public async Task <ResultSet> ReadResultSetHeaderAsync(IOBehavior ioBehavior)
{
// ResultSet can be re-used, so initialize everything
BufferState = ResultSetState.None;
ColumnDefinitions = null;
ColumnTypes = null;
LastInsertId = 0;
RecordsAffected = null;
State = ResultSetState.None;
m_columnDefinitionPayloadUsedBytes = 0;
m_dataLengths = null;
m_dataOffsets = null;
m_readBuffer.Clear();
m_row = null;
m_rowBuffered = null;
m_hasRows = false;
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);
RecordsAffected = (RecordsAffected ?? 0) + ok.AffectedRowCount;
LastInsertId = unchecked ((long)ok.LastInsertId);
if (ok.NewSchema != 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
{
var localInfile = LocalInfilePayload.Create(payload);
if (!IsHostVerified(Connection) &&
!localInfile.FileName.StartsWith(MySqlBulkLoader.StreamPrefix, StringComparison.Ordinal))
{
throw new NotSupportedException("Use SourceStream or SslMode >= VerifyCA for LOAD DATA LOCAL INFILE");
}
using (var stream = localInfile.FileName.StartsWith(MySqlBulkLoader.StreamPrefix, StringComparison.Ordinal) ?
MySqlBulkLoader.GetAndRemoveStream(localInfile.FileName) :
File.OpenRead(localInfile.FileName))
{
byte[] readBuffer = new byte[65536];
int byteCount;
while ((byteCount = await stream.ReadAsync(readBuffer, 0, readBuffer.Length).ConfigureAwait(false)) > 0)
{
payload = new PayloadData(new ArraySegment <byte>(readBuffer, 0, byteCount));
await Session.SendReplyAsync(payload, ioBehavior, CancellationToken.None).ConfigureAwait(false);
}
}
}
catch (Exception ex)
{
// store the exception, to be thrown after reading the response packet from the server
ReadResultSetHeaderException = new MySqlException("Error during LOAD DATA LOCAL INFILE", ex);
}
await Session.SendReplyAsync(EmptyPayload.Create(), ioBehavior, CancellationToken.None).ConfigureAwait(false);
}
else
{
int ReadColumnCount(ArraySegment <byte> arraySegment)
{
var reader = new ByteArrayReader(arraySegment);
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.ArraySegment);
// reserve adequate space to hold a copy of all column definitions (but note that this can be resized below if we guess too small)
Array.Resize(ref m_columnDefinitionPayloads, columnCount * 96);
ColumnDefinitions = new ColumnDefinitionPayload[columnCount];
ColumnTypes = new MySqlDbType[columnCount];
m_dataOffsets = new int[columnCount];
m_dataLengths = new int[columnCount];
for (var column = 0; column < ColumnDefinitions.Length; column++)
{
payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
var arraySegment = payload.ArraySegment;
// '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 + arraySegment.Count > m_columnDefinitionPayloads.Length)
{
Array.Resize(ref m_columnDefinitionPayloads, Math.Max(m_columnDefinitionPayloadUsedBytes + arraySegment.Count, m_columnDefinitionPayloadUsedBytes * 2));
}
Buffer.BlockCopy(arraySegment.Array, arraySegment.Offset, m_columnDefinitionPayloads, m_columnDefinitionPayloadUsedBytes, arraySegment.Count);
var columnDefinition = ColumnDefinitionPayload.Create(new ArraySegment <byte>(m_columnDefinitionPayloads, m_columnDefinitionPayloadUsedBytes, arraySegment.Count));
ColumnDefinitions[column] = columnDefinition;
ColumnTypes[column] = TypeMapper.ConvertToMySqlDbType(columnDefinition, treatTinyAsBoolean: Connection.TreatTinyAsBoolean, guidFormat: Connection.GuidFormat);
m_columnDefinitionPayloadUsedBytes += arraySegment.Count;
}
if (!Session.SupportsDeprecateEof)
{
payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
EofPayload.Create(payload);
}
LastInsertId = -1;
State = ResultSetState.ReadResultSetHeader;
break;
}
}
}
catch (Exception ex)
{
ReadResultSetHeaderException = ex;
}
finally
{
BufferState = State;
}
return(this);
}
public async Task <ResultSet> ReadResultSetHeaderAsync(IOBehavior ioBehavior)
{
// ResultSet can be re-used, so initialize everything
BufferState = ResultSetState.None;
ColumnDefinitions = null;
LastInsertId = 0;
RecordsAffected = 0;
State = ResultSetState.None;
m_dataLengths = null;
m_dataOffsets = null;
m_readBuffer.Clear();
m_row = null;
m_rowBuffered = null;
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);
RecordsAffected += ok.AffectedRowCount;
LastInsertId = ok.LastInsertId;
ColumnDefinitions = null;
State = (ok.ServerStatus & ServerStatus.MoreResultsExist) == 0
? ResultSetState.NoMoreData
: ResultSetState.HasMoreData;
if (State == ResultSetState.NoMoreData)
{
break;
}
}
else if (firstByte == LocalInfilePayload.Signature)
{
try
{
var localInfile = LocalInfilePayload.Create(payload);
using (var stream = localInfile.FileName.StartsWith(MySqlBulkLoader.StreamPrefix, StringComparison.Ordinal) ?
MySqlBulkLoader.GetAndRemoveStream(localInfile.FileName) :
File.OpenRead(localInfile.FileName))
{
byte[] readBuffer = new byte[65536];
int byteCount;
while ((byteCount = await stream.ReadAsync(readBuffer, 0, readBuffer.Length).ConfigureAwait(false)) > 0)
{
payload = new PayloadData(new ArraySegment <byte>(readBuffer, 0, byteCount));
await Session.SendReplyAsync(payload, ioBehavior, CancellationToken.None).ConfigureAwait(false);
}
}
}
catch (Exception ex)
{
// store the exception, to be thrown after reading the response packet from the server
ReadResultSetHeaderException = new MySqlException("Error during LOAD DATA LOCAL INFILE", ex);
}
await Session.SendReplyAsync(EmptyPayload.Create(), ioBehavior, CancellationToken.None).ConfigureAwait(false);
}
else
{
var reader = new ByteArrayReader(payload.ArraySegment);
var columnCount = (int)reader.ReadLengthEncodedInteger();
ColumnDefinitions = new ColumnDefinitionPayload[columnCount];
m_dataOffsets = new int[columnCount];
m_dataLengths = new int[columnCount];
for (var column = 0; column < ColumnDefinitions.Length; column++)
{
payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
ColumnDefinitions[column] = ColumnDefinitionPayload.Create(payload);
}
payload = await Session.ReceiveReplyAsync(ioBehavior, CancellationToken.None).ConfigureAwait(false);
EofPayload.Create(payload);
LastInsertId = -1;
State = ResultSetState.ReadResultSetHeader;
break;
}
}
}
catch (Exception ex)
{
ReadResultSetHeaderException = ex;
}
finally
{
BufferState = State;
}
return(this);
}