修复resful请求返回值注入的Promise问题

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@bytedo/fetch",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "description": "全新的ajax封装。分2个版本, 一个基于XMLHttpRequest, 一个基于window.fetch",
   "main": "dist/index.js",
   "files": [

src/index.js

@@ -282,15 +282,21 @@ class _Request {
   __success__(isSucc, result) {
     var { body, status, statusText, headers } = result
     var response = new Response(body, { status, statusText, headers })
+    var _type
 
     if (this._owner._inject_res) {
       response = this._owner._inject_res(response)
+      _type = toS.call(response)
     }
 
     if (isSucc) {
       this.defer.resolve(response)
     } else {
-      this.defer.reject(response)
+      if (_type === '[object Promise]') {
+        return response.then(_ => this.defer.reject(_)).catch(_ => this.defer.reject(_))
+      } else {
+        this.defer.reject(response)
+      }
     }
     delete this.xhr
     delete this.options

src/next.js

@@ -179,13 +179,19 @@ class _Request {
       .then(r => {
         clearTimeout(this.timer)
         let isSucc = r.status >= 200 && r.status < 400
+        let _type
         if (this._owner._inject_res) {
           r = this._owner._inject_res(r)
+          _type = toS.call(r)
         }
         if (isSucc) {
           return r
         } else {
-          return Promise.reject(r)
+          if (_type === '[object Promise]') {
+            return r.then(_ => Promise.reject(_))
+          } else {
+            return Promise.reject(r)
+          }
         }
       })
       .catch(e => {