public static ContentDisposition Parse(string disposition)
{
Guard.ArgumentNotNullOrEmptyString(disposition, "disposition");
var offset = 0;
var type = MailBnfHelper.ReadToken(disposition, ref offset);
if (string.IsNullOrEmpty(type))
{
throw new FormatException("Content disposition invalid");
}
var parameters = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
while (MailBnfHelper.SkipCfws(disposition, ref offset))
{
if (disposition[offset++] != ';')
{
throw new FormatException("Content disposition invalid");
}
if (!MailBnfHelper.SkipCfws(disposition, ref offset))
{
break;
}
var key = MailBnfHelper.ReadParameterAttribute(disposition, ref offset);
if (string.IsNullOrEmpty(key))
{
throw new FormatException("Content disposition invalid");
}
if (offset >= disposition.Length || disposition[offset++] != '=')
{
throw new FormatException("Content disposition invalid");
}
if (!MailBnfHelper.SkipCfws(disposition, ref offset))
{
throw new FormatException("Content disposition invalid");
}
var value = disposition[offset] == '"'
? MailBnfHelper.ReadQuotedString(disposition, ref offset, null)
: MailBnfHelper.ReadToken(disposition, ref offset);
if (value == null)
{
throw new FormatException("Content disposition invalid");
}
parameters.Add(key, value);
}
return(new ContentDisposition(disposition, type, parameters));
}
private static IDictionary <string, string> Parse(string type, int offset)
{
var parameters = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
while (MailBnfHelper.SkipCfws(type, ref offset))
{
if (type[offset++] != ';')
{
throw new FormatException("Content type invalid");
}
if (!MailBnfHelper.SkipCfws(type, ref offset))
{
break;
}
var key = MailBnfHelper.ReadParameterAttribute(type, ref offset);
if (string.IsNullOrEmpty(key))
{
throw new FormatException("Content type invalid");
}
if (offset >= type.Length || type[offset++] != '=')
{
throw new FormatException("Content type invalid");
}
if (!MailBnfHelper.SkipCfws(type, ref offset))
{
throw new FormatException("Content type invalid");
}
var value = type[offset] == '"'
? MailBnfHelper.ReadQuotedString(type, ref offset, null)
: MailBnfHelper.ReadToken(type, ref offset);
if (value == null)
{
throw new FormatException("Content type invalid");
}
parameters.Add(key, value);
}
return(parameters);
}
public ContentType(string type)
{
Guard.ArgumentNotNullOrEmptyString(type, "type");
_type = type;
var offset = 0;
_mediaType = MailBnfHelper.ReadToken(_type, ref offset);
if (string.IsNullOrEmpty(_mediaType))
{
throw new FormatException("Content type invalid");
}
offset++;
_subType = MailBnfHelper.ReadToken(_type, ref offset);
if (string.IsNullOrEmpty(_subType))
{
throw new FormatException("Content type invalid");
}
_parameters = Parse(type, offset);
}