/// <summary>
/// Read name value parameters from the given segment
/// </summary>
/// <param name="parameterText"></param>
/// <returns></returns>
public static KeyValuePair <string, string> ReadNameValue(StringSegment parameterText)
{
CharReader reader = new CharReader(parameterText); // Struct. Cheap
int nameStartAt = parameterText.StartIndex;
string name;
string value;
if (!reader.ReadTo(MimeFieldParameters.NameValueSeparator, true))
{
// We ran out of segment. Treat the entire segment as a value with no name
value = reader.Substring(nameStartAt, reader.Position);
return(new KeyValuePair <string, string>(string.Empty, value));
}
name = reader.Substring(nameStartAt, reader.Position - 1);
if (string.IsNullOrEmpty(name))
{
throw new MimeException(MimeError.InvalidFieldParameter);
}
value = ReadValue(ref reader);
return(new KeyValuePair <string, string>(name.TrimStart(), value));
}
static string ReadValue(ref CharReader reader)
{
int startAt = reader.Position + 1;
int endAt;
reader.ReadTo(MimeFieldParameters.NameValueSeparator, true, MailStandard.DQUOTE);
// We're forgiving here
if (reader.Current() == MailStandard.DQUOTE)
{
startAt++;
endAt = reader.Position - 1;
}
else
{
endAt = reader.Position;
}
string value = reader.Substring(startAt, endAt);
if (string.IsNullOrEmpty(value))
{
return(string.Empty);
}
return(UnescapeQuotes(value));
}