fix xml

app/controller/course/v5/wechat.js

@@ -15,8 +15,13 @@ class WechatController extends Controller {
 
   async callbackAction() {
     const { ctx, service } = this;
-    await service.course.v5.wechat.callbackAction();
-    ctx.success('success');
+    const ret = await service.course.v5.wechat.callbackAction();
+    if (ctx.isEmpty(ret)) {
+      ctx.success('success');
+    } else {
+      ctx.set('content-type', 'text/xml');
+      ctx.body = ret;
+    }
   }
 
   async check() {

app/service/course/v5/wechat.js

@@ -26,9 +26,10 @@ class WechatService extends Service {
   }
 
   async callbackAction() {
-    const { ctx, app } = this;
+    const { ctx } = this;
     ctx.logger.info('course_wechat_v5_receive: ' + JSON.stringify(ctx.request.body));
-    await this.sendMsg(ctx.request.body);
+    const ret = await this.sendMsg(ctx.request.body);
+    return ret;
   }
 
   async sendMsg(data) {
@@ -49,12 +50,11 @@ class WechatService extends Service {
     }
 
     if (!flag) {
-      this.ctx.set('content-type', 'text/xml');
       const xml = `<xml><ToUserName><![CDATA[${data.FromUserName}]]></ToUserName><FromUserName><![CDATA[${data.ToUserName}]]></FromUserName><CreateTime>${parseInt(new Date() / 1000)}</CreateTime><MsgType><![CDATA[transfer_customer_service]]></MsgType></xml>`;
-      this.ctx.body = xml;
       ctx.logger.info('course_ctx: ' + xml);
+      return xml;
     }
-    // return;
+    return '';
   }
 
   async sendText(data) {