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Replace regex in escapeMetricName with loop over runes

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Signed-off-by: Brian Akins <brian@akins.org>
This commit is contained in:
Brian Akins 2019-04-02 17:42:39 -04:00
parent 71df5a3198
commit d371436f01
1 changed files with 15 additions and 6 deletions
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21
exporter.go
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@ -21,7 +21,6 @@ import (
"hash/fnv" "hash/fnv"
"io" "io"
"net" "net"
"regexp"
"sort" "sort"
"strconv" "strconv"
"strings" "strings"
@ -44,8 +43,6 @@ const (
) )
var ( var (
illegalCharsRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
hash = fnv.New64a() hash = fnv.New64a()
strBuf bytes.Buffer // Used for hashing. strBuf bytes.Buffer // Used for hashing.
intBuf = make([]byte, 8) intBuf = make([]byte, 8)
@ -284,9 +281,21 @@ func escapeMetricName(metricName string) string {
metricName = "_" + metricName metricName = "_" + metricName
} }
// Replace all illegal metric chars with underscores. out := make([]byte, len(metricName))
metricName = illegalCharsRE.ReplaceAllString(metricName, "_") j := 0
return metricName for _, c := range metricName {
if (c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') {
out[j] = byte(c)
} else {
out[j] = byte('_')
}
j++
}
return string(out[:j])
} }
// Listen handles all events sent to the given channel sequentially. It // Listen handles all events sent to the given channel sequentially. It