From ad6982e77e1948bd7b74538af0c5a24120a38370 Mon Sep 17 00:00:00 2001
From: Cheng-Han, Wu
Date: Tue, 21 Jun 2016 21:37:56 +0800
Subject: Remove robot meta on note edit page and html template, add prevent
 crawling header to enhance note privacy

---
 lib/response.js       |  4 ++--
 public/js/extra.js    | 13 -------------
 public/views/head.ejs |  3 ---
 public/views/html.hbs |  1 -
 4 files changed, 2 insertions(+), 19 deletions(-)

diff --git a/lib/response.js b/lib/response.js
index 3064d321..5d7fc0a1 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -123,7 +123,6 @@ function responseHackMD(res, note) {
         url: config.serverurl,
         title: title,
         useCDN: config.usecdn,
-        robots: (meta && meta.robots) || false, //default allow robots
         facebook: config.facebook,
         twitter: config.twitter,
         github: config.github,
@@ -135,7 +134,8 @@ function responseHackMD(res, note) {
     res.writeHead(200, {
         'Content-Type': 'text/html; charset=UTF-8',
         'Cache-Control': 'private',
-        'Content-Length': buf.length
+        'Content-Length': buf.length,
+        'X-Robots-Tag': 'noindex, nofollow' // prevent crawling
     });
     res.end(buf);
 }
diff --git a/public/js/extra.js b/public/js/extra.js
index 48e474a7..953770be 100644
--- a/public/js/extra.js
+++ b/public/js/extra.js
@@ -81,29 +81,17 @@ function slugifyWithUTF8(text) {
 
 //parse meta
 function parseMeta(md, edit, view, toc, tocAffix) {
-    var robots = null;
     var lang = null;
     var dir = null;
     var breaks = true;
     var spellcheck = false;
     if (md && md.meta) {
         var meta = md.meta;
-        robots = meta.robots;
         lang = meta.lang;
         dir = meta.dir;
         breaks = meta.breaks;
         spellcheck = meta.spellcheck;
     }
-    //robots meta
-    var robotsMeta = $('meta[name=robots]');
-    if (robots) {
-        if (robotsMeta.length > 0)
-            robotsMeta.attr('content', robots);
-        else
-            $('head').prepend('<meta name="robots" content="' + robots + '">')
-    }
-    else
-        robotsMeta.remove();
     //text language
     if (lang) {
         view.attr('lang', lang);
@@ -504,7 +492,6 @@ function exportToHTML(view) {
                 html: src[0].outerHTML,
                 toc: toc.html(),
                 'toc-affix': tocAffix.html(),
-                robots: (md && md.meta && md.meta.robots) ? '<meta name="robots" content="' + md.meta.robots + '">' : null,
                 lang: (md && md.meta && md.meta.lang) ? 'lang="' + md.meta.lang + '"' : null,
                 dir: (md && md.meta && md.meta.dir) ? 'dir="' + md.meta.dir + '"' : null
             };
diff --git a/public/views/head.ejs b/public/views/head.ejs
index 3dcf4866..70f6455d 100644
--- a/public/views/head.ejs
+++ b/public/views/head.ejs
@@ -4,9 +4,6 @@
 <meta name="apple-mobile-web-app-capable" content="yes">
 <meta name="apple-mobile-web-app-status-bar-style" content="black">
 <meta name="mobile-web-app-capable" content="yes">
-<% if(typeof robots !== 'undefined' && robots) { %>
-<meta name="robots" content="<%- robots %>">
-<% } %>
 <title><%- title %></title>
 <link rel="icon" type="image/png" href="<%- url %>/favicon.png">
 <link rel="apple-touch-icon" href="<%- url %>/apple-touch-icon.png">
diff --git a/public/views/html.hbs b/public/views/html.hbs
index 33fbd536..f6e57497 100644
--- a/public/views/html.hbs
+++ b/public/views/html.hbs
@@ -9,7 +9,6 @@
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="apple-mobile-web-app-status-bar-style" content="black">
     <meta name="mobile-web-app-capable" content="yes">
-    {{{robots}}}
     <title>
         {{title}}
     </title>
-- 
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