[#594] Fix unmarshal cors: expected element in name space error

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>

api/handler/cors.go

@@ -29,7 +29,7 @@ func (h *handler) GetBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	cors, err := h.obj.GetBucketCORS(ctx, bktInfo)
+	cors, err := h.obj.GetBucketCORS(ctx, bktInfo, h.cfg.NewXMLDecoder)
 	if err != nil {
 		h.logAndSendError(ctx, w, "could not get cors", reqInfo, err)
 		return
@@ -112,7 +112,7 @@ func (h *handler) AppendCORSHeaders(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	cors, err := h.obj.GetBucketCORS(ctx, bktInfo)
+	cors, err := h.obj.GetBucketCORS(ctx, bktInfo, h.cfg.NewXMLDecoder)
 	if err != nil {
 		h.reqLogger(ctx).Warn(logs.GetBucketCors, zap.Error(err))
 		return
@@ -178,7 +178,7 @@ func (h *handler) Preflight(w http.ResponseWriter, r *http.Request) {
 		headers = strings.Split(requestHeaders, ", ")
 	}
 
-	cors, err := h.obj.GetBucketCORS(ctx, bktInfo)
+	cors, err := h.obj.GetBucketCORS(ctx, bktInfo, h.cfg.NewXMLDecoder)
 	if err != nil {
 		h.logAndSendError(ctx, w, "could not get cors", reqInfo, err)
 		return

api/handler/cors_test.go

@@ -19,7 +19,14 @@ func TestCORSOriginWildcard(t *testing.T) {
 	</CORSRule>
 </CORSConfiguration>
 `
-	hc := prepareHandlerContext(t)
+	bodyNoXmlns := `
+<CORSConfiguration>
+	<CORSRule>
+		<AllowedMethod>GET</AllowedMethod>
+		<AllowedOrigin>*</AllowedOrigin>
+	</CORSRule>
+</CORSConfiguration>`
+	hc := prepareHandlerContextWithMinCache(t)
 
 	bktName := "bucket-for-cors"
 	box, _ := createAccessBox(t)
@@ -39,6 +46,17 @@ func TestCORSOriginWildcard(t *testing.T) {
 	w, r = prepareTestPayloadRequest(hc, bktName, "", nil)
 	hc.Handler().GetBucketCorsHandler(w, r)
 	assertStatus(t, w, http.StatusOK)
+
+	hc.config.useDefaultXMLNS = true
+	w, r = prepareTestPayloadRequest(hc, bktName, "", strings.NewReader(bodyNoXmlns))
+	ctx = middleware.SetBox(r.Context(), &middleware.Box{AccessBox: box})
+	r = r.WithContext(ctx)
+	hc.Handler().PutBucketCorsHandler(w, r)
+	assertStatus(t, w, http.StatusOK)
+
+	w, r = prepareTestPayloadRequest(hc, bktName, "", nil)
+	hc.Handler().GetBucketCorsHandler(w, r)
+	assertStatus(t, w, http.StatusOK)
 }
 
 func TestPreflight(t *testing.T) {

api/handler/handlers_test.go

@@ -79,6 +79,7 @@ type configMock struct {
 	bypassContentEncodingInChunks bool
 	md5Enabled                    bool
 	tlsTerminationHeader          string
+	useDefaultXMLNS               bool
 }
 
 func (c *configMock) DefaultPlacementPolicy(_ string) netmap.PlacementPolicy {
@@ -99,7 +100,11 @@ func (c *configMock) DefaultCopiesNumbers(_ string) []uint32 {
 }
 
 func (c *configMock) NewXMLDecoder(r io.Reader, _ string) *xml.Decoder {
-	return xml.NewDecoder(r)
+	dec := xml.NewDecoder(r)
+	if c.useDefaultXMLNS {
+		dec.DefaultSpace = "http://s3.amazonaws.com/doc/2006-03-01/"
+	}
+	return dec
 }
 
 func (c *configMock) BypassContentEncodingInChunks(_ string) bool {

api/layer/cors.go

@@ -3,6 +3,7 @@ package layer
 import (
 	"bytes"
 	"context"
+	"encoding/xml"
 	"errors"
 	"fmt"
 	"io"
@@ -95,8 +96,8 @@ func (n *Layer) deleteCORSObject(ctx context.Context, bktInfo *data.BucketInfo,
 	}
 }
 
-func (n *Layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*data.CORSConfiguration, error) {
+func (n *Layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo, decoder func(io.Reader, string) *xml.Decoder) (*data.CORSConfiguration, error) {
-	cors, err := n.getCORS(ctx, bktInfo)
+	cors, err := n.getCORS(ctx, bktInfo, decoder)
 	if err != nil {
 		return nil, err
 	}

api/layer/system_object.go

@@ -5,6 +5,7 @@ import (
 	"encoding/xml"
 	"errors"
 	"fmt"
+	"io"
 	"math"
 	"strconv"
 	"time"
@@ -161,7 +162,7 @@ func (n *Layer) GetLockInfo(ctx context.Context, objVersion *data.ObjectVersion)
 	return lockInfo, nil
 }
 
-func (n *Layer) getCORS(ctx context.Context, bkt *data.BucketInfo) (*data.CORSConfiguration, error) {
+func (n *Layer) getCORS(ctx context.Context, bkt *data.BucketInfo, decoder func(io.Reader, string) *xml.Decoder) (*data.CORSConfiguration, error) {
 	owner := n.BearerOwner(ctx)
 	if cors := n.cache.GetCORS(owner, bkt); cors != nil {
 		return cors, nil
@@ -190,7 +191,7 @@ func (n *Layer) getCORS(ctx context.Context, bkt *data.BucketInfo) (*data.CORSCo
 	}
 
 	cors := &data.CORSConfiguration{}
-	if err = xml.NewDecoder(obj.Payload).Decode(&cors); err != nil {
+	if err = decoder(obj.Payload, "").Decode(&cors); err != nil {
 		return nil, fmt.Errorf("unmarshal cors: %w", err)
 	}