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package goredis
import (
"bufio"
"fmt"
"io"
"net"
"sync/atomic"
"time"
)
type sizeWriter int64
func (s *sizeWriter) Write(p []byte) (int, error) {
*s += sizeWriter(len(p))
return len(p), nil
}
type Conn struct {
c net.Conn
respReader *RespReader
respWriter *RespWriter
totalReadSize sizeWriter
totalWriteSize sizeWriter
closed int32
}
func Connect(addr string) (*Conn, error) {
return ConnectWithSize(addr, 1024, 1024)
}
func ConnectWithSize(addr string, readSize int, writeSize int) (*Conn, error) {
conn, err := net.Dial(getProto(addr), addr)
if err != nil {
return nil, err
}
return NewConnWithSize(conn, readSize, writeSize)
}
func NewConn(conn net.Conn) (*Conn, error) {
return NewConnWithSize(conn, 1024, 1024)
}
func NewConnWithSize(conn net.Conn, readSize int, writeSize int) (*Conn, error) {
c := new(Conn)
c.c = conn
br := bufio.NewReaderSize(io.TeeReader(c.c, &c.totalReadSize), readSize)
bw := bufio.NewWriterSize(io.MultiWriter(c.c, &c.totalWriteSize), writeSize)
c.respReader = NewRespReader(br)
c.respWriter = NewRespWriter(bw)
atomic.StoreInt32(&c.closed, 0)
return c, nil
}
func (c *Conn) Close() {
if atomic.LoadInt32(&c.closed) == 1 {
return
}
c.c.Close()
atomic.StoreInt32(&c.closed, 1)
}
func (c *Conn) isClosed() bool {
return atomic.LoadInt32(&c.closed) == 1
}
func (c *Conn) GetTotalReadSize() int64 {
return int64(c.totalReadSize)
}
func (c *Conn) GetTotalWriteSize() int64 {
return int64(c.totalWriteSize)
}
func (c *Conn) SetReadDeadline(t time.Time) error {
return c.c.SetReadDeadline(t)
}
func (c *Conn) SetWriteDeadline(t time.Time) error {
return c.c.SetWriteDeadline(t)
}
func (c *Conn) RemoteAddr() net.Addr {
return c.c.RemoteAddr()
}
func (c *Conn) LocalAddr() net.Addr {
return c.c.LocalAddr()
}
// Send RESP command and receive the reply
func (c *Conn) Do(cmd string, args ...interface{}) (interface{}, error) {
if err := c.Send(cmd, args...); err != nil {
return nil, err
}
return c.Receive()
}
// Send RESP command
func (c *Conn) Send(cmd string, args ...interface{}) error {
if err := c.respWriter.WriteCommand(cmd, args...); err != nil {
c.Close()
return err
}
return nil
}
// Receive RESP reply
func (c *Conn) Receive() (interface{}, error) {
if reply, err := c.respReader.Parse(); err != nil {
c.Close()
return nil, err
} else {
if e, ok := reply.(Error); ok {
return reply, e
} else {
return reply, nil
}
}
}
// Receive RESP bulk string reply into writer w
func (c *Conn) ReceiveBulkTo(w io.Writer) error {
err := c.respReader.ParseBulkTo(w)
if err != nil {
if _, ok := err.(Error); !ok {
c.Close()
}
}
return err
}
// Receive RESP command request, must array of bulk stirng
func (c *Conn) ReceiveRequest() ([][]byte, error) {
return c.respReader.ParseRequest()
}
// Send RESP value, must be string, int64, []byte, error, nil or []interface{}
func (c *Conn) SendValue(v interface{}) error {
switch v := v.(type) {
case string:
return c.respWriter.FlushString(v)
case int64:
return c.respWriter.FlushInteger(v)
case []byte:
return c.respWriter.FlushBulk(v)
case []interface{}:
return c.respWriter.FlushArray(v)
case error:
return c.respWriter.FlushError(v)
case nil:
return c.respWriter.FlushBulk(nil)
default:
return fmt.Errorf("invalid type %T for send RESP value", v)
}
}
func (c *Client) newConn(addr string, pass string) (*Conn, error) {
co, err := ConnectWithSize(addr, c.readBufferSize, c.writeBufferSize)
if err != nil {
return nil, err
}
if len(pass) > 0 {
_, err = co.Do("AUTH", pass)
if err != nil {
co.Close()
return nil, err
}
}
return co, nil
}
|
