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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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# Service Worker Toolbox
[![Build Status](https://travis-ci.org/GoogleChrome/sw-toolbox.svg?branch=master)](https://travis-ci.org/GoogleChrome/sw-toolbox) [![Dependency Status](https://david-dm.org/googlechrome/sw-toolbox.svg)](https://david-dm.org/googlechrome/sw-toolbox) [![devDependencies Status](https://david-dm.org/googlechrome/sw-toolbox/dev-status.svg)](https://david-dm.org/googlechrome/sw-toolbox?type=dev)
> A collection of tools for [service workers](https://w3c.github.io/ServiceWorker/)
Service Worker Toolbox provides some simple helpers for use in creating your own service workers. Specifically, it provides common caching strategies for dynamic content, such as API calls, third-party resources, and large or infrequently used local resources that you don't want precached.
Service Worker Toolbox provides an [expressive approach](https://googlechrome.github.io/sw-toolbox/usage.html#express-style-routes) to using those strategies for runtime requests. If you're not sure what service workers are or what they are for, start with [the explainer doc](https://github.com/slightlyoff/ServiceWorker/blob/master/explainer.md).
## What if I need precaching as well?
Then you should go check out [`sw-precache`](https://github.com/GoogleChrome/sw-precache) before doing anything else. In addition to precaching static resources, `sw-precache` supports optional [runtime caching](https://github.com/GoogleChrome/sw-precache#runtime-caching) through a simple, declarative configuration that incorporates Service Worker Toolbox under the hood.
## Install
Service Worker Toolbox is available through Bower, npm or direct from GitHub:
`bower install --save sw-toolbox`
`npm install --save sw-toolbox`
`git clone https://github.com/GoogleChrome/sw-toolbox.git`
### Register your service worker
From your registering page, register your service worker in the normal way. For example:
```javascript
navigator.serviceWorker.register('my-service-worker.js');
```
As implemented in Chrome 40 or later, a service worker must exist at the root of the scope that you intend it to control, or higher. So if you want all of the pages under `/myapp/` to be controlled by the worker, the worker script itself must be served from either `/` or `/myapp/`. The default scope is the containing path of the service worker script.
For even lower friction, you can instead include the Service Worker Toolbox companion script in your HTML as shown below. Be aware that this is not customizable. If you need to do anything fancier than register with a default scope, you'll need to use the standard registration.
```html
<script src="/path/to/sw-toolbox/companion.js" data-service-worker="my-service-worker.js"></script>
```
### Add Service Worker Toolbox to your service worker script
In your service worker you just need to use `importScripts` to load Service Worker Toolbox:
```javascript
importScripts('bower_components/sw-toolbox/sw-toolbox.js'); // Update path to match your own setup.
```
### Use the toolbox
To understand how to use the toolbox read the [Usage](https://googlechrome.github.io/sw-toolbox/usage.html#main) and [API](https://googlechrome.github.io/sw-toolbox/api.html#main) documentation.
## Support
If you’ve found an error in this library, please file an issue at https://github.com/GoogleChrome/sw-toolbox/issues.
Patches are encouraged, and may be submitted by forking this project and submitting a [pull request through this GitHub repo](https://github.com/GoogleChrome/sw-toolbox/pulls).
## License
Copyright 2015-2016 Google, Inc.
Licensed under the [Apache License, Version 2.0](LICENSE) (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.

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/*
Copyright 2016 Google Inc. All Rights Reserved.
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.
*/
(function() {
'use strict';
var workerScript = document.currentScript && document.currentScript.dataset.serviceWorker;
if (workerScript && 'serviceWorker' in navigator) {
navigator.serviceWorker.register(workerScript);
}
})();

