func (cc *clientConn) writeError(e error) error {
var (
m *mysql.SQLError
te *terror.Error
ok bool
)
originErr := errors.Cause(e)
if te, ok = originErr.(*terror.Error); ok {
m = te.ToSQLError()
} else {
m = mysql.NewErrf(mysql.ErrUnknown, e.Error())
}
data := cc.alloc.AllocWithLen(4, 16+len(m.Message))
data = append(data, mysql.ErrHeader)
data = append(data, byte(m.Code), byte(m.Code>>8))
if cc.capability&mysql.ClientProtocol41 > 0 {
data = append(data, '#')
data = append(data, m.State...)
}
data = append(data, m.Message...)
err := cc.writePacket(data)
if err != nil {
return errors.Trace(err)
}
return errors.Trace(cc.flush())
}
// dispatch handles client request based on command which is the first byte of the data.
// It also gets a token from server which is used to limit the concurrently handling clients.
// The most frequently used command is ComQuery.
func (cc *clientConn) dispatch(data []byte) error {
cmd := data[0]
data = data[1:]
cc.lastCmd = hack.String(data)
token := cc.server.getToken()
startTS := time.Now()
defer func() {
cc.server.releaseToken(token)
log.Debugf("[TIME_CMD] %v %d", time.Since(startTS), cmd)
}()
switch cmd {
case mysql.ComSleep:
// TODO: According to mysql document, this command is supposed to be used only internally.
// So it's just a temp fix, not sure if it's done right.
// Investigate this command and write test case later.
return nil
case mysql.ComQuit:
return io.EOF
case mysql.ComQuery: // Most frequently used command.
// For issue 1989
// Input payload may end with byte '\0', we didn't find related mysql document about it, but mysql
// implementation accept that case. So trim the last '\0' here as if the payload an EOF string.
// See http://dev.mysql.com/doc/internals/en/com-query.html
if data[len(data)-1] == 0 {
data = data[:len(data)-1]
}
return cc.handleQuery(hack.String(data))
case mysql.ComPing:
return cc.writeOK()
case mysql.ComInitDB:
log.Debug("init db", hack.String(data))
if err := cc.useDB(hack.String(data)); err != nil {
return errors.Trace(err)
}
return cc.writeOK()
case mysql.ComFieldList:
return cc.handleFieldList(hack.String(data))
case mysql.ComStmtPrepare:
return cc.handleStmtPrepare(hack.String(data))
case mysql.ComStmtExecute:
return cc.handleStmtExecute(data)
case mysql.ComStmtClose:
return cc.handleStmtClose(data)
case mysql.ComStmtSendLongData:
return cc.handleStmtSendLongData(data)
case mysql.ComStmtReset:
return cc.handleStmtReset(data)
case mysql.ComSetOption:
return cc.handleSetOption(data)
default:
return mysql.NewErrf(mysql.ErrUnknown, "command %d not supported now", cmd)
}
}
// dispatch handles client request based on command which is the first byte of the data.
// It also gets a token from server which is used to limit the concurrently handling clients.
// The most frequently used command is ComQuery.
func (cc *clientConn) dispatch(data []byte) error {
cmd := data[0]
data = data[1:]
cc.lastCmd = hack.String(data)
token := cc.server.getToken()
startTS := time.Now()
defer func() {
cc.server.releaseToken(token)
log.Debugf("[TIME_CMD] %v %d", time.Since(startTS), cmd)
}()
switch cmd {
case mysql.ComSleep:
// TODO: According to mysql document, this command is supposed to be used only internally.
// So it's just a temp fix, not sure if it's done right.
// Investigate this command and write test case later.
return nil
case mysql.ComQuit:
return io.EOF
case mysql.ComQuery: // Most frequently used command.
