// Returns input for decoding failures, as the content might not be encoded.
private static string EncodeAndQuoteMime(string input)
{
string result = input;
bool needsQuotes = false;
// Remove bounding quotes, they'll get re-added later.
if (IsQuoted(result))
{
result = result.Substring(1, result.Length - 2);
needsQuotes = true;
}
if (result.Contains('"')) // Only bounding quotes are allowed.
{
throw new ArgumentException(SR.Format(CultureInfo.InvariantCulture,
SR.net_http_headers_invalid_value, input));
}
else if (HeaderUtilities.ContainsNonAscii(result))
{
needsQuotes = true; // Encoded data must always be quoted, the equals signs are invalid in tokens.
result = EncodeMime(result); // =?utf-8?B?asdfasdfaesdf?=
}
else if (!needsQuotes && HttpRuleParser.GetTokenLength(result, 0) != result.Length)
{
needsQuotes = true;
}
if (needsQuotes)
{
// Re-add quotes "value".
result = "\"" + result + "\"";
}
return(result);
}
private static string EncodeAndQuoteMime(string input)
{
string input1 = input;
bool flag = false;
if (ContentDispositionHeaderValue.IsQuoted((ReadOnlySpan <char>)input1))
{
input1 = input1.Substring(1, input1.Length - 2);
flag = true;
}
if (input1.Contains('"'))
{
throw new ArgumentException(SR.Format((IFormatProvider)CultureInfo.InvariantCulture, SR.net_http_headers_invalid_value, (object)input));
}
if (HeaderUtilities.ContainsNonAscii(input1))
{
flag = true;
input1 = ContentDispositionHeaderValue.EncodeMime(input1);
}
else if (!flag && HttpRuleParser.GetTokenLength(input1, 0) != input1.Length)
{
flag = true;
}
if (flag)
{
input1 = "\"" + input1 + "\"";
}
return(input1);
}