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pm_from_dataset.go
37 lines (28 loc) · 1.01 KB
/
pm_from_dataset.go
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// Copyright 2022 Juan Pablo Tosso and the OWASP Coraza contributors
// SPDX-License-Identifier: Apache-2.0
//go:build !coraza.disabled_operators.pmFromDataset
package operators
import (
"fmt"
ahocorasick "github.com/petar-dambovaliev/aho-corasick"
"github.com/lixf311/coraza/v3/experimental/plugins/plugintypes"
"github.com/lixf311/coraza/v3/internal/memoize"
)
func newPMFromDataset(options plugintypes.OperatorOptions) (plugintypes.Operator, error) {
data := options.Arguments
dataset, ok := options.Datasets[data]
if !ok {
return nil, fmt.Errorf("dataset %q not found", data)
}
builder := ahocorasick.NewAhoCorasickBuilder(ahocorasick.Opts{
AsciiCaseInsensitive: true,
MatchOnlyWholeWords: false,
MatchKind: ahocorasick.LeftMostLongestMatch,
DFA: true,
})
m, _ := memoize.Do(data, func() (interface{}, error) { return builder.Build(dataset), nil })
return &pm{matcher: m.(ahocorasick.AhoCorasick)}, nil
}
func init() {
Register("pmFromDataset", newPMFromDataset)
}