Route53 deserializer customization

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/AwsGoDependency.java

@@ -81,6 +81,6 @@ protected static GoDependency module(
     }
 
     private static final class Versions {
-        private static final String AWS_SDK = "v0.0.0-20201001231852-1fc1ab173989";
+        private static final String AWS_SDK = "v0.0.0-20201002231452-4f578e93925d";
     }
 }

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/customization/AwsCustomGoDependency.java

@@ -37,6 +37,8 @@ public final class AwsCustomGoDependency extends AwsGoDependency {
             "service/kinesis/internal/customizations", "kinesiscust");
     public static final GoDependency MACHINE_LEARNING_CUSTOMIZATION = aws(
             "service/machinelearning/internal/customizations", "mlcust");
+    public static final GoDependency ROUTE53_CUSTOMIZATION = aws(
+            "service/route53/internal/customizations", "route53cust");
 
     private AwsCustomGoDependency() {
         super();

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/customization/Route53ErrorCustomizations.java

@@ -0,0 +1,51 @@
+package software.amazon.smithy.aws.go.codegen.customization;
+
+import java.util.List;
+import software.amazon.smithy.aws.traits.ServiceTrait;
+import software.amazon.smithy.go.codegen.SymbolUtils;
+import software.amazon.smithy.go.codegen.integration.GoIntegration;
+import software.amazon.smithy.go.codegen.integration.MiddlewareRegistrar;
+import software.amazon.smithy.go.codegen.integration.RuntimeClientPlugin;
+import software.amazon.smithy.model.Model;
+import software.amazon.smithy.model.shapes.OperationShape;
+import software.amazon.smithy.model.shapes.ServiceShape;
+import software.amazon.smithy.utils.ListUtils;
+
+public class Route53ErrorCustomizations implements GoIntegration {
+    private static String ADD_ERROR_HANDLER_INTERNAL = "HandleCustomErrorDeserialization";
+
+    @Override
+    public byte getOrder() {
+        // The associated customization ordering is relative to operation deserializers
+        // and thus the integration should be added at the end.
+        return 127;
+    }
+
+    @Override
+    public List<RuntimeClientPlugin> getClientPlugins() {
+        return ListUtils.of(
+                RuntimeClientPlugin.builder()
+                        .operationPredicate(Route53ErrorCustomizations::supportsCustomError)
+                        .registerMiddleware(MiddlewareRegistrar.builder()
+                                .resolvedFunction(SymbolUtils.createValueSymbolBuilder(ADD_ERROR_HANDLER_INTERNAL,
+                                        AwsCustomGoDependency.ROUTE53_CUSTOMIZATION).build())
+                                .build())
+                        .build()
+        );
+    }
+
+    // returns true if the operation supports custom route53 error response
+    private static boolean supportsCustomError(Model model, ServiceShape service, OperationShape operation){
+        if (!isRoute53Service(model, service)) {
+            return false;
+        }
+
+        return operation.getId().getName().equalsIgnoreCase("ChangeResourceRecordSets");
+    }
+
+    // returns true if service is route53
+    private static boolean isRoute53Service(Model model, ServiceShape service) {
+        String serviceId= service.expectTrait(ServiceTrait.class).getSdkId();
+        return serviceId.equalsIgnoreCase("Route 53");
+    }
+}

codegen/smithy-aws-go-codegen/src/main/resources/META-INF/services/software.amazon.smithy.go.codegen.integration.GoIntegration

@@ -22,3 +22,4 @@ software.amazon.smithy.aws.go.codegen.customization.MachineLearningCustomization
 software.amazon.smithy.aws.go.codegen.customization.S3AcceptEncodingGzip
 software.amazon.smithy.aws.go.codegen.customization.KinesisCustomizations
 software.amazon.smithy.aws.go.codegen.customization.S3ErrorWith200Status
+software.amazon.smithy.aws.go.codegen.customization.Route53ErrorCustomizations

service/route53/go.mod

@@ -3,7 +3,7 @@ module github.com/aws/aws-sdk-go-v2/service/route53
 go 1.15
 
 require (
-	github.com/aws/aws-sdk-go-v2 v0.0.0-20201001231852-1fc1ab173989
+	github.com/aws/aws-sdk-go-v2 v0.0.0-20201005175632-36f8dc6bcc52
 	github.com/awslabs/smithy-go v0.1.1
 )
 

