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Fix S3 Delete method's notion of subpaths 

Deleting "/a" was deleting "/a/b" but also "/ab".

Signed-off-by: Noah Treuhaft <noah.treuhaft@docker.com>
pull/1988/head
Noah Treuhaft 2016-10-05 16:39:38 -07:00
parent b89a594355
commit 76226c61a9
2 changed files with 55 additions and 2 deletions
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8
registry/storage/driver/s3-aws/s3.go
View File

@ -784,10 +784,12 @@ func min(a, b int) int {
// We must be careful since S3 does not guarantee read after delete consistency
func (d *driver) Delete(ctx context.Context, path string) error {
s3Objects := make([]*s3.ObjectIdentifier, 0, listMax)
s3Path := d.s3Path(path)
listObjectsInput := &s3.ListObjectsInput{
Bucket: aws.String(d.Bucket),
Prefix: aws.String(d.s3Path(path)),
Prefix: aws.String(s3Path),
}
ListLoop:
for {
// list all the objects
resp, err := d.S3.ListObjects(listObjectsInput)
@ -800,6 +802,10 @@ func (d *driver) Delete(ctx context.Context, path string) error {
}
for _, key := range resp.Contents {
// Stop if we encounter a key that is not a subpath (so that deleting "/a" does not delete "/ab").
if len(*key.Key) > len(s3Path) && (*key.Key)[len(s3Path)] != '/' {
break ListLoop
}
s3Objects = append(s3Objects, &s3.ObjectIdentifier{
Key: key.Key,
})

49
registry/storage/driver/testsuites/testsuites.go
View File

@ -15,9 +15,10 @@ import (
"testing"
"time"
"gopkg.in/check.v1"
"github.com/docker/distribution/context"
storagedriver "github.com/docker/distribution/registry/storage/driver"
"gopkg.in/check.v1"
)
// Test hooks up gocheck into the "go test" runner.
@ -717,6 +718,52 @@ func (suite *DriverSuite) TestDeleteFolder(c *check.C) {
c.Assert(strings.Contains(err.Error(), suite.Name()), check.Equals, true)
}
// TestDeleteOnlyDeletesSubpaths checks that deleting path A does not
// delete path B when A is a prefix of B but B is not a subpath of A (so that
// deleting "/a" does not delete "/ab"). This matters for services like S3 that
// do not implement directories.
func (suite *DriverSuite) TestDeleteOnlyDeletesSubpaths(c *check.C) {
dirname := randomPath(32)
filename := randomPath(32)
contents := randomContents(32)
defer suite.deletePath(c, firstPart(dirname))
err := suite.StorageDriver.PutContent(suite.ctx, path.Join(dirname, filename), contents)
c.Assert(err, check.IsNil)
err = suite.StorageDriver.PutContent(suite.ctx, path.Join(dirname, filename+"suffix"), contents)
c.Assert(err, check.IsNil)
err = suite.StorageDriver.PutContent(suite.ctx, path.Join(dirname, dirname, filename), contents)
c.Assert(err, check.IsNil)
err = suite.StorageDriver.PutContent(suite.ctx, path.Join(dirname, dirname+"suffix", filename), contents)
c.Assert(err, check.IsNil)
err = suite.StorageDriver.Delete(suite.ctx, path.Join(dirname, filename))
c.Assert(err, check.IsNil)
_, err = suite.StorageDriver.GetContent(suite.ctx, path.Join(dirname, filename))
c.Assert(err, check.NotNil)
c.Assert(err, check.FitsTypeOf, storagedriver.PathNotFoundError{})
c.Assert(strings.Contains(err.Error(), suite.Name()), check.Equals, true)
_, err = suite.StorageDriver.GetContent(suite.ctx, path.Join(dirname, filename+"suffix"))
c.Assert(err, check.IsNil)
err = suite.StorageDriver.Delete(suite.ctx, path.Join(dirname, dirname))
c.Assert(err, check.IsNil)
_, err = suite.StorageDriver.GetContent(suite.ctx, path.Join(dirname, dirname, filename))
c.Assert(err, check.NotNil)
c.Assert(err, check.FitsTypeOf, storagedriver.PathNotFoundError{})
c.Assert(strings.Contains(err.Error(), suite.Name()), check.Equals, true)
_, err = suite.StorageDriver.GetContent(suite.ctx, path.Join(dirname, dirname+"suffix", filename))
c.Assert(err, check.IsNil)
}
// TestStatCall runs verifies the implementation of the storagedriver's Stat call.
func (suite *DriverSuite) TestStatCall(c *check.C) {
content := randomContents(4096)