Add Header manipulation rules to Istio Virtual Service

pkg/apis/istio/v1alpha3/virtual_service.go

@@ -325,6 +325,9 @@ type HTTPRoute struct {
 	// destination.
 	Mirror *Destination `json:"mirror,omitempty"`
 
+	// Cross-Origin Resource Sharing policy (CORS). Refer to
+	// https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
+	// for further details about cross origin resource sharing.
 	CorsPolicy *CorsPolicy `json:"CorsPolicy,omitempty"`
 
 	// Additional HTTP headers to add before forwarding a request to the
@@ -333,6 +336,33 @@ type HTTPRoute struct {
 
 	// Http headers to remove before returning the response to the caller
 	RemoveResponseHeaders map[string]string `json:"removeResponseHeaders,omitempty"`
+
+	// Header manipulation rules
+	Headers *Headers `json:"headers,omitempty"`
+}
+
+// Header manipulation rules
+type Headers struct {
+	// Header manipulation rules to apply before forwarding a request
+	// to the destination service
+	Request HeaderOperations `json:"request,omitempty"`
+
+	// Header manipulation rules to apply before returning a response
+	// to the caller
+	Response HeaderOperations `json:"response,omitempty"`
+}
+
+// HeaderOperations Describes the header manipulations to apply
+type HeaderOperations struct {
+	// Overwrite the headers specified by key with the given values
+	Set map[string]string `json:"set"`
+
+	// Append the given values to the headers specified by keys
+	// (will create a comma-separated list of values)
+	Add map[string]string `json:"add"`
+
+	// Remove the specified headers
+	Remove []string `json:"remove"`
 }
 
 // HttpMatchRequest specifies a set of criterion to be met in order for the

pkg/apis/istio/v1alpha3/zz_generated.deepcopy.go

@@ -283,6 +283,11 @@ func (in *HTTPRoute) DeepCopyInto(out *HTTPRoute) {
 			(*out)[key] = val
 		}
 	}
+	if in.Headers != nil {
+		in, out := &in.Headers, &out.Headers
+		*out = new(Headers)
+		(*in).DeepCopyInto(*out)
+	}
 	return
 }
 
@@ -296,6 +301,59 @@ func (in *HTTPRoute) DeepCopy() *HTTPRoute {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *HeaderOperations) DeepCopyInto(out *HeaderOperations) {
+	*out = *in
+	if in.Set != nil {
+		in, out := &in.Set, &out.Set
+		*out = make(map[string]string, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+	}
+	if in.Add != nil {
+		in, out := &in.Add, &out.Add
+		*out = make(map[string]string, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+	}
+	if in.Remove != nil {
+		in, out := &in.Remove, &out.Remove
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new HeaderOperations.
+func (in *HeaderOperations) DeepCopy() *HeaderOperations {
+	if in == nil {
+		return nil
+	}
+	out := new(HeaderOperations)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Headers) DeepCopyInto(out *Headers) {
+	*out = *in
+	in.Request.DeepCopyInto(&out.Request)
+	in.Response.DeepCopyInto(&out.Response)
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Headers.
+func (in *Headers) DeepCopy() *Headers {
+	if in == nil {
+		return nil
+	}
+	out := new(Headers)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *InjectAbort) DeepCopyInto(out *InjectAbort) {
 	*out = *in