service/route53/internal/customizations/custom_error_deser.go

@@ -0,0 +1,93 @@
+package customizations
+
+import (
+	"bytes"
+	"context"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"strings"
+
+	"github.com/awslabs/smithy-go"
+	"github.com/awslabs/smithy-go/middleware"
+	"github.com/awslabs/smithy-go/ptr"
+	smithyhttp "github.com/awslabs/smithy-go/transport/http"
+	smithyxml "github.com/awslabs/smithy-go/xml"
+
+	awsmiddle "github.com/aws/aws-sdk-go-v2/aws/middleware"
+	"github.com/aws/aws-sdk-go-v2/service/route53/types"
+)
+
+// HandleCustomErrorDeserialization check if Route53 response is an error and needs
+// custom error deserialization.
+//
+func HandleCustomErrorDeserialization(stack *middleware.Stack) {
+	stack.Deserialize.Insert(&processResponseMiddleware{}, "OperationDeserializer", middleware.After)
+}
+
+// middleware to process raw response and look for error response with InvalidChangeBatch error tag
+type processResponseMiddleware struct{}
+
+// ID returns the middleware ID.
+func (*processResponseMiddleware) ID() string { return "Route53:ProcessResponseForCustomErrorResponse" }
+
+func (m *processResponseMiddleware) HandleDeserialize(
+	ctx context.Context, in middleware.DeserializeInput, next middleware.DeserializeHandler) (
+	out middleware.DeserializeOutput, metadata middleware.Metadata, err error,
+) {
+	out, metadata, err = next.HandleDeserialize(ctx, in)
+	if err != nil {
+		return out, metadata, err
+	}
+
+	response, ok := out.RawResponse.(*smithyhttp.Response)
+	if !ok {
+		return out, metadata, &smithy.DeserializationError{Err: fmt.Errorf("unknown transport type %T", out.RawResponse)}
+	}
+
+	// check if success response
+	if response.StatusCode >= 200 && response.StatusCode < 300 {
+		return
+	}
+
+	var readBuff bytes.Buffer
+	body := io.TeeReader(response.Body, &readBuff)
+
+	rootDecoder := xml.NewDecoder(body)
+	t, err := smithyxml.FetchRootElement(rootDecoder)
+	if err == io.EOF {
+		return out, metadata, nil
+	}
+
+	// rewind response body
+	response.Body = ioutil.NopCloser(io.MultiReader(&readBuff, response.Body))
+
+	// if start tag is "InvalidChangeBatch", the error response needs custom unmarshaling.
+	if strings.EqualFold(t.Name.Local, "InvalidChangeBatch") {
+		return out, metadata, route53CustomErrorDeser(&metadata, response)
+	}
+
+	return out, metadata, err
+}
+
+// error type for invalidChangeBatchError
+type invalidChangeBatchError struct {
+	Messages  []string `xml:"Messages>Message"`
+	RequestID string   `xml:"RequestId"`
+}
+
+func route53CustomErrorDeser(metadata *middleware.Metadata, response *smithyhttp.Response) error {
+	err := invalidChangeBatchError{}
+	xml.NewDecoder(response.Body).Decode(&err)
+
+	// set request id in metadata
+	if len(err.RequestID) != 0 {
+		awsmiddle.SetRequestIDMetadata(metadata, err.RequestID)
+	}
+
+	return &types.InvalidChangeBatch{
+		Message:  ptr.String("ChangeBatch errors occurred"),
+		Messages: ptr.StringSlice(err.Messages),
+	}
+}

