-- 作者：371146381
-- 发布时间：1/3/2008 11:05:00 AM
--
[color=#FF0000][size=4]怎么没人帮我啊,这样吧,我把找到的解码的代码也发下,请高手帮我连接,两个类怎么连起来解码[/size][/color]
using System;
using System.Collections;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;
using System.IO;
using System.Net.Mail;
namespace MailPOP3
{
class Pop3Decode
{
private static Encoding SourceEncoding = null;
private string m_from;
private string m_to;
private string m_cc;
private string m_subject;
private string m_contentType;
private static string m_messageId = null;
private static string tmpFile = Environment.GetEnvironmentVariable("TEMP") + @"\Pop3ClientTmp.msg";
private ArrayList arBytes = new ArrayList();
private bool m_isMultipart = false; private string m_multipartBoundary; private const int m_fromState = 0;
private const int m_toState = 1;
private const int m_subjectState = 2;
private const int m_contentTypeState = 3;
private const int m_contentTransferEncodingType = 4;
private const int m_messageID = 5;
private const int m_charset = 6;
private const int m_CcState = 7; private const int m_notKnownState = -99;
private const int m_endOfHeader = -98;
public string[] m_lines = null;
public byte[] m_content = null;
public string m_boundary = "";
public string m_defCharSet = "";
public string m_charSet = "";
public string m_defContentTransferEncoding = "";
public string m_Description = "";
public string m_Disposition = "";
public string m_Location = "";
public string m_ContentType = "";
public string m_Name = "";
public string m_FileName = "";
public Pop3Decode()
{
//
// TODO: Add constructor logic here
//
} internal static string ParseSubject(string str)
{
return TranslateString(str).Replace("_", " ");
}
internal static string TranslateString(string str)
{
if (str != null && str.Length > 0)
return Regex.Replace(str, @"=\?([^\?]*)\?(\S)\?([^\?]*)\?=", new MatchEvaluator(DecodeSubstringToString));
return "";
} public static System.Text.Encoding GetEncoding(string CharSet)
{
if (Regex.IsMatch(CharSet, ".*ascii.*", RegexOptions.IgnoreCase))
return System.Text.Encoding.Default;
try
{
return System.Text.Encoding.GetEncoding(CharSet);
}
catch
{
return System.Text.Encoding.Default;
}
}
private static string DecodeQuotedPrintableToString(Match qp)
{
string[] arr = qp.Value.TrimStart('=').Split('=');
byte[] res = new byte[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
if (arr[i].Trim() != string.Empty)
{
byte[] buftest = new byte[2]; res[i] = (byte)int.Parse(arr[i].Substring(0, 2), System.Globalization.NumberStyles.HexNumber);
//res[i] = System.Convert.ToByte(arr[i], 16);
}
}
return SourceEncoding.GetString(res).Trim();
} public static string DecodeToDefault(string encoding, byte[] Data, string CharSet)
{
if (Data != null && Pop3Decode.Decode(encoding, Data, CharSet) != null)
{
return
Encoding.Default.GetString(
Encoding.Convert(
GetEncoding(CharSet),
Encoding.Default,
Pop3Decode.Decode(encoding, Data, CharSet)
)
).Trim();
}
return "";
}
public static byte[] Decode(string encoding, byte[] Body, string CharSet)
{
SourceEncoding = GetEncoding(CharSet);
if (Body == null)
return (new byte[0]);
if (encoding.ToLower() == "quoted-printable")
{
//RetVal = Decode(Text, GetEncoding(CharSet));
try
{
string str = TranslateString(SourceEncoding.GetString(Body)).Replace("\r", "");
SourceEncoding = GetEncoding(CharSet); return SourceEncoding.GetBytes(Regex.Replace(str, "(=[0-9A-F][0-9A-F])+", new MatchEvaluator(DecodeQuotedPrintableToString)));
}
catch//(Exception exc)
{ return Decode("base64", Body, CharSet);
}
}
else if (encoding.ToLower() == "base64")
{
try
{
return System.Convert.FromBase64String(GetEncoding(CharSet).GetString(Body).Replace("\n", "").Replace("\r", ""));
}
catch//(Exception exc)
{ return Decode("8bit", Body, CharSet);
}
}
else if (encoding.ToLower() == "8bit")
{
return Body;
}
else if (encoding.Length <= 0)
{
return Decode("quoted-printable", Body, CharSet);
}
return Body;
}
static string HexDecoder(string line)
{ Regex re = new Regex(
"(\\=([0-9A-F][0-9A-F]))",
RegexOptions.IgnoreCase
);
