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erp5
Commit 431ee8e1 authored by Yusei Tahara's avatar Yusei Tahara Committed by Romain Courteaud
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[erp5_web_renderjs_ui] New client can use the latest cache without waiting for... 

[erp5_web_renderjs_ui] New client can use the latest cache without waiting for the new service worker to be activated.

And once client was associated with a cache, client keeps using the same cache.
parent 12e48ba7
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Showing with 135 additions and 26 deletions
bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_serviceworker.js
View file @ 431ee8e1
/*jslint indent: 2*/
/*global self, caches, fetch, Promise, URL, location*/
(function (self, caches, fetch, Promise, URL, location) {
/*global self, caches, fetch, Promise, URL, location, Response*/
(function (self, caches, fetch, Promise, URL, location, Response) {
"use strict";
var prefix = location.toString() + '_',
CACHE_NAME = prefix + 'Tue, 26 Mars 2019 12:00:00 GMT',
CACHE_NAME = prefix + '_0001',
CACHE_MAP = {},
// Files required to make this app work offline
REQUIRED_FILES = [
'favicon.ico',
......@@ -164,26 +165,78 @@
self.addEventListener('install', function (event) {
// Perform install step: loading each required file into cache
event.waitUntil(
caches.open(CACHE_NAME)
.then(function (cache) {
// Add all offline dependencies to the cache
return Promise.all(
REQUIRED_FILES
.map(function (url) {
/* Return a promise that's fulfilled
when each url is cached.
*/
// Use cache.add because safari does not support cache.addAll.
return cache.add(url);
caches.has(CACHE_NAME)
.then(function (result) {
if (!result) {
caches.open(CACHE_NAME)
.then(function (cache) {
// Add all offline dependencies to the cache
return Promise.all(
REQUIRED_FILES
.map(function (url) {
/* Return a promise that's fulfilled
when each url is cached.
*/
// Use cache.add because safari does not support cache.addAll.
console.log("Install " + CACHE_NAME + " = " + url);
return cache.add(url);
})
);
})
)
.then(function () {
return caches.keys();
})
.then(function (keys) {
keys = keys.filter(function (key) {return key.startsWith(prefix); });
if (keys.length === 1) {
// If there is only one cache, it means that this is the first service worker,
// thus we can do skipWaiting. And self.registration is unreliable on
// Firefox, we can't use self.registration.active
return self.skipWaiting();
}
})
.catch(function () {
caches.delete(CACHE_NAME);
throw "Download failed! Deleted " + CACHE_NAME;
});
}
})
);
});
self.addEventListener('fetch', function (event) {
var url = new URL(event.request.url);
/* When a new service worker is installed, it adds a new Cache
to Cache Storage. When a new client started using this
service worker, the new client uses the latest Cache at
that time by comparing with Cache keys. And once the client
is associated with a Cache key, it keeps using the same Cache
key, it must not use different Caches. Since service worker
is stateless, to maintain the mapping of client and Cache key,
we use Cache Storage as a persistent data store. The key of
this special Cache is `__erp5js`.
*/
var url = new URL(event.request.url),
client_id = event.clientId.toString(),
// CACHE_MAP is a temprary data store.
// This should be kept until service worker stops.
CACHE_KEY = CACHE_MAP[client_id],
ERP5JS_CACHE;
url.hash = '';
console.log("Client Id = " + client_id);
if (CACHE_KEY) {
console.log("CACHE_KEY from CACHE_MAP " + CACHE_KEY);
}
if (!client_id) {
// If Client is not supported by web browser,
// use the CACHE_NAME that is defined in this service worker.
// It means that even if there is a new Cache, but web browser
// uses the Cache that was installed by this service worker.
