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- package session
- import (
- "fmt"
- "io/ioutil"
- "path/filepath"
- "regexp"
- "strings"
- "github.com/bettercap/bettercap/caplets"
- _ "github.com/bettercap/bettercap/js"
- "github.com/evilsocket/islazy/fs"
- "github.com/evilsocket/islazy/plugin"
- "github.com/evilsocket/islazy/str"
- )
- // require("telegram.js")
- var requireParser = regexp.MustCompile(`(?msi)^\s*require\s*\(\s*["']([^"']+)["']\s*\);?\s*$`)
- type Script struct {
- *plugin.Plugin
- }
- // yo! we're doing c-like preprocessing on a javascript file from go :D
- func preprocess(basePath string, code string, level int) (string, error) {
- if level >= 255 {
- return "", fmt.Errorf("too many nested includes")
- }
- matches := requireParser.FindAllStringSubmatch(code, -1)
- for _, match := range matches {
- expr := match[0]
- fileName := str.Trim(match[1])
- if fileName[0] != '/' {
- searchPaths := []string{
- filepath.Join(basePath, fileName),
- filepath.Join(caplets.InstallBase, fileName),
- }
- if !strings.Contains(fileName, ".js") {
- searchPaths = append(searchPaths, []string{
- filepath.Join(basePath, fileName) + ".js",
- filepath.Join(caplets.InstallBase, fileName) + ".js",
- }...)
- }
- found := false
- for _, fName := range searchPaths {
- if fs.Exists(fName) {
- fileName = fName
- found = true
- break
- }
- }
- if !found {
- return "", fmt.Errorf("file %s not found in any of %#v", fileName, searchPaths)
- }
- }
- raw, err := ioutil.ReadFile(fileName)
- if err != nil {
- return "", fmt.Errorf("%s: %v", fileName, err)
- }
- if includedBody, err := preprocess(filepath.Dir(fileName), string(raw), level+1); err != nil {
- return "", fmt.Errorf("%s: %v", fileName, err)
- } else {
- code = strings.ReplaceAll(code, expr, includedBody)
- }
- }
- return code, nil
- }
- func LoadScript(fileName string) (*Script, error) {
- raw, err := ioutil.ReadFile(fileName)
- if err != nil {
- return nil, err
- }
- basePath := filepath.Dir(fileName)
- if code, err := preprocess(basePath, string(raw), 0); err != nil {
- return nil, err
- } else if p, err := plugin.Parse(code); err != nil {
- return nil, err
- } else {
- p.Path = fileName
- p.Name = strings.Replace(basePath, ".js", "", -1)
- return &Script{
- Plugin: p,
- }, nil
- }
- }
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