www.pudn.com > despop3client_demo.zip > Pop3Parse.cs

using System; 
using System.Text.RegularExpressions; 
 
namespace Pop3 
{ 
	/// 
 
	/// Summary description for Pop3ParseMessage. 
	/// 
 
	public class Pop3Parse 
	{ 
		private static string[] m_lineUpperTypeString = 
		{  
			"From", 
			"To", 
			"Subject", 
			"Content-Type" 
		}; 
 
		private static string[] m_lineSubTypeString = 
		{ 
			"Content-Type", 
			"Content-Transfer-Encoding", 
			"Content-Description", 
			"Content-Disposition" 
		}; 
 
		private static string[] m_nextLineTypeString = 
		{ 
			"name", 
			"filename" 
		}; 
 
		// Mapping to lineSubTypeString ... 
		public const int ContentTypeType = 0; 
		public const int ContentTransferEncodingType = 1; 
		public const int ContentDescriptionType = 2; 
		public const int ContentDispositionType = 3; 
 
		// Mapping to nextLineTypeString ... 
		public const int NameType = 0; 
		public const int FilenameType = 1; 
 
		// Non-string mappers ... 
		public const int UnknownType = -99; 
		public const int EndOfHeader = -98; 
		public const int MultipartBoundaryFound = -97; 
		public const int ComponetsDone = -96; 
 
		public static string[] LineUpperTypeString 
		{ 
			get { return m_lineUpperTypeString; } 
		} 
 
		public static string[] LineSubTypeString 
		{ 
			get { return m_lineSubTypeString; } 
		} 
 
		public static string[] NextLineTypeString 
		{ 
			get { return m_nextLineTypeString; } 
		} 
 
		public static string From(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^From:.*[ |<]([a-z|A-Z|0-9|\.|\-|_]+@[a-z|A-Z|0-9|\.|\-|_]+).*$" 
				,"$1"); 
		} 
 
		public static string Subject(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^Subject: (.*)$" 
				,"$1"); 
		} 
 
		public static string To(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^To:.*[ |<]([a-z|A-Z|0-9|\.|\-|_]+@[a-z|A-Z|0-9|\.|\-|_]+).*$" 
				,"$1"); 
		} 
 
		public static string ContentType(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^Content-Type: (.*)$" 
				,"$1"); 
		} 
 
		public static string ContentTransferEncoding(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^Content-Transfer-Encoding: (.*)$" 
				,"$1"); 
		} 
 
		public static string ContentDescription(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^Content-Description: (.*)$" 
				,"$1"); 
		} 
 
		public static string ContentDisposition(string line) 
		{ 
			return 
				Regex.Replace(line 
				,@"^Content-Disposition: (.*)$" 
				,"$1"); 
		} 
 
		public static bool IsMultipart(string line) 
		{ 
			return 
				Regex.Match(line,"^multipart/.*").Success; 
		} 
 
		public static string MultipartBoundary(string line) 
		{ 
			return 
				Regex.Replace(line 
				,"^.*boundary=[\"]*([^\"]*).*$" 
				,"$1"); 
		} 
 
		public static string Name(string line) 
		{ 
			return Regex.Replace(line, 
				"^[ |	]+name=[\"]*([^\"]*).*$","$1"); 
		} 
 
		public static string Filename(string line) 
		{ 
			return Regex.Replace(line, 
				"^[ |	]+filename=[\"]*([^\"]*).*$","$1"); 
		} 
 
		public static int GetSubHeaderNextLineType(string line) 
		{ 
			int lineType = Pop3Parse.UnknownType; 
 
			for(int i=0; i