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    【记录】尝试使用AWS SDK for .NET去实现C#版本的ItemLookup

    Amazon crifan 3886浏览 0评论

    【背景】

    折腾：

    【基本解决】用C#实现AWS的API中的ItemLookup

    期间，已经下载并安装了AWS SDK for .NET。

    接下来，尝试使用此Amazon的库，去实现对应的ItemLookup。

    【折腾过程】

    1.参考：

    Starting a New Project

    去在VS1020中新建一个AWS Console Project：

    aws console project

    2.然后输入Access Key ID等信息：

    aws access credentials key id

    3.生成的代码如下：

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    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Text;
     
    using Amazon;
    using Amazon.EC2;
    using Amazon.EC2.Model;
    using Amazon.SimpleDB;
    using Amazon.SimpleDB.Model;
    using Amazon.S3;
    using Amazon.S3.Model;
     
    namespace AwsConsoleApp1
    {
        class Program
        {
            public static void Main(string[] args)
            {
                Console.Write(GetServiceOutput());
                Console.Read();
            }
     
            public static string GetServiceOutput()
            {
                StringBuilder sb = new StringBuilder(1024);
                using (StringWriter sr = new StringWriter(sb))
                {
                    sr.WriteLine("===========================================");
                    sr.WriteLine("Welcome to the AWS .NET SDK!");
                    sr.WriteLine("===========================================");
     
                    // Print the number of Amazon EC2 instances.
                    AmazonEC2 ec2 = AWSClientFactory.CreateAmazonEC2Client(RegionEndpoint.USWest2);
                    DescribeInstancesRequest ec2Request = new DescribeInstancesRequest();
     
                    try
                    {
                        DescribeInstancesResponse ec2Response = ec2.DescribeInstances(ec2Request);
                        int numInstances = 0;
                        numInstances = ec2Response.DescribeInstancesResult.Reservation.Count;
                        sr.WriteLine("You have " + numInstances + " Amazon EC2 instance(s) running in the US-East (Northern Virginia) region.");
     
                    }
                    catch (AmazonEC2Exception ex)
                    {
                        if (ex.ErrorCode != null && ex.ErrorCode.Equals("AuthFailure"))
                        {
                            sr.WriteLine("The account you are using is not signed up for Amazon EC2.");
                            sr.WriteLine("You can sign up for Amazon EC2 at http://aws.amazon.com/ec2");
                        }
                        else
                        {
                            sr.WriteLine("Caught Exception: " + ex.Message);
                            sr.WriteLine("Response Status Code: " + ex.StatusCode);
                            sr.WriteLine("Error Code: " + ex.ErrorCode);
                            sr.WriteLine("Error Type: " + ex.ErrorType);
                            sr.WriteLine("Request ID: " + ex.RequestId);
                            sr.WriteLine("XML: " + ex.XML);
                        }
                    }
                    sr.WriteLine();
     
                    // Print the number of Amazon SimpleDB domains.
                    AmazonSimpleDB sdb = AWSClientFactory.CreateAmazonSimpleDBClient(RegionEndpoint.USWest2);
                    ListDomainsRequest sdbRequest = new ListDomainsRequest();
     
                    try
                    {
                        ListDomainsResponse sdbResponse = sdb.ListDomains(sdbRequest);
     
                        if (sdbResponse.IsSetListDomainsResult())
                        {
                            int numDomains = 0;
                            numDomains = sdbResponse.ListDomainsResult.DomainName.Count;
                            sr.WriteLine("You have " + numDomains + " Amazon SimpleDB domain(s) in the US-East (Northern Virginia) region.");
                        }
                    }
                    catch (AmazonSimpleDBException ex)
                    {
                        if (ex.ErrorCode != null && ex.ErrorCode.Equals("AuthFailure"))
                        {
                            sr.WriteLine("The account you are using is not signed up for Amazon SimpleDB.");
                            sr.WriteLine("You can sign up for Amazon SimpleDB at http://aws.amazon.com/simpledb");
                        }
                        else
                        {
                            sr.WriteLine("Caught Exception: " + ex.Message);
                            sr.WriteLine("Response Status Code: " + ex.StatusCode);
                            sr.WriteLine("Error Code: " + ex.ErrorCode);
                            sr.WriteLine("Error Type: " + ex.ErrorType);
                            sr.WriteLine("Request ID: " + ex.RequestId);
                            sr.WriteLine("XML: " + ex.XML);
                        }
                    }
                    sr.WriteLine();
     