return re.Replace(line, new MatchEvaluator(HexDecoderEvaluator));
} static string DecodeSubstringToString(Match m)
{
SourceEncoding = GetEncoding(m.Groups[1].Value);
if (m.Groups[2].Value.ToLower() == "b")
return SourceEncoding.GetString(System.Convert.FromBase64String(m.Groups[3].Value));
return Regex.Replace(m.Groups[3].Value, "(=[0-9A-F][0-9A-F])+", new MatchEvaluator(DecodeQuotedPrintableToString));
} static string HexDecoderEvaluator(Match m)
{
return ((char)System.Convert.ToByte(m.Groups[2].Value, 16)).ToString();
}
//Pop3Message.cs里面要用到的东西
private string[] m_lineTypeString =
{
"From",
"To",
"Subject",
"Content-Type",
"Content-Transfer-Encoding",
"Message-ID",
"charset",
"Cc"
};
public string MessageId
{
get { return m_messageId != null ? m_messageId : ""; }
set { m_messageId = value; }
}
private int GetHeaderLineType(string line)
{
int lineType = m_notKnownState; for (int i = 0; i < m_lineTypeString.Length; i++)
{
string match = m_lineTypeString[i]; if (Regex.Match(line, "^" + match + ":" + ".*$").Success)
{
lineType = i;
break;
}
else
if (line.Length == 0)
{
lineType = m_endOfHeader;
break;
}
} return lineType;
}
private long ParseHeader(string[] lines)
{
int numberOfLines = lines.Length;
long bodyStart = 0; for (int i = 0; i < numberOfLines; i++)
{
string currentLine = lines[i].Replace("\n", ""); switch (GetHeaderLineType(currentLine))
{
// CharSet:
case m_charset:
m_charSet = Pop3Decode.CharSet(GetDecodeLine(i));
break;
// Message-ID:
case m_messageID:
MessageId = Pop3Decode.MessageID(GetDecodeLine(i));
break;
// From:
case m_fromState:
m_from = Pop3Decode.TranslateString(Pop3Decode.From(GetDecodeLine(i)));
break; // Subject:
case m_subjectState:
m_subject = Pop3Decode.TranslateString(GetDecodeLine(i)).Trim();
i++;
while (lines[i].Replace("\n", "").Replace("\r", "").StartsWith(" "))
m_subject += Pop3Decode.TranslateString(GetDecodeLine(i++).Replace("\n", "").Replace("\r", ""));
m_subject = Pop3Decode.Subject(m_subject);
i--;
break; // To:
case m_toState:
m_to = Pop3Decode.TranslateString(Pop3Decode.To(GetDecodeLine(i)));
break;
//Cc:
case m_CcState:
m_cc = Pop3Decode.TranslateString(Pop3Decode.Cc(GetDecodeLine(i)));
break; // Content-Type
case m_contentTypeState: m_contentType =
Pop3Decode.ContentType(currentLine); if (Pop3Decode.IsCharSet(currentLine))
m_charSet = Pop3Decode.CharSet(currentLine); m_isMultipart = Pop3Decode.IsMultipart(m_contentType); if (m_isMultipart)
{
// if boundary definition is on next
// line ... if (m_contentType
.Substring(m_contentType.Length - 1, 1).
Equals(";"))
{
++i; m_multipartBoundary
= Pop3Decode.
MultipartBoundary(lines[i].
Replace("\n", ""));
}
else
{
// boundary definition is on same
// line as "Content-Type" ... if (Pop3Decode.IsMultipartBoundary(lines[i].Trim()))
m_multipartBoundary =
Pop3Decode
.MultipartBoundary(lines[i].Trim());
else
m_multipartBoundary =
Pop3Decode
.MultipartBoundary(lines[i + 1].Trim());
}
} break; case m_endOfHeader:
bodyStart = i + 1;
break;
} if (bodyStart > 0)
{
break;
}
} return (bodyStart);
}
//Pop3Parse.cs里面要用到的东西
public static string From(string line)
{
return
Pop3Decode.TranslateString(
Regex.Replace(
Pop3Decode.TranslateString(line),
@"^From:[ ]*([^;]+)[ ]*$",
"$1"
)
);
} public static string Subject(string line)
{
return Regex.Replace(
Pop3Decode.TranslateString(line),
@"^Subject:[ ]*([^;]*)[ ]*$",
"$1"
).Replace("_", " ");
} public static string MessageID(string line)
{
return Regex.Replace(
Pop3Decode.TranslateString(line),
@"^Message-ID:[ ]*([^;]+)[ ]*$",
"$1",
RegexOptions.IgnoreCase
);
} public static string To(string line)
{
return
Pop3Decode.TranslateString(
Regex.Replace(
Pop3Decode.TranslateString(line),
@"^To:[ ]*([^;]+)[ ]*$",
"$1"
)
);
} public static string Cc(string line)
{
return
Pop3Decode.TranslateString(
Regex.Replace(
Pop3Decode.TranslateString(line),
@"^Cc:[ ]*([^;]+)[ ]*$",
"$1"
)
);
} public static string ContentType(string line)
{
if (Regex.IsMatch(line, @".*Content-Type: [""]*([^ ;""]*).*"))
return
Pop3Decode.TranslateString(
Regex.Replace(
line.Trim(),
@".*Content-Type: [""]*([^ ;""]*).*",