service/route53/internal/customizations/custom_error_deser_test.go

@@ -0,0 +1,123 @@
+package customizations_test
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/service/route53"
+	"github.com/aws/aws-sdk-go-v2/service/route53/types"
+)
+
+func TestCustomErrorDeserialization(t *testing.T) {
+	cases := map[string]struct {
+		responseStatus     int
+		responseBody       []byte
+		expectedError      string
+		expectedRequestID  string
+		expectedResponseID string
+	}{
+		"invalidChangeBatchError": {
+			responseStatus: 500,
+			responseBody: []byte(`<?xml version="1.0" encoding="UTF-8"?>
+		<InvalidChangeBatch xmlns="https://route53.amazonaws.com/doc/2013-04-01/">
+		  <Messages>
+		    <Message>Tried to create resource record set duplicate.example.com. type A, but it already exists</Message>
+		  </Messages>
+		  <RequestId>b25f48e8-84fd-11e6-80d9-574e0c4664cb</RequestId>
+		</InvalidChangeBatch>`),
+			expectedError:     "InvalidChangeBatch: ChangeBatch errors occurred",
+			expectedRequestID: "b25f48e8-84fd-11e6-80d9-574e0c4664cb",
+		},
+
+		"standardRestXMLError": {
+			responseStatus: 500,
+			responseBody: []byte(`<?xml version="1.0"?>
+		<ErrorResponse xmlns="http://route53.amazonaws.com/doc/2016-09-07/">
+		  <Error>
+		    <Type>Sender</Type>
+		    <Code>MalformedXML</Code>
+		    <Message>1 validation error detected: Value null at 'route53#ChangeSet' failed to satisfy constraint: Member must not be null</Message>
+		  </Error>
+		  <RequestId>b25f48e8-84fd-11e6-80d9-574e0c4664cb</RequestId>
+		</ErrorResponse>
+		`),
+			expectedError:     "1 validation error detected:",
+			expectedRequestID: "b25f48e8-84fd-11e6-80d9-574e0c4664cb",
+		},
+
+		"Success response": {
+			responseStatus: 200,
+			responseBody: []byte(`<?xml version="1.0" encoding="UTF-8"?>
+		<ChangeResourceRecordSetsResponse>
+   			<ChangeInfo>
+      		<Comment>mockComment</Comment>
+      		<Id>mockID</Id>
+   		</ChangeInfo>
+		</ChangeResourceRecordSetsResponse>`),
+			expectedResponseID: "mockID",
+		},
+	}
+
+	for name, c := range cases {
+		server := httptest.NewServer(http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(c.responseStatus)
+				w.Write(c.responseBody)
+			}))
+		defer server.Close()
+
+		t.Run(name, func(t *testing.T) {
+			svc := route53.NewFromConfig(aws.Config{
+				Region: "us-east-1",
+				EndpointResolver: aws.EndpointResolverFunc(func(service, region string) (aws.Endpoint, error) {
+					return aws.Endpoint{
+						URL:         server.URL,
+						SigningName: "route53",
+					}, nil
+				}),
+				Retryer: aws.NoOpRetryer{},
+			})
+			resp, err := svc.ChangeResourceRecordSets(context.Background(), &route53.ChangeResourceRecordSetsInput{
+				ChangeBatch: &types.ChangeBatch{
+					Changes: []*types.Change{},
+					Comment: aws.String("mock"),
+				},
+				HostedZoneId: aws.String("zone"),
+			})
+
+			if err == nil && len(c.expectedError) != 0 {
+				t.Fatalf("expected err, got none")
+			}
+
+			if len(c.expectedError) != 0 {
+				if e, a := c.expectedError, err.Error(); !strings.Contains(a, e) {
+					t.Fatalf("expected error to be %s, got %s", e, a)
+				}
+
+				var responseError interface {
+					ServiceRequestID() string
+				}
+
+				if !errors.As(err, &responseError) {
+					t.Fatalf("expected error to be of type %T, was not", responseError)
+				}
+
+				if e, a := c.expectedRequestID, responseError.ServiceRequestID(); !strings.EqualFold(e, a) {
+					t.Fatalf("expected request id to be %s, got %s", e, a)
+				}
+			}
+
+			if len(c.expectedResponseID) != 0 {
+				if e, a := c.expectedResponseID, *resp.ChangeInfo.Id; !strings.EqualFold(e, a) {
+					t.Fatalf("expected response to have id %v, got %v", e, a)
+				}
+			}
+
+		})
+	}
+}

service/route53/internal/customizations/doc.go

@@ -0,0 +1,41 @@
+// Package customizations provides customizations for the Amazon Route53 API client.
+//
+// This package provides support for following customizations
+//
+//  Process Response Middleware: used for custom error deserializing
+//
+//
+// Process Response Middleware
+//
+// Route53 operation "ChangeResourceRecordSets" can have an error response returned in
+// a slightly different format. This customization is only applicable to
+// ChangeResourceRecordSets operation of Route53.
+//
+// Here's a sample error response:
+//
+//  <?xml version="1.0" encoding="UTF-8"?>
+//  <InvalidChangeBatch xmlns="https://route53.amazonaws.com/doc/2013-04-01/">
+//      <Messages>
+//          <Message>Tried to create resource record set duplicate.example.com. type A, but it already exists</Message>
+//      </Messages>
+//  </InvalidChangeBatch>
+//
+//
+// The processResponse middleware customizations enables SDK to check for an error
+// response starting with "InvalidChangeBatch" tag prior to deserialization.
+//
+// As this check in error response needs to be performed earlier than response
+// deserialization. Since the behavior of Deserialization is in
+// reverse order to the other stack steps its easier to consider that "after" means
+// "before".
+//
+//  Middleware layering:
+//
+//  HTTP Response -> process response error -> deserialize
+//
+//
+// In case the returned error response has `InvalidChangeBatch` format, the error is
+// deserialized and returned. The operation deserializer does not attempt to deserialize
+// as an error is returned by the process response error middleware.
+//
+package customizations