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regex.go
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regex.go
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// Copyright 2018 The Cloudprober 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 regex provides regex validator for the Cloudprober's
// validator framework.
package regex
import (
"errors"
"fmt"
"regexp"
"github.com/cloudprober/cloudprober/logger"
)
// Validator implements a regex validator.
type Validator struct {
r *regexp.Regexp
l *logger.Logger
}
// Init initializes the regex validator.
// It compiles the regex in the configuration and returns an error if regex
// doesn't compile for some reason.
func (v *Validator) Init(config interface{}, l *logger.Logger) error {
regexStr, ok := config.(string)
if !ok {
return fmt.Errorf("%v is not a valid regex validator config", config)
}
if regexStr == "" {
return errors.New("validator regex string cannot be empty")
}
r, err := regexp.Compile(regexStr)
if err != nil {
return fmt.Errorf("error compiling the given regex (%s): %v", regexStr, err)
}
v.r = r
v.l = l
return nil
}
// Validate the provided responseBody and return true if responseBody matches
// the configured regex.
func (v *Validator) Validate(responseBody []byte) (bool, error) {
return v.r.Match(responseBody), nil
}