修改getBase64Image接口

@@ -337,7 +337,7 @@ const shoes = {
               };
               let canUpdate = false;
 
-              for (let i = 0; i < list.length; i ++) {
+              for (let i = 0; i < list.length; i++) {
                 newScoreInfo.score += parseInt(list[i].isCorrect, 10) ? 10 : 0;
                 newScoreInfo.playTime += list[i].time;
                 newScoreInfo.clickTimes += list[i].cts || 1;
@@ -345,10 +345,10 @@ const shoes = {
 
               if (newScoreInfo.score > scoreInfo.score) { // 分数比原来高的情况
                 canUpdate = true;
-              } else if (newScoreInfo.score === scoreInfo.score){ // 分数和原来相同时，看点击次数多少
+              } else if (newScoreInfo.score === scoreInfo.score) { // 分数和原来相同时，看点击次数多少
                 if (newScoreInfo.clickTimes < scoreInfo.clickTimes) { // 点击次数少于原来
                   canUpdate = true;
-                } else if (newScoreInfo.clickTimes === scoreInfo.clickTimes){ // 点击次数等于原来，看时间长短
+                } else if (newScoreInfo.clickTimes === scoreInfo.clickTimes) { // 点击次数等于原来，看时间长短
                   if (newScoreInfo.playTime < scoreInfo.playTime) {
                     canUpdate = true;
                   }
@@ -546,7 +546,7 @@ const shoes = {
         });
     },
 
-    async getImageData(req, res) {
+    async getImageData(req, res, next) {
 
         let pic_url = req.query.image;
 
@@ -581,7 +581,7 @@ const shoes = {
                 data: result
             });
         }).catch(err => {
-          return res.json(err);
+          next(err);
         });
     },