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b91c349cd5
Before this fix if a file was updated, but to the same length and
timestamp then the local backend would return the wrong (cached)
hashes for the object.
This happens regularly on a crypted local disk mount when the VFS
thinks files have been changed but actually their contents are
identical to that written previously. This is because when files are
uploaded their nonce changes so the contents of the file changes but
the timestamp and size remain the same because the file didn't
actually change.
This causes errors like this:
ERROR: file: Failed to copy: corrupted on transfer: md5 crypted
hash differ "X" vs "Y"
This turned out to be because the local backend wasn't clearing its
cache of hashes when the file was updated.
This fix clears the hash cache for Update and Remove.
It also puts a src and destination in the crypt message to make future
debugging easier.
Fixes #4031
232 lines
6.1 KiB
Go
232 lines
6.1 KiB
Go
package local
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import (
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"bytes"
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"context"
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"testing"
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"time"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/config/configmap"
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"github.com/rclone/rclone/fs/hash"
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"github.com/rclone/rclone/fs/object"
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"github.com/rclone/rclone/fstest"
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"github.com/rclone/rclone/lib/file"
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"github.com/rclone/rclone/lib/readers"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// TestMain drives the tests
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func TestMain(m *testing.M) {
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fstest.TestMain(m)
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}
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// Test copy with source file that's updating
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func TestUpdatingCheck(t *testing.T) {
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r := fstest.NewRun(t)
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defer r.Finalise()
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filePath := "sub dir/local test"
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r.WriteFile(filePath, "content", time.Now())
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fd, err := file.Open(path.Join(r.LocalName, filePath))
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if err != nil {
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t.Fatalf("failed opening file %q: %v", filePath, err)
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}
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defer func() {
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require.NoError(t, fd.Close())
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}()
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fi, err := fd.Stat()
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require.NoError(t, err)
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o := &Object{size: fi.Size(), modTime: fi.ModTime(), fs: &Fs{}}
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wrappedFd := readers.NewLimitedReadCloser(fd, -1)
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hash, err := hash.NewMultiHasherTypes(hash.Supported())
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require.NoError(t, err)
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in := localOpenFile{
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o: o,
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in: wrappedFd,
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hash: hash,
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fd: fd,
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}
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buf := make([]byte, 1)
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_, err = in.Read(buf)
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require.NoError(t, err)
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r.WriteFile(filePath, "content updated", time.Now())
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_, err = in.Read(buf)
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require.Errorf(t, err, "can't copy - source file is being updated")
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// turn the checking off and try again
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in.o.fs.opt.NoCheckUpdated = true
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r.WriteFile(filePath, "content updated", time.Now())
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_, err = in.Read(buf)
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require.NoError(t, err)
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}
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func TestSymlink(t *testing.T) {
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ctx := context.Background()
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r := fstest.NewRun(t)
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defer r.Finalise()
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f := r.Flocal.(*Fs)
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dir := f.root
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// Write a file
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modTime1 := fstest.Time("2001-02-03T04:05:10.123123123Z")
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file1 := r.WriteFile("file.txt", "hello", modTime1)
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// Write a symlink
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modTime2 := fstest.Time("2002-02-03T04:05:10.123123123Z")
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symlinkPath := filepath.Join(dir, "symlink.txt")
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require.NoError(t, os.Symlink("file.txt", symlinkPath))
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require.NoError(t, lChtimes(symlinkPath, modTime2, modTime2))
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// Object viewed as symlink
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file2 := fstest.NewItem("symlink.txt"+linkSuffix, "file.txt", modTime2)
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// Object viewed as destination
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file2d := fstest.NewItem("symlink.txt", "hello", modTime1)
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// Check with no symlink flags
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r.CheckLocalItems(t, file1)
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r.CheckRemoteItems(t)
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// Set fs into "-L" mode
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f.opt.FollowSymlinks = true
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f.opt.TranslateSymlinks = false
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f.lstat = os.Stat
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r.CheckLocalItems(t, file1, file2d)
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r.CheckRemoteItems(t)
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// Set fs into "-l" mode
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f.opt.FollowSymlinks = false
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f.opt.TranslateSymlinks = true
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f.lstat = os.Lstat
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fstest.CheckListingWithPrecision(t, r.Flocal, []fstest.Item{file1, file2}, nil, fs.ModTimeNotSupported)
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if haveLChtimes {
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r.CheckLocalItems(t, file1, file2)
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}
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// Create a symlink
