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cribjs-editor
Commit 3e628223 authored by Cédric Le Ninivin's avatar Cédric Le Ninivin
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Remove Service Workers from Crib Editor

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serviceworker-cache-polyfill.js deleted 100644 → 0
View file @ a1f97058
// Via https://github.com/coonsta/cache-polyfill/blob/master/dist/serviceworker-cache-polyfill.js
// Adds in some functionality missing in Chrome 40.
if (!Cache.prototype.add) {
Cache.prototype.add = function add(request) {
return this.addAll([request]);
};
}
if (!Cache.prototype.addAll) {
Cache.prototype.addAll = function addAll(requests) {
var cache = this;
// Since DOMExceptions are not constructable:
function NetworkError(message) {
this.name = 'NetworkError';
this.code = 19;
this.message = message;
}
NetworkError.prototype = Object.create(Error.prototype);
return Promise.resolve().then(function() {
if (arguments.length < 1) throw new TypeError();
// Simulate sequence<(Request or USVString)> binding:
var sequence = [];
requests = requests.map(function(request) {
if (request instanceof Request) {
return request;
}
else {
return String(request); // may throw TypeError
}
});
return Promise.all(
requests.map(function(request) {
if (typeof request === 'string') {
request = new Request(request);
}
var scheme = new URL(request.url).protocol;
if (scheme !== 'http:' && scheme !== 'https:') {
throw new NetworkError("Invalid scheme");
}
return fetch(request.clone());
})
);
}).then(function(responses) {
// TODO: check that requests don't overwrite one another
// (don't think this is possible to polyfill due to opaque responses)
return Promise.all(
responses.map(function(response, i) {
return cache.put(requests[i], response);
})
);
}).then(function() {
return undefined;
});
};
}
if (!CacheStorage.prototype.match) {
// This is probably vulnerable to race conditions (removing caches etc)
CacheStorage.prototype.match = function match(request, opts) {
var caches = this;
return this.keys().then(function(cacheNames) {
var match;
return cacheNames.reduce(function(chain, cacheName) {
return chain.then(function() {
return match || caches.open(cacheName).then(function(cache) {
return cache.match(request, opts);
}).then(function(response) {
match = response;
return match;
});
});
}, Promise.resolve());
});
};
}
sw.js deleted 100644 → 0
View file @ a1f97058
/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// This polyfill provides Cache.add(), Cache.addAll(), and CacheStorage.match(),
// which are not implemented in Chrome 40.
// Should not be needed for Chromium > 47 And Firefox > 39
// See https://developer.mozilla.org/en-US/docs/Web/API/Cache
importScripts('./serviceworker-cache-polyfill.js');
// While overkill for this specific sample in which there is only one cache,
// this is one best practice that can be followed in general to keep track of
// multiple caches used by a given service worker, and keep them all versioned.
// It maps a shorthand identifier for a cache to a specific, versioned cache name.
// Note that since global state is discarded in between service worker restarts, these
// variables will be reinitialized each time the service worker handles an event, and you
// should not attempt to change their values inside an event handler. (Treat them as constants.)
// If at any point you want to force pages that use this service worker to start using a fresh
// cache, then increment the CACHE_VERSION value. It will kick off the service worker update
// flow and the old cache(s) will be purged as part of the activate event handler when the
// updated service worker is activated.
var CACHE_VERSION = 1;
var CURRENT_CACHES = {
'cribjs': 'post-message-cache-v' + CACHE_VERSION
};
var URL_LIST;
self.addEventListener('activate', function(event) {
// Delete all caches that aren't named in CURRENT_CACHES.
// While there is only one cache in this example, the same logic will handle the case where
// there are multiple versioned caches.
var expectedCacheNames = Object.keys(CURRENT_CACHES).map(function(key) {
return CURRENT_CACHES[key];
});
URL_LIST = {};
event.waitUntil(
caches.keys().then(function(cacheNames) {
return Promise.all(
cacheNames.map(function(cacheName) {
if (expectedCacheNames.indexOf(cacheName) == -1) {
// If this cache name isn't present in the array of "expected" cache names, then delete it.
console.log('Deleting out of date cache:', cacheName);
return caches.delete(cacheName);
}
})
);
})
);
});
self.addEventListener('fetch', function(event) {
//console.log('Handling fetch event for', event.request.url);
if (event.request.method === "GET") {
/// XXX Why is URL_LIST undefined in some cases???
if (URL_LIST === undefined)
URL_LIST = {};
if (URL_LIST[event.request.url] === undefined) {
URL_LIST[event.request.url] = {
cached: false,
request_number: 0,
url: event.request.url,
};
}
URL_LIST[event.request.url].request_number = URL_LIST[event.request.url].request_number + 1;
event.respondWith(
caches.open(CURRENT_CACHES['cribjs']).then(function(cache) {
return cache.match(event.request).then(function(response) {
if (response) {
// If there is an entry in the cache for event.request, then response will be defined
// and we can just return it. Note that in this example, only font resources are cached.
