public async Task ReadResultSetHeaderAsync(IOBehavior ioBehavior)
{
Reset();
try
{
while (true)
{
var payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
var firstByte = payload.HeaderByte;
if (firstByte == OkPayload.Signature)
{
var ok = OkPayload.Create(payload.Span, Session.SupportsDeprecateEof, Session.SupportsSessionTrack);
RecordsAffected = (RecordsAffected ?? 0) + ok.AffectedRowCount;
LastInsertId = unchecked ((long)ok.LastInsertId);
WarningCount = ok.WarningCount;
if (ok.NewSchema is not null)
{
Connection.Session.DatabaseOverride = ok.NewSchema;
}
ColumnDefinitions = null;
ColumnTypes = null;
State = (ok.ServerStatus & ServerStatus.MoreResultsExist) == 0
? ResultSetState.NoMoreData
: ResultSetState.HasMoreData;
if (State == ResultSetState.NoMoreData)
{
break;
}
}
else if (firstByte == LocalInfilePayload.Signature)
{
try
{
if (!Connection.AllowLoadLocalInfile)
{
throw new NotSupportedException("To use LOAD DATA LOCAL INFILE, set AllowLoadLocalInfile=true in the connection string. See https://fl.vu/mysql-load-data");
}
var localInfile = LocalInfilePayload.Create(payload.Span);
var hasSourcePrefix = localInfile.FileName.StartsWith(MySqlBulkLoader.SourcePrefix, StringComparison.Ordinal);
if (!IsHostVerified(Connection) && !hasSourcePrefix)
{
throw new NotSupportedException("Use SourceStream or SslMode >= VerifyCA for LOAD DATA LOCAL INFILE. See https://fl.vu/mysql-load-data");
}
var source = hasSourcePrefix ?
MySqlBulkLoader.GetAndRemoveSource(localInfile.FileName) :
File.OpenRead(localInfile.FileName);
switch (source)
{
case Stream stream:
var buffer = ArrayPool <byte> .Shared.Rent(1048576);
try
{
int byteCount;
while ((byteCount = await stream.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false)) > 0)
{
payload = new(new ArraySegment <byte>(buffer, 0, byteCount));
await Session.SendReplyAsync(payload, ioBehavior, CancellationToken.None).ConfigureAwait(false);
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
stream.Dispose();
}
break;
case MySqlBulkCopy bulkCopy:
await bulkCopy.SendDataReaderAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
break;
default:
throw new InvalidOperationException("Unsupported Source type: {0}".FormatInvariant(source.GetType().Name));
}
}
catch (Exception ex)
{
// store the exception, to be thrown after reading the response packet from the server
ReadResultSetHeaderException = new("Error during LOAD DATA LOCAL INFILE", ex);
}
await Session.SendReplyAsync(EmptyPayload.Instance, ioBehavior, CancellationToken.None).ConfigureAwait(false);
}
else
{
int ReadColumnCount(ReadOnlySpan <byte> span)
{
var reader = new ByteArrayReader(span);
var columnCount_ = (int)reader.ReadLengthEncodedInteger();
if (reader.BytesRemaining != 0)
{
throw new MySqlException("Unexpected data at end of column_count packet; see https://github.com/mysql-net/MySqlConnector/issues/324");
}
return(columnCount_);
}
var columnCount = ReadColumnCount(payload.Span);
// reserve adequate space to hold a copy of all column definitions (but note that this can be resized below if we guess too small)
Utility.Resize(ref m_columnDefinitionPayloads, columnCount * 96);
ColumnDefinitions = new ColumnDefinitionPayload[columnCount];
ColumnTypes = new MySqlDbType[columnCount];
for (var column = 0; column < ColumnDefinitions.Length; column++)
{
payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
var payloadLength = payload.Span.Length;
// 'Session.ReceiveReplyAsync' reuses a shared buffer; make a copy so that the column definitions can always be safely read at any future point
if (m_columnDefinitionPayloadUsedBytes + payloadLength > m_columnDefinitionPayloads.Count)
{
Utility.Resize(ref m_columnDefinitionPayloads, m_columnDefinitionPayloadUsedBytes + payloadLength);
}
payload.Span.CopyTo(m_columnDefinitionPayloads.Array.AsSpan().Slice(m_columnDefinitionPayloadUsedBytes));
var columnDefinition = ColumnDefinitionPayload.Create(new ResizableArraySegment <byte>(m_columnDefinitionPayloads, m_columnDefinitionPayloadUsedBytes, payloadLength));
ColumnDefinitions[column] = columnDefinition;
ColumnTypes[column] = TypeMapper.ConvertToMySqlDbType(columnDefinition, treatTinyAsBoolean: Connection.TreatTinyAsBoolean, guidFormat: Connection.GuidFormat);
m_columnDefinitionPayloadUsedBytes += payloadLength;
}
if (!Session.SupportsDeprecateEof)
{
payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
EofPayload.Create(payload.Span);
}
if (ColumnDefinitions.Length == (Command?.OutParameters?.Count + 1) && ColumnDefinitions[0].Name == SingleCommandPayloadCreator.OutParameterSentinelColumnName)
{
ContainsCommandParameters = true;
}
LastInsertId = -1;
WarningCount = 0;
State = ResultSetState.ReadResultSetHeader;
break;
}
}
}
catch (Exception ex)
{
ReadResultSetHeaderException = ex;
}
finally
{
BufferState = State;
}
}
