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|
package special
import (
"encoding/json"
"errors"
"io"
"os"
"slices"
"strings"
"github.com/Loyalsoldier/geoip/lib"
)
const (
TypeStdout = "stdout"
DescStdout = "Convert data to plaintext CIDR format and output to standard output"
)
func init() {
lib.RegisterOutputConfigCreator(TypeStdout, func(action lib.Action, data json.RawMessage) (lib.OutputConverter, error) {
return NewStdoutFromBytes(action, data)
})
lib.RegisterOutputConverter(TypeStdout, &stdout{
Description: DescStdout,
})
}
type stdout struct {
Type string
Action lib.Action
Description string
Want []string
Exclude []string
OnlyIPType lib.IPType
}
func NewStdout(action lib.Action, opts ...lib.OutputOption) lib.OutputConverter {
s := &stdout{
Type: TypeStdout,
Action: action,
Description: DescStdout,
}
for _, opt := range opts {
if opt != nil {
opt(s)
}
}
return s
}
func WithStdoutWantedList(lists []string) lib.OutputOption {
return func(s lib.OutputConverter) {
s.(*stdout).Want = lists
}
}
func WithStdoutExcludedList(lists []string) lib.OutputOption {
return func(s lib.OutputConverter) {
s.(*stdout).Exclude = lists
}
}
func WithStdoutOnlyIPType(onlyIPType lib.IPType) lib.OutputOption {
return func(s lib.OutputConverter) {
s.(*stdout).OnlyIPType = onlyIPType
}
}
func NewStdoutFromBytes(action lib.Action, data []byte) (lib.OutputConverter, error) {
var tmp struct {
Want []string `json:"wantedList"`
Exclude []string `json:"excludedList"`
OnlyIPType lib.IPType `json:"onlyIPType"`
}
if len(data) > 0 {
if err := json.Unmarshal(data, &tmp); err != nil {
return nil, err
}
}
return NewStdout(
action,
WithStdoutWantedList(tmp.Want),
WithStdoutExcludedList(tmp.Exclude),
WithStdoutOnlyIPType(tmp.OnlyIPType),
), nil
}
func (s *stdout) GetType() string {
return s.Type
}
func (s *stdout) GetAction() lib.Action {
return s.Action
}
func (s *stdout) GetDescription() string {
return s.Description
}
func (s *stdout) Output(container lib.Container) error {
for _, name := range s.filterAndSortList(container) {
entry, found := container.GetEntry(name)
if !found {
continue
}
cidrList, err := s.generateCIDRList(entry)
if err != nil {
continue
}
for _, cidr := range cidrList {
io.WriteString(os.Stdout, cidr+"\n")
}
}
return nil
}
func (s *stdout) filterAndSortList(container lib.Container) []string {
excludeMap := make(map[string]bool)
for _, exclude := range s.Exclude {
if exclude = strings.ToUpper(strings.TrimSpace(exclude)); exclude != "" {
excludeMap[exclude] = true
}
}
wantList := make([]string, 0, len(s.Want))
for _, want := range s.Want {
if want = strings.ToUpper(strings.TrimSpace(want)); want != "" && !excludeMap[want] {
wantList = append(wantList, want)
}
}
if len(wantList) > 0 {
// Sort the list
slices.Sort(wantList)
return wantList
}
list := make([]string, 0, 300)
for entry := range container.Loop() {
name := entry.GetName()
if excludeMap[name] {
continue
}
list = append(list, name)
}
// Sort the list
slices.Sort(list)
return list
}
func (s *stdout) generateCIDRList(entry *lib.Entry) ([]string, error) {
entryList, err := entry.MarshalText(lib.GetIgnoreIPType(s.OnlyIPType))
if err != nil {
return nil, err
}
if len(entryList) == 0 {
return nil, errors.New("empty CIDR list")
}
return entryList, nil
}
|
