Properly using namespaces when unmarshaling in XML

private/protocol/xml/xmlutil/unmarshal.go

@@ -112,7 +112,7 @@ func parseStruct(r reflect.Value, node *XMLNode, tag reflect.StructTag) error {
 
 		if elems == nil { // try to find the field in attributes
 			for _, a := range node.Attr {
-				if name == a.Name.Local {
+				if name == strings.Join([]string{a.Name.Space, a.Name.Local}, ":") {
 					// turn this into a text node for de-serializing
 					elems = []*XMLNode{{Text: a.Value}}
 				}

private/protocol/xml/xmlutil/xml_to_struct.go

@@ -63,6 +63,8 @@ func XMLToStruct(d *xml.Decoder, s *xml.StartElement) (*XMLNode, error) {
 				return out, e
 			}
 			node.Name = typed.Name
+			node.Attr = out.Attr
+			node = adaptNode(node)
 			slice = append(slice, node)
 			out.Children[name] = slice
 		case xml.EndElement:
@@ -74,6 +76,26 @@ func XMLToStruct(d *xml.Decoder, s *xml.StartElement) (*XMLNode, error) {
 	return out, nil
 }
 
+func adaptNode(node *XMLNode) *XMLNode {
+	ns := map[string]string{}
+	for _, a := range node.Attr {
+		if a.Name.Space == "xmlns" {
+			ns[a.Value] = a.Name.Local
+			break
+		}
+	}
+
+	for i, a := range node.Attr {
+		if a.Name.Space == "xmlns" {
+			continue
+		}
+		if v, ok := ns[node.Attr[i].Name.Space]; ok {
+			node.Attr[i].Name.Space = v
+		}
+	}
+	return node
+}
+
 // StructToXML writes an XMLNode to a xml.Encoder as tokens.
 func StructToXML(e *xml.Encoder, node *XMLNode, sorted bool) error {
 	e.EncodeToken(xml.StartElement{Name: node.Name, Attr: node.Attr})

private/protocol/xml/xmlutil/xml_to_struct_test.go

@@ -0,0 +1,53 @@
+package xmlutil_test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/awstesting/unit"
+	"github.com/aws/aws-sdk-go/service/s3"
+)
+
+func TestUnmarshal(t *testing.T) {
+	xmlVal := []byte(`<?xml version="1.0" encoding="UTF-8"?>
+	<AccessControlPolicy xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Owner><ID>foo-id</ID><DisplayName>user</DisplayName></Owner><AccessControlList><Grant><Grantee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="type"><ID>foo-id</ID><DisplayName>user</DisplayName></Grantee><Permission>FULL_CONTROL</Permission></Grant></AccessControlList><
+	/AccessControlPolicy>`)
+
+	var server = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write(xmlVal)
+	}))
+
+	sess := unit.Session
+	sess.Config.Endpoint = &server.URL
+	sess.Config.S3ForcePathStyle = aws.Bool(true)
+	svc := s3.New(sess)
+
+	out, err := svc.GetBucketAcl(&s3.GetBucketAclInput{
+		Bucket: aws.String("foo"),
+	})
+
+	assert.NoError(t, err)
+
+	expected := &s3.GetBucketAclOutput{
+		Grants: []*s3.Grant{
+			&s3.Grant{
+				Grantee: &s3.Grantee{
+					DisplayName: aws.String("user"),
+					ID:          aws.String("foo-id"),
+					Type:        aws.String("type"),
+				},
+				Permission: aws.String("FULL_CONTROL"),
+			},
+		},
+
+		Owner: &s3.Owner{
+			DisplayName: aws.String("user"),
+			ID:          aws.String("foo-id"),
+		},
+	}
+	assert.Equal(t, expected, out)
+}