CACHE_KEY = CACHE_NAME;
CACHE_MAP[client_id] = CACHE_KEY;
console.log("CACHE_KEY from Service Worker " + CACHE_KEY);
}
if ((event.request.method !== 'GET') ||
(required_url_list.indexOf(url.toString()) === -1)) {
// Try not to use the untrustable fetch function
......@@ -191,7 +244,58 @@
return;
}
return event.respondWith(
caches.open(CACHE_NAME)
Promise.resolve()
.then(function () {
if (!CACHE_KEY) {
// __erp5js stores CACHE_KEY of each client.
return caches.open('__erp5js');
}
})
.then(function (erp5js_cache) {
if (erp5js_cache) {
// Service worker forget everything when it stops. So, when it started
// again, CACHE_MAP is empty, get the associated CACHE_KEY from the
// special Cache named __erp5js.
ERP5JS_CACHE = erp5js_cache;
return erp5js_cache.match(client_id);
}
})
.then(function (response) {
if (response) {
// We use Cache Storage as a persistent database.
CACHE_KEY = response.statusText;
CACHE_MAP[client_id] = CACHE_KEY;
console.log("CACHE_KEY from Cache Storage " + CACHE_KEY);
}
})
.then(function () {
if (CACHE_KEY) {
return [];
}
// If associated CACHE_KEY is not found, it means this client is a new one.
// Let's find the latest Cache.
return caches.keys();
})
.then(function (keys) {
if (!CACHE_KEY) {
keys = keys.filter(function (key) {return key.startsWith(prefix); });
console.log("KEYS = " + keys);
if (keys.length) {
CACHE_KEY = keys.sort().reverse()[0];
CACHE_MAP[client_id] = CACHE_KEY;
} else {
CACHE_KEY = CACHE_NAME;
CACHE_MAP[client_id] = CACHE_NAME;
}
// Save the associated CACHE_KEY in a persistent database because service
// worker forget everything when it stops.
ERP5JS_CACHE.put(client_id, new Response(null, {"statusText": CACHE_KEY}));
}
})
.then(function () {
// Finally we have the associated CACHE_KEY. Let's find a cached response.
return caches.open(CACHE_KEY);
})
.then(function (cache) {
// Don't give request object itself. Firefox's Cache Storage
// does not work properly when VARY contains Accept-Language.
......@@ -205,6 +309,7 @@
}
// Not in cache - return the result from the live server
// `fetch` is essentially a "fallback"
console.log("MISS " + CACHE_KEY + " " + url);
return fetch(event.request);
})
);
......@@ -221,15 +326,16 @@
*/
.keys()
.then(function (keys) {
keys = keys
.filter(function (key) {
// Filter by keys that don't start with the latest version prefix.
return key.startsWith(prefix);
})
.sort();
keys = keys.slice(0, keys.findIndex(function (element) {return element === CACHE_NAME; }));
// We return a promise that settles when all outdated caches are deleted.
return Promise.all(
keys
.filter(function (key) {
// Filter by keys that don't start with the latest version prefix.
// return !key.startsWith(version);
return ((key !== CACHE_NAME) &&
key.startsWith(prefix));
})
.map(function (key) {
/* Return a promise that's fulfilled
when each outdated cache is deleted.
......@@ -238,7 +344,10 @@
})
);
})
.then(function () {
caches.delete("__erp5js");
})
);
});
}(self, caches, fetch, Promise, URL, location));
\ No newline at end of file
}(self, caches, fetch, Promise, URL, location, Response));
\ No newline at end of file
bt5/erp5_web_renderjs_ui/PathTemplateItem/web_page_module/rjs_gadget_erp5_serviceworker.xml
View file @ 431ee8e1
......@@ -228,7 +228,7 @@
</item>
<item>
<key> <string>serial</string> </key>
<value> <string>976.12184.1503.10769</string> </value>
<value> <string>976.14183.65427.5973</string> </value>
</item>
<item>
<key> <string>state</string> </key>
......@@ -246,7 +246,7 @@
</tuple>
<state>
<tuple>
<float>1559722495.74</float>
<float>1559839835.03</float>
<string>UTC</string>
</tuple>
</state>
......
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