[1.18] plugins/aws: Requiretransform may be deprecated but still is in use (#10606)

Co-authored-by: David Jumani <[email protected]>

Author: nfuden

changelog/v1.18.10/requesttransformordering.yaml

@@ -0,0 +1,5 @@
+changelog:
+- type: FIX
+  issueLink: https://github.com/solo-io/solo-projects/issues/7882
+  resolvesIssue: false
+  description: Fixes a bug where the route ordering affects the deprecated aws requiretransform functionality.

projects/gloo/pkg/plugins/aws/plugin.go

@@ -259,9 +259,8 @@ func (p *Plugin) ProcessRoute(params plugins.RouteParams, in *v1.Route, out *env
 				return nil, nil
 			}
 
-			p.requiresTransformationFilter = true
-
 			var reqTransform *envoy_transform.Transformation
+			var transform *envoy_transform.RouteTransformations_RouteTransformation
 			if requiresRequestTransformation {
 				reqTransform = &envoy_transform.Transformation{
 					TransformationType: &envoy_transform.Transformation_HeaderBodyTransform{
@@ -270,10 +269,7 @@ func (p *Plugin) ProcessRoute(params plugins.RouteParams, in *v1.Route, out *env
 						},
 					},
 				}
-			}
 
-			var transform *envoy_transform.RouteTransformations_RouteTransformation
-			if requiresRequestTransformation {
 				// Early stage transform: place all headers in the request body
 				transform = &envoy_transform.RouteTransformations_RouteTransformation{
 					Stage: transformation.AwsStageNumber,
@@ -283,8 +279,7 @@ func (p *Plugin) ProcessRoute(params plugins.RouteParams, in *v1.Route, out *env
 						},
 					},
 				}
-			} else {
-				p.requiresTransformationFilter = false
+				p.requiresTransformationFilter = true
 			}
 
 			var transforms envoy_transform.RouteTransformations

projects/gloo/pkg/plugins/aws/plugin_test.go

@@ -650,6 +650,22 @@ var _ = Describe("Plugin", func() {
 				err = awsPlugin.(plugins.RoutePlugin).ProcessRoute(plugins.RouteParams{VirtualHostParams: vhostParams}, route, outroute)
 				Expect(err).To(MatchError("only one of unwrapAsAlb and unwrapAsApiGateway/responseTransformation may be set"))
 			})
+			It("should respect RequestTransformation irrespective of route ordering", func() {
+				err := awsPlugin.(plugins.UpstreamPlugin).ProcessUpstream(params, upstream, out)
+				Expect(err).NotTo(HaveOccurred())
+				route.GetRouteAction().GetSingle().GetDestinationSpec().GetAws().RequestTransformation = true
+				err = awsPlugin.(plugins.RoutePlugin).ProcessRoute(plugins.RouteParams{VirtualHostParams: vhostParams}, route, outroute)
+				Expect(err).NotTo(HaveOccurred())
+
+				route.GetRouteAction().GetSingle().GetDestinationSpec().GetAws().RequestTransformation = false
+				route.GetRouteAction().GetSingle().GetDestinationSpec().GetAws().UnwrapAsApiGateway = true
+				err = awsPlugin.(plugins.RoutePlugin).ProcessRoute(plugins.RouteParams{VirtualHostParams: vhostParams}, route, outroute)
+				Expect(err).NotTo(HaveOccurred())
+
+				filters, err := awsPlugin.(plugins.HttpFilterPlugin).HttpFilters(params, nil)
+				Expect(err).NotTo(HaveOccurred())
+				Expect(filters).To(HaveLen(2))
+			})
 		})
 	})