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ui.go
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ui.go
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package ui
import (
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"regexp"
"github.com/bettercap/bettercap/session"
"github.com/google/go-github/github"
"github.com/evilsocket/islazy/fs"
"github.com/evilsocket/islazy/tui"
"github.com/evilsocket/islazy/zip"
)
var versionParser = regexp.MustCompile(`name:"ui",version:"([^"]+)"`)
type UIModule struct {
session.SessionModule
client *github.Client
tmpFile string
basePath string
uiPath string
}
func NewUIModule(s *session.Session) *UIModule {
mod := &UIModule{
SessionModule: session.NewSessionModule("ui", s),
client: github.NewClient(nil),
}
mod.AddParam(session.NewStringParameter("ui.basepath",
"/usr/local/share/bettercap/",
"",
"UI base installation path."))
mod.AddParam(session.NewStringParameter("ui.tmpfile",
filepath.Join(os.TempDir(), "ui.zip"),
"",
"Temporary file to use while downloading UI updates."))
mod.AddHandler(session.NewModuleHandler("ui.version", "",
"Print the currently installed UI version.",
func(args []string) error {
return mod.showVersion()
}))
mod.AddHandler(session.NewModuleHandler("ui.update", "",
"Download the latest available version of the UI and install it.",
func(args []string) error {
return mod.Start()
}))
return mod
}
func (mod *UIModule) Name() string {
return "ui"
}
func (mod *UIModule) Description() string {
return "A module to manage bettercap's UI updates and installed version."
}
func (mod *UIModule) Author() string {
return "Simone Margaritelli <evilsocket@gmail.com>"
}
func (mod *UIModule) Configure() (err error) {
if err, mod.basePath = mod.StringParam("ui.basepath"); err != nil {
return err
} else {
mod.uiPath = filepath.Join(mod.basePath, "ui")
}
if err, mod.tmpFile = mod.StringParam("ui.tmpfile"); err != nil {
return err
}
return nil
}
func (mod *UIModule) Stop() error {
return nil
}
func (mod *UIModule) download(version, url string) error {
if !fs.Exists(mod.basePath) {
mod.Warning("creating ui install path %s ...", mod.basePath)
if err := os.MkdirAll(mod.basePath, os.ModePerm); err != nil {
return err
}
}
out, err := os.Create(mod.tmpFile)
if err != nil {
return err
}
defer out.Close()
defer os.Remove(mod.tmpFile)
mod.Info("downloading ui %s from %s ...", tui.Bold(version), url)
resp, err := http.Get(url)
if err != nil {
return err
}
defer resp.Body.Close()
if _, err := io.Copy(out, resp.Body); err != nil {
return err
}
if fs.Exists(mod.uiPath) {
mod.Warning("removing previously installed UI from %s ...", mod.uiPath)
if err := os.RemoveAll(mod.uiPath); err != nil {
return err
}
}
mod.Info("installing to %s ...", mod.uiPath)
if _, err = zip.Unzip(mod.tmpFile, mod.basePath); err != nil {
return err
}
mod.Info("installation complete, you can now run the %s (or https-ui) caplet to start the UI.", tui.Bold("http-ui"))
return nil
}
func (mod *UIModule) showVersion() error {
if err := mod.Configure(); err != nil {
return err
}
if !fs.Exists(mod.uiPath) {
return fmt.Errorf("path %s does not exist, ui not installed", mod.uiPath)
}
search := filepath.Join(mod.uiPath, "/main.*.js")
matches, err := filepath.Glob(search)
if err != nil {
return err
} else if len(matches) == 0 {
return fmt.Errorf("can't find any main.*.js files in %s", mod.uiPath)
}
for _, filename := range matches {
if raw, err := ioutil.ReadFile(filename); err != nil {
return err
} else if m := versionParser.FindStringSubmatch(string(raw)); m != nil {
version := m[1]
mod.Info("v%s", version)
return nil
}
}
return fmt.Errorf("can't parse version from %s", search)
}
func (mod *UIModule) Start() error {
if err := mod.Configure(); err != nil {
return err
} else if err := mod.SetRunning(true, nil); err != nil {
return err
}
defer mod.SetRunning(false, nil)
mod.Info("checking latest stable release ...")
if releases, _, err := mod.client.Repositories.ListReleases(context.Background(), "bettercap", "ui", nil); err == nil {
latest := releases[0]
for _, a := range latest.Assets {
if *a.Name == "ui.zip" {
return mod.download(*latest.TagName, *a.BrowserDownloadURL)
}
}
} else {
mod.Error("error while fetching latest release info from GitHub: %s", err)
}
return nil
}