mirror of https://github.com/go-redis/redis.git
150 lines
2.8 KiB
Go
150 lines
2.8 KiB
Go
package rediscmd
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import (
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"encoding/hex"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/go-redis/redis/v8"
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)
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func CmdString(cmd redis.Cmder) string {
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b := make([]byte, 0, 32)
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b = AppendCmd(b, cmd)
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return String(b)
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}
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func CmdsString(cmds []redis.Cmder) (string, string) {
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const numCmdLimit = 100
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const numNameLimit = 10
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seen := make(map[string]struct{}, numNameLimit)
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unqNames := make([]string, 0, numNameLimit)
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b := make([]byte, 0, 32*len(cmds))
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for i, cmd := range cmds {
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if i > numCmdLimit {
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break
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}
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if i > 0 {
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b = append(b, '\n')
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}
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b = AppendCmd(b, cmd)
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if len(unqNames) >= numNameLimit {
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continue
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}
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name := cmd.FullName()
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if _, ok := seen[name]; !ok {
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seen[name] = struct{}{}
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unqNames = append(unqNames, name)
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}
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}
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summary := strings.Join(unqNames, " ")
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return summary, String(b)
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}
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func AppendCmd(b []byte, cmd redis.Cmder) []byte {
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const numArgLimit = 32
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for i, arg := range cmd.Args() {
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if i > numArgLimit {
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break
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}
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if i > 0 {
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b = append(b, ' ')
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}
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b = appendArg(b, arg)
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}
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if err := cmd.Err(); err != nil {
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b = append(b, ": "...)
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b = append(b, err.Error()...)
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}
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return b
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}
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func appendArg(b []byte, v interface{}) []byte {
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const argLenLimit = 64
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switch v := v.(type) {
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case nil:
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return append(b, "<nil>"...)
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case string:
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if len(v) > argLenLimit {
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v = v[:argLenLimit]
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}
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return appendUTF8String(b, Bytes(v))
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case []byte:
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if len(v) > argLenLimit {
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v = v[:argLenLimit]
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}
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return appendUTF8String(b, v)
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case int:
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return strconv.AppendInt(b, int64(v), 10)
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case int8:
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return strconv.AppendInt(b, int64(v), 10)
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case int16:
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return strconv.AppendInt(b, int64(v), 10)
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case int32:
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return strconv.AppendInt(b, int64(v), 10)
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case int64:
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return strconv.AppendInt(b, v, 10)
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case uint:
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return strconv.AppendUint(b, uint64(v), 10)
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case uint8:
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return strconv.AppendUint(b, uint64(v), 10)
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case uint16:
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return strconv.AppendUint(b, uint64(v), 10)
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case uint32:
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return strconv.AppendUint(b, uint64(v), 10)
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case uint64:
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return strconv.AppendUint(b, v, 10)
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case float32:
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return strconv.AppendFloat(b, float64(v), 'f', -1, 64)
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case float64:
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return strconv.AppendFloat(b, v, 'f', -1, 64)
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case bool:
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if v {
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return append(b, "true"...)
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}
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return append(b, "false"...)
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case time.Time:
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return v.AppendFormat(b, time.RFC3339Nano)
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default:
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return append(b, fmt.Sprint(v)...)
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}
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}
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func appendUTF8String(dst []byte, src []byte) []byte {
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if isSimple(src) {
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dst = append(dst, src...)
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return dst
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}
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s := len(dst)
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dst = append(dst, make([]byte, hex.EncodedLen(len(src)))...)
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hex.Encode(dst[s:], src)
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return dst
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}
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func isSimple(b []byte) bool {
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for _, c := range b {
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if !isSimpleByte(c) {
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return false
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}
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}
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return true
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}
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func isSimpleByte(c byte) bool {
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return c >= 0x21 && c <= 0x7e
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}
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