                    // Print the number of Amazon S3 Buckets.
                    AmazonS3 s3Client = AWSClientFactory.CreateAmazonS3Client(RegionEndpoint.USWest2);
     
                    try
                    {
                        ListBucketsResponse response = s3Client.ListBuckets();
                        int numBuckets = 0;
                        if (response.Buckets != null &&
                            response.Buckets.Count > 0)
                        {
                            numBuckets = response.Buckets.Count;
                        }
                        sr.WriteLine("You have " + numBuckets + " Amazon S3 bucket(s) in the US Standard region.");
                    }
                    catch (AmazonS3Exception ex)
                    {
                        if (ex.ErrorCode != null && (ex.ErrorCode.Equals("InvalidAccessKeyId") ||
                            ex.ErrorCode.Equals("InvalidSecurity")))
                        {
                            sr.WriteLine("Please check the provided AWS Credentials.");
                            sr.WriteLine("If you haven't signed up for Amazon S3, please visit http://aws.amazon.com/s3");
                        }
                        else
                        {
                            sr.WriteLine("Caught Exception: " + ex.Message);
                            sr.WriteLine("Response Status Code: " + ex.StatusCode);
                            sr.WriteLine("Error Code: " + ex.ErrorCode);
                            sr.WriteLine("Request ID: " + ex.RequestId);
                            sr.WriteLine("XML: " + ex.XML);
                        }
                    }
                    sr.WriteLine("Press any key to continue...");
                }
                return sb.ToString();
            }
        }
    }

    调试运行结果是，3个示例，都出错：

    ===========================================

    Welcome to the AWS .NET SDK!

    ===========================================

    Caught Exception: You are not subscribed to this service. Please go to http://aws.amazon.com to subscribe.

    Response Status Code: Unauthorized

    Error Code: OptInRequired

    Error Type: Unknown

    Request ID: bae99725-79b4-4850-946f-b43a96ff1d67

    XML: <?xml version="1.0" encoding="UTF-8"?>

    <Response><Errors><Error><Code>OptInRequired</Code><Message>You are not subscribed to this service. Please go to http://aws.amazon.com to subscribe.</Message></Error></Errors><RequestID>bae99725-79b4-

    4850-946f-b43a96ff1d67</RequestID></Response>

    Caught Exception: Subscription check failed. Please sign up for Amazon SimpleDB service.

    Response Status Code: Unauthorized

    Error Code: SubscriptionCheckFailed

    Error Type: Unknown

    Request ID: 7596a4d6-3305-cc36-2652-76c824b3a5fe

    XML: <?xml version="1.0"?>

    <Response><Errors><Error><Code>SubscriptionCheckFailed</Code><Message>Subscription check failed. Please sign up for Amazon SimpleDB service.</Message></Error></Errors><RequestID>7596a4d6-3305-cc36-265

    2-76c824b3a5fe</RequestID></Response>

    Caught Exception: Your account is not signed up for the S3 service. You must sign up before you can use S3.

    Response Status Code: Forbidden

    Error Code: NotSignedUp

    Request ID: B3C78A53611A5924

    XML: <?xml version="1.0" encoding="UTF-8"?>

    <Error><Code>NotSignedUp</Code><Message>Your account is not signed up for the S3 service. You must sign up before you can use S3.</Message><RequestId>B3C78A53611A5924</RequestId><HostId>t1vuXxSv2r180q

    bV/OnaDmv3XzVV/4DK2NyJD/4wCPg1MOLzuWT3xR99Lb16EcHB</HostId></Error>

    Press any key to continue…

    因为我自己没注册相关服务。

     

    4.想办法，参考别人代码，去试试ItemLookup，但是结果找不到AWSECommerceService和ItemLookup：

    【已解决】已装AWS SDK for .NET，但是C#中找不到AWSECommerceService和ItemLookup

     

    5.另外，先参考了：

    C# search amazon example with new amazon service

    某人回复说到，2011年11月后，好像对于所有的request，都要加上一个Associate Tag的，否则貌似返回都是null和错误。

     

    6.然后就可以继续去写代码了。

    7.又参考：

    http://flyingpies.wordpress.com/2009/08/13/signing-amazon-product-advertising-api-cwcf-part-2/

    下载了：

    AmazonProductAdvtApiWcfSample.zip, 324KB, 8/1/2009

    然后参考其项目，把Amazon.ECS.Addons中的三个cs文件：

    AmazonHeader.cs

    AmazonSigningEndpointBehavior.cs

    AmazonSigningMessageInspector.cs

    都添加进来了，然后才可以找到AmazonSigningEndpointBehavior

    8.期间代码调试无法正常获得response，后来参考：

    ItemLookup returns null

    找到：

    Product Advertising API Change Details

    得知：

    Associate Tag Parameter: Every request made to the API should include a valid Associate Tag. Any request that does not contain a valid Associate Tag will be rejected with an appropriate error message. For details on the Associate Tag parameter, please refer to our Developer guide.

