www.pudn.com > despop3client_demo.zip > Pop3Component.cs

using System; 
using System.IO; 
using System.Text; 
using System.Text.RegularExpressions; 
 
namespace Pop3 
{ 
	/// 
 
	/// Summary description for Pop3Attachment. 
	/// 
 
	public class Pop3Component 
	{ 
		private string m_contentType; 
		private string m_name; 
		private string m_filename; 
		private string m_contentTransferEncoding; 
		private string m_contentDescription; 
		private string m_contentDisposition; 
		private string m_data; 
		private string m_filePath; 
			 
		public byte[] m_binaryData; 
 
		public string FileExtension 
		{ 
			get  
			{ 
				string extension = null; 
 
				// if file has a filename and the filename 
				// has an extension ... 
 
				if( (m_filename != null) &&  
					Regex.Match(m_filename,@"^.*\..*$").Success) 
				{ 
					// get extension ... 
					extension =   
					Regex.Replace(m_name,@"^[^\.]*\.([^\.]+)$","$1"); 
				} 
 
				// NOTE: return null if extension 
				// not found ... 
				return extension; 
			} 
		} 
 
		public string FileNoExtension 
		{ 
			get  
			{ 
				string extension = null; 
 
				// if file has a filename and the filename 
				// has an extension ... 
 
				if( (m_filename != null) &&  
					Regex.Match(m_filename,@"^.*\..*$").Success) 
				{ 
					// get extension ... 
					extension =   
						Regex.Replace(m_name,@"^([^\.]*)\.[^\.]+$","$1"); 
				} 
 
				// NOTE: return null if extension 
				// not found ... 
				return extension; 
			} 
		} 
 
		public string FilePath 
		{ 
			get { return m_filePath; } 
		} 
 
		public string Filename 
		{ 
			get { return m_filename; } 
		} 
 
		public string ContentType 
		{ 
			get { return m_contentType; } 
		} 
 
		public string Name 
		{ 
			get { return m_name; } 
		} 
 
		public string ContentTransferEncoding 
		{ 
			get { return m_contentTransferEncoding; } 
		} 
 
		public string ContentDescription 
		{ 
			get { return m_contentDescription; } 
		} 
 
		public string ContentDisposition 
		{ 
			get { return m_contentDisposition; } 
		} 
 
		public string Data 
		{ 
			get { return m_data; } 
		} 
 
		public override string ToString() 
		{ 
			return  
				"Content-Type: "+m_contentType + "\r\n" + 
				"Name: "+m_name + "\r\n" + 
				"Filename: "+m_filename+"\r\n"+ 
				"Content-Transfer-Encoding: "+m_contentTransferEncoding+"\r\n"+ 
				"Content-Description: "+m_contentDescription+"\r\n"+ 
				"Content-Disposition: "+m_contentDisposition+"\r\n"+ 
				"Data :" +m_data; 
		} 
 
 
		public bool IsBody 
		{ 
			get  
			{ return 
				(m_contentDisposition==null)?true:false;  
			} 
		} 
 
		public bool IsAttachment 
		{ 
			get  
			{  
				bool ret = false; 
 
				if(m_contentDisposition != null) 
				{ 
					ret = 
						Regex 
						.Match(m_contentDisposition, 
						"^attachment.*$") 
						.Success; 
				} 
 
				return ret; 
			} 
		} 
 
		private void DecodeData() 
		{ 
			// if this data is an attachment ... 
			if( m_contentDisposition != null ) 
			{ 
				 
				// create data folder if it doesn't exist ... 
				if(!Directory.Exists(Pop3Statics.DataFolder)) 
				{ 
					Directory.CreateDirectory(Pop3Statics.DataFolder); 
				} 
 
				m_filePath = Pop3Statics.DataFolder + @"\" + m_filename; 
 
				// if BASE-64 data ... 
				if( (m_contentDisposition.Equals("attachment;")) && 
					(m_contentTransferEncoding.ToUpper() 
					.Equals("BASE64")) ) 
				{ 
					// convert attachment from BASE64 ... 
					m_binaryData =  
						Convert.FromBase64String(m_data.Replace("\n","")); 
 
					BinaryWriter bw = new BinaryWriter( 
						new FileStream(m_filePath,FileMode.Create) ); 
 
					bw.Write(m_binaryData); 
					bw.Flush(); 
					bw.Close(); 
				} 
				else 
				// if PRINTABLE ... 
				if( (m_contentDisposition.Equals("attachment;")) && 
					(m_contentTransferEncoding.ToUpper() 
					.Equals("QUOTED-PRINTABLE")) ) 
				{ 
					using(StreamWriter sw = File.CreateText(m_filePath) ) 
					{ 
						sw.Write(Pop3Statics.FromQuotedPrintable(m_data)); 
						sw.Flush(); 
						sw.Close(); 
					} 
				} 
			} 
		} 
 
		public Pop3Component(string contentType, string data) 
		{ 
			m_contentType = contentType; 
			m_data = data; 
		} 
 
		public Pop3Component(string contentType, string name, string filename,  
			string contentTransferEncoding, string contentDescription, 
			string contentDisposition, string data) 
		{ 
			m_contentType = contentType; 
			m_name = name; 
			m_filename = filename; 
			m_contentTransferEncoding = contentTransferEncoding; 
			m_contentDescription = contentDescription; 
			m_contentDisposition = contentDisposition; 
			m_data = data; 
 
			DecodeData(); 
		} 
	} 
}