I decided to use upup.js by Tal Ater, website here: https://www.talater.com/upup/getting-started-with-offline-first.html, mainly because I had a project deadline and needed something with a short learning curve.
The main thing about PWAs appears to be that the service worker javascript files need to be accessible from the domain root. Warning - this is all very hackish - I wasn't sure how to get a file to appear as if it was on the actual domain root. I tried setting it up using a controller to serve as the base for the JS and manifest files in order to mimic the root. This is the controller setup: def manifest(): item = db(db.item.id > 0).select().first() return locals() def upup(): return locals() def upup_sw(): return locals() manifest.json { "name": "{{=item.name}}", "short_name": "{{=item.slugname}}", "theme_color": "#2196f3", "background_color": "rgba(243,216,33,0.62)", "display": "standalone", "Scope": "/app2/items/", "start_url": "/app2/items/", "icons": [ { "src": "{{=URL('static', 'images/icons/icon-72x72.png', scheme='https', host=True)}}", "sizes": "72x72", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-96x96.png', scheme='https', host=True)}}", "sizes": "96x96", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-128x128.png', scheme='https', host=True)}}", "sizes": "128x128", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-144x144.png', scheme='https', host=True)}}", "sizes": "144x144", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-152x152.png', scheme='https', host=True)}}", "sizes": "152x152", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-192x192.png', scheme='https', host=True)}}", "sizes": "192x192", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-384x384.png', scheme='https', host=True)}}", "sizes": "384x384", "type": "image/png" }, { "src": "{{=URL('static', 'images/icons/icon-512x512.png', scheme='https', host=True)}}", "sizes": "512x512", "type": "image/png" } ], "splash_pages": null } upup.js # I simply copied the contents //! UpUp //! version : 1.0.0 //! author : Tal Ater @TalAter //! license : MIT //! https://github.com/TalAter/UpUp (function(e){"use strict";var t=navigator.serviceWorker;if(!t)return this. UpUp=null,e;var n={"service-worker-url":"{{=URL('items', 'upup_sw.js', scheme=True, )}}"},r=!1,s="font-weight: bold; color: #00f;";this.UpUp={start :function(e){this.addSettings(e),t.register(n["service-worker-url"],{scope: "./app2/items/"}).then(function(e){r&&console.log("Service worker registration successful with scope: %c"+e.scope,s);(e.installing||t. controller||e.active).postMessage({action:"set-settings",settings:n})}). catch(function(e){r&&console.log("Service worker registration failed: %c"+e, s)})},addSettings:function(t){"string"==typeof(t=t||{})&&(t={content:t}),[ "content","content-url","assets","service-worker-url","cache-version"]. forEach(function(r){t[r]!==e&&(n[r]=t[r])})},debug:function(e){r=!(arguments .length>0)||!!e}}}).call(this); //# sourceMappingURL=upup.js.map upup_sw.js //! UpUp Service Worker //! version : 1.0.0 //! license : MIT //! https://github.com/TalAter/UpUp var _CACHE_NAME_PREFIX="upup-cache",_calculateHash=function(e){var t,n=0,s=( e=e.toString()).length;if(0===s)return n;for(t=0;t<s;t++)n=(n<<5)-n+e. charCodeAt(t),n|=0;return n};self.addEventListener("message",function(e){ "set-settings"===e.data.action&&_parseSettingsAndCache(e.data.settings)}), self.addEventListener("fetch",function(e){e.respondWith(fetch(e.request). catch(function(){return caches.match(e.request).then(function(t){return t||( "navigate"===e.request.mode||"GET"===e.request.method&&e.request.headers.get ("accept").includes("text/html")?caches.match("sw-offline-content"):void 0 )})}))});var _parseSettingsAndCache=function(e){var t=_CACHE_NAME_PREFIX+"-" +(e["cache-version"]?e["cache-version"]+"-":"")+_calculateHash(e.content+e[ "content-url"]+e.assets);return caches.open(t).then(function(t){return e. assets&&t.addAll(e.assets.map(function(e){return new Request(e,{mode: "no-cors"})})),e["content-url"]?fetch(e["content-url"],{mode:"no-cors"}). then(function(e){return t.put("sw-offline-content",e)}):e.content?t.put( "sw-offline-content",_buildResponse(e.content)):t.put("sw-offline-content", _buildResponse("You are offline"))}).then(function(){return caches.keys(). then(function(e){return Promise.all(e.map(function(e){if(e.startsWith( _CACHE_NAME_PREFIX)&&t!==e)return caches.delete(e)}))})})},_buildResponse= function(e){return new Response(e,{headers:{"Content-Type":"text/html"}})}; //# sourceMappingURL=upup_sw.js.map The main issue I'm having so far is getting a 404 error when trying to load the service worker file (upup_sw.js) which I think is a path issue (inside upup.js). Any ideas? -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.