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replace hand-written slice utilities with methods from slices package

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SFTPGo depends on Go 1.22 so we can use slices package

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>
This commit is contained in:
Nicola Murino 2024-07-24 18:17:55 +02:00
parent 6ba1198c47
commit bd5eb03d9c
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GPG key ID: 935D2952DEC4EECF
4 changed files with 11 additions and 21 deletions
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15
internal/common/connection.go
View file

@ -21,6 +21,7 @@ import (
"io/fs" "io/fs"
"os" "os"
"path" "path"
"slices"
"strings" "strings"
"sync" "sync"
"sync/atomic" "sync/atomic"
@ -1795,12 +1796,12 @@ type DirListerAt struct {
lister vfs.DirLister lister vfs.DirLister
} }
// Add adds the given os.FileInfo to the internal cache // Prepend adds the given os.FileInfo as first element of the internal cache
func (l *DirListerAt) Add(fi os.FileInfo) { func (l *DirListerAt) Prepend(fi os.FileInfo) {
l.mu.Lock() l.mu.Lock()
defer l.mu.Unlock() defer l.mu.Unlock()
l.info = append(l.info, fi) l.info = slices.Insert(l.info, 0, fi)
} }
// ListAt implements sftp.ListerAt // ListAt implements sftp.ListerAt
@ -1813,10 +1814,10 @@ func (l *DirListerAt) ListAt(f []os.FileInfo, _ int64) (int, error) {
} }
if len(f) <= len(l.info) { if len(f) <= len(l.info) {
files := make([]os.FileInfo, 0, len(f)) files := make([]os.FileInfo, 0, len(f))
for idx := len(l.info) - 1; idx >= 0; idx-- { for idx := range l.info {
files = append(files, l.info[idx]) files = append(files, l.info[idx])
if len(files) == len(f) { if len(files) == len(f) {
l.info = l.info[:idx] l.info = l.info[idx+1:]
n := copy(f, files) n := copy(f, files)
return n, nil return n, nil
} }
@ -1838,9 +1839,7 @@ func (l *DirListerAt) Next(limit int) ([]os.FileInfo, error) {
} }
files = l.user.FilterListDir(files, l.virtualPath) files = l.user.FilterListDir(files, l.virtualPath)
if len(l.info) > 0 { if len(l.info) > 0 {
for _, fi := range l.info { files = slices.Concat(l.info, files)
files = util.PrependFileInfo(files, fi)
}
l.info = nil l.info = nil
} }
if err != nil || len(files) > 0 { if err != nil || len(files) > 0 {

4
internal/common/connection_test.go
View file

@ -1134,8 +1134,8 @@ func TestListerAt(t *testing.T) {
require.Equal(t, 0, n) require.Equal(t, 0, n)
lister, err = conn.ListDir("/") lister, err = conn.ListDir("/")
require.NoError(t, err) require.NoError(t, err)
lister.Add(vfs.NewFileInfo("..", true, 0, time.Unix(0, 0), false)) lister.Prepend(vfs.NewFileInfo("..", true, 0, time.Unix(0, 0), false))
lister.Add(vfs.NewFileInfo(".", true, 0, time.Unix(0, 0), false)) lister.Prepend(vfs.NewFileInfo(".", true, 0, time.Unix(0, 0), false))
files = make([]os.FileInfo, 1) files = make([]os.FileInfo, 1)
n, err = lister.ListAt(files, 0) n, err = lister.ListAt(files, 0)
require.NoError(t, err) require.NoError(t, err)

4
internal/sftpd/handler.go
View file

@ -221,9 +221,9 @@ func (c *Connection) Filelist(request *sftp.Request) (sftp.ListerAt, error) {
} }
modTime := time.Unix(0, 0) modTime := time.Unix(0, 0)
if request.Filepath != "/" { if request.Filepath != "/" {
lister.Add(vfs.NewFileInfo("..", true, 0, modTime, false)) lister.Prepend(vfs.NewFileInfo("..", true, 0, modTime, false))
} }
lister.Add(vfs.NewFileInfo(".", true, 0, modTime, false)) lister.Prepend(vfs.NewFileInfo(".", true, 0, modTime, false))
return lister, nil return lister, nil
case "Stat": case "Stat":
if !c.User.HasPerm(dataprovider.PermListItems, path.Dir(request.Filepath)) { if !c.User.HasPerm(dataprovider.PermListItems, path.Dir(request.Filepath)) {

9
internal/util/util.go
View file

@ -809,15 +809,6 @@ func GetRedactedURL(rawurl string) string {
return u.Redacted() return u.Redacted()
} }
// PrependFileInfo prepends a file info to a slice in an efficient way.
// We, optimistically, assume that the slice has enough capacity
func PrependFileInfo(files []os.FileInfo, info os.FileInfo) []os.FileInfo {
files = append(files, nil)
copy(files[1:], files)
files[0] = info
return files
}
// GetTLSVersion returns the TLS version for integer: // GetTLSVersion returns the TLS version for integer:
// - 12 means TLS 1.2 // - 12 means TLS 1.2
// - 13 means TLS 1.3 // - 13 means TLS 1.3