feat: support SecondLevelDomain (#729)

Author: weiyie

lib/client.js

@@ -296,12 +296,12 @@ proto._getReqUrl = function _getReqUrl(params) {
   copy(this.options.endpoint).to(ep);
   const isIP = this._isIP(ep.hostname);
   const isCname = this.options.cname;
-  if (params.bucket && !isCname && !isIP) {
+  if (params.bucket && !isCname && !isIP && !this.options.sldEnable) {
     ep.host = `${params.bucket}.${ep.host}`;
   }
 
   let resourcePath = '/';
-  if (params.bucket && isIP) {
+  if (params.bucket && (this.options.sldEnable || isIP)) {
     resourcePath += `${params.bucket}/`;
   }
 
@@ -461,3 +461,8 @@ proto.requestError = async function requestError(result) {
   debug('generate error %j', err);
   return err;
 };
+
+proto.setSLDEnabled = function setSLDEnabled(enable) {
+  this.options.sldEnable = !!enable;
+  return this;
+};

lib/common/client/initOptions.js

@@ -46,7 +46,8 @@ module.exports = function (options) {
     bucket: null,
     endpoint: null,
     cname: false,
-    isRequestPay: false
+    isRequestPay: false,
+    sldEnable: false
   }, options);
 
   opts.accessKeyId = opts.accessKeyId.trim();