启动的时候检查截图与数据库的状态是否保持一致

app.js

@@ -75,7 +75,7 @@ app.use(function(err, req, res, next) {
         error: {}
     });
 });
-
+api.checkSnapState();
 api.getSnapByTimer();
 
 module.exports = app;

database/db.js

@@ -561,6 +561,21 @@ db.getTagsBookmarks = function(bookmark_ids) {
     });
 }
 
+db.getBookmarks = function() {
+    var sql = "SELECT id, snap_state FROM `bookmarks`"; // 如果是空的，那查一个不存在的就行了。
+    console.log('getBookmarks', sql);
+
+    return new Promise(function(resolve, reject) {
+        client.query(sql, (err, result) => {
+            if (err) {
+                reject(err);
+            } else {
+                resolve(result);
+            }
+        });
+    });
+}
+
 db.getBookmarkWaitSnap = function(today) {
     var todayNotSnap = today + 31;
     var sql = "SELECT id, url, snap_state FROM `bookmarks` WHERE `snap_state`>=0 AND `snap_state` <= 64  AND snap_state != " + todayNotSnap + " ORDER BY created_at DESC LIMIT 0, 1";

routes/api.js

@@ -617,6 +617,23 @@ api.post('/getTitle', function(req, response) {
     });
 })
 
+api.checkSnapState = function() {
+    db.getBookmarks()
+        .then((bookmarks) => {
+            bookmarks.forEach(bookmark => {
+                var id = bookmark.id;
+                var snap_state = bookmark.snap_state;
+                var finePath = './public/images/snap/' + id + '.png'
+                fs.exists(finePath, function(exists) {
+                    if (!exists && snap_state == -1) {
+                        db.updateBookmarkSnapState(id, 0);
+                    }
+                });
+            })
+        })
+        .catch((err) => console.log('getBookmarks err', err));
+}
+
 api.getSnapByTimer = function() {
     console.log('getSnapByTimer...........');
     var timeout = 5000