diff --git a/index.js b/index.js
index 8ca30e2..ecf2ea7 100644
--- a/index.js
+++ b/index.js
@@ -12,6 +12,8 @@ import URL from 'url'
 import QS from 'querystring'
 
 const tmpdir = process.cwd() + '/.tmp/'
+const encode = encodeURIComponent
+const decode = decodeURIComponent
 
 function hideProperty(host, name, value) {
   Object.defineProperty(host, name, {
@@ -56,13 +58,15 @@ export default class Request {
     let pathArr = []
     let tmpArr = []
 
+    _url = decode(_url)
+
     // URL上不允许有非法字符
     if (/[^\w\-\/\.]/.test(_url)) {
       this.origin.res.rendered = true
       this.origin.res.writeHead(400, {
-        'X-debug': 'url[' + _url + '] contains illegal characters'
+        'X-debug': `url [/${encode(_url)}] contains invalid characters`
       })
-      return this.origin.res.end('')
+      return this.origin.res.end(`Invalid characters: /${_url}`)
     }
 
     // 修正url中可能出现的"多斜杠"
diff --git a/package.json b/package.json
index 170d580..1aa13c8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gm5/request",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "对Http的request进一步封装, 提供常用的API",
   "main": "index.js",
   "author": "yutent",