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package customizations
import (
"context"
"fmt"
"strconv"
"time"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// AddExpiresOnPresignedURL represents a build middleware used to assign
// expiration on a presigned URL.
type AddExpiresOnPresignedURL struct {
// Expires is time.Duration within which presigned url should be expired.
// This should be the duration in seconds the presigned URL should be considered valid for.
// By default the S3 presigned url expires in 15 minutes ie. 900 seconds.
Expires time.Duration
}
// ID representing the middleware
func (*AddExpiresOnPresignedURL) ID() string {
return "S3:AddExpiresOnPresignedURL"
}
// HandleBuild handles the build step middleware behavior
func (m *AddExpiresOnPresignedURL) HandleBuild(ctx context.Context, in middleware.BuildInput, next middleware.BuildHandler) (
out middleware.BuildOutput, metadata middleware.Metadata, err error,
) {
// if expiration is unset skip this middleware
if m.Expires == 0 {
// default to 15 * time.Minutes
m.Expires = 15 * time.Minute
}
req, ok := in.Request.(*smithyhttp.Request)
if !ok {
return out, metadata, fmt.Errorf("unknown transport type %T", req)
}
// set S3 X-AMZ-Expires header
query := req.URL.Query()
query.Set("X-Amz-Expires", strconv.FormatInt(int64(m.Expires/time.Second), 10))
req.URL.RawQuery = query.Encode()
return next.HandleBuild(ctx, in)
}
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