topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

mashup-amazon-15-Amazon-S3-App-Code-S3Helper.cs / cs


  using System;
  using System.Data;
  using System.Configuration;
  using System.Web;
  using System.Web.Security;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Web.UI.WebControls.WebParts;
  using System.Web.UI.HtmlControls;
  using System.Text;
  using System.Security.Cryptography;
  
   


   Summary description for S3Helper


   


  public class S3Helper
  {
      public S3Helper()
      {
          //
          // TODO: Add constructor logic here
          //
      }

<summary> Formats the provided time as a string limited to millisecond precision </summary> <param name="myTime"></param> <returns></returns> public static string FormatTimeStamp(DateTime myTime) { DateTime myUniversalTime = myTime.ToUniversalTime(); return myUniversalTime.ToString("yyyy-MM-dd\\THH:mm:ss.fff\\Z", System.Globalization.CultureInfo.InvariantCulture); }

<summary> Returns a new DateTime object set to the provided time but with precision limited to milliseconds. </summary> <param name="myTime"></param> <returns></returns> public static DateTime GetTimeStamp(DateTime myTime) { DateTime myUniversalTime = myTime.ToUniversalTime(); DateTime myNewTime = new DateTime(myUniversalTime.Year, myUniversalTime.Month, myUniversalTime.Day, myUniversalTime.Hour, myUniversalTime.Minute, myUniversalTime.Second, myUniversalTime.Millisecond);


          return myNewTime;
              
      }
  
      public static string GetSignature(string mySecretAccessKeyId, string strOperation, DateTime myTime)
      {
          Encoding myEncoding = new UTF8Encoding();
  
          // Create the source string which is used to create the digest
          string mySource = "AmazonS3" + strOperation + FormatTimeStamp(myTime);
  
          // Create a new Cryptography class using the 
          // Secret Access Key as the key
          HMACSHA1 myCrypto = new HMACSHA1(myEncoding.GetBytes(mySecretAccessKeyId));
  
          // Convert the source string to an array of bytes
          char[] mySourceArray = mySource.ToCharArray();
          
          // Convert the source to a UTF8 encoded array of bytes
          byte[] myUTF8Bytes = myEncoding.GetBytes(mySourceArray);
          
          // Calculate the digest 
          byte[] strDigest = myCrypto.ComputeHash(myUTF8Bytes);
                                                        
          return Convert.ToBase64String(strDigest);
      }
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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