解碼引用的可打印信息

Question

Iam無法解碼日文信息，最終輸出似乎是垃圾值。

編碼ISO-2022-JP引用Printable消息：

「= 82 = B1 = 82 = EA = 82 = CD = 92P = 82 = C8 = 82 = E9 = 83E = 83X =83克= 82 = C5 = 82 = B7 = 82 = DD = 82 = C8 = 82 = B3 = \ r \ n = 82 = F1 = 81A = 82 = B1 = 82 = F1 = 82 = C9 = 82 = BF = 82 = CD 「

代碼，用於解碼引用Printable：

private static string Decode(string input, string bodycharset) 
    { 
     var i = 0; 
     var output = new List<byte>(); 
     while (i < input.Length) 
     { 
      if (input[i] == '=' && input[i + 1] == '\r' && input[i + 2] == '\n') 
      { 
       //Skip 
       i += 3; 
      } 
      else if (input[i] == '=') 
      { 
       string sHex = input; 
       sHex = sHex.Substring(i + 1, 2); 
       int hex = Convert.ToInt32(sHex, 16); 
       byte b = Convert.ToByte(hex); 
       output.Add(b); 
       i += 3; 
      } 
      else 
      { 
       output.Add((byte)input[i]); 
       i++; 
      } 
     } 
     if (String.IsNullOrEmpty(bodycharset)) 
      return Encoding.UTF8.GetString(output.ToArray()); 
     else 
      return Encoding.GetEncoding(bodycharset).GetString(output.ToArray()); 
    } 

最終輸出：

・ｱ・・・ﾍ・P・ﾈ・・・e・X・g・ﾅ・ｷ・ﾝ・ﾈ・ｳ・・・A・ｱ・・・ﾉ・ｿ・ﾍ 

任何想法來解決它？

Answer 1

試試這個

var str = Decode(inp, "Shift_JIS"); 

或

var str = Decode(inp, "sjis"); 

Answer 2

會有類似於這項工作..？剛剛的Sudu編碼這種快速

Encoding encoding = Encoding.GetEncoding("iso-2022-jp"); 
byte[] bytes = encoding.GetBytes(output); 
string uuEncoded = Convert.ToBase64String(bytes); 

Answer 3

您可以在下面的文章展示了一招：

• C#: Class for decoding Quoted-Printable encoding?

所以，你可以是這樣的：

private static string Decode(string input, string bodycharset) 
{ 
    Attachment attachment = Attachment.CreateAttachmentFromString("", "=?"+bodycharset+"?"+input+"?="); 
    return (attachment.Name); 
} 

您還需要添加：

using System.Net.Mail; 

我希望這有助於:-)

Answer 4

此引用Printable救了我的命。它像一個魅力工作！

public static byte[] FromHex(byte[] hexData) 
    { 
     if (hexData == null) 
     { 
      throw new ArgumentNullException("hexData"); 
     } 

     if (hexData.Length < 2 || (hexData.Length/(double)2 != Math.Floor(hexData.Length/(double)2))) 
     { 
      throw new Exception("Illegal hex data, hex data must be in two bytes pairs, for example: 0F,FF,A3,... ."); 
     } 