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modTime3 := fstest.Time("2002-03-03T04:05:10.123123123Z")
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file3 := r.WriteObjectTo(ctx, r.Flocal, "symlink2.txt"+linkSuffix, "file.txt", modTime3, false)
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fstest.CheckListingWithPrecision(t, r.Flocal, []fstest.Item{file1, file2, file3}, nil, fs.ModTimeNotSupported)
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if haveLChtimes {
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r.CheckLocalItems(t, file1, file2, file3)
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}
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// Check it got the correct contents
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symlinkPath = filepath.Join(dir, "symlink2.txt")
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fi, err := os.Lstat(symlinkPath)
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require.NoError(t, err)
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assert.False(t, fi.Mode().IsRegular())
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linkText, err := os.Readlink(symlinkPath)
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require.NoError(t, err)
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assert.Equal(t, "file.txt", linkText)
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// Check that NewObject gets the correct object
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o, err := r.Flocal.NewObject(ctx, "symlink2.txt"+linkSuffix)
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require.NoError(t, err)
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assert.Equal(t, "symlink2.txt"+linkSuffix, o.Remote())
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assert.Equal(t, int64(8), o.Size())
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// Check that NewObject doesn't see the non suffixed version
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_, err = r.Flocal.NewObject(ctx, "symlink2.txt")
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require.Equal(t, fs.ErrorObjectNotFound, err)
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// Check reading the object
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in, err := o.Open(ctx)
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require.NoError(t, err)
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contents, err := ioutil.ReadAll(in)
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require.NoError(t, err)
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require.Equal(t, "file.txt", string(contents))
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require.NoError(t, in.Close())
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// Check reading the object with range
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in, err = o.Open(ctx, &fs.RangeOption{Start: 2, End: 5})
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require.NoError(t, err)
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contents, err = ioutil.ReadAll(in)
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require.NoError(t, err)
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require.Equal(t, "file.txt"[2:5+1], string(contents))
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require.NoError(t, in.Close())
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}
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func TestSymlinkError(t *testing.T) {
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m := configmap.Simple{
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"links": "true",
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"copy_links": "true",
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}
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_, err := NewFs(context.Background(), "local", "/", m)
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assert.Equal(t, errLinksAndCopyLinks, err)
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}
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// Test hashes on updating an object
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func TestHashOnUpdate(t *testing.T) {
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ctx := context.Background()
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r := fstest.NewRun(t)
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defer r.Finalise()
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const filePath = "file.txt"
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when := time.Now()
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r.WriteFile(filePath, "content", when)
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f := r.Flocal.(*Fs)
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// Get the object
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o, err := f.NewObject(ctx, filePath)
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require.NoError(t, err)
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// Test the hash is as we expect
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md5, err := o.Hash(ctx, hash.MD5)
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require.NoError(t, err)
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assert.Equal(t, "9a0364b9e99bb480dd25e1f0284c8555", md5)
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// Reupload it with diferent contents but same size and timestamp
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var b = bytes.NewBufferString("CONTENT")
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src := object.NewStaticObjectInfo(filePath, when, int64(b.Len()), true, nil, f)
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err = o.Update(ctx, b, src)
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require.NoError(t, err)
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// Check the hash is as expected
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md5, err = o.Hash(ctx, hash.MD5)
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require.NoError(t, err)
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assert.Equal(t, "45685e95985e20822fb2538a522a5ccf", md5)
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}
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// Test hashes on deleting an object
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func TestHashOnDelete(t *testing.T) {
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ctx := context.Background()
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r := fstest.NewRun(t)
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defer r.Finalise()
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const filePath = "file.txt"
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when := time.Now()
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r.WriteFile(filePath, "content", when)
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f := r.Flocal.(*Fs)
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// Get the object
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o, err := f.NewObject(ctx, filePath)
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require.NoError(t, err)
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// Test the hash is as we expect
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md5, err := o.Hash(ctx, hash.MD5)
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require.NoError(t, err)
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assert.Equal(t, "9a0364b9e99bb480dd25e1f0284c8555", md5)
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// Delete the object
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require.NoError(t, o.Remove(ctx))
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// Test the hash cache is empty
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require.Nil(t, o.(*Object).hashes)
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// Test the hash returns an error
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_, err = o.Hash(ctx, hash.MD5)
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require.Error(t, err)
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}
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