88 lines
2.0 KiB
Go
88 lines
2.0 KiB
Go
// Copyright 2018 Prometheus Team
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package parse
|
|
|
|
import (
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/prometheus/prometheus/pkg/labels"
|
|
)
|
|
|
|
var (
|
|
re = regexp.MustCompile(`(?:\s?)(\w+)(=|=~|!=|!~)(?:\"([^"=~!]+)\"|([^"=~!]+)|\"\")`)
|
|
typeMap = map[string]labels.MatchType{
|
|
"=": labels.MatchEqual,
|
|
"!=": labels.MatchNotEqual,
|
|
"=~": labels.MatchRegexp,
|
|
"!~": labels.MatchNotRegexp,
|
|
}
|
|
)
|
|
|
|
func Matchers(s string) ([]*labels.Matcher, error) {
|
|
matchers := []*labels.Matcher{}
|
|
if strings.HasPrefix(s, "{") {
|
|
s = s[1:]
|
|
}
|
|
if strings.HasSuffix(s, "}") {
|
|
s = s[:len(s)-1]
|
|
}
|
|
|
|
for _, toParse := range strings.Split(s, ",") {
|
|
m, err := Matcher(toParse)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
matchers = append(matchers, m)
|
|
}
|
|
return matchers, nil
|
|
}
|
|
|
|
func Matcher(s string) (*labels.Matcher, error) {
|
|
name, value, matchType, err := Input(s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
m, err := labels.NewMatcher(matchType, name, value)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return m, nil
|
|
}
|
|
|
|
func Input(s string) (name, value string, matchType labels.MatchType, err error) {
|
|
ms := re.FindStringSubmatch(s)
|
|
if len(ms) < 4 {
|
|
return "", "", labels.MatchEqual, fmt.Errorf("bad matcher format: %s", s)
|
|
}
|
|
|
|
var prs bool
|
|
name = ms[1]
|
|
matchType, prs = typeMap[ms[2]]
|
|
|
|
if ms[3] != "" {
|
|
value = ms[3]
|
|
} else {
|
|
value = ms[4]
|
|
}
|
|
|
|
if name == "" || !prs {
|
|
return "", "", labels.MatchEqual, fmt.Errorf("failed to parse")
|
|
}
|
|
|
|
return name, value, matchType, nil
|
|
}
|