clair/pkg/strutil/strutil.go

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// Copyright 2017 clair 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 (
"regexp"
set "github.com/deckarep/golang-set"
)
var urlParametersRegexp = regexp.MustCompile(`(\?|\&)([^=]+)\=([^ &]+)`)
func convertToSet(X []string) set.Set {
s := set.NewSet()
for _, x := range X {
s.Add(x)
}
return s
}
func setToStringSlice(s set.Set) []string {
strs := make([]string, 0, s.Cardinality())
for _, str := range s.ToSlice() {
strs = append(strs, str.(string))
}
return strs
}
// Difference returns the strings that are present in X but not in Y.
func Difference(X, Y []string) []string {
x := convertToSet(X)
y := convertToSet(Y)
return setToStringSlice(x.Difference(y))
}
// Intersect returns the strings that are present in both X and Y.
func Intersect(X, Y []string) []string {
x := convertToSet(X)
y := convertToSet(Y)
return setToStringSlice(x.Intersect(y))
}
// CleanURL removes all parameters from an URL.
func CleanURL(str string) string {
return urlParametersRegexp.ReplaceAllString(str, "")
}