mirror of https://github.com/prometheus/prometheus
53 lines
1.9 KiB
Go
53 lines
1.9 KiB
Go
// Copyright 2013 The Prometheus Authors
|
|
// 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 strutil
|
|
|
|
import (
|
|
"fmt"
|
|
"net/url"
|
|
"regexp"
|
|
"strings"
|
|
)
|
|
|
|
var (
|
|
invalidLabelCharRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
|
|
)
|
|
|
|
// TableLinkForExpression creates an escaped relative link to the table view of
|
|
// the provided expression.
|
|
func TableLinkForExpression(expr string) string {
|
|
// url.QueryEscape percent-escapes everything except spaces, for which it
|
|
// uses "+". However, in the non-query part of a URI, only percent-escaped
|
|
// spaces are legal, so we need to manually replace "+" with "%20" after
|
|
// query-escaping the string.
|
|
//
|
|
// See also:
|
|
// http://stackoverflow.com/questions/1634271/url-encoding-the-space-character-or-20.
|
|
urlData := url.QueryEscape(fmt.Sprintf(`[{"expr":%q,"tab":1}]`, expr))
|
|
return fmt.Sprintf("/graph#%s", strings.Replace(urlData, "+", "%20", -1))
|
|
}
|
|
|
|
// GraphLinkForExpression creates an escaped relative link to the graph view of
|
|
// the provided expression.
|
|
func GraphLinkForExpression(expr string) string {
|
|
urlData := url.QueryEscape(fmt.Sprintf(`[{"expr":%q,"tab":0}]`, expr))
|
|
return fmt.Sprintf("/graph#%s", strings.Replace(urlData, "+", "%20", -1))
|
|
}
|
|
|
|
// SanitizeLabelName replaces anything that doesn't match
|
|
// client_label.LabelNameRE with an underscore.
|
|
func SanitizeLabelName(name string) string {
|
|
return invalidLabelCharRE.ReplaceAllString(name, "_")
|
|
}
|