//console.log(' Found response in cache:', response.url);
URL_LIST[event.request.url].cached = true;
return response;
} else {
// Otherwise, if there is no entry in the cache for event.request, response will be
// undefined, and we need to fetch() the resource.
//console.log(' No response for %s found in cache. About to fetch from network...', event.request.url);
// We call .clone() on the request since we might use it in a call to cache.put() later on.
// Both fetch() and cache.put() "consume" the request, so we need to make a copy.
// (see https://fetch.spec.whatwg.org/#dom-request-clone)
return fetch(event.request.clone()).then(function(response) {
//console.log(' Response for %s from network is: %O', event.request.url, response.url);
// Return the original response object, which will be used to fulfill the resource request.
//cache.put(event.request, response.clone());
return response;
});
}
}).catch(function(error) {
// This catch() will handle exceptions that arise from the match() or fetch() operations.
// Note that a HTTP error response (e.g. 404) will NOT trigger an exception.
// It will return a normal response object that has the appropriate error code set.
console.error(' Error in fetch handler:', error);
throw error;
});
})
);
} else {
event.respondWith(fetch(event.request));
}
});
self.addEventListener('message', function(event) {
var request;
console.log('Handling message event:', event);
// URL_LIST is a hack it should use a persistent object
if (URL_LIST === undefined)
URL_LIST = {};
caches.open(CURRENT_CACHES['cribjs']).then(function(cache) {
switch (event.data.command) {
// This command returns a list of the URLs corresponding to the Request objects
// that serve as keys for the current cache.
case 'keys':
cache.keys().then(function(requests) {
var urls = requests.map(function(request) {
return request.url;
});
// event.ports[0] corresponds to the MessagePort that was transferred as part of the controlled page's
// call to controller.postMessage(). Therefore, event.ports[0].postMessage() will trigger the onmessage
// handler from the controlled page.
// It's up to you how to structure the messages that you send back; this is just one example.
event.ports[0].postMessage({
error: null,
urls: urls.sort()
});
});
break;
case 'allDocs':
cache.keys().then(function(requests) {
var urls = requests.map(function(request) {
return request.url;
}), i, i_len, url;
for (i = 0, i_len = urls.length; i < i_len; i += 1) {
url = urls[i];
if (URL_LIST[url] === undefined) {
URL_LIST[url] = {
cached: true,
request_number: 0,
url: url,
};
}
}
event.ports[0].postMessage({
error: null,
urls: URL_LIST
});
});
break;
// This command adds a new request/response pair to the cache.
case 'add':
// If event.data.url isn't a valid URL, new Request() will throw a TypeError which will be handled
// by the outer .catch().
// Hardcode {mode: 'no-cors} since the default for new Requests constructed from strings is to require
// CORS, and we don't have any way of knowing whether an arbitrary URL that a user entered supports CORS.
request = new Request(event.data.url, {mode: 'no-cors'}),
response = new Response(event.data.information);
if (URL_LIST[request.url] === undefined) {
URL_LIST[request.url] = {
cached: true,
request_number: 0,
url: request.url,
};
}
cache.put(request, response).then(function() {
event.ports[0].postMessage({
error: null
});
});
break;
// This command removes a request/response pair from the cache (assuming it exists).
case 'delete':
request = new Request(event.data.url, {mode: 'no-cors'});
cache.delete(request).then(function(success) {
event.ports[0].postMessage({
error: success ? null : 'Item was not found in the cache.'
});
});
if (URL_LIST[request.url] !== undefined) {
URL_LIST[request.url].cached = false;
}
break;
default:
// This will be handled by the outer .catch().
throw 'Unknown command: ' + event.data.command;
}
}).catch(function(error) {
// If the promise rejects, handle it by returning a standardized error message to the controlled page.
console.error('Message handling failed:', error);
event.ports[0].postMessage({
error: error.toString()
});
});
});
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