));
            request.Headers.Add(new AmazonHeader(\"Timestamp\", timestamp));
            request.Headers.Add(new AmazonHeader(\"Signature\", signature));

            return null;
        }

        public void AfterReceiveReply(ref Message reply, object correlationState) { }
    }
}

namespace Amazon
{
    public class AmazonHeader : MessageHeader
    {
        private string name;
        private string value;

        public AmazonHeader(string name, string value)
        {
            this.name = name;
            this.value = value;
        }

        public override string Name { get { return name; } }
        public override string Namespace { get { return \"http://security.amazonaws.com/doc/2007-01-01/\"; } }

        protected override void OnWriteHeaderContents(XmlDictionaryWriter xmlDictionaryWriter, MessageVersion messageVersion)
        {
            xmlDictionaryWriter.WriteString(value);
        }
    }
}

PM> Install-Package Nager.AmazonProductAdvertising

var authentication = new AmazonAuthentication();
authentication.AccessKey = \"accesskey\";
authentication.SecretKey = \"secretkey\";

var wrapper = new AmazonWrapper(authentication, AmazonEndpoint.DE);
var result = wrapper.Lookup(\"0393326381\", AmazonResponseGroup.OfferSummary);

var request = new ItemLookupRequest();
request.ItemId = new[] {upcCode};
request.IdType = ItemLookupRequestIdType.UPC;
request.IdTypeSpecified = true;
request.SearchIndex = \"All\";

var item = client.LookupByAsin(\"B0037X9N5U\");
double? price = item.GetLowestPrice();