修复乱码的问题

@@ -69,14 +69,7 @@ module.exports = function(proxyRoute) {
             //跳转
             ress.redirect(res.caseless.get('location'));
           }else {
-            var ContentType = res.caseless.get('Content-Type');
-            var isAttachment = res.caseless.get('content-disposition');
-            if(isAttachment && isAttachment.indexOf('attachment')>-1) {
-                request(options).pipe(ress);
-            } else {
-                ress.append('Content-Type',ContentType);
-                ress.status(res.statusCode).send(body);
-            }
+            request(options).pipe(ress);
           }
         });
       } else {