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package plaintext
import (
"bufio"
"fmt"
"io"
"strings"
"github.com/Loyalsoldier/geoip/lib"
"github.com/tidwall/gjson"
"gopkg.in/yaml.v2"
)
type textIn struct {
Type string
Action lib.Action
Description string
Name string
URI string
IPOrCIDR []string
InputDir string
Want map[string]bool
OnlyIPType lib.IPType
JSONPath []string
RemovePrefixesInLine []string
RemoveSuffixesInLine []string
}
func (t *textIn) scanFile(reader io.Reader, entry *lib.Entry) error {
var err error
switch t.Type {
case TypeTextIn:
err = t.scanFileForTextIn(reader, entry)
case TypeJSONIn:
err = t.scanFileForJSONIn(reader, entry)
case TypeClashRuleSetClassicalIn:
err = t.scanFileForClashClassicalRuleSetIn(reader, entry)
case TypeClashRuleSetIPCIDRIn:
err = t.scanFileForClashIPCIDRRuleSetIn(reader, entry)
case TypeSurgeRuleSetIn:
err = t.scanFileForSurgeRuleSetIn(reader, entry)
default:
return lib.ErrNotSupportedFormat
}
return err
}
func (t *textIn) scanFileForTextIn(reader io.Reader, entry *lib.Entry) error {
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
line := scanner.Text()
line, _, _ = strings.Cut(line, "#")
line, _, _ = strings.Cut(line, "//")
line, _, _ = strings.Cut(line, "/*")
line = strings.TrimSpace(line)
if line == "" {
continue
}
line = strings.ToLower(line)
for _, prefix := range t.RemovePrefixesInLine {
line = strings.TrimSpace(strings.TrimPrefix(line, strings.ToLower(strings.TrimSpace(prefix))))
}
for _, suffix := range t.RemoveSuffixesInLine {
line = strings.TrimSpace(strings.TrimSuffix(line, strings.ToLower(strings.TrimSpace(suffix))))
}
line = strings.TrimSpace(line)
if line == "" {
continue
}
if err := entry.AddPrefix(line); err != nil {
return err
}
}
if err := scanner.Err(); err != nil {
return err
}
return nil
}
func (t *textIn) readClashRuleSetYAMLFile(reader io.Reader) ([]string, error) {
var payload struct {
Payload []string `yaml:"payload"`
}
data, err := io.ReadAll(reader)
if err != nil {
return nil, err
}
if err := yaml.Unmarshal(data, &payload); err != nil {
return nil, err
}
return payload.Payload, nil
}
func (t *textIn) scanFileForClashIPCIDRRuleSetIn(reader io.Reader, entry *lib.Entry) error {
payload, err := t.readClashRuleSetYAMLFile(reader)
if err != nil {
return err
}
for _, cidrStr := range payload {
cidrStr = strings.TrimSpace(cidrStr)
if cidrStr == "" {
continue
}
if err := entry.AddPrefix(cidrStr); err != nil {
return err
}
}
return nil
}
func (t *textIn) scanFileForClashClassicalRuleSetIn(reader io.Reader, entry *lib.Entry) error {
payload, err := t.readClashRuleSetYAMLFile(reader)
if err != nil {
return err
}
for _, line := range payload {
line = strings.ToLower(strings.TrimSpace(line))
if line == "" {
continue
}
// Examples:
// IP-CIDR,162.208.16.0/24
// IP-CIDR6,2a0b:e40:1::/48
// IP-CIDR,162.208.16.0/24,no-resolve
// IP-CIDR6,2a0b:e40:1::/48,no-resolve
if strings.HasPrefix(line, "ip-cidr,") || strings.HasPrefix(line, "ip-cidr6,") {
parts := strings.Split(line, ",")
if len(parts) < 2 {
continue
}
line = strings.TrimSpace(parts[1])
if line == "" {
continue
}
if err := entry.AddPrefix(line); err != nil {
return err
}
}
}
return nil
}
func (t *textIn) scanFileForSurgeRuleSetIn(reader io.Reader, entry *lib.Entry) error {
scanner := bufio.NewScanner(reader)
for scanner.Scan() {
line := scanner.Text()
line, _, _ = strings.Cut(line, "#")
line, _, _ = strings.Cut(line, "//")
line, _, _ = strings.Cut(line, "/*")
line = strings.ToLower(strings.TrimSpace(line))
if line == "" {
continue
}
// Examples:
// IP-CIDR,162.208.16.0/24
// IP-CIDR6,2a0b:e40:1::/48
// IP-CIDR,162.208.16.0/24,no-resolve
// IP-CIDR6,2a0b:e40:1::/48,no-resolve
if strings.HasPrefix(line, "ip-cidr,") || strings.HasPrefix(line, "ip-cidr6,") {
parts := strings.Split(line, ",")
if len(parts) < 2 {
continue
}
line = strings.TrimSpace(parts[1])
if line == "" {
continue
}
if err := entry.AddPrefix(line); err != nil {
return err
}
}
}
if err := scanner.Err(); err != nil {
return err
}
return nil
}
func (t *textIn) scanFileForJSONIn(reader io.Reader, entry *lib.Entry) error {
data, err := io.ReadAll(reader)
if err != nil {
return err
}
if !gjson.ValidBytes(data) {
return fmt.Errorf("❌ [type %s | action %s] invalid JSON data", t.Type, t.Action)
}
// JSON Path syntax:
// https://github.com/tidwall/gjson/blob/master/SYNTAX.md
for _, path := range t.JSONPath {
path = strings.TrimSpace(path)
result := gjson.GetBytes(data, path)
if err := t.processJSONResult(result, entry); err != nil {
return fmt.Errorf("❌ [type %s | action %s] failed to process JSON: %v", t.Type, t.Action, err)
}
}
return nil
}
func (t *textIn) processJSONResult(result gjson.Result, entry *lib.Entry) error {
switch {
case !result.Exists():
return fmt.Errorf("invaild IP address or CIDR (value not exist), please check your specified JSON path or JSON source")
case result.Type == gjson.String:
cidr := strings.TrimSpace(result.String())
if cidr == "" {
return fmt.Errorf("empty string, please check your specified JSON path or JSON source")
}
if err := entry.AddPrefix(cidr); err != nil {
return err
}
case result.IsArray():
for _, item := range result.Array() {
if err := t.processJSONResult(item, entry); err != nil {
return err
}
}
default:
return fmt.Errorf("invaild IP address or CIDR, please check your specified JSON path or JSON source")
}
return nil
}
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