"$1"
)
);
return "";
}
public static string Name(string line)
{
if (Regex.IsMatch(line, ".*[^e]name[ ]*=[ ]*[\"]*([^\"\r]*).*"))
return Regex.Replace(
Pop3Decode.TranslateString(line),
".*[^e]name[ ]*=[ ]*[\"]*([^\"\r]*).*",
"$1"
);
return "";
} public static string Filename(string line)
{
if (Regex.IsMatch(line, ".*filename[ ]*=[ ]*[\"]*([^\"\r]*).*"))
return Regex.Replace(
Pop3Decode.TranslateString(line),
".*filename[ ]*=[ ]*[\"]*([^\"\r]*).*",
"$1"
);
return "";
}
public static string CharSet(string line)
{
if (IsCharSet(line))
{
return
Regex.Replace(
line,
@".*charset[ ]*=[ ]*[""]*([^;""]*)[""]*.*",
"$1"
).Trim();
}
return "";
}
public static bool IsCharSet(string line)
{
return Regex.IsMatch(line, "[ | ]*charset[ ]*=", RegexOptions.IgnoreCase);
}
public static bool IsMultipart(string line)
{
return
Regex.Match(line, "^multipart/.*").Success;
} public static bool IsMultipartBoundary(string line)
{
return
Regex.Match(line
, ".*boundary[ ]*=[ ]*[\"]*([^\"\n\r]*).*").Success;
} public static string MultipartBoundary(string line)
{
if (IsMultipartBoundary(line))
return
Regex.Replace(line,
".*boundary[ ]*=[ ]*[\"]*([^\"]*).*",
"$1"
);
return "";
}
public static bool IsContentTransferEncoding(string line)
{
return
Regex.IsMatch(
line,
@"^Content-Transfer-Encoding: (.*)$",
RegexOptions.IgnoreCase
);
} public static string ContentTransferEncoding(string line)
{
if (IsContentTransferEncoding(line))
return
Regex.Replace(
line,
@"^Content-Transfer-Encoding: (.*)$",
"$1",
RegexOptions.IgnoreCase
);
return "";
}
//Pop3Component里面要用到的东西
public byte[] Data
{
get { return m_binaryData; }
}
public byte[] m_binaryData;
/* public string GetDecodeDataAsString()
{
return Pop3Decode.DecodeToDefault(ContentTransferEncoding, Data, CharSet);
} public byte[] GetDecodeDataAsByte()
{
return Pop3Decode.Decode(ContentTransferEncoding, Data, CharSet);
}*/
//Pop3Msg.cs里面要用到的东西
public Pop3Decode(byte[] content, string boundary, string CharSet, string defContentTransferEncoding)
{
m_content = new byte[content.Length];
Array.Copy( content, 0, m_content, 0, content.Length);
m_lines = Encoding.Default.GetString(content).Split(new char[] { '\r'});
m_boundary = boundary;
m_defCharSet = CharSet;
m_charSet = CharSet;
m_defContentTransferEncoding = defContentTransferEncoding;
}
public string getFirstContentTransferEncoding(long i)
{
if (m_lines != null && m_lines.Length <= i) return "";
for (; i < m_lines.Length; i++)
if (Pop3Decode.IsContentTransferEncoding(m_lines[i].Trim()))
return Pop3Decode.ContentTransferEncoding(m_lines[i].Trim());
return "";
}
public string getFirstCharSet(long i)
{
if (m_lines != null && m_lines.Length <= i) return "";
for (; i < m_lines.Length; i++)
if (Pop3Decode.IsCharSet(m_lines[i]))
return Pop3Decode.CharSet(m_lines[i]);
return "";
}
public string defContentTransferEncoding
{
get
{
if(m_defContentTransferEncoding==null || m_defContentTransferEncoding.Length<=0)
m_defContentTransferEncoding = getFirstContentTransferEncoding(0);
return m_defContentTransferEncoding;
}
set
{
m_defContentTransferEncoding = value;
}
}
public string defCharSet
{
get
{
if(m_defCharSet==null || m_defCharSet.Length<=0)
m_defCharSet = getFirstCharSet(0);
if(m_defCharSet==null || m_defCharSet.Length<=0)
return m_charSet;
return m_defCharSet;
}
set
{
m_defCharSet = value;
}
}
public long GetNum(long i)
{
if (m_lines != null && m_lines.Length <= i) return i; long iRet = 0;
long j = 0;
foreach (string s in m_lines)
{
if (j == i)
return iRet;
iRet += s.ToCharArray().Length + 1;
j++;
}
return iRet;
}
public byte[] GetLineAsByte(long i)
{
if (m_lines != null && m_lines.Length <= i) return null;
byte[] bData = null;
long StartByte = GetNum(i) + 1;
long Length = GetNum(i + 1) - StartByte - 1;
if (Length < 0) Length = 0;
bData = new byte[Length];
Array.Copy(m_content, StartByte, bData, 0, Length);
return bData;
} public string GetDecodeLine(long i)
{
return Pop3Decode.DecodeToDefault(defContentTransferEncoding, GetLineAsByte(i), defCharSet);
} }
}
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