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Merge pull request #836 from aws/s3-accel-dualstack
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package s3shared | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/awslabs/smithy-go/middleware" | ||
| "github.com/awslabs/smithy-go/transport/http" | ||
| ) | ||
|
|
||
| // EnableDualstackMiddleware represents middleware struct for enabling dualstack support | ||
| type EnableDualstackMiddleware struct { | ||
| // UseDualstack indicates if dualstack endpoint resolving is to be enabled | ||
| UseDualstack bool | ||
|
|
||
| // ServiceID is the service id prefix used in endpoint resolving | ||
| // by default service-id is 's3' and 's3-control' for service s3, s3control. | ||
| ServiceID string | ||
| } | ||
|
|
||
| // ID returns the middleware ID. | ||
| func (*EnableDualstackMiddleware) ID() string { return "EnableDualstackMiddleware" } | ||
|
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| // HandleSerialize handles serializer middleware behavior when middleware is executed | ||
| func (u *EnableDualstackMiddleware) HandleSerialize( | ||
| ctx context.Context, in middleware.SerializeInput, next middleware.SerializeHandler, | ||
| ) ( | ||
| out middleware.SerializeOutput, metadata middleware.Metadata, err error, | ||
| ) { | ||
| req, ok := in.Request.(*http.Request) | ||
| if !ok { | ||
| return out, metadata, fmt.Errorf("unknown request type %T", req) | ||
| } | ||
|
|
||
| if u.UseDualstack { | ||
| parts := strings.Split(req.URL.Host, ".") | ||
| if len(parts) < 3 { | ||
| return out, metadata, fmt.Errorf("unable to update endpoint host for dualstack, hostname invalid, %s", req.URL.Host) | ||
| } | ||
|
|
||
| for i := 0; i+1 < len(parts); i++ { | ||
| if strings.EqualFold(parts[i], u.ServiceID) { | ||
| parts[i] = parts[i] + ".dualstack" | ||
| break | ||
| } | ||
| } | ||
|
|
||
| // construct the url host | ||
| req.URL.Host = strings.Join(parts, ".") | ||
| } | ||
|
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||
| return next.HandleSerialize(ctx, in) | ||
| } |
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