editor/server: add meta information in user-created pages

editor/server/share.py

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: MIT
 
+import html
 import random
 import string
 
@@ -10,14 +11,38 @@ from flask import (
     jsonify,
     url_for,
 )
+from jinja2 import Environment, select_autoescape
 
-from . import get_common_cf_template_params, render_cf_error_page
+from cloudflare_error_page import render as render_cf_error_page, fill_params, default_template as cf_template
+
+from . import get_common_cf_template_params
 from . import db
 from . import limiter
 from . import models
 
 # root_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../')
 # examples_dir = os.path.join(root_dir, 'examples')
+env = Environment(
+    autoescape=select_autoescape(),
+    trim_blocks=True,
+    lstrip_blocks=True,
+)
+template = env.from_string('''
+{% extends base %}
+
+{% block header %}
+<meta property="og:type" content="website" />
+<meta property="og:site_name" content="moe::virt" />
+<meta property="og:title" content="{{ html_title }}" />
+<meta property="og:url" content="{{ url }}" />
+<meta property="og:description" content="{{ description }}" />
+
+<meta property="twitter:card" content="summary" />
+<meta property="twitter:site" content="moe::virt" />
+<meta property="twitter:title" content="{{ html_title }}" />
+<meta property="twitter:description" content="{{ description }}" />
+{% endblock %}
+''')
 
 bp = Blueprint('share', __name__, url_prefix='/')
 
@@ -68,19 +93,10 @@ def get(name: str):
             })
         else:
             return abort(404)
-    params = item.params
-    params = {
-        **params,
-        **get_common_cf_template_params(),
-    }
+    params: dict = item.params
     params.pop('time')
     params.pop('ray_id')
     params.pop('client_ip')
-    params['creator_info'] = {
-        'hidden': False,
-        'text': 'CF Error Page Editor',
-        'link': f'https://virt.moe/cloudflare-error-page/editor/#from={name}',
-    }
     
     if is_json:
         return jsonify({
@@ -88,4 +104,22 @@ def get(name: str):
             'parameters': params,
         })
     else:
-        return render_cf_error_page(params=params, allow_html=False, use_cdn=True), 200
+        params = {
+            **params,
+            **get_common_cf_template_params(),
+        }
+        params['creator_info'] = {
+            'hidden': False,
+            'text': 'CF Error Page Editor',
+            'link': f'https://virt.moe/cloudflare-error-page/editor/#from={name}',
+        }
+        fill_params(params)
+        params['what_happened'] = html.escape(params.get('what_happened', '')) # TODO: common render function?
+        params['what_can_i_do'] = html.escape(params.get('what_can_i_do', ''))
+
+        return template.render(base=cf_template,
+                               params=params,
+                               url=request.url,
+                               description='Cloudflare error page',
+                               resources_use_cdn=True)
+        # return render_cf_error_page(params=params, allow_html=False, use_cdn=True), 200