mirror of https://github.com/tidwall/tile38.git
100 lines
2.1 KiB
Go
100 lines
2.1 KiB
Go
package controller
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import (
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"bytes"
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"strings"
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"time"
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"github.com/tidwall/btree"
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"github.com/tidwall/resp"
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"github.com/tidwall/tile38/controller/glob"
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"github.com/tidwall/tile38/controller/server"
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)
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func (c *Controller) cmdKeys(msg *server.Message) (res string, err error) {
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var start = time.Now()
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vs := msg.Values[1:]
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var pattern string
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var ok bool
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if vs, pattern, ok = tokenval(vs); !ok || pattern == "" {
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return "", errInvalidNumberOfArguments
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}
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if len(vs) != 0 {
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return "", errInvalidNumberOfArguments
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}
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var wr = &bytes.Buffer{}
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var once bool
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if msg.OutputType == server.JSON {
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wr.WriteString(`{"ok":true,"keys":[`)
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}
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var everything bool
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var greater bool
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var greaterPivot string
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var vals []resp.Value
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iterator := func(item btree.Item) bool {
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key := item.(*collectionT).Key
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var match bool
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if everything {
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match = true
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} else if greater {
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if !strings.HasPrefix(key, greaterPivot) {
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return false
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}
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match = true
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} else {
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match, _ = glob.Match(pattern, key)
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}
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if match {
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if once {
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if msg.OutputType == server.JSON {
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wr.WriteByte(',')
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}
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} else {
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once = true
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}
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switch msg.OutputType {
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case server.JSON:
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wr.WriteString(jsonString(key))
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case server.RESP:
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vals = append(vals, resp.StringValue(key))
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}
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}
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return true
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}
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if pattern == "*" {
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everything = true
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c.cols.Ascend(iterator)
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} else {
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if strings.HasSuffix(pattern, "*") {
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greaterPivot = pattern[:len(pattern)-1]
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if glob.IsGlob(greaterPivot) {
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greater = false
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c.cols.Ascend(iterator)
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} else {
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greater = true
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c.cols.AscendGreaterOrEqual(&collectionT{Key: greaterPivot}, iterator)
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}
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} else if glob.IsGlob(pattern) {
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greater = false
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c.cols.Ascend(iterator)
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} else {
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greater = true
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greaterPivot = pattern
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c.cols.AscendGreaterOrEqual(&collectionT{Key: greaterPivot}, iterator)
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}
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}
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if msg.OutputType == server.JSON {
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wr.WriteString(`],"elapsed":"` + time.Now().Sub(start).String() + "\"}")
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} else {
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data, err := resp.ArrayValue(vals).MarshalRESP()
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if err != nil {
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return "", err
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}
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wr.Write(data)
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}
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return wr.String(), nil
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}
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