From d32778952579c42597b081d62cdf44fa8e86c358 Mon Sep 17 00:00:00 2001
From: Sukka <isukkaw@gmail.com>
Date: Sat, 20 Jun 2020 16:00:32 +0800
Subject: [PATCH] fix(post): avoid swig in code being double escaped (#4362)

---
 lib/hexo/post.js          | 13 ++++++------
 test/scripts/hexo/post.js | 42 +++++++++++++++++++++++++++++++++------
 2 files changed, 43 insertions(+), 12 deletions(-)

diff --git a/lib/hexo/post.js b/lib/hexo/post.js
index 73e2328d55..5a384f8d67 100644
--- a/lib/hexo/post.js
+++ b/lib/hexo/post.js
@@ -10,6 +10,9 @@ const { slugize, escapeRegExp } = require('hexo-util');
 const { copyDir, exists, listDir, mkdirs, readFile, rmdir, unlink, writeFile } = require('hexo-fs');
 const yfm = require('hexo-front-matter');
 
+const replaceSwigTag = str => str.replace(/{/g, '\uFFFCleft\uFFFC').replace(/}/g, '\uFFFCright\uFFFC');
+const restoreReplacesSwigTag = str => str.replace(/\uFFFCleft\uFFFC/g, '&#123;').replace(/\uFFFCright\uFFFC/g, '&#125;');
+
 const preservedKeys = ['title', 'slug', 'path', 'layout', 'date', 'content'];
 
 const rPlaceholder = /(?:<|&lt;)!--\uFFFC(\d+)--(?:>|&gt;)/g;
@@ -18,7 +21,7 @@ const rSwigComment = /\{#[\s\S]*?#\}/g;
 const rSwigBlock = /\{%[\s\S]*?%\}/g;
 const rSwigFullBlock = /\{% *(.+?)(?: *| +.*?)%\}[\s\S]+?\{% *end\1 *%\}/g;
 const rSwigRawFullBlock = /{% *raw *%\}[\s\S]+?\{% *endraw *%\}/g;
-const rSwigTagInsideInlineCode = /`.*{.*}.*`/g;
+const rSwigTagInsideInlineCode = /`.*?{.*?}.*?`/g;
 
 const _escapeContent = (cache, str) => {
   const placeholder = '\uFFFC';
@@ -48,9 +51,7 @@ class PostRenderCache {
   escapeAllSwigTags(str) {
     const escape = _str => _escapeContent(this.cache, _str);
     return str.replace(rSwigRawFullBlock, escape) // Escape {% raw %} first
-      .replace(rSwigTagInsideInlineCode, str => {
-        return str.replace(/{/g, '&#123;').replace(/}/g, '&#125;');
-      })
+      .replace(rSwigTagInsideInlineCode, replaceSwigTag) // Avoid double escaped by marked renderer
       .replace(rSwigFullBlock, escape)
       .replace(rSwigBlock, escape)
       .replace(rSwigComment, '')
@@ -256,7 +257,6 @@ class Post {
 
     return promise.then(content => {
       data.content = content;
-
       // Run "before_post_render" filters
       return ctx.execFilter('before_post_render', data, { context: ctx });
     }).then(() => {
@@ -277,7 +277,7 @@ class Post {
         toString: true,
         onRenderEnd(content) {
           // Replace cache data with real contents
-          data.content = cacheObj.loadContent(content);
+          data.content = cacheObj.loadContent(restoreReplacesSwigTag(content));
 
           // Return content after replace the placeholders
           if (disableNunjucks) return data.content;
@@ -287,6 +287,7 @@ class Post {
         }
       }, options);
     }).then(content => {
+      // restore { and } inside inline code
       data.content = content;
 
