From 9c0b781193cb027593513590004dc1b5e7170448 Mon Sep 17 00:00:00 2001
From: Pavel Pogodaev <p.pogodaev@yadro.com>
Date: Fri, 19 Jul 2024 22:20:40 +0300
Subject: [PATCH] [#31] Add force bucket delete flag

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>
---
 api/handler/delete.go      |  9 +++++++
 api/handler/delete_test.go | 25 ++++++++++++++++++
 api/headers.go             |  1 +
 api/layer/layer.go         | 21 ++++++++-------
 docs/extensions.md         | 52 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 99 insertions(+), 9 deletions(-)
 create mode 100644 docs/extensions.md

diff --git a/api/handler/delete.go b/api/handler/delete.go
index 7fc081e..dab05b1 100644
--- a/api/handler/delete.go
+++ b/api/handler/delete.go
@@ -237,9 +237,18 @@ func (h *handler) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
 		sessionToken = boxData.Gate.SessionTokenForDelete()
 	}
 
+	skipObjCheck := false
+	if value, ok := r.Header[api.AmzForceBucketDelete]; ok {
+		s := value[0]
+		if s == "true" {
+			skipObjCheck = true
+		}
+	}
+
 	if err = h.obj.DeleteBucket(r.Context(), &layer.DeleteBucketParams{
 		BktInfo:      bktInfo,
 		SessionToken: sessionToken,
+		SkipCheck:    skipObjCheck,
 	}); err != nil {
 		h.logAndSendError(w, "couldn't delete bucket", reqInfo, err)
 		return
diff --git a/api/handler/delete_test.go b/api/handler/delete_test.go
index 2ad0154..2bf71e3 100644
--- a/api/handler/delete_test.go
+++ b/api/handler/delete_test.go
@@ -85,6 +85,24 @@ func TestDeleteBucketOnNotFoundError(t *testing.T) {
 	deleteBucket(t, hc, bktName, http.StatusNoContent)
 }
 
+func TestForceDeleteBucket(t *testing.T) {
+	hc := prepareHandlerContext(t)
+
+	bktName, objName := "bucket-for-removal", "object-to-delete"
+	bktInfo := createTestBucket(hc, bktName)
+
+	putObject(hc, bktName, objName)
+
+	nodeVersion, err := hc.tree.GetUnversioned(hc.context, bktInfo, objName)
+	require.NoError(t, err)
+	var addr oid.Address
+	addr.SetContainer(bktInfo.CID)
+	addr.SetObject(nodeVersion.OID)
+
+	deleteBucketForce(t, hc, bktName, http.StatusConflict, "false")
+	deleteBucketForce(t, hc, bktName, http.StatusNoContent, "true")
+}
+
 func TestDeleteMultipleObjectCheckUniqueness(t *testing.T) {
 	hc := prepareHandlerContext(t)
 
@@ -517,6 +535,13 @@ func deleteObjectsBase(hc *handlerContext, bktName string, objVersions [][2]stri
 	return w
 }
 
+func deleteBucketForce(t *testing.T, tc *handlerContext, bktName string, code int, value string) {
+	w, r := prepareTestRequest(tc, bktName, "", nil)
+	r.Header.Set(api.AmzForceBucketDelete, value)
+	tc.Handler().DeleteBucketHandler(w, r)
+	assertStatus(t, w, code)
+}
+
 func deleteBucket(t *testing.T, tc *handlerContext, bktName string, code int) {
 	w, r := prepareTestRequest(tc, bktName, "", nil)
 	tc.Handler().DeleteBucketHandler(w, r)
diff --git a/api/headers.go b/api/headers.go
index a91149c..540d3cc 100644
--- a/api/headers.go
+++ b/api/headers.go
@@ -62,6 +62,7 @@ const (
 	AmzMaxParts                  = "X-Amz-Max-Parts"
 	AmzPartNumberMarker          = "X-Amz-Part-Number-Marker"
 	AmzStorageClass              = "X-Amz-Storage-Class"
+	AmzForceBucketDelete         = "X-Amz-Force-Delete-Bucket"
 
 	AmzServerSideEncryptionCustomerAlgorithm = "x-amz-server-side-encryption-customer-algorithm"
 	AmzServerSideEncryptionCustomerKey       = "x-amz-server-side-encryption-customer-key"
diff --git a/api/layer/layer.go b/api/layer/layer.go
index bf527a4..215389a 100644
--- a/api/layer/layer.go
+++ b/api/layer/layer.go
@@ -170,6 +170,7 @@ type (
 	DeleteBucketParams struct {
 		BktInfo      *data.BucketInfo
 		SessionToken *session.Container
+		SkipCheck    bool
 	}
 
 	// ListObjectVersionsParams stores list objects versions parameters.
@@ -804,16 +805,18 @@ func (n *Layer) ResolveBucket(ctx context.Context, name string) (cid.ID, error)
 }
 
 func (n *Layer) DeleteBucket(ctx context.Context, p *DeleteBucketParams) error {
-	res, _, err := n.getAllObjectsVersions(ctx, commonVersionsListingParams{
-		BktInfo: p.BktInfo,
-		MaxKeys: 1,
-	})
+	if !p.SkipCheck {
+		res, _, err := n.getAllObjectsVersions(ctx, commonVersionsListingParams{
+			BktInfo: p.BktInfo,
+			MaxKeys: 1,
+		})
 
-	if err != nil {
-		return err
-	}
-	if len(res) != 0 {
-		return errors.GetAPIError(errors.ErrBucketNotEmpty)
+		if err != nil {
+			return err
+		}
+		if len(res) != 0 {
+			return errors.GetAPIError(errors.ErrBucketNotEmpty)
+		}
 	}
 
 	n.cache.DeleteBucket(p.BktInfo)
diff --git a/docs/extensions.md b/docs/extensions.md
new file mode 100644
index 0000000..72cc93a
--- /dev/null
+++ b/docs/extensions.md
@@ -0,0 +1,52 @@
+# S3 API Extension
+
+## Bucket operations management
+
+### Action to delete bucket (DeleteBucket)
+
+Deletes bucket with all objects in it.
+
+#### Request Parameters
+
+- **Bucket**
+
+  Specifies the bucket being deleted.
+
+
+#### Errors
+
+- **NoSuchEntity**
+
+  The request was rejected because it referenced a resource entity that does not exist.
+
+  HTTP Status Code: 404
+
+- **ServiceFailure**
+
+  The request processing has failed because of an unknown error, exception or failure.
+
+  HTTP Status Code: 500
+
+
+#### Example
+
+Sample Request
+
+```text
+DELETE / HTTP/1.1
+X-Amz-Force-Delete-Bucket: true
+Host: data.s3.<Region>.frostfs-s3-gw.com
+Date: Wed, 01 Mar  2024 12:00:00 GMT
+Authorization: authorization string
+```
+
+Sample Response
+
+```text
+HTTP/1.1 204 No Content
+        x-amz-id-2: JuKZqmXuiwFeDQxhD7M8KtsKobSzWA1QEjLbTMTagkKdBX2z7Il/jGhDeJ3j6s80
+        x-amz-request-id: 32FE2CEB32F5EE25
+        Date: Wed, 01 Mar  2006 12:00:00 GMT
+        Connection: close
+        Server: AmazonS3
+```