forked from mirror/redis
78 lines
1.2 KiB
Go
78 lines
1.2 KiB
Go
package redis
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"strings"
|
|
)
|
|
|
|
// Redis nil reply, .e.g. when key does not exist.
|
|
var Nil = errorf("redis: nil")
|
|
|
|
// Redis transaction failed.
|
|
var TxFailedErr = errorf("redis: transaction failed")
|
|
|
|
type redisError struct {
|
|
s string
|
|
}
|
|
|
|
func errorf(s string, args ...interface{}) redisError {
|
|
return redisError{s: fmt.Sprintf(s, args...)}
|
|
}
|
|
|
|
func (err redisError) Error() string {
|
|
return err.s
|
|
}
|
|
|
|
func isNetworkError(err error) bool {
|
|
if err == io.EOF {
|
|
return true
|
|
}
|
|
_, ok := err.(net.Error)
|
|
return ok
|
|
}
|
|
|
|
func isBadConn(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
if _, ok := err.(redisError); ok {
|
|
return false
|
|
}
|
|
if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func isMovedError(err error) (moved bool, ask bool, addr string) {
|
|
if _, ok := err.(redisError); !ok {
|
|
return
|
|
}
|
|
|
|
parts := strings.SplitN(err.Error(), " ", 3)
|
|
if len(parts) != 3 {
|
|
return
|
|
}
|
|
|
|
switch parts[0] {
|
|
case "MOVED":
|
|
moved = true
|
|
addr = parts[2]
|
|
case "ASK":
|
|
ask = true
|
|
addr = parts[2]
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// shouldRetry reports whether failed command should be retried.
|
|
func shouldRetry(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
return isNetworkError(err)
|
|
}
|