Allow forcing path style for s3 compatible API requests.

cache/s3/s3.go

@@ -40,6 +40,7 @@ const (
  ConfigKeyACL = "access_control_list" // defaults to ""
  ConfigKeyCacheControl = "cache_control" // defaults to ""
  ConfigKeyContentType = "content_type" // defaults to "application/vnd.mapbox-vector-tile"
+ ConfigKeyS3ForcePath = "force_path_style"
 )
 
 const (
@@ -49,6 +50,7 @@ const (
  DefaultSecretKey = ""
  DefaultContentType = mvt.MimeType
  DefaultEndpoint = ""
+ DefaultS3ForcePath = false
 )
 
 // testData is used during New() to confirm the ability to write, read and purge the cache
@@ -151,6 +153,14 @@ func New(config dict.Dicter) (cache.Interface, error) {
  awsConfig.Endpoint = aws.String(endpoint)
  }
 
+ s3ForcePathStyle := DefaultS3ForcePath
+ s3ForcePathStyle, err = config.Bool(ConfigKeyS3ForcePath, &s3ForcePathStyle)
+ if err != nil {
+ return nil, err
+ }
+
+ awsConfig.S3ForcePathStyle = aws.Bool(s3ForcePathStyle)
+
  // setup the s3 session.
  // if the accessKey and secreteKey are not provided (static creds) then the provider chain is used
  // http://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html