forked from vulsio/gost
/
util.go
416 lines (369 loc) · 8.87 KB
/
util.go
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package util
import (
"bytes"
"fmt"
"io"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/briandowns/spinner"
"github.com/inconshreveable/log15"
"github.com/parnurzeal/gorequest"
"github.com/spf13/viper"
"golang.org/x/xerrors"
pb "gopkg.in/cheggaaa/pb.v1"
"gorm.io/gorm"
)
// GenWorkers generate workers
func GenWorkers(num, wait int) chan<- func() {
tasks := make(chan func())
for i := 0; i < num; i++ {
go func() {
for f := range tasks {
f()
time.Sleep(time.Duration(wait) * time.Second)
}
}()
}
return tasks
}
// GetDefaultLogDir returns default log directory
func GetDefaultLogDir() string {
defaultLogDir := "/var/log/gost"
if runtime.GOOS == "windows" {
defaultLogDir = filepath.Join(os.Getenv("APPDATA"), "gost")
}
return defaultLogDir
}
// DeleteNil deletes nil in errs
func DeleteNil(errs []error) (new []error) {
for _, err := range errs {
if err != nil {
new = append(new, err)
}
}
return new
}
// DeleteRecordNotFound deletes gorm.ErrRecordNotFound in errs
func DeleteRecordNotFound(errs []error) (new []error) {
for _, err := range errs {
if err != nil && err != gorm.ErrRecordNotFound {
new = append(new, err)
}
}
return new
}
// TrimSpaceNewline deletes space character and newline character(CR/LF)
func TrimSpaceNewline(str string) string {
str = strings.TrimSpace(str)
return strings.Trim(str, "\r\n")
}
// FetchURL returns HTTP response body
func FetchURL(url, apikey string) ([]byte, error) {
var errs []error
httpProxy := viper.GetString("http-proxy")
req := gorequest.New().Proxy(httpProxy).Get(url)
if apikey != "" {
req.Header["api-key"] = []string{apikey}
}
resp, body, err := req.Type("text").EndBytes()
if len(errs) > 0 || resp == nil {
return nil, fmt.Errorf("HTTP error. errs: %v, url: %s", err, url)
}
if resp.StatusCode != 200 {
return nil, fmt.Errorf("HTTP error. errs: %v, status code: %d, url: %s", err, resp.StatusCode, url)
}
return body, nil
}
// FetchConcurrently fetches concurrently
func FetchConcurrently(urls []string, concurrency, wait int) (responses [][]byte, err error) {
reqChan := make(chan string, len(urls))
resChan := make(chan []byte, len(urls))
errChan := make(chan error, len(urls))
defer close(reqChan)
defer close(resChan)
defer close(errChan)
go func() {
for _, url := range urls {
reqChan <- url
}
}()
bar := pb.StartNew(len(urls))
tasks := GenWorkers(concurrency, wait)
for range urls {
tasks <- func() {
select {
case url := <-reqChan:
var err error
for i := 1; i <= 3; i++ {
var res []byte
res, err = FetchURL(url, "")
if err == nil {
resChan <- res
return
}
time.Sleep(time.Duration(i*2) * time.Second)
}
errChan <- err
}
}
bar.Increment()
}
bar.Finish()
errs := []error{}
timeout := time.After(10 * 60 * time.Second)
for range urls {
select {
case res := <-resChan:
responses = append(responses, res)
case err := <-errChan:
errs = append(errs, err)
case <-timeout:
return nil, fmt.Errorf("Timeout Fetching URL")
}
}
if 0 < len(errs) {
return nil, fmt.Errorf("%s", errs)
}
return responses, nil
}
// SetLogger set logger
func SetLogger(logDir string, debug, logJSON bool) {
stderrHundler := log15.StderrHandler
logFormat := log15.LogfmtFormat()
if logJSON {
logFormat = log15.JsonFormatEx(false, true)
stderrHundler = log15.StreamHandler(os.Stderr, logFormat)
}
lvlHundler := log15.LvlFilterHandler(log15.LvlInfo, stderrHundler)
if debug {
lvlHundler = log15.LvlFilterHandler(log15.LvlDebug, stderrHundler)
}
if _, err := os.Stat(logDir); os.IsNotExist(err) {
if err := os.Mkdir(logDir, 0700); err != nil {
log15.Error("Failed to create log directory", "err", err)
}
}
var hundler log15.Handler
if _, err := os.Stat(logDir); err == nil {
logPath := filepath.Join(logDir, "gost.log")
if _, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644); err != nil {
log15.Error("Failed to create a log file", "err", err)
hundler = lvlHundler
} else {
hundler = log15.MultiHandler(
log15.Must.FileHandler(logPath, logFormat),
lvlHundler,
)
}
} else {
hundler = lvlHundler
}
log15.Root().SetHandler(hundler)
}
// Major returns major version
func Major(osVer string) (majorVersion string) {
return strings.Split(osVer, ".")[0]
}
var cacheDir string
// DefaultCacheDir set default cache dir
func DefaultCacheDir() string {
tmpDir, err := os.UserCacheDir()
if err != nil {
tmpDir = os.TempDir()
}
return filepath.Join(tmpDir, "trivy")
}
// CacheDir return cache dir path string
func CacheDir() string {
return cacheDir
}
// SetCacheDir set cache dir path
func SetCacheDir(dir string) {
cacheDir = dir
}
// FileWalk walks the file tree rooted at root
func FileWalk(root string, targetFiles map[string]struct{}, walkFn func(r io.Reader, path string) error) error {
err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
if info.IsDir() {
return nil
}
rel, err := filepath.Rel(root, path)
if err != nil {
return xerrors.Errorf("error in filepath rel: %w", err)
}
if _, ok := targetFiles[rel]; !ok {
return nil
}
if info.Size() == 0 {
log15.Debug("invalid size: %s", path)
return nil
}
f, err := os.Open(path)
defer f.Close()
if err != nil {
return xerrors.Errorf("failed to open file: %w", err)
}
if err = walkFn(f, path); err != nil {
return err
}
return nil
})
if err != nil {
return xerrors.Errorf("error in file walk: %w", err)
}
return nil
}
// IsCommandAvailable check if command is available.
