Add info api for note

lib/response.js

@@ -294,6 +294,35 @@ function actionDownload(req, res, note) {
         'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
     });
     res.end(body);
+
+function actionInfo(req, res, note) {
+    var body = LZString.decompressFromBase64(note.content);
+    var meta = null;
+    try {
+        meta = models.Note.parseMeta(metaMarked(body).meta);
+    } catch(err) {
+        //na
+    }
+    if (!meta) meta = {};
+    var createtime = note.createdAt;
+    var updatetime = note.lastchangeAt;
+    var text = S(body).escapeHTML().s;
+    var title = models.Note.decodeTitle(note.title);
+    var data = {
+        title: meta.title || title,
+        description: meta.description,
+        viewcount: note.viewcount,
+        createtime: createtime,
+        updatetime: updatetime
+    };
+    res.set({
+        'Access-Control-Allow-Origin': '*', //allow CORS as API
+        'Access-Control-Allow-Headers': 'Range',
+        'Access-Control-Expose-Headers': 'Cache-Control, Content-Encoding, Content-Range',
+        'Cache-Control': 'private',
+        'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
+    });
+    res.send(data);
 }
 
 function actionPDF(req, res, note) {
@@ -382,6 +411,9 @@ function noteActions(req, res, next) {
         case "download":
             actionDownload(req, res, note);
             break;
+        case "info":
+            actionInfo(req, res, note);
+            break;
         case "pdf":
             actionPDF(req, res, note);
             break;