return cc.handleQuery(hack.String(data))
case mysql.ComPing:
return cc.writeOK()
case mysql.ComInitDB:
log.Debug("init db", hack.String(data))
if err := cc.useDB(hack.String(data)); err != nil {
return errors.Trace(err)
}
return cc.writeOK()
case mysql.ComFieldList:
return cc.handleFieldList(hack.String(data))
case mysql.ComStmtPrepare:
return cc.handleStmtPrepare(hack.String(data))
case mysql.ComStmtExecute:
return cc.handleStmtExecute(data)
case mysql.ComStmtClose:
return cc.handleStmtClose(data)
case mysql.ComStmtSendLongData:
return cc.handleStmtSendLongData(data)
case mysql.ComStmtReset:
return cc.handleStmtReset(data)
case mysql.ComSetOption:
return cc.handleSetOption(data)
default:
return mysql.NewErrf(mysql.ErrUnknown, "command %d not supported now", cmd)
}
}
func (cc *clientConn) dispatch(data []byte) error {
cmd := data[0]
data = data[1:]
cc.lastCmd = hack.String(data)
token := cc.server.getToken()
defer func() {
cc.server.releaseToken(token)
}()
switch cmd {
case mysql.ComQuit:
return io.EOF
case mysql.ComQuery:
return cc.handleQuery(hack.String(data))
case mysql.ComPing:
return cc.writeOK()
case mysql.ComInitDB:
log.Debug("init db", hack.String(data))
if err := cc.useDB(hack.String(data)); err != nil {
return errors.Trace(err)
}
return cc.writeOK()
case mysql.ComFieldList:
return cc.handleFieldList(hack.String(data))
case mysql.ComStmtPrepare:
return cc.handleStmtPrepare(hack.String(data))
case mysql.ComStmtExecute:
return cc.handleStmtExecute(data)
case mysql.ComStmtClose:
return cc.handleStmtClose(data)
case mysql.ComStmtSendLongData:
return cc.handleStmtSendLongData(data)
case mysql.ComStmtReset:
return cc.handleStmtReset(data)
default:
return mysql.NewErrf(mysql.ErrUnknown, "command %d not supported now", cmd)
}
}
func (cc *clientConn) writeError(e error) error {
var m *mysql.SQLError
var ok bool
originErr := errors.Cause(e)
if m, ok = originErr.(*mysql.SQLError); !ok {
m = mysql.NewErrf(mysql.ErrUnknown, e.Error())
}
data := make([]byte, 4, 16+len(m.Message))
data = append(data, mysql.ErrHeader)
data = append(data, byte(m.Code), byte(m.Code>>8))
if cc.capability&mysql.ClientProtocol41 > 0 {
data = append(data, '#')
data = append(data, m.State...)
}
data = append(data, m.Message...)
err := cc.writePacket(data)
if err != nil {
return errors.Trace(err)
}
return errors.Trace(cc.flush())
}
func (cc *clientConn) handleStmtExecute(data []byte) (err error) {
if len(data) < 9 {
return mysql.ErrMalformPacket
}
pos := 0
stmtID := binary.LittleEndian.Uint32(data[0:4])
pos += 4
stmt := cc.ctx.GetStatement(int(stmtID))
if stmt == nil {
return mysql.NewErr(mysql.ErrUnknownStmtHandler,
strconv.FormatUint(uint64(stmtID), 10), "stmt_execute")
}
flag := data[pos]
pos++
//now we only support CURSOR_TYPE_NO_CURSOR flag
if flag != 0 {
return mysql.NewErrf(mysql.ErrUnknown, "unsupported flag %d", flag)
}
//skip iteration-count, always 1
pos += 4
var (
nullBitmaps []byte
paramTypes []byte
paramValues []byte
)
numParams := stmt.NumParams()
args := make([]interface{}, numParams)
if numParams > 0 {
nullBitmapLen := (numParams + 7) >> 3
if len(data) < (pos + nullBitmapLen + 1) {
return mysql.ErrMalformPacket
}
nullBitmaps = data[pos : pos+nullBitmapLen]
pos += nullBitmapLen
//new param bound flag
if data[pos] == 1 {
pos++
if len(data) < (pos + (numParams << 1)) {
return mysql.ErrMalformPacket
}
paramTypes = data[pos : pos+(numParams<<1)]
pos += (numParams << 1)
paramValues = data[pos:]
}
err = parseStmtArgs(args, stmt.BoundParams(), nullBitmaps, paramTypes, paramValues)
if err != nil {
return errors.Trace(err)
}
}
rs, err := stmt.Execute(args...)
if err != nil {
return errors.Trace(err)
}
if rs == nil {
return errors.Trace(cc.writeOK())
}
return errors.Trace(cc.writeResultset(rs, true))
}
// ToSQLError convert Error to mysql.SQLError.
func (e *Error) ToSQLError() *mysql.SQLError {
code := e.getMySQLErrorCode()
return mysql.NewErrf(code, e.getMsg())
}