     MemoryStream retVal = new MemoryStream(hexData.Length/2); 
     // Loop hex value pairs 
     for (int i = 0; i < hexData.Length; i += 2) 
     { 
      byte[] hexPairInDecimal = new byte[2]; 
      // We need to convert hex char to decimal number, for example F = 15 
      for (int h = 0; h < 2; h++) 
      { 
       if (((char)hexData[i + h]) == '0') 
       { 
        hexPairInDecimal[h] = 0; 
       } 
       else if (((char)hexData[i + h]) == '1') 
       { 
        hexPairInDecimal[h] = 1; 
       } 
       else if (((char)hexData[i + h]) == '2') 
       { 
        hexPairInDecimal[h] = 2; 
       } 
       else if (((char)hexData[i + h]) == '3') 
       { 
        hexPairInDecimal[h] = 3; 
       } 
       else if (((char)hexData[i + h]) == '4') 
       { 
        hexPairInDecimal[h] = 4; 
       } 
       else if (((char)hexData[i + h]) == '5') 
       { 
        hexPairInDecimal[h] = 5; 
       } 
       else if (((char)hexData[i + h]) == '6') 
       { 
        hexPairInDecimal[h] = 6; 
       } 
       else if (((char)hexData[i + h]) == '7') 
       { 
        hexPairInDecimal[h] = 7; 
       } 
       else if (((char)hexData[i + h]) == '8') 
       { 
        hexPairInDecimal[h] = 8; 
       } 
       else if (((char)hexData[i + h]) == '9') 
       { 
        hexPairInDecimal[h] = 9; 
       } 
       else if (((char)hexData[i + h]) == 'A' || ((char)hexData[i + h]) == 'a') 
       { 
        hexPairInDecimal[h] = 10; 
       } 
       else if (((char)hexData[i + h]) == 'B' || ((char)hexData[i + h]) == 'b') 
       { 
        hexPairInDecimal[h] = 11; 
       } 
       else if (((char)hexData[i + h]) == 'C' || ((char)hexData[i + h]) == 'c') 
       { 
        hexPairInDecimal[h] = 12; 
       } 
       else if (((char)hexData[i + h]) == 'D' || ((char)hexData[i + h]) == 'd') 
       { 
        hexPairInDecimal[h] = 13; 
       } 
       else if (((char)hexData[i + h]) == 'E' || ((char)hexData[i + h]) == 'e') 
       { 
        hexPairInDecimal[h] = 14; 
       } 
       else if (((char)hexData[i + h]) == 'F' || ((char)hexData[i + h]) == 'f') 
       { 
        hexPairInDecimal[h] = 15; 
       } 
      } 

      // Join hex 4 bit(left hex cahr) + 4bit(right hex char) in bytes 8 it 
      retVal.WriteByte((byte)((hexPairInDecimal[0] << 4) | hexPairInDecimal[1])); 
     } 

     return retVal.ToArray(); 
    } 
    public static byte[] QuotedPrintableDecode(byte[] data) 
    { 
     if (data == null) 
     { 
      throw new ArgumentNullException("data"); 
     } 

     MemoryStream msRetVal = new MemoryStream(); 
     MemoryStream msSourceStream = new MemoryStream(data); 

     int b = msSourceStream.ReadByte(); 
     while (b > -1) 
     { 
      // Encoded 8-bit byte(=XX) or soft line break(=CRLF) 
      if (b == '=') 
      { 
       byte[] buffer = new byte[2]; 
       int nCount = msSourceStream.Read(buffer, 0, 2); 
       if (nCount == 2) 
       { 
        // Soft line break, line splitted, just skip CRLF 
        if (buffer[0] == '\r' && buffer[1] == '\n') 
        { 
        } 
        // This must be encoded 8-bit byte 
        else 
        { 
         try 
         { 
          msRetVal.Write(FromHex(buffer), 0, 1); 
         } 
         catch 
         { 
          // Illegal value after =, just leave it as is 
          msRetVal.WriteByte((byte)'='); 
          msRetVal.Write(buffer, 0, 2); 
         } 
        } 
       } 
       // Illegal =, just leave as it is 
       else 
       { 
        msRetVal.Write(buffer, 0, nCount); 
       } 
      } 
      // Just write back all other bytes 
      else 
      { 
       msRetVal.WriteByte((byte)b); 
      } 

      // Read next byte 
      b = msSourceStream.ReadByte(); 
     } 

     return msRetVal.ToArray(); 
    } 

Answer 5

晚會晚了，但因爲我有一個解決這個惱人的任務。

我發現下面的鏈接解決方案：http://sourceforge.net/apps/trac/syncmldotnet/wiki/Quoted%20Printable

如果你只需要QP的從上面的鏈接進行解碼，拉你的代碼中，這三項功能：

HexDecoderEvaluator(Match m) 
    HexDecoder(string line) 
    Decode(string encodedText) 

而且然後只是：

var humanReadable = Decode(myQPString); 

無論如何，鏈接提供編碼的功能。

享受