--- /dev/null
+"use strict";
+
+module.exports = exports;
+
+var url = require('url');
+
+var URI_REGEX="^(.*)\.(s3(?:-.*)?)\.amazonaws\.com$";
+
+module.exports.detect = function(to,config) {
+ var uri = url.parse(to);
+ var hostname_matches = uri.hostname.match(URI_REGEX);
+ config.prefix = (!uri.pathname || uri.pathname == '/') ? '' : uri.pathname.replace('/','');
+ if(!hostname_matches) {
+ return;
+ }
+ if (!config.bucket) {
+ config.bucket = hostname_matches[1];
+ }
+ if (!config.region) {
+ var s3_domain = hostname_matches[2];
+ if (s3_domain.slice(0,3) == 's3-' &&
+ s3_domain.length >= 3) {
+ // it appears the region is explicit in the url
+ config.region = s3_domain.replace('s3-','');
+ }
+ }
+};