240 lines
8.2 KiB
Go
240 lines
8.2 KiB
Go
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package s3
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import (
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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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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/aws/endpoints"
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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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"github.com/aws/aws-sdk-go/private/protocol"
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)
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const (
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accessPointPrefixLabel = "accesspoint"
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accountIDPrefixLabel = "accountID"
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accessPointPrefixTemplate = "{" + accessPointPrefixLabel + "}-{" + accountIDPrefixLabel + "}."
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outpostPrefixLabel = "outpost"
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outpostAccessPointPrefixTemplate = accessPointPrefixTemplate + "{" + outpostPrefixLabel + "}."
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)
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// hasCustomEndpoint returns true if endpoint is a custom endpoint
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func hasCustomEndpoint(r *request.Request) bool {
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return len(aws.StringValue(r.Config.Endpoint)) > 0
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}
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// accessPointEndpointBuilder represents the endpoint builder for access point arn
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type accessPointEndpointBuilder arn.AccessPointARN
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// build builds the endpoint for corresponding access point arn
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//
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// For building an endpoint from access point arn, format used is:
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// - Access point endpoint format : {accesspointName}-{accountId}.s3-accesspoint.{region}.{dnsSuffix}
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// - example : myaccesspoint-012345678901.s3-accesspoint.us-west-2.amazonaws.com
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//
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// Access Point Endpoint requests are signed using "s3" as signing name.
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func (a accessPointEndpointBuilder) build(req *request.Request) error {
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resolveService := arn.AccessPointARN(a).Service
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resolveRegion := arn.AccessPointARN(a).Region
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endpoint, err := resolveRegionalEndpoint(req, resolveRegion, "", resolveService)
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if err != nil {
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return s3shared.NewFailedToResolveEndpointError(arn.AccessPointARN(a),
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req.ClientInfo.PartitionID, resolveRegion, err)
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}
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endpoint.URL = endpoints.AddScheme(endpoint.URL, aws.BoolValue(req.Config.DisableSSL))
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if !hasCustomEndpoint(req) {
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if err = updateRequestEndpoint(req, endpoint.URL); err != nil {
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return err
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}
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// dual stack provided by endpoint resolver
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updateS3HostForS3AccessPoint(req)
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}
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protocol.HostPrefixBuilder{
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Prefix: accessPointPrefixTemplate,
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LabelsFn: a.hostPrefixLabelValues,
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}.Build(req)
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// signer redirection
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redirectSigner(req, endpoint.SigningName, endpoint.SigningRegion)
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err = protocol.ValidateEndpointHost(req.Operation.Name, req.HTTPRequest.URL.Host)
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if err != nil {
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return s3shared.NewInvalidARNError(arn.AccessPointARN(a), err)
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}
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return nil
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}
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func (a accessPointEndpointBuilder) hostPrefixLabelValues() map[string]string {
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return map[string]string{
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accessPointPrefixLabel: arn.AccessPointARN(a).AccessPointName,
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accountIDPrefixLabel: arn.AccessPointARN(a).AccountID,
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}
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}
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// s3ObjectLambdaAccessPointEndpointBuilder represents the endpoint builder for an s3 object lambda access point arn
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type s3ObjectLambdaAccessPointEndpointBuilder arn.S3ObjectLambdaAccessPointARN
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// build builds the endpoint for corresponding access point arn
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//
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// For building an endpoint from access point arn, format used is:
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// - Access point endpoint format : {accesspointName}-{accountId}.s3-object-lambda.{region}.{dnsSuffix}
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// - example : myaccesspoint-012345678901.s3-object-lambda.us-west-2.amazonaws.com
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//
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// Access Point Endpoint requests are signed using "s3-object-lambda" as signing name.
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func (a s3ObjectLambdaAccessPointEndpointBuilder) build(req *request.Request) error {
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resolveRegion := arn.S3ObjectLambdaAccessPointARN(a).Region
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endpoint, err := resolveRegionalEndpoint(req, resolveRegion, "", EndpointsID)
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if err != nil {
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return s3shared.NewFailedToResolveEndpointError(arn.S3ObjectLambdaAccessPointARN(a),
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req.ClientInfo.PartitionID, resolveRegion, err)
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}
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endpoint.URL = endpoints.AddScheme(endpoint.URL, aws.BoolValue(req.Config.DisableSSL))
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endpoint.SigningName = s3ObjectsLambdaNamespace
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if !hasCustomEndpoint(req) {
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if err = updateRequestEndpoint(req, endpoint.URL); err != nil {
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return err
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}
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updateS3HostPrefixForS3ObjectLambda(req)
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}
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protocol.HostPrefixBuilder{
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Prefix: accessPointPrefixTemplate,
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LabelsFn: a.hostPrefixLabelValues,
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}.Build(req)
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// signer redirection
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redirectSigner(req, endpoint.SigningName, endpoint.SigningRegion)
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err = protocol.ValidateEndpointHost(req.Operation.Name, req.HTTPRequest.URL.Host)
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if err != nil {
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return s3shared.NewInvalidARNError(arn.S3ObjectLambdaAccessPointARN(a), err)
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}
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return nil
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}
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func (a s3ObjectLambdaAccessPointEndpointBuilder) hostPrefixLabelValues() map[string]string {
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return map[string]string{
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accessPointPrefixLabel: arn.S3ObjectLambdaAccessPointARN(a).AccessPointName,
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accountIDPrefixLabel: arn.S3ObjectLambdaAccessPointARN(a).AccountID,
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}
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}
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// outpostAccessPointEndpointBuilder represents the Endpoint builder for outpost access point arn.
