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38 lines
752 B
Go
38 lines
752 B
Go
package string
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import (
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"github.com/nalgeon/redka/internal/core"
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"github.com/nalgeon/redka/internal/redis"
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)
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// Strlen returns the length of a string value.
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// STRLEN key
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// https://redis.io/commands/strlen
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type Strlen struct {
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redis.BaseCmd
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key string
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}
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func ParseStrlen(b redis.BaseCmd) (Strlen, error) {
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cmd := Strlen{BaseCmd: b}
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if len(cmd.Args()) != 1 {
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return Strlen{}, redis.ErrInvalidArgNum
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}
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cmd.key = string(cmd.Args()[0])
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return cmd, nil
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}
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func (cmd Strlen) Run(w redis.Writer, red redis.Redka) (any, error) {
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val, err := red.Str().Get(cmd.key)
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if err == core.ErrNotFound {
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w.WriteInt(0)
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return 0, nil
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}
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if err != nil {
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w.WriteError(cmd.Error(err))
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return nil, err
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}
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w.WriteInt(len(val))
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return len(val), nil
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}
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