    即，必须包括Associate Tag才可以的。

    所以，去：

    https://affiliate-program.amazon.com/

    注册一个。

    9.后来，用代码：

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    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
     
    using AwsWinformApiDemo.AWSECommerceService;
    using System.ServiceModel;
    using Async;
     
    namespace AwsWinformApiDemo
    {
        public partial class AmazonAws : Form
        {
            private const string accessKeyId = "xxx";
            private const string secretKey = "yyy";
            private const string associateTag = "zzz";
     
            public AmazonAws()
            {
                InitializeComponent();
            }
     
            private void AmazonAws_Load(object sender, EventArgs e)
            {
            //    //AWSECommerceServicePortTypeClient amazonClient = new AWSECommerceServicePortTypeClient();
     
                //http://stackoverflow.com/questions/8142909/c-sharp-search-amazon-example-with-new-amazon-service
                BasicHttpBinding binding = new BasicHttpBinding(BasicHttpSecurityMode.Transport);
                binding.MaxReceivedMessageSize = int.MaxValue;
                AWSECommerceServicePortTypeClient amazonClient = new AWSECommerceServicePortTypeClient(
                            binding,
                            new EndpointAddress("https://webservices.amazon.com/onca/soap?Service=AWSECommerceService"));
                // add authentication to the ECS client
                amazonClient.ChannelFactory.Endpoint.Behaviors.Add(new AmazonSigningEndpointBehavior(accessKeyId, secretKey));
     
                ItemLookup lookup = new ItemLookup();
                ItemLookupRequest lookupReq = new ItemLookupRequest();
                ItemLookupResponse lookupResp = new ItemLookupResponse();
     
                lookup.AWSAccessKeyId = secretKey;
                lookup.AssociateTag = associateTag;
     
                //http://docs.aws.amazon.com/AWSECommerceService/2011-08-01/DG/ItemLookup.html
                lookupReq.IdType = ItemLookupRequestIdType.ASIN; //Amazon Standard Identification Number
     
                //http://www.amazon.com/gp/product/B0083PWAPW
                lookupReq.ItemId = new string[] { "B0083PWAPW" };
     
                //http://docs.aws.amazon.com/AWSECommerceService/latest/DG/OfferSummaries.html
                lookupReq.ResponseGroup = new string[] { "OfferSummary" };
     
                //http://stackoverflow.com/questions/6460936/amazon-product-advertising-api-item-lookup-request-working-example
                lookupReq.SearchIndex = "All";
     
                lookup.Request = new ItemLookupRequest[] { lookupReq };
     
                lookupResp = amazonClient.ItemLookup(lookup);
                MessageBox.Show(lookupResp.ToString());
     
                ////https://forums.aws.amazon.com/message.jspa?messageID=318807
                //BasicHttpBinding binding = new BasicHttpBinding(BasicHttpSecurityMode.Transport);
                //binding.MaxReceivedMessageSize = int.MaxValue;
                //binding.ReaderQuotas.MaxStringContentLength = int.MaxValue;
     
                //AWSECommerceServicePortTypeClient client = new AWSECommerceServicePortTypeClient(
                //                binding,
                //                new EndpointAddress("https://webservices.amazon.com/onca/soap?Service=AWSECommerceService"));
                //                //new EndpointAddress("https://aws.amazonaws.com/onca/soap"));
     
                //client.ChannelFactory.Endpoint.Behaviors.Add(new AmazonSigningEndpointBehavior(accessKeyId, secretKey));
     
                //ItemLookupRequest[] request = new ItemLookupRequest[1];
                //request[0] = new ItemLookupRequest();
                //request[0].ItemId = new string[] { "0762744499" };
     
                //ItemLookup itemLookup = new ItemLookup();
                //itemLookup.Request = request;
                //itemLookup.AWSAccessKeyId = accessKeyId;
                //itemLookup.AssociateTag = associateTag;
     
                //ItemLookupResponse response = new ItemLookupResponse();
                //response = client.ItemLookup(itemLookup);
                //MessageBox.Show(response.ToString());
            }
        }
    }

    还是不行。

    不仅仅是无法获得lookupResp，而且是，对于这一行的调试，都无法执行到。好像是由于异步执行的原因。

    10.参考：

    Amazon API, Product Advertising API , ItemSearch, C#

    ->

    search items with .NET : ItemSearchResponse always null

    下载到：

    Simple.Amazon.ECS.zip

    结果发现只有两个文件：AWSECommerceService.wsdl和Reference.cs

    不是完整的项目，没啥参考价值。

    因为这两个内容，之前都已经通过

    http://webservices.amazon.com/AWSECommerceService/AWSECommerceService.wsdl

    添加进来了，且都已经是最新的了。

    11.随便试试，去配置一下已加的那个服务：

    右击AWSECommerceService->Configure Service Reference：

    generate asynchronous operations

    然后再去运行代码试试，看看能否debug到。

    结果问题依旧。

     

    【总结】

    暂时是：

    通过AWS的SDK，搞不定；

    通过那个AWSECommerceServicePortTypeClient，也搞不定；

    所以，放弃此方向的折腾。

    后续折腾参见：

    【基本解决】用C#实现AWS的API中的ItemLookup

    转载请注明：在路上 » 【记录】尝试使用AWS SDK for .NET去实现C#版本的ItemLookup

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