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type outpostAccessPointEndpointBuilder arn.OutpostAccessPointARN
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// build builds an endpoint corresponding to the outpost access point arn.
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//
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// For building an endpoint from outpost access point arn, format used is:
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// - Outpost access point endpoint format : {accesspointName}-{accountId}.{outpostId}.s3-outposts.{region}.{dnsSuffix}
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// - example : myaccesspoint-012345678901.op-01234567890123456.s3-outposts.us-west-2.amazonaws.com
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//
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// Outpost AccessPoint Endpoint request are signed using "s3-outposts" as signing name.
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func (o outpostAccessPointEndpointBuilder) build(req *request.Request) error {
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resolveRegion := o.Region
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resolveService := o.Service
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endpointsID := resolveService
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if resolveService == s3OutpostsNamespace {
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endpointsID = "s3"
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}
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endpoint, err := resolveRegionalEndpoint(req, resolveRegion, "", endpointsID)
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if err != nil {
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return s3shared.NewFailedToResolveEndpointError(o,
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req.ClientInfo.PartitionID, resolveRegion, err)
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}
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endpoint.URL = endpoints.AddScheme(endpoint.URL, aws.BoolValue(req.Config.DisableSSL))
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if !hasCustomEndpoint(req) {
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if err = updateRequestEndpoint(req, endpoint.URL); err != nil {
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return err
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}
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updateHostPrefix(req, endpointsID, resolveService)
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}
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protocol.HostPrefixBuilder{
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Prefix: outpostAccessPointPrefixTemplate,
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LabelsFn: o.hostPrefixLabelValues,
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}.Build(req)
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// set the signing region, name to resolved names from ARN
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redirectSigner(req, resolveService, resolveRegion)
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err = protocol.ValidateEndpointHost(req.Operation.Name, req.HTTPRequest.URL.Host)
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if err != nil {
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return s3shared.NewInvalidARNError(o, err)
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}
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return nil
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}
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func (o outpostAccessPointEndpointBuilder) hostPrefixLabelValues() map[string]string {
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return map[string]string{
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accessPointPrefixLabel: o.AccessPointName,
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accountIDPrefixLabel: o.AccountID,
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outpostPrefixLabel: o.OutpostID,
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}
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}
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func resolveRegionalEndpoint(r *request.Request, region, resolvedRegion, endpointsID string) (endpoints.ResolvedEndpoint, error) {
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return r.Config.EndpointResolver.EndpointFor(endpointsID, region, func(opts *endpoints.Options) {
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opts.DisableSSL = aws.BoolValue(r.Config.DisableSSL)
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opts.UseDualStack = aws.BoolValue(r.Config.UseDualStack)
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opts.UseDualStackEndpoint = r.Config.UseDualStackEndpoint
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opts.UseFIPSEndpoint = r.Config.UseFIPSEndpoint
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opts.S3UsEast1RegionalEndpoint = endpoints.RegionalS3UsEast1Endpoint
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opts.ResolvedRegion = resolvedRegion
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opts.Logger = r.Config.Logger
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opts.LogDeprecated = r.Config.LogLevel.Matches(aws.LogDebugWithDeprecated)
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})
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}
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func updateRequestEndpoint(r *request.Request, endpoint string) (err error) {
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r.HTTPRequest.URL, err = url.Parse(endpoint + r.Operation.HTTPPath)
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if err != nil {
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return awserr.New(request.ErrCodeSerialization,
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"failed to parse endpoint URL", err)
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}
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return nil
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}
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// redirectSigner sets signing name, signing region for a request
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func redirectSigner(req *request.Request, signingName string, signingRegion string) {
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req.ClientInfo.SigningName = signingName
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req.ClientInfo.SigningRegion = signingRegion
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}
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func updateS3HostForS3AccessPoint(req *request.Request) {
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updateHostPrefix(req, "s3", s3AccessPointNamespace)
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}
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func updateS3HostPrefixForS3ObjectLambda(req *request.Request) {
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updateHostPrefix(req, "s3", s3ObjectsLambdaNamespace)
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}
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func updateHostPrefix(req *request.Request, oldEndpointPrefix, newEndpointPrefix string) {
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host := req.HTTPRequest.URL.Host
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if strings.HasPrefix(host, oldEndpointPrefix) {
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// replace service hostlabel oldEndpointPrefix to newEndpointPrefix
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req.HTTPRequest.URL.Host = newEndpointPrefix + host[len(oldEndpointPrefix):]
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}
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}
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