using COSXML.Model.Object;
using COSXML.Auth;
using System;
using COSXML;

namespace COSSnippet
{
    public class HeadObjectModel {

      private CosXml cosXml;

      HeadObjectModel() {
        CosXmlConfig config = new CosXmlConfig.Builder()
          .SetRegion("COS_REGION") // Set the default region. For abbreviations of COS regions, visit https://www.tencentcloud.com/document/product/436/6224?from_cn_redirect=1.
          .Build();

        string secretId = "SECRET_ID";   // SecretId of the TencentCloud API. For more information about how to obtain the API key, see https://console.tencentcloud.com/cam/capi.
        string secretKey = "SECRET_KEY"; // SecretKey of the TencentCloud API. For more information about how to obtain the API key, see https://console.tencentcloud.com/cam/capi.
        long durationSecond = 600;          // Validity period of the request signature in seconds
        QCloudCredentialProvider qCloudCredentialProvider = new DefaultQCloudCredentialProvider(secretId, 
          secretKey, durationSecond);

        this.cosXml = new CosXmlServer(config, qCloudCredentialProvider);
      }

      /// Obtain object information
      public void HeadObject()
      {
        //.cssg-snippet-body-start:[head-object]
        try
        {
          // Bucket name in the format of bucketname-APPID. You can get APPID by referring to https://console.tencentcloud.com/developer.
          string bucket = "examplebucket-1250000000";
          string key = "exampleobject"; // Object key
          HeadObjectRequest request = new HeadObjectRequest(bucket, key);
          // Execute the request
          HeadObjectResult result = cosXml.HeadObject(request);
          // Request succeeded
          Console.WriteLine(result.GetResultInfo());
          // Print CRC64 value of the object
          Console.WriteLine(result.crc64ecma);
          // Print ETag of the object
          Console.WriteLine(result.eTag);
        }
        catch (COSXML.CosException.CosClientException clientEx)
        {
          // Request failed
          Console.WriteLine("CosClientException: " + clientEx);
        }
        catch (COSXML.CosException.CosServerException serverEx)
        {
          // Request failed
          Console.WriteLine("CosServerException: " + serverEx.GetInfo());
        }

        //.cssg-snippet-body-end
      }
      // .cssg-methods-pragma

      static void Main(string[] args)
      {
        HeadObjectModel m = new HeadObjectModel();

        /// Obtain object information
        m.HeadObject();
        // .cssg-methods-pragma
      }
    }
}