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|
package customizations
import (
"context"
"fmt"
"net/url"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/internal/v4a"
"github.com/aws/aws-sdk-go-v2/service/eventbridge/internal/endpoints"
"github.com/aws/smithy-go"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// EndpointResolver interface for resolving service endpoints.
type EndpointResolver interface {
ResolveEndpoint(region string, options endpoints.Options) (aws.Endpoint, error)
}
// UpdateEndpointOptions provides configuration options for the UpdateEndpoint middleware.
type UpdateEndpointOptions struct {
GetEndpointIDFromInput func(interface{}) (*string, bool)
EndpointResolver EndpointResolver
EndpointResolverOptions endpoints.Options
}
// UpdateEndpoint is a middleware that handles routing an EventBridge operation to a multi-region endpoint.
func UpdateEndpoint(stack *middleware.Stack, options UpdateEndpointOptions) error {
const serializerID = "OperationSerializer"
return stack.Serialize.Insert(&updateEndpoint{
getEndpointIDFromInput: options.GetEndpointIDFromInput,
endpointResolver: options.EndpointResolver,
endpointResolverOptions: options.EndpointResolverOptions,
}, serializerID, middleware.Before)
}
type updateEndpoint struct {
getEndpointIDFromInput func(interface{}) (*string, bool)
endpointResolver EndpointResolver
endpointResolverOptions endpoints.Options
}
func (u *updateEndpoint) ID() string {
return "EventBridge:UpdateEndpoint"
}
func (u *updateEndpoint) HandleSerialize(ctx context.Context, in middleware.SerializeInput, next middleware.SerializeHandler) (out middleware.SerializeOutput, metadata middleware.Metadata, err error) {
if !awsmiddleware.GetRequiresLegacyEndpoints(ctx) {
return next.HandleSerialize(ctx, in)
}
// If getEndpointIDFromInput is nil but the middleware got attached just skip to the next handler
if u.getEndpointIDFromInput == nil {
return next.HandleSerialize(ctx, in)
}
value, ok := u.getEndpointIDFromInput(in.Parameters)
if !ok || value == nil {
return next.HandleSerialize(ctx, in)
}
req, ok := in.Request.(*smithyhttp.Request)
if !ok {
return out, metadata, fmt.Errorf("unknown transport type %T", req)
}
endpointID := aws.ToString(value)
if len(endpointID) == 0 {
return out, metadata, &smithy.SerializationError{
Err: fmt.Errorf("EndpointId must not be a zero-length string"),
}
}
if u.endpointResolverOptions.UseFIPSEndpoint == aws.FIPSEndpointStateEnabled {
return out, metadata, &smithy.SerializationError{
Err: fmt.Errorf("EventBridge multi-region endpoints do not support FIPS endpoint configuration"),
}
}
labels := strings.Split(endpointID, ".")
for _, label := range labels {
if !smithyhttp.ValidHostLabel(label) {
return out, metadata, &smithy.SerializationError{
Err: fmt.Errorf("EndpointId is not a valid host label, %s", endpointID),
}
}
}
region := awsmiddleware.GetRegion(ctx)
endpoint, err := u.endpointResolver.ResolveEndpoint(region, u.endpointResolverOptions)
if err != nil {
return out, metadata, &smithy.SerializationError{
Err: err,
}
}
if len(endpoint.SigningRegion) > 0 {
region = endpoint.SigningRegion
}
// set signing region and version for MRAP
endpoint.SigningRegion = "*"
ctx = awsmiddleware.SetSigningRegion(ctx, endpoint.SigningRegion)
ctx = SetSignerVersion(ctx, v4a.Version)
if len(endpoint.SigningName) != 0 {
ctx = awsmiddleware.SetSigningName(ctx, endpoint.SigningName)
}
if endpoint.Source == aws.EndpointSourceCustom {
return next.HandleSerialize(ctx, in)
}
dnsSuffix, err := endpoints.GetDNSSuffixFromRegion(region, u.endpointResolverOptions)
if err != nil {
return out, metadata, &smithy.SerializationError{
Err: err,
}
}
// modify endpoint host to use s3-global host prefix
scheme := strings.SplitN(endpoint.URL, "://", 2)
// set url as per partition
endpoint.URL = scheme[0] + "://" + endpointID + ".endpoint.events." + dnsSuffix
// assign resolved endpoint url to request url
req.URL, err = url.Parse(endpoint.URL)
if err != nil {
return out, metadata, &smithy.SerializationError{
Err: fmt.Errorf("failed to parse endpoint URL: %w", err),
}
}
return next.HandleSerialize(ctx, in)
}
|
