正在解码带引号的可打印消息
本文关键字：打印 消息 解码 | 更新日期: 2023-09-27 18:19:55
Iam在解码日语消息时遇到问题，最终输出似乎是一个垃圾值。
编码ISO-2022-JP引用可打印消息：
用于解码引用可打印文件的代码：
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());
}
最终输出：
・ｱ・・・ﾍ・P・ﾈ・・・e・X・g・ﾅ・ｷ・ﾝ・ﾈ・ｳ・・・A・ｱ・・・ﾉ・ｿ・ﾍ
有什么解决办法吗？。
尝试这个
var str = Decode(inp, "Shift_JIS");
或
var str = Decode(inp, "sjis");
类似的东西会起作用吗。。？只是苏都编码了这种快速
Encoding encoding = Encoding.GetEncoding("iso-2022-jp");
byte[] bytes = encoding.GetBytes(output);
string uuEncoded = Convert.ToBase64String(bytes);
您可以使用以下文章中演示的技巧：
- C#：用于解码引用的可打印编码的类
所以你可以是这样的：
private static string Decode(string input, string bodycharset)
{
Attachment attachment = Attachment.CreateAttachmentFromString("", "=?"+bodycharset+"?"+input+"?=");
return (attachment.Name);
}
您还需要添加：
using System.Net.Mail;
我希望这能有所帮助：-）
派对迟到了，但我已经为这个烦人的任务找到了解决方案。
我在以下链接中找到了解决方案：http://sourceforge.net/apps/trac/syncmldotnet/wiki/Quoted%20Printable
如果你只需要解码QP，请从上面的链接中提取以下三个函数：
HexDecoderEvaluator(Match m)
HexDecoder(string line)
Decode(string encodedText)
然后只是：
var humanReadable = Decode(myQPString);
无论如何，链接也提供了编码功能。
享受
您可以使用perl:将消息写入文件并在终端中解码
cat message_in_file.eml | perl -MMIME::QuotedPrint -ne 'print decode_qp($_)'
这个引用的可打印文件救了我的命。它就像一个符咒！
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();
}