Simple web UI to manage OpenVPN users.
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ovpn-admin/helpers.go

307 lines
5.8 KiB

package main
import (
"archive/tar"
"compress/gzip"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
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log "github.com/sirupsen/logrus"
)
func parseDate(layout, datetime string) time.Time {
t, err := time.Parse(layout, datetime)
if err != nil {
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log.Errorln(err)
}
return t
}
func parseDateToString(layout, datetime, format string) string {
return parseDate(layout, datetime).Format(format)
}
func parseDateToUnix(layout, datetime string) int64 {
return parseDate(layout, datetime).Unix()
}
func runBash(script string) string {
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log.Debugln(script)
cmd := exec.Command("bash", "-c", script)
stdout, err := cmd.CombinedOutput()
if err != nil {
return fmt.Sprint(err) + " : " + string(stdout)
}
return string(stdout)
}
func fExist(path string) bool {
var _, err = os.Stat(path)
if os.IsNotExist(err) {
return false
} else if err != nil {
log.Fatalf("fExist: %s", err)
return false
}
return true
}
func fRead(path string) string {
content, err := ioutil.ReadFile(path)
if err != nil {
log.Warning(err)
return ""
}
return string(content)
}
func fCreate(path string) error {
var _, err = os.Stat(path)
if os.IsNotExist(err) {
var file, err = os.Create(path)
if err != nil {
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log.Errorln(err)
return err
}
defer file.Close()
}
return nil
}
func fWrite(path, content string) error {
err := ioutil.WriteFile(path, []byte(content), 0644)
if err != nil {
log.Fatal(err)
}
return nil
}
func fDelete(path string) error {
err := os.Remove(path)
if err != nil {
log.Fatal(err)
}
return nil
}
func fCopy(src, dst string) error {
sfi, err := os.Stat(src)
if err != nil {
return err
}
if !sfi.Mode().IsRegular() {
// cannot copy non-regular files (e.g., directories, symlinks, devices, etc.)
return fmt.Errorf("fCopy: non-regular source file %s (%q)", sfi.Name(), sfi.Mode().String())
}
dfi, err := os.Stat(dst)
if err != nil {
if !os.IsNotExist(err) {
return err
}
} else {
if !(dfi.Mode().IsRegular()) {
return fmt.Errorf("fCopy: non-regular destination file %s (%q)", dfi.Name(), dfi.Mode().String())
}
if os.SameFile(sfi, dfi) {
return err
}
}
if err = os.Link(src, dst); err == nil {
return err
}
in, err := os.Open(src)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(dst)
if err != nil {
return err
}
defer func() {
cerr := out.Close()
if err == nil {
err = cerr
}
}()
if _, err = io.Copy(out, in); err != nil {
return err
}
err = out.Sync()
return err
}
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func fMove(src, dst string) error {
err := fCopy(src, dst)
if err != nil {
log.Warn(err)
return err
}
err = fDelete(src)
if err != nil {
log.Warn(err)
return err
}
return nil
}
func fDownload(path, url string, basicAuth bool) error {
client := &http.Client{}
req, err := http.NewRequest("GET", url, nil)
if basicAuth {
req.SetBasicAuth(*masterBasicAuthUser, *masterBasicAuthPassword)
}
resp, err := client.Do(req)
if err != nil {
return err
}
if resp.StatusCode != 200 {
log.Warnf("WARNING: Download file operation for url %s finished with status code %d\n", url, resp.StatusCode)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
fCreate(path)
fWrite(path, string(body))
return nil
}
func createArchiveFromDir(dir, path string) error {
var files []string
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
log.Warn(err)
return err
}
if !info.IsDir() {
files = append(files, path)
}
return nil
})
if err != nil {
log.Warn(err)
}
out, err := os.Create(path)
if err != nil {
log.Errorf("Error writing archive %s: %s", path, err)
return err
}
defer out.Close()
gw := gzip.NewWriter(out)
defer gw.Close()
tw := tar.NewWriter(gw)
defer tw.Close()
// Iterate over files and add them to the tar archive
for _, filePath := range files {
file, err := os.Open(filePath)
if err != nil {
log.Warnf("Error writing archive %s: %s", path, err)
return err
}
// Get FileInfo about our file providing file size, mode, etc.
info, err := file.Stat()
if err != nil {
file.Close()
return err
}
// Create a tar Header from the FileInfo data
header, err := tar.FileInfoHeader(info, info.Name())
if err != nil {
file.Close()
return err
}
header.Name = strings.Replace(filePath, dir+"/", "", 1)
// Write file header to the tar archive
err = tw.WriteHeader(header)
if err != nil {
file.Close()
return err
}
// Copy file content to tar archive
_, err = io.Copy(tw, file)
if err != nil {
file.Close()
return err
}
file.Close()
}
return nil
}
func extractFromArchive(archive, path string) error {
// Open the file which will be written into the archive
file, err := os.Open(archive)
if err != nil {
return err
}
defer file.Close()
// Write file header to the tar archive
uncompressedStream, err := gzip.NewReader(file)
if err != nil {
log.Fatal("extractFromArchive(): NewReader failed")
}
tarReader := tar.NewReader(uncompressedStream)
for true {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("extractFromArchive: Next() failed: %s", err.Error())
}
switch header.Typeflag {
case tar.TypeDir:
if err := os.Mkdir(path+"/"+header.Name, 0755); err != nil {
log.Fatalf("extractFromArchive: Mkdir() failed: %s", err.Error())
}
case tar.TypeReg:
outFile, err := os.Create(path + "/" + header.Name)
if err != nil {
log.Fatalf("extractFromArchive: Create() failed: %s", err.Error())
}
if _, err := io.Copy(outFile, tarReader); err != nil {
log.Fatalf("extractFromArchive: Copy() failed: %s", err.Error())
}
outFile.Close()
default:
log.Fatalf(
"extractFromArchive: uknown type: %s in %s", header.Typeflag, header.Name)
}
}
return nil
}