private static bool Encode(Http3HeadersEnumerator enumerator, Span <byte> buffer, bool throwIfNoneEncoded, ref int totalHeaderSize, out int length)
{
length = 0;
do
{
var current = enumerator.Current;
var valueEncoding = ReferenceEquals(enumerator.EncodingSelector, KestrelServerOptions.DefaultHeaderEncodingSelector)
? null : enumerator.EncodingSelector(current.Key);
if (!QPackEncoder.EncodeLiteralHeaderFieldWithoutNameReference(current.Key, current.Value, valueEncoding, buffer.Slice(length), out int headerLength))
{
if (length == 0 && throwIfNoneEncoded)
{
throw new QPackEncodingException("TODO sync with corefx" /* CoreStrings.HPackErrorNotEnoughBuffer */);
}
return(false);
}
// https://quicwg.org/base-drafts/draft-ietf-quic-http.html#section-4.1.1.3
totalHeaderSize += HeaderField.GetLength(current.Key.Length, current.Value.Length);
length += headerLength;
} while (enumerator.MoveNext());
return(true);
}
public static bool BeginEncode(Http3HeadersEnumerator enumerator, Span <byte> buffer, ref int totalHeaderSize, out int length)
{
bool hasValue = enumerator.MoveNext();
Debug.Assert(hasValue == true);
buffer[0] = 0;
buffer[1] = 0;
bool doneEncode = Encode(enumerator, buffer.Slice(2), ref totalHeaderSize, out length);
// Add two for the first two bytes.
length += 2;
return(doneEncode);
}
public static bool BeginEncode(int statusCode, Http3HeadersEnumerator enumerator, Span <byte> buffer, ref int totalHeaderSize, out int length)
{
bool hasValue = enumerator.MoveNext();
Debug.Assert(hasValue == true);
// https://quicwg.org/base-drafts/draft-ietf-quic-qpack.html#header-prefix
buffer[0] = 0;
buffer[1] = 0;
int statusCodeLength = EncodeStatusCode(statusCode, buffer.Slice(2));
totalHeaderSize += 42; // name (:status) + value (xxx) + overhead (32)
bool done = Encode(enumerator, buffer.Slice(statusCodeLength + 2), throwIfNoneEncoded: false, ref totalHeaderSize, out int headersLength);
length = statusCodeLength + headersLength + 2;
return(done);
}
public static bool Encode(Http3HeadersEnumerator enumerator, Span <byte> buffer, ref int totalHeaderSize, out int length)
{
return(Encode(enumerator, buffer, throwIfNoneEncoded: true, ref totalHeaderSize, out length));
}