protected static bool TryParseTerms(string[] terms, out List <SpfTerm> parsedTerms)
{
parsedTerms = new List <SpfTerm>(terms.Length - 1);
for (int i = 1; i < terms.Length; i++)
{
SpfTerm term;
if (SpfTerm.TryParse(terms[i], out term))
{
parsedTerms.Add(term);
}
else
{
parsedTerms = null;
return(false);
}
}
return(true);
}
internal static bool TryParse(string s, out SpfTerm value)
{
if (String.IsNullOrEmpty(s))
{
value = null;
return(false);
}
#region Parse Mechanism
Regex regex = new Regex(@"^(\s)*(?<qualifier>[~+?-]?)(?<type>[a-z0-9]+)(:(?<domain>[^/]+))?(/(?<prefix>[0-9]+)(/(?<prefix6>[0-9]+))?)?(\s)*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
Match match = regex.Match(s);
if (match.Success)
{
SpfMechanism mechanism = new SpfMechanism();
switch (match.Groups["qualifier"].Value)
{
case "+":
mechanism.Qualifier = SpfQualifier.Pass;
break;
case "-":
mechanism.Qualifier = SpfQualifier.Fail;
break;
case "~":
mechanism.Qualifier = SpfQualifier.SoftFail;
break;
case "?":
mechanism.Qualifier = SpfQualifier.Neutral;
break;
default:
mechanism.Qualifier = SpfQualifier.Pass;
break;
}
SpfMechanismType type;
mechanism.Type = EnumHelper <SpfMechanismType> .TryParse(match.Groups["type"].Value, true, out type) ? type : SpfMechanismType.Unknown;
mechanism.Domain = match.Groups["domain"].Value;
string tmpPrefix = match.Groups["prefix"].Value;
int prefix;
if (!String.IsNullOrEmpty(tmpPrefix) && Int32.TryParse(tmpPrefix, out prefix))
{
mechanism.Prefix = prefix;
}
tmpPrefix = match.Groups["prefix6"].Value;
if (!String.IsNullOrEmpty(tmpPrefix) && Int32.TryParse(tmpPrefix, out prefix))
{
mechanism.Prefix6 = prefix;
}
value = mechanism;
return(true);
}
#endregion
#region Parse Modifier
regex = new Regex(@"^(\s)*(?<type>[a-z]+)=(?<domain>[^\s]+)(\s)*$", RegexOptions.Compiled | RegexOptions.IgnoreCase);
match = regex.Match(s);
if (match.Success)
{
SpfModifier modifier = new SpfModifier();
SpfModifierType type;
modifier.Type = EnumHelper <SpfModifierType> .TryParse(match.Groups["type"].Value, true, out type) ? type : SpfModifierType.Unknown;
modifier.Domain = match.Groups["domain"].Value;
value = modifier;
return(true);
}
#endregion
value = null;
return(false);
}