       // Run "after_post_render" filters
diff --git a/test/scripts/hexo/post.js b/test/scripts/hexo/post.js
index 0311c1e00b..8ff492f694 100644
--- a/test/scripts/hexo/post.js
+++ b/test/scripts/hexo/post.js
@@ -8,6 +8,7 @@ const { highlight, escapeHTML } = require('hexo-util');
 const { spy, useFakeTimers } = require('sinon');
 const frontMatter = require('hexo-front-matter');
 const fixture = require('../../fixtures/post_render');
+const escapeSwigTag = str => str.replace(/{/g, '&#123;').replace(/}/g, '&#125;');
 
 describe('Post', () => {
   const Hexo = require('../../../lib/hexo');
@@ -455,8 +456,8 @@ describe('Post', () => {
     const paths = [join(hexo.source_dir, '_posts', 'Hello-World-1.md')];
 
     return Promise.all([
-      post.create({title: 'Hello World', layout: 'draft'}),
-      post.create({title: 'Hello World'})
+      post.create({ title: 'Hello World', layout: 'draft' }),
+      post.create({ title: 'Hello World' })
     ]).then(data => {
       paths.push(data[1].path);
 
@@ -473,8 +474,8 @@ describe('Post', () => {
     const path = join(hexo.source_dir, '_posts', 'Hello-World.md');
 
     return Promise.all([
-      post.create({title: 'Hello World', layout: 'draft'}),
-      post.create({title: 'Hello World'})
+      post.create({ title: 'Hello World', layout: 'draft' }),
+      post.create({ title: 'Hello World' })
     ]).then(data => post.publish({
       slug: 'Hello-World'
     }, true)).then(data => {
@@ -1015,7 +1016,7 @@ describe('Post', () => {
       engine: 'markdown'
     });
 
-    data.content.trim().should.eql('<p>In Go’s templates, blocks look like this: <code>&amp;#123;&amp;#123;block &quot;template name&quot; .&amp;#125;&amp;#125; (content) &amp;#123;&amp;#123;end&amp;#125;&amp;#125;</code>.</p>');
+    data.content.trim().should.eql(`<p>In Go’s templates, blocks look like this: <code>${escapeSwigTag(escapeHTML('{{block "template name" .}} (content) {{end}}'))}</code>.</p>`);
   });
 
   // test for https://github.com/hexojs/hexo/issues/3346#issuecomment-595497849
@@ -1027,7 +1028,7 @@ describe('Post', () => {
       engine: 'markdown'
     });
 
-    data.content.trim().should.eql('<p><code>&amp;#123;&amp;#123; 1 + 1 &amp;#125;&amp;#125;</code> 2</p>');
+    data.content.trim().should.eql(`<p><code>${escapeSwigTag('{{ 1 + 1 }}')}</code> 2</p>`);
   });
 
   // https://github.com/hexojs/hexo/issues/4317
@@ -1083,6 +1084,35 @@ describe('Post', () => {
     data.content.trim().should.contains(highlightedHtml);
   });
 
+  it('render() - escape & recover muilt {% raw %} and backticks', async () => {
+    const content = [
+      '`{{ 1 + 1 }}` {{ 1 + 2 }} `{{ 2 + 2 }}`',
+      'Text',
+      '{% raw %}',
+      'Raw 1',
+      '{% endraw %}',
+      'Another Text',
+      '{% raw %}',
+      'Raw 2',
+      '{% endraw %}'
+    ].join('\n');
+
+    const data = await post.render(null, {
+      content,
+      engine: 'markdown'
+    });
+
+    data.content.trim().should.eql([
+      `<p><code>${escapeSwigTag('{{ 1 + 1 }}')}</code> 3 <code>${escapeSwigTag('{{ 2 + 2 }}')}</code><br>Text</p>`,
+      '',
+      'Raw 1',
+      '',
+      '<p>Another Text</p>',
+      '',
+      'Raw 2'
+    ].join('\n'));
+  });
+
   // https://github.com/hexojs/hexo/issues/4087
   it('render() - issue #4087', async () => {
     // Adopted from https://github.com/hexojs/hexo/issues/4087#issuecomment-596999486