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words.go
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words.go
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package filter
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"github.com/ffuf/ffuf/v2/pkg/ffuf"
)
type WordFilter struct {
Value []ffuf.ValueRange
}
func NewWordFilter(value string) (ffuf.FilterProvider, error) {
var intranges []ffuf.ValueRange
for _, sv := range strings.Split(value, ",") {
vr, err := ffuf.ValueRangeFromString(sv)
if err != nil {
return &WordFilter{}, fmt.Errorf("Word filter or matcher (-fw / -mw): invalid value: %s", sv)
}
intranges = append(intranges, vr)
}
return &WordFilter{Value: intranges}, nil
}
func (f *WordFilter) MarshalJSON() ([]byte, error) {
value := make([]string, 0)
for _, v := range f.Value {
if v.Min == v.Max {
value = append(value, strconv.FormatInt(v.Min, 10))
} else {
value = append(value, fmt.Sprintf("%d-%d", v.Min, v.Max))
}
}
return json.Marshal(&struct {
Value string `json:"value"`
}{
Value: strings.Join(value, ","),
})
}
func (f *WordFilter) Filter(response *ffuf.Response) (bool, error) {
wordsSize := len(strings.Split(string(response.Data), " "))
for _, iv := range f.Value {
if iv.Min <= int64(wordsSize) && int64(wordsSize) <= iv.Max {
return true, nil
}
}
return false, nil
}
func (f *WordFilter) Repr() string {
var strval []string
for _, iv := range f.Value {
if iv.Min == iv.Max {
strval = append(strval, strconv.Itoa(int(iv.Min)))
} else {
strval = append(strval, strconv.Itoa(int(iv.Min))+"-"+strconv.Itoa(int(iv.Max)))
}
}
return strings.Join(strval, ",")
}
func (f *WordFilter) ReprVerbose() string {
return fmt.Sprintf("Response words: %s", f.Repr())
}