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//
// System.Web.Mail.MailUtil.cs
//
// Author(s):
// Per Arneng <pt99par@student.bth.se>
//
//
using System;
using System.Text;
namespace System.Web.Mail {
// This class contains some utillity functions
// that doesnt fit in other classes and to keep
// high cohesion on the other classes.
internal class MailUtil {
// determines if a string needs to
// be encoded for transfering over
// the smtp protocol without risking
// that it would be changed.
public static bool NeedEncoding( string str ) {
foreach( char chr in str ) {
int ch = (int)chr;
if( ! ( (ch > 61) && (ch < 127) || (ch>31) && (ch<61) ) ) {
return true;
}
}
return false;
}
// Encodes a string to base4
public static string Base64Encode( string str ) {
return Convert.ToBase64String( Encoding.Default.GetBytes( str ) );
}
// Generate a unique boundary
public static string GenerateBoundary() {
StringBuilder boundary = new StringBuilder("__MONO__Boundary");
boundary.Append("__");
DateTime now = DateTime.Now;
boundary.Append(now.Year);
boundary.Append(now.Month);
boundary.Append(now.Day);
boundary.Append(now.Hour);
boundary.Append(now.Minute);
boundary.Append(now.Second);
boundary.Append(now.Millisecond);
boundary.Append("__");
boundary.Append((new Random()).Next());
boundary.Append("__");
return boundary.ToString();
}
}
}
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