offline-caching | 易学教程

Offline Firebase

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问题 I am implementing an AngularJS web app with Firebase as a backend; it should work offline, too; multi-user sync issues should be very limited, since the app - by design - will only allow new data entries when offline. I understand Firebase has offline capabilities, in the sense that a client can withstand temporary network connection failures: any write operation will be delayed and cached until network comes up again. I ask if any possibility does exist (or does any plan to implement it) to

What is the use of `self.Clients.claim()`

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问题 To register a service worker, I can call navigator.serviceWorker.register('/worker.js') Every time the page loads it checks for an updated version of worker.js . If an update is found, the new worker won't be used until all the page's tabs are closed and then re-opened. The solution I read was: self.addEventListener('install', function(event) { event.waitUntil(self.skipWaiting()); }); self.addEventListener('activate', function(event) { event.waitUntil(self.clients.claim()); }); I can

Is Service Worker intended to replace or coexist with Appcache?

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Is ServiceWorker intended to replace Appcache , or is the intention that the two will coexist? Phrased another way, is appcache about to become deprecated? Blink's Service Worker team is keen on deprecating AppCache (We will follow our usual intent to deprecate process ). We believe that Service Worker is a much better solution. Also, it should be pretty easy to offer a drop-in replacement for AppCache built on top of SW. We'll start by collecting usage metrics and do some outreach. AppCache and Service Worker should coexist without any issue since offering offline support via AppCache for

HTML5 web app not caching when added to home screen in iOS

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问题 To be clear, the web app IS caching and is working fine offline in Mobile Safari. The problem is when it is added to the home screen on an iPhone 4s and iPad 2, both running iOS 6.0.1. It won't work offline and gives a network error to connect to the internet i.e. "Cannot open MYWEBAPP. MYWEBAPP could not be opened because it is not connected to the internet" I've been debugging this for several hours and can't seem to find a solution. I'm not receiving any errors in the console and I'm

iOS: Did Apple disable HTML5 offline capability for web apps saved to the home screen?

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I've been doing lots of work in getting a few web apps to work offline on iOS using the HTML5 manifest. I've ran across the typical problems everyone else has and fixed them and everything seems to be working fine—except in the case where I save the web app to the desktop on my iPhone 4. If I do this and then enable airplane mode, I get the following alert when trying to access the app via the home screen : "your-app-name could not be opened because its not connected to the internet." Accessing the app via Safari browser works fine while offline. If anyone knows if this is an error on my part,

Does Firebase allow an app to start in offline mode?

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I'm thinking of using firebase to write a mobile app using PhoneGap and the HTML5 Application Cache. Lets suppose each user has a list of TODO items. If the app is started when the phone is offline, will it be able to load data from the previous session and sync when a connection is established? If so I'm wondering how this is implemented because I couldn't find a reference to localStorage in firebase.js. Andrew Lee The short answer is: not yet. Once an app has connected to Firebase, the client will cache data locally and be able to access data where there is an outstanding "on" callback even

How to properly invalidate an HTML5 Cache Manifest for online/offline web apps?

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I'm currently using a Cache Manifest (as described here ). This effectively makes the necessary resources to run the application available when the user is offline. Unfortunately, it works a little too well. After the cache manifest is loaded, Firefox 3.5+ caches all of the resources explicitly referenced in the cache manifest. However, if a file on the server is updated and the user tries force-refreshing the page while online (including the cache-manifest itself), Firefox will absolutely refuse to fetch anything. The application remains completely frozen at the last point it was cached.

Client-side data storing,DOM storage or HTML5 Local Storage?

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问题 Im really confused when thinking about my requirement to store data locally for offline viewing.Now i have two options,DOM storage and HTML5 Local storage. As im a complete newbiew in this particular topic,i need some help of SO Experts and Gurus. Whats the Advantage and Dis-advantage of these two.?can any one compare these one.,so that i can understand deeply or give some reference links? 回答1: DOM Storage or Web Storage is the collective name given to the following types of client storage

HTML5 offline caching

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I've read the following Mozilla Developer article that explains how to implement HTML 5 offline resource caching in web apps. I've tried testing this locally: added the mime type to the list, created the manifest file, changed my doctype to the HTML 5 doctype, specified the manifest attribute and the correct path on the HTML element--but still I don't see the manifest file being consumed by Firefox at all. I've also checked the access logs on Apache and didn't see any requests for the manifest file being made. Has anyone given it a jab and had any success? I just don't know how to further

How To Use universal image loader offline caching?

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Is it possible to catch offline using universal image loader? If possible, how to use it? Using configs? How To Set Download Directory manually? out of memory erroron load huge images : my codes : DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder() .cacheOnDisc(true).cacheInMemory(true) .imageScaleType(ImageScaleType.IN_SAMPLE_INT) .displayer(new FadeInBitmapDisplayer(300)).build(); ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(G.appConfigs.context) .defaultDisplayImageOptions(defaultOptions) .memoryCacheExtraOptions(480, 800) // default = device