mirror of
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300 lines
9.4 KiB
Go
300 lines
9.4 KiB
Go
package s3
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import (
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"fmt"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/endpoints"
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"net/url"
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"strings"
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"github.com/aws/aws-sdk-go/aws"
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awsarn "github.com/aws/aws-sdk-go/aws/arn"
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"github.com/aws/aws-sdk-go/aws/request"
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"github.com/aws/aws-sdk-go/internal/s3shared"
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"github.com/aws/aws-sdk-go/internal/s3shared/arn"
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)
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const (
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s3Namespace = "s3"
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s3AccessPointNamespace = "s3-accesspoint"
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s3ObjectsLambdaNamespace = "s3-object-lambda"
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s3OutpostsNamespace = "s3-outposts"
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)
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// Used by shapes with members decorated as endpoint ARN.
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func parseEndpointARN(v string) (arn.Resource, error) {
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return arn.ParseResource(v, accessPointResourceParser)
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}
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func accessPointResourceParser(a awsarn.ARN) (arn.Resource, error) {
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resParts := arn.SplitResource(a.Resource)
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switch resParts[0] {
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case "accesspoint":
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switch a.Service {
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case s3Namespace:
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return arn.ParseAccessPointResource(a, resParts[1:])
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case s3ObjectsLambdaNamespace:
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return parseS3ObjectLambdaAccessPointResource(a, resParts)
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default:
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return arn.AccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: fmt.Sprintf("service is not %s or %s", s3Namespace, s3ObjectsLambdaNamespace)}
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}
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case "outpost":
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if a.Service != "s3-outposts" {
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return arn.OutpostAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: "service is not s3-outposts"}
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}
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return parseOutpostAccessPointResource(a, resParts[1:])
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default:
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return nil, arn.InvalidARNError{ARN: a, Reason: "unknown resource type"}
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}
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}
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// parseOutpostAccessPointResource attempts to parse the ARNs resource as an
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// outpost access-point resource.
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//
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// Supported Outpost AccessPoint ARN format:
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// - ARN format: arn:{partition}:s3-outposts:{region}:{accountId}:outpost/{outpostId}/accesspoint/{accesspointName}
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// - example: arn:aws:s3-outposts:us-west-2:012345678901:outpost/op-1234567890123456/accesspoint/myaccesspoint
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//
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func parseOutpostAccessPointResource(a awsarn.ARN, resParts []string) (arn.OutpostAccessPointARN, error) {
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// outpost accesspoint arn is only valid if service is s3-outposts
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if a.Service != "s3-outposts" {
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return arn.OutpostAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: "service is not s3-outposts"}
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}
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if len(resParts) == 0 {
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return arn.OutpostAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: "outpost resource-id not set"}
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}
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if len(resParts) < 3 {
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return arn.OutpostAccessPointARN{}, arn.InvalidARNError{
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ARN: a, Reason: "access-point resource not set in Outpost ARN",
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}
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}
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resID := strings.TrimSpace(resParts[0])
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if len(resID) == 0 {
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return arn.OutpostAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: "outpost resource-id not set"}
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}
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var outpostAccessPointARN = arn.OutpostAccessPointARN{}
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switch resParts[1] {
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case "accesspoint":
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accessPointARN, err := arn.ParseAccessPointResource(a, resParts[2:])
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if err != nil {
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return arn.OutpostAccessPointARN{}, err
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}
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// set access-point arn
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outpostAccessPointARN.AccessPointARN = accessPointARN
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default:
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return arn.OutpostAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: "access-point resource not set in Outpost ARN"}
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}
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// set outpost id
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outpostAccessPointARN.OutpostID = resID
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return outpostAccessPointARN, nil
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}
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func parseS3ObjectLambdaAccessPointResource(a awsarn.ARN, resParts []string) (arn.S3ObjectLambdaAccessPointARN, error) {
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if a.Service != s3ObjectsLambdaNamespace {
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return arn.S3ObjectLambdaAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: fmt.Sprintf("service is not %s", s3ObjectsLambdaNamespace)}
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}
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accessPointARN, err := arn.ParseAccessPointResource(a, resParts[1:])
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if err != nil {
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return arn.S3ObjectLambdaAccessPointARN{}, err
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}
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if len(accessPointARN.Region) == 0 {
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return arn.S3ObjectLambdaAccessPointARN{}, arn.InvalidARNError{ARN: a, Reason: fmt.Sprintf("%s region not set", s3ObjectsLambdaNamespace)}
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}
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return arn.S3ObjectLambdaAccessPointARN{
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AccessPointARN: accessPointARN,
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}, nil
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}
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func endpointHandler(req *request.Request) {
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endpoint, ok := req.Params.(endpointARNGetter)
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if !ok || !endpoint.hasEndpointARN() {
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updateBucketEndpointFromParams(req)
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return
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}
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resource, err := endpoint.getEndpointARN()
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if err != nil {
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req.Error = s3shared.NewInvalidARNError(nil, err)
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return
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}
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resReq := s3shared.ResourceRequest{
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Resource: resource,
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Request: req,
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}
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if len(resReq.Request.ClientInfo.PartitionID) != 0 && resReq.IsCrossPartition() {
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req.Error = s3shared.NewClientPartitionMismatchError(resource,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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return
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}
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if !resReq.AllowCrossRegion() && resReq.IsCrossRegion() {
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req.Error = s3shared.NewClientRegionMismatchError(resource,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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return
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}
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switch tv := resource.(type) {
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case arn.AccessPointARN:
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err = updateRequestAccessPointEndpoint(req, tv)
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if err != nil {
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req.Error = err
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}
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case arn.S3ObjectLambdaAccessPointARN:
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err = updateRequestS3ObjectLambdaAccessPointEndpoint(req, tv)
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if err != nil {
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req.Error = err
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}
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case arn.OutpostAccessPointARN:
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// outposts does not support FIPS regions
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if req.Config.UseFIPSEndpoint == endpoints.FIPSEndpointStateEnabled {
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req.Error = s3shared.NewFIPSConfigurationError(resource, req.ClientInfo.PartitionID,
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aws.StringValue(req.Config.Region), nil)
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return
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}
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err = updateRequestOutpostAccessPointEndpoint(req, tv)
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if err != nil {
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req.Error = err
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}
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default:
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req.Error = s3shared.NewInvalidARNError(resource, nil)
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}
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}
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func updateBucketEndpointFromParams(r *request.Request) {
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bucket, ok := bucketNameFromReqParams(r.Params)
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if !ok {
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// Ignore operation requests if the bucket name was not provided
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// if this is an input validation error the validation handler
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// will report it.
