fix captcha

@@ -6,22 +6,28 @@
 
 const captchaService = require('../models/captcha-service');
 const helpers = global.yoho.helpers;
-const cache = global.yoho.cache;
-
-const checkAsync = (req, res) => {
-
-};
 
 // 中间件
 const requiredAPI = (req, res, next) => {
     let captchaToken = req.body.verifyCode || '';
+    let count = req.session.captchaCount;
 
+    if (count > 5) {
+        req.session.captcha = 'yoho9646';
+
+        return res.json({
+            code: 403,
+            message: '该验证码已失效'
+        });
+    }
+
+    req.session.captchaCount = count + 1;
     if (captchaToken === req.session.captcha) {
         return next();
     } else {
         return res.json({
             code: 400,
-            message: '您输入的验证码不正确！'
+            message: '请将图形验证码翻转至正确方向'
         });
     }
 };
@@ -29,7 +35,18 @@ const requiredAPI = (req, res, next) => {
 // 重定向调用
 const requiredPage = (req, res, next) => {
     let captchaToken = req.body.verifyCode || '';
+    let count = req.session.captchaCount;
+
+    if (count > 5) {
+        req.session.captcha = 'yoho9646';
 
+        return res.json({
+            code: 403,
+            message: '该验证码已失效'
+        });
+    }
+
+    req.session.captchaCount = count + 1;
     if (captchaToken === req.session.captcha) {
         return next();
     } else {
@@ -41,6 +58,7 @@ const requiredPage = (req, res, next) => {
 const generate = (req, res, next) => {
     captchaService.generateCaptcha().then((result) => {
         req.session.captcha = result.data.text;
+        req.session.captchaCount = 0;
 
         if (result.code === 200) {
             return res.json({
@@ -62,7 +80,18 @@ const generate = (req, res, next) => {
 // ajax 异步调用
 const checkAPI = (req, res) => {
     let captchaToken = req.body.verifyCode || '';
+    let count = req.session.captchaCount;
+
+    if (count > 5) {
+        req.session.captcha = 'yoho9646';
+
+        return res.json({
+            code: 403,
+            message: '该验证码已失效'
+        });
+    }
 
+    req.session.captchaCount = count + 1;
     if (captchaToken === req.session.captcha) {
         return res.json({
             code: 200,
@@ -71,7 +100,7 @@ const checkAPI = (req, res) => {
     } else {
         return res.json({
             code: 400,
-            message: '您输入的验证码不正确！'
+            message: '请将图形验证码翻转至正确方向'
         });
     }
 };

@@ -140,7 +140,7 @@ Captcha.prototype = {
             if (result.code === 200) {
                 return $.Deferred().resolve().promise(); // eslint-disable-line
             } else {
-                self.showTip();
+                self.showTip(result.message);
                 return $.Deferred().reject().promise(); //eslint-disable-line
             }
         });
@@ -185,7 +185,13 @@ Captcha.prototype = {
     /**
      *  显示错误
      */
-    showTip: function() {
+    showTip: function(msg) {
+        if (msg) {
+            this.$tip.find('.span').html(msg);
+        } else {
+            this.$tip.find('.span').html('请将图形验证码翻转至正确方向');
+        }
+
         if (this.$tip) {
             this.$tip.removeClass('hide');
         }