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archive/zip: use Modified in FileHeader.FileInfo

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The Modified field allows representation of extended timestamps, which provide more accuracy than the legacy MS-DOS timestamps.
The FileInfo method provides an implementation of the os.FileInfo interface for files inside archives.

With this change, we make FileInfo use the Modified field, if present, to return more detailed timestamps from its ModTime method.

Fixes #28350

Change-Id: Ia31b5b871a3e61df38a3a1325787ae23ea0b8088
GitHub-Last-Rev: 13e94be3f8
GitHub-Pull-Request: golang/go#28352
Reviewed-on: https://go-review.googlesource.com/c/go/+/144382
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
This commit is contained in:
Jannis Andrija Schnitzer 2019-04-08 07:31:59 +00:00 committed by Daniel Martí
parent 9017b6149e
commit 20995f6274
2 changed files with 50 additions and 4 deletions
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13
src/archive/zip/struct.go
View File

@ -154,10 +154,15 @@ func (fi headerFileInfo) Size() int64 {
}
return int64(fi.fh.UncompressedSize)
}
func (fi headerFileInfo) IsDir() bool { return fi.Mode().IsDir() }
func (fi headerFileInfo) ModTime() time.Time { return fi.fh.ModTime() }
func (fi headerFileInfo) Mode() os.FileMode { return fi.fh.Mode() }
func (fi headerFileInfo) Sys() interface{} { return fi.fh }
func (fi headerFileInfo) IsDir() bool { return fi.Mode().IsDir() }
func (fi headerFileInfo) ModTime() time.Time {
if fi.fh.Modified.IsZero() {
return fi.fh.ModTime()
}
return fi.fh.Modified.UTC()
}
func (fi headerFileInfo) Mode() os.FileMode { return fi.fh.Mode() }
func (fi headerFileInfo) Sys() interface{} { return fi.fh }
// FileInfoHeader creates a partially-populated FileHeader from an
// os.FileInfo.

41
src/archive/zip/zip_test.go
View File

@ -114,6 +114,47 @@ func TestFileHeaderRoundTrip64(t *testing.T) {
testHeaderRoundTrip(fh, uint32max, fh.UncompressedSize64, t)
}
func TestFileHeaderRoundTripModified(t *testing.T) {
fh := &FileHeader{
Name: "foo.txt",
UncompressedSize: 987654321,
Modified: time.Now().Local(),
ModifiedTime: 1234,
ModifiedDate: 5678,
}
fi := fh.FileInfo()
fh2, err := FileInfoHeader(fi)
if err != nil {
t.Fatal(err)
}
if got, want := fh2.Modified, fh.Modified.UTC(); got != want {
t.Errorf("Modified: got %s, want %s\n", got, want)
}
if got, want := fi.ModTime(), fh.Modified.UTC(); got != want {
t.Errorf("Modified: got %s, want %s\n", got, want)
}
}
func TestFileHeaderRoundTripWithoutModified(t *testing.T) {
fh := &FileHeader{
Name: "foo.txt",
UncompressedSize: 987654321,
ModifiedTime: 1234,
ModifiedDate: 5678,
}
fi := fh.FileInfo()
fh2, err := FileInfoHeader(fi)
if err != nil {
t.Fatal(err)
}
if got, want := fh2.ModTime(), fh.ModTime(); got != want {
t.Errorf("Modified: got %s, want %s\n", got, want)
}
if got, want := fi.ModTime(), fh.ModTime(); got != want {
t.Errorf("Modified: got %s, want %s\n", got, want)
}
}
type repeatedByte struct {
off int64
b byte