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return
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}
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updateEndpointForS3Config(r, bucket)
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}
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func updateRequestAccessPointEndpoint(req *request.Request, accessPoint arn.AccessPointARN) error {
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// Accelerate not supported
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if aws.BoolValue(req.Config.S3UseAccelerate) {
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return s3shared.NewClientConfiguredForAccelerateError(accessPoint,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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}
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// Ignore the disable host prefix for access points
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req.Config.DisableEndpointHostPrefix = aws.Bool(false)
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if err := accessPointEndpointBuilder(accessPoint).build(req); err != nil {
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return err
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}
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removeBucketFromPath(req.HTTPRequest.URL)
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return nil
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}
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func updateRequestS3ObjectLambdaAccessPointEndpoint(req *request.Request, accessPoint arn.S3ObjectLambdaAccessPointARN) error {
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// DualStack not supported
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if isUseDualStackEndpoint(req) {
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return s3shared.NewClientConfiguredForDualStackError(accessPoint,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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}
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// Accelerate not supported
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if aws.BoolValue(req.Config.S3UseAccelerate) {
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return s3shared.NewClientConfiguredForAccelerateError(accessPoint,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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}
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// Ignore the disable host prefix for access points
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req.Config.DisableEndpointHostPrefix = aws.Bool(false)
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if err := s3ObjectLambdaAccessPointEndpointBuilder(accessPoint).build(req); err != nil {
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return err
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}
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removeBucketFromPath(req.HTTPRequest.URL)
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return nil
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}
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func updateRequestOutpostAccessPointEndpoint(req *request.Request, accessPoint arn.OutpostAccessPointARN) error {
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// Accelerate not supported
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if aws.BoolValue(req.Config.S3UseAccelerate) {
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return s3shared.NewClientConfiguredForAccelerateError(accessPoint,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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}
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// Dualstack not supported
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if isUseDualStackEndpoint(req) {
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return s3shared.NewClientConfiguredForDualStackError(accessPoint,
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req.ClientInfo.PartitionID, aws.StringValue(req.Config.Region), nil)
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}
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// Ignore the disable host prefix for access points
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req.Config.DisableEndpointHostPrefix = aws.Bool(false)
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if err := outpostAccessPointEndpointBuilder(accessPoint).build(req); err != nil {
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return err
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}
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removeBucketFromPath(req.HTTPRequest.URL)
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return nil
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}
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func removeBucketFromPath(u *url.URL) {
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u.Path = strings.Replace(u.Path, "/{Bucket}", "", -1)
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if u.Path == "" {
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u.Path = "/"
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}
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}
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func buildWriteGetObjectResponseEndpoint(req *request.Request) {
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// DualStack not supported
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if isUseDualStackEndpoint(req) {
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req.Error = awserr.New("ConfigurationError", "client configured for dualstack but not supported for operation", nil)
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return
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}
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// Accelerate not supported
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if aws.BoolValue(req.Config.S3UseAccelerate) {
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req.Error = awserr.New("ConfigurationError", "client configured for accelerate but not supported for operation", nil)
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return
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}
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signingName := s3ObjectsLambdaNamespace
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signingRegion := req.ClientInfo.SigningRegion
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if !hasCustomEndpoint(req) {
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endpoint, err := resolveRegionalEndpoint(req, aws.StringValue(req.Config.Region), req.ClientInfo.ResolvedRegion, EndpointsID)
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if err != nil {
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req.Error = awserr.New(request.ErrCodeSerialization, "failed to resolve endpoint", err)
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return
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}
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signingRegion = endpoint.SigningRegion
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if err = updateRequestEndpoint(req, endpoint.URL); err != nil {
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req.Error = err
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return
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}
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updateS3HostPrefixForS3ObjectLambda(req)
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}
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redirectSigner(req, signingName, signingRegion)
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}
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func isUseDualStackEndpoint(req *request.Request) bool {
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if req.Config.UseDualStackEndpoint != endpoints.DualStackEndpointStateUnset {
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return req.Config.UseDualStackEndpoint == endpoints.DualStackEndpointStateEnabled
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}
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return aws.BoolValue(req.Config.UseDualStack)
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}
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