func IsCommandAvailable(name string) bool {
cmd := exec.Command(name, "--help")
if err := cmd.Run(); err != nil {
return false
}
return true
}
// Exists check if path exists
func Exists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil {
return true, nil
}
if os.IsNotExist(err) {
return false, nil
}
return true, err
}
// StringInSlice search within Slice by String
func StringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
// Exec run the command
func Exec(command string, args []string) (string, error) {
cmd := exec.Command(command, args...)
var stdoutBuf, stderrBuf bytes.Buffer
cmd.Stdout = &stdoutBuf
cmd.Stderr = &stderrBuf
if err := cmd.Run(); err != nil {
log15.Debug(stderrBuf.String())
return "", xerrors.Errorf("failed to exec: %w", err)
}
return stdoutBuf.String(), nil
}
// FilterTargets filter targets
func FilterTargets(prefixPath string, targets map[string]struct{}) (map[string]struct{}, error) {
filtered := map[string]struct{}{}
for filename := range targets {
if strings.HasPrefix(filename, prefixPath) {
rel, err := filepath.Rel(prefixPath, filename)
if err != nil {
return nil, xerrors.Errorf("error in filepath rel: %w", err)
}
if strings.HasPrefix(rel, "../") {
continue
}
filtered[rel] = struct{}{}
}
}
return filtered, nil
}
var (
// Quiet manages the display of NewSpinner, ProgressBar
Quiet = false
)
// Spinner has Spinner client
type Spinner struct {
client *spinner.Spinner
}
// NewSpinner creates a Spinner
func NewSpinner(suffix string) *Spinner {
if Quiet {
return &Spinner{}
}
s := spinner.New(spinner.CharSets[36], 100*time.Millisecond)
s.Suffix = suffix
return &Spinner{client: s}
}
// Start will start Spinner
func (s *Spinner) Start() {
if s.client == nil {
return
}
s.client.Start()
}
// Stop will stop the Spinner
func (s *Spinner) Stop() {
if s.client == nil {
return
}
s.client.Stop()
}
// ProgressBar has ProgressBar client
type ProgressBar struct {
client *pb.ProgressBar
}
// PbStartNew creates a ProgressBar
func PbStartNew(total int) *ProgressBar {
if Quiet {
return &ProgressBar{}
}
bar := pb.StartNew(total)
return &ProgressBar{client: bar}
}
// Increment increments the ProgressBar
func (p *ProgressBar) Increment() {
if p.client == nil {
return
}
p.client.Increment()
}
// Finish to exit the ProgressBar
func (p *ProgressBar) Finish() {
if p.client == nil {
return
}
p.client.Finish()
}
// Errors has a set of errors that occurred in GORM
type Errors []error
// Add adds an error to a given slice of errors
func (errs Errors) Add(newErrors ...error) Errors {
for _, err := range newErrors {
if err == nil {
continue
}
if errors, ok := err.(Errors); ok {
errs = errs.Add(errors...)
} else {
ok = true
for _, e := range errs {
if err == e {
ok = false
}
}
if ok {
errs = append(errs, err)
}
}
}
return errs
}
// Error takes a slice of all errors that have occurred and returns it as a formatted string
func (errs Errors) Error() string {
var errors = []string{}
for _, e := range errs {
errors = append(errors, e.Error())
}
return strings.Join(errors, "; ")
}
// GetErrors gets all errors that have occurred and returns a slice of errors (Error type)
func (errs Errors) GetErrors() []error {
return errs
}