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declare module 'sw-toolbox' {
type URLPattern = string | RegExp
type PrecacheURL = Request | string
type PrecacheURLs = Promise<PrecacheURL[]> | PrecacheURL[]
interface Request {
}
interface Response {
}
export interface CacheOptions {
name: string
maxEntries: number
maxAgeSeconds: number
}
export interface Options {
debug: boolean
networkTimeoutSeconds: number
cache: CacheOptions
}
export interface Handler {
(request: Request): Promise<Response>
}
export interface Router {
any(urlPattern: URLPattern, handler: Handler, options?: Options): void
default(handler: Handler, options?: Options): void
delete(urlPattern: URLPattern, handler: Handler, options?: Options): void
get(urlPattern: URLPattern, handler: Handler, options?: Options): void
head(urlPattern: URLPattern, handler: Handler, options?: Options): void
post(urlPattern: URLPattern, handler: Handler, options?: Options): void
put(urlPattern: URLPattern, handler: Handler, options?: Options): void
}
export const cacheFirst: Handler
export const cacheOnly: Handler
export const fastest: Handler
export const networkFirst: Handler
export const networkOnly: Handler
export const options: Options
export const router: Router
export function cache(url: string, options: Options): void
export function precache(urls: PrecacheURLs): void
export function uncache(url: string): Promise<void>
}

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var globalOptions = require('./options');
var idbCacheExpiration = require('./idb-cache-expiration');
function debug(message, options) {
options = options || {};
var flag = options.debug || globalOptions.debug;
if (flag) {
console.log('[sw-toolbox] ' + message);
}
}
function openCache(options) {
var cacheName;
if (options && options.cache) {
cacheName = options.cache.name;
}
cacheName = cacheName || globalOptions.cache.name;
return caches.open(cacheName);
}
function fetchAndCache(request, options) {
options = options || {};
var successResponses = options.successResponses ||
globalOptions.successResponses;
return fetch(request.clone()).then(function(response) {
// Only cache GET requests with successful responses.
// Since this is not part of the promise chain, it will be done
// asynchronously and will not block the response from being returned to the
// page.
if (request.method === 'GET' && successResponses.test(response.status)) {
openCache(options).then(function(cache) {
cache.put(request, response).then(function() {
// If any of the options are provided in options.cache then use them.
// Do not fallback to the global options for any that are missing
// unless they are all missing.
var cacheOptions = options.cache || globalOptions.cache;
// Only run the cache expiration logic if at least one of the maximums
// is set, and if we have a name for the cache that the options are
// being applied to.
if ((cacheOptions.maxEntries || cacheOptions.maxAgeSeconds) &&
cacheOptions.name) {
queueCacheExpiration(request, cache, cacheOptions);
}
});
});
}
return response.clone();
});
}
var cleanupQueue;
function queueCacheExpiration(request, cache, cacheOptions) {
var cleanup = cleanupCache.bind(null, request, cache, cacheOptions);
if (cleanupQueue) {
cleanupQueue = cleanupQueue.then(cleanup);
} else {
cleanupQueue = cleanup();
}
}
function cleanupCache(request, cache, cacheOptions) {
var requestUrl = request.url;
var maxAgeSeconds = cacheOptions.maxAgeSeconds;
var maxEntries = cacheOptions.maxEntries;
var cacheName = cacheOptions.name;
var now = Date.now();
debug('Updating LRU order for ' + requestUrl + '. Max entries is ' +
maxEntries + ', max age is ' + maxAgeSeconds);
return idbCacheExpiration.getDb(cacheName).then(function(db) {
return idbCacheExpiration.setTimestampForUrl(db, requestUrl, now);
}).then(function(db) {
return idbCacheExpiration.expireEntries(db, maxEntries, maxAgeSeconds, now);
}).then(function(urlsToDelete) {
debug('Successfully updated IDB.');
var deletionPromises = urlsToDelete.map(function(urlToDelete) {
return cache.delete(urlToDelete);
});
return Promise.all(deletionPromises).then(function() {
debug('Done with cache cleanup.');
});
}).catch(function(error) {
debug(error);
});
}
function renameCache(source, destination, options) {
debug('Renaming cache: [' + source + '] to [' + destination + ']', options);
return caches.delete(destination).then(function() {
return Promise.all([
caches.open(source),
caches.open(destination)
]).then(function(results) {
var sourceCache = results[0];
var destCache = results[1];
return sourceCache.keys().then(function(requests) {
return Promise.all(requests.map(function(request) {
return sourceCache.match(request).then(function(response) {
return destCache.put(request, response);
});
}));
}).then(