static: support offline page service worker

This commit is contained in:
Cadey Ratio 2018-10-20 13:17:13 -07:00
parent cb2d716b38
commit df2301f496
3 changed files with 82 additions and 8 deletions

55
static/js/pwabuilder-sw.js Executable file
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@ -0,0 +1,55 @@
//This is the service worker with the combined offline experience (Offline page + Offline copy of pages)
//Install stage sets up the offline page in the cache and opens a new cache
self.addEventListener('install', function(event) {
event.waitUntil(preLoad());
});
var preLoad = function(){
console.log('[PWA Builder] Install Event processing');
return caches.open('pwabuilder-offline').then(function(cache) {
console.log('[PWA Builder] Cached index and offline page during Install');
return cache.addAll(['/offline.html', '/index.html']);
});
}
self.addEventListener('fetch', function(event) {
console.log('[PWA Builder] The service worker is serving the asset.');
event.respondWith(checkResponse(event.request).catch(function() {
return returnFromCache(event.request)}
));
event.waitUntil(addToCache(event.request));
});
var checkResponse = function(request){
return new Promise(function(fulfill, reject) {
fetch(request).then(function(response){
if(response.status !== 404) {
fulfill(response)
} else {
reject()
}
}, reject)
});
};
var addToCache = function(request){
return caches.open('pwabuilder-offline').then(function (cache) {
return fetch(request).then(function (response) {
console.log('[PWA Builder] add page to offline'+response.url)
return cache.put(request, response);
});
});
};
var returnFromCache = function(request){
return caches.open('pwabuilder-offline').then(function (cache) {
return cache.match(request).then(function (matching) {
if(!matching || matching.status == 404) {
return cache.match('offline.html')
} else {
return matching
}
});
});
};

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@ -1,9 +1,17 @@
{
"name": "Christine Dodrill",
"short_name": "Christine",
"theme_color": "#ffcbe4",
"background_color": "#fa99ca",
"display": "standalone",
"scope": "/",
"start_url": "/"
"name": "Christine Dodrill",
"short_name": "Christine",
"theme_color": "#ffcbe4",
"background_color": "#fa99ca",
"display": "standalone",
"scope": "/",
"start_url": "https://christine.website/",
"description": "Blog and Resume for Christine Dodrill",
"orientation": "any",
"icons": [
{
"src": "https://christine.website/static/img/avatar.png",
"sizes": "1024x1024"
}
]
}

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@ -62,6 +62,17 @@
<footer>
<blockquote>Copyright 2018 Christine Dodrill. Any and all opinions listed here are my own and not representative of my employer.</blockquote>
</footer>
<script>
if (navigator.serviceWorker.controller) {
console.log("Active service worker found, no need to register");
} else {
navigator.serviceWorker.register("/static/js/pwabuilder-sw.js", {
scope: "https://christine.website/"
}).then(function(reg) {
console.log("Service worker has been registered for scope:" + reg.scope);
});
}
</script>
</div>
</body>
</html>