private static bool EncodeStatusHeader(int statusCode, DynamicHPackEncoder hpackEncoder, Span <byte> buffer, out int length)
{
if (H2StaticTable.TryGetStatusIndex(statusCode, out var index))
{
// Status codes which exist in the HTTP/2 StaticTable.
return(HPackEncoder.EncodeIndexedHeaderField(index, buffer, out length));
}
else
{
const string name = ":status";
var value = StatusCodes.ToStatusString(statusCode);
return(hpackEncoder.EncodeHeader(buffer, H2StaticTable.Status200, HeaderEncodingHint.Index, name, value, valueEncoding: null, out length));
}
}
private static bool EncodeStatusHeader(int statusCode, DynamicHPackEncoder hpackEncoder, Span <byte> buffer, out int length)
{
switch (statusCode)
{
case 200:
case 204:
case 206:
case 304:
case 400:
case 404:
case 500:
// Status codes which exist in the HTTP/2 StaticTable.
return(HPackEncoder.EncodeIndexedHeaderField(H2StaticTable.GetStatusIndex(statusCode), buffer, out length));
default:
const string name = ":status";
var value = StatusCodes.ToStatusString(statusCode);
return(hpackEncoder.EncodeHeader(buffer, H2StaticTable.Status200, HeaderEncodingHint.Index, name, value, out length));
}
}
private static bool EncodeHeadersCore(DynamicHPackEncoder hpackEncoder, Http2HeadersEnumerator headersEnumerator, Span <byte> buffer, bool throwIfNoneEncoded, out int length)
{
var currentLength = 0;
do
{
var staticTableId = headersEnumerator.HPackStaticTableId;
var name = headersEnumerator.Current.Key;
var value = headersEnumerator.Current.Value;
var valueEncoding =
ReferenceEquals(headersEnumerator.EncodingSelector, KestrelServerOptions.DefaultHeaderEncodingSelector)
? null : headersEnumerator.EncodingSelector(name);
var hint = ResolveHeaderEncodingHint(staticTableId, name);
if (!hpackEncoder.EncodeHeader(
buffer.Slice(currentLength),
staticTableId,
hint,
name,
value,
valueEncoding,
out var headerLength))
{
// If the header wasn't written, and no headers have been written, then the header is too large.
// Throw an error to avoid an infinite loop of attempting to write large header.
if (currentLength == 0 && throwIfNoneEncoded)
{
throw new HPackEncodingException(SR.net_http_hpack_encode_failure);
}
length = currentLength;
return(false);
}
currentLength += headerLength;
}while (headersEnumerator.MoveNext());
length = currentLength;
return(true);
}
