89 lines
2.5 KiB
C#
89 lines
2.5 KiB
C#
//
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// System.Web.Mail.MailUtil.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.Text;
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namespace System.Web.Mail {
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// This class contains some utillity functions
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// that doesnt fit in other classes and to keep
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// high cohesion on the other classes.
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internal class MailUtil {
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// determines if a string needs to
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// be encoded for transfering over
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// the smtp protocol without risking
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// that it would be changed.
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public static bool NeedEncoding( string str ) {
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foreach( char chr in str ) {
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int ch = (int)chr;
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if( ! ( (ch > 61) && (ch < 127) || (ch>31) && (ch<61) ) ) {
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return true;
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}
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}
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return false;
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}
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// Encodes a string to base4
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public static string Base64Encode( string str ) {
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return Convert.ToBase64String( Encoding.Default.GetBytes( str ) );
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}
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// Generate a unique boundary
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public static string GenerateBoundary() {
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StringBuilder boundary = new StringBuilder("__MONO__Boundary");
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boundary.Append("__");
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DateTime now = DateTime.Now;
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boundary.Append(now.Year);
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boundary.Append(now.Month);
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boundary.Append(now.Day);
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boundary.Append(now.Hour);
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boundary.Append(now.Minute);
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boundary.Append(now.Second);
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boundary.Append(now.Millisecond);
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boundary.Append("__");
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boundary.Append((new Random()).Next());
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boundary.Append("__");
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return boundary.ToString();
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}
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}
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}
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