98 lines
2.9 KiB
C#
98 lines
2.9 KiB
C#
//
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// System.Web.Mail.UUAttachmentEncoder.cs
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//
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// Author(s):
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// Per Arneng <pt99par@student.bth.se>
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//
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.IO;
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using System.Text;
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namespace System.Web.Mail {
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// a class that handles UU encoding for attachments
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internal class UUAttachmentEncoder : IAttachmentEncoder {
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protected byte[] beginTag;
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protected byte[] endTag;
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protected byte[] endl;
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public UUAttachmentEncoder( int mode , string fileName ) {
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string endlstr = "\r\n";
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beginTag =
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Encoding.ASCII.GetBytes( "begin " + mode + " " + fileName + endlstr);
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endTag =
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Encoding.ASCII.GetBytes( "`" + endlstr + "end" + endlstr );
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endl = Encoding.ASCII.GetBytes( endlstr );
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}
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// uu encodes a stream in to another stream
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public void EncodeStream( Stream ins , Stream outs ) {
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// write the start tag
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outs.Write( beginTag , 0 , beginTag.Length );
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// create the uu transfom and the buffers
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ToUUEncodingTransform tr = new ToUUEncodingTransform();
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byte[] input = new byte[ tr.InputBlockSize ];
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byte[] output = new byte[ tr.OutputBlockSize ];
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while( true ) {
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// read from the stream until no more data is available
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int check = ins.Read( input , 0 , input.Length );
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if( check < 1 ) break;
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// if the read length is not InputBlockSize
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// write a the final block
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if( check == tr.InputBlockSize ) {
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tr.TransformBlock( input , 0 , check , output , 0 );
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outs.Write( output , 0 , output.Length );
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outs.Write( endl , 0 , endl.Length );
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} else {
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byte[] finalBlock = tr.TransformFinalBlock( input , 0 , check );
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outs.Write( finalBlock , 0 , finalBlock.Length );
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outs.Write( endl , 0 , endl.Length );
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break;
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}
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}
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// write the end tag.
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outs.Write( endTag , 0 , endTag.Length );
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}
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}
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}
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