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util.go
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util.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 configcenter
import (
"errors"
"fmt"
"regexp"
)
const (
maxValue = 256
)
//errors
var (
ErrAppEmpty = errors.New("app can not be empty")
ErrServiceTooLong = errors.New("exceeded max value for service name")
)
func GenerateDimension(serviceName, version, appName string) (string, error) {
if appName != "" {
serviceName = serviceName + "@" + appName
} else {
return "", ErrAppEmpty
}
if version != "" {
serviceName = serviceName + "#" + version
}
if len(serviceName) > maxValue {
return "", ErrServiceTooLong
}
dimeExp := `\A([^\$\%\&\+\(/)\[\]\" "\"])*\z`
dimRegexVar, err := regexp.Compile(dimeExp)
if err != nil {
return "", errors.New("not a valid regular expression" + err.Error())
}
if !dimRegexVar.Match([]byte(serviceName)) {
return "", fmt.Errorf("invalid value for dimension info, does not satisfy the regular expression for dimInfo:%s", serviceName)
}
return serviceName, nil
}