Added support for v4 signing to S3.

aws/aws.go

@@ -11,6 +11,7 @@ package aws
 import (
 	"errors"
 	"os"
+	"strings"
 )
 
 // Region defines the URLs where AWS services may be accessed.
@@ -30,6 +31,13 @@ type Region struct {
 	Sign                 Signer // Method which will be used to sign requests.
 }
 
+func (r Region) ResolveS3BucketEndpoint(bucketName string) string {
+	if r.S3BucketEndpoint != "" {
+		return strings.Replace(r.S3BucketEndpoint, "${bucket}", bucketName, -1)
+	}
+	return r.S3Endpoint + "/" + bucketName + "/"
+}
+
 var USEast = Region{
 	"us-east-1",
 	"https://ec2.us-east-1.amazonaws.com",

s3/export_test.go

@@ -18,10 +18,6 @@ func AttemptStrategy() aws.AttemptStrategy {
 	return attempts
 }
 
-func Sign(auth aws.Auth, method, path string, params, headers map[string][]string) {
-	sign(auth, method, path, params, headers)
-}
-
 func SetListPartsMax(n int) {
 	listPartsMax = n
 }