erp5_web_renderjs_ui: embed the dependency list in the worker code

Global are deleted when the worker is stopped, which make the current fetch code less interesting...

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_serviceworker.js

 /*jslint indent: 2*/
-/*global self, caches, fetch, Promise, URL, location*/
-(function (self, caches, fetch, Promise, URL, location) {
+/*global self, caches, fetch, Promise, URL, location, JSON*/
+(function (self, caches, fetch, Promise, URL, location, JSON) {
   "use strict";
 
   var prefix = location.toString() + '_',
     CACHE_NAME = prefix + '${modification_date}',
-    required_url_list = [];
+    REQUIRED_FILES = JSON.parse('${required_url_list}'),
+    required_url_list = [],
+    i,
+    len = REQUIRED_FILES.length;
+
+  for (i = 0; i < len; i += 1) {
+    required_url_list.push(
+      new URL(REQUIRED_FILES[i], location.toString()).toString()
+    );
+  }
 
   self.addEventListener('install', function (event) {
     // Perform install step:  loading each required file into cache
     event.waitUntil(
-      fetch('WebSection_getPrecacheManifest')
-        .then(function (response) {
-          return Promise.all([
-            response.json(),
       caches.open(CACHE_NAME)
-          ]);
-        })
-        .then(function (result_list) {
-          var required_file_dict = result_list[0],
-            cache = result_list[1],
-            key,
-            promise = Promise.resolve(),
-            url;
+        .then(function (cache) {
+          var promise = Promise.resolve();
 
-          function append(url) {
+          function append(url_to_cache) {
             promise = promise
               .then(function () {
                 // Use cache.add because safari does not support cache.addAll.
-                return cache.add(url);
+                return cache.add(url_to_cache);
               });
           }
 
-          for (key in required_file_dict) {
-            if (required_file_dict.hasOwnProperty(key)) {
-              url = new URL(key, location.toString()).toString();
+          len = required_url_list.length;
+          for (i = 0; i < len; i += 1) {
             // Add all offline dependencies to the cache
             // One by one, to not hammer zopes
-              required_url_list.push(url);
-              append(url);
-            }
+            append(required_url_list[i]);
           }
           return promise;
         })
@@ -128,4 +124,4 @@
     );
   });
 
-}(self, caches, fetch, Promise, URL, location));
\ No newline at end of file
+}(self, caches, fetch, Promise, URL, location, JSON));
\ No newline at end of file

bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_serviceworker.xml

@@ -238,7 +238,7 @@
                   </item>
                   <item>
                       <key> <string>serial</string> </key>
-                      <value> <string>981.49192.3036.63283</string> </value>
+                      <value> <string>981.49307.35014.63180</string> </value>
                   </item>
                   <item>
                       <key> <string>state</string> </key>
@@ -256,7 +256,7 @@
                           </tuple>
                           <state>
                             <tuple>
-                              <float>1581341953.03</float>
+                              <float>1581348269.23</float>
                               <string>UTC</string>
                             </tuple>
                           </state>

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebPage_viewAsWeb.py

 from DateTime import DateTime
+import json
 
 if REQUEST is None:
   REQUEST = context.REQUEST
@@ -28,8 +29,11 @@ web_content = web_page.getTextContent()
 # set headers depending on type of script
 if (portal_type == "Web Script"):
   response.setHeader('Content-Type', 'application/javascript; charset=utf-8')
+  if web_page.getTextContentSubstitutionMappingMethodId():
     web_content = web_page.TextDocument_substituteTextContent(web_content, mapping_dict={
-    'modification_date': modification_date_string
+      'modification_date': modification_date_string,
+      # Make JSLint happy for the service worker code
+      'required_url_list': json.dumps(web_section.WebSection_getPrecacheManifest())
     })
 
 elif (portal_type == "Web Style"):

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSection_getPrecacheManifest.py

-import json
-
-if REQUEST is None:
-  REQUEST = context.REQUEST
-if response is None:
-  response = REQUEST.RESPONSE
-
 web_section = context
 
 # Add all ERP5JS gadget
@@ -180,6 +173,4 @@ precache_manifest_url_list = web_section.getLayoutProperty("configuration_precac
 for precache_manifest_script_id in precache_manifest_url_list:
   url_list.extend(web_section.restrictedTraverse(precache_manifest_script_id)())
 
-result = json.dumps(dict.fromkeys(url_list, None), indent=2)
-response.setHeader('Content-Type', 'application/json')
-return result
+return url_list

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebSection_getPrecacheManifest.xml

@@ -54,7 +54,7 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>REQUEST=None, response=None</string> </value>
+            <value> <string></string> </value>
         </item>
         <item>
             <key> <string>_proxy_roles</string> </key>