/
pm_from_file.go
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/
pm_from_file.go
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// Copyright 2022 Juan Pablo Tosso
//
// 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 operators
import (
"strings"
"github.com/cloudflare/ahocorasick"
"github.com/jptosso/coraza-waf/v2"
)
type pmFromFile struct {
pm *pm
}
func (o *pmFromFile) Init(data string) error {
// Split the data by LF or CRLF
lines := []string{}
sp := strings.Split(data, "\n")
for _, l := range sp {
if len(l) == 0 {
continue
}
l = strings.ReplaceAll(l, "\r", "") // CLF
if l[0] != '#' {
lines = append(lines, strings.ToLower(l))
}
}
o.pm = &pm{
dict: lines,
matcher: ahocorasick.NewStringMatcher(lines),
}
return nil
}
func (o *pmFromFile) Evaluate(tx *coraza.Transaction, value string) bool {
return o.pm.Evaluate(tx, value)
}