Only cache error pages for 1 second

app/__init__.py

@@ -1,7 +1,13 @@
 import logging
-from datetime import datetime
 
 from app.lib import cache
+from app.lib.context_processor import (
+    get_wagtail_image,
+    get_wagtail_media,
+    get_wagtail_page,
+    is_standalone,
+    now_iso_8601,
+)
 from app.lib.template_filters import (
     article_supertitle,
     article_type,
@@ -11,7 +17,6 @@
     slugify,
     tna_html,
 )
-from app.wagtail.api import image_details, media_details, page_details
 from config import Config
 from flask import Flask
 from jinja2 import ChoiceLoader, PackageLoader
@@ -44,28 +49,10 @@ def create_app(config_class=Config):
     app.add_template_filter(brand_icon_from_url)
     app.add_template_filter(headings_list)
 
-    # app.add_cms_processor(headings_list)
-
     @app.context_processor
-    def cms_processor():
-        def get_wagtail_image(image_id):
-            image_data = image_details(image_id)
-            return image_data
-
-        def get_wagtail_page(page_id):
-            page_data = page_details(page_id)
-            return page_data
-
-        def get_wagtail_media(media_id):
-            media_data = media_details(media_id)
-            return media_data
-
-        def now_iso_8601():
-            now = datetime.now()
-            now_date = now.strftime("%Y-%m-%dT%H:%M:%SZ")
-            return now_date
-
+    def context_processor():
         return dict(
+            is_standalone=is_standalone,
             get_wagtail_image=get_wagtail_image,
             get_wagtail_page=get_wagtail_page,
             get_wagtail_media=get_wagtail_media,

app/lib/context_processor.py

@@ -0,0 +1,29 @@
+from datetime import datetime
+
+from app.wagtail.api import image_details, media_details, page_details
+from flask import request
+
+
+def is_standalone():
+    return "standalone" in request.args
+
+
+def get_wagtail_image(image_id):
+    image_data = image_details(image_id)
+    return image_data
+
+
+def get_wagtail_page(page_id):
+    page_data = page_details(page_id)
+    return page_data
+
+
+def get_wagtail_media(media_id):
+    media_data = media_details(media_id)
+    return media_data
+
+
+def now_iso_8601():
+    now = datetime.now()
+    now_date = now.strftime("%Y-%m-%dT%H:%M:%SZ")
+    return now_date

app/templates/base.html

@@ -1,6 +1,7 @@
 {% extends 'layouts/base.html' %}
 
 {%- from 'components/breadcrumbs/macro.html' import tnaBreadcrumbs -%}
+{%- from 'components/button/macro.html' import tnaButton -%}
 {%- from 'components/cookie-banner/macro.html' import tnaCookieBanner -%}
 {%- from 'components/header/macro.html' import tnaHeader -%}
 {%- from 'components/footer/macro.html' import tnaFooter -%}
@@ -32,6 +33,24 @@
 {% endblock %}
 
 {% block header %}
+{% if is_standalone() %}
+<nav class="tna-background-contrast">
+  <div class="tna-container tna-!--padding-vertical-s">
+    <div class="tna-column tna-column--full">
+      <div class="tna-button-group tna-button-group--full">
+        {{ tnaButton({
+          'text': 'Explore the collection',
+          'href': '/explore-the-collection'
+        }) }}
+        {{ tnaButton({
+          'text': 'Search',
+          'href': '/search'
+        }) }}
+      </div>
+    </div>
+  </div>
+</nav>
+{% else %}
 <!-- {{ tnaPhaseBanner({
   'phase': 'prototype',
   'message': 'This is not a real service.',
@@ -66,9 +85,11 @@
   },
   'navigation': navigationItems
 }) }}
+{% endif %}
 {% endblock %}
 
 {% block beforeContent %}
+{% if not is_standalone() %}
 {% if breadcrumbs and breadcrumbs | length > 0 %}
 <div class="tna-container">
   <div class="tna-column tna-column--full">
@@ -78,9 +99,11 @@
   </div>
 </div>
 {% endif %}
+{% endif %}
 {% endblock %}
 
 {% block footer %}
+{% if not is_standalone() %}
 {{ tnaFooter({
   'social': [
     {
@@ -211,6 +234,7 @@
     }
   ]
 }) }}
+{% endif %}
 {% endblock %}
 
 {% block bodyEnd %}

app/wagtail/routes.py

@@ -1,7 +1,9 @@
 from app.lib import cache, cache_key_prefix
 from app.wagtail import bp
 from app.wagtail.render import render_content_page
-from flask import current_app, render_template, request
+from config import cache_config
+from flask import current_app, make_response, render_template, request
+from flask_caching import CachedResponse
 
 from .api import page_details_by_uri, page_preview
 
@@ -21,11 +23,22 @@ def index():
         page_data = page_details_by_uri("/")
     except ConnectionError:
         current_app.logger.error("ConnectionError for home page")
-        return render_template("errors/api.html"), 502
+        return CachedResponse(
+            response=make_response(render_template("errors/api.html"), 502),
+            timeout=1,
+        )
     except Exception:
         current_app.logger.error("An exception occurred on home page")
-        return render_template("errors/page-not-found.html"), 404
-    return render_content_page(page_data)
+        return CachedResponse(
+            response=make_response(
+                render_template("errors/page-not-found.html"), 404
+            ),
+            timeout=1,
+        )
+    return CachedResponse(
+        response=make_response(render_content_page(page_data)),
+        timeout=cache_config["CACHE_DEFAULT_TIMEOUT"],
+    )
 
 
 @bp.route("/<path:path>/")
@@ -35,8 +48,19 @@ def explore_page(path):
         page_data = page_details_by_uri(path)
     except ConnectionError:
         current_app.logger.error(f"ConnectionError for {path}")
-        return render_template("errors/api.html"), 502
+        return CachedResponse(
+            response=make_response(render_template("errors/api.html"), 502),
+            timeout=1,
+        )
     except Exception:
         current_app.logger.error(f"An exception occurred on {path}")
-        return render_template("errors/page-not-found.html"), 404
-    return render_content_page(page_data)
+        return CachedResponse(
+            response=make_response(
+                render_template("errors/page-not-found.html"), 404
+            ),
+            timeout=1,
+        )
+    return CachedResponse(
+        response=make_response(render_content_page(page_data)),
+        timeout=cache_config["CACHE_DEFAULT_TIMEOUT"],
+    )