[erp5_officejs_appstore_base] Cache the base redirection site in the CDN

Change the caching policy to one hour.

Use the CDN to publish the page if the backend is down

Cache the manifest like the HTML page but force refreshing the manifest to prevent CDN cache inconsistency.

bt5/erp5_officejs_appstore_base/PathTemplateItem/web_site_module/application-list/template.xml

@@ -170,7 +170,7 @@
             <value>
               <tuple>
                 <string>aggregate/web_page_module/gadget_ojs_appstore_redirect_page_html</string>
-                <string>caching_policy/must-revalidate</string>
+                <string>caching_policy/one-hour-max-modification-date</string>
               </tuple>
             </value>
         </item>
@@ -419,7 +419,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>959.46472.13801.63641</string> </value>
+                <value> <string>975.65259.47363.59801</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -437,7 +437,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1496149454.25</float>
+                        <float>1559055460.25</float>
                         <string>UTC</string>
                       </tuple>
                     </state>

bt5/erp5_officejs_appstore_base/SkinTemplateItem/portal_skins/erp5_officejs_appstore_base/WebSection_renderOfficeJSRedirectAppCache.py

@@ -4,13 +4,14 @@ if response is None:
   response = REQUEST.RESPONSE
 
 web_section = context
+modification_date = max(web_section.Base_getWebDocumentDrivenModificationDate(), DateTime().earliestTime()  + (DateTime().hour() /24.0)).rfc822()
 
-if REQUEST.getHeader('If-Modified-Since', '') == web_section.getModificationDate().rfc822():
+if REQUEST.getHeader('If-Modified-Since', '') == modification_date:
   response.setStatus(304)
   return ""
 
 response.setHeader('Content-Type', 'text/cache-manifest')
-response.setHeader('Cache-Control', 'max-age=0, public, must-revalidate')
+response.setHeader('Cache-Control', 'max-age=600, stale-while-revalidate=360000, stale-if-error=31536000, public')
 
 return """CACHE MANIFEST
-# %s + hash""" % context.getLayoutProperty("configuration_latest_version", default="development")
+# %s / %s""" % (context.getLayoutProperty("configuration_latest_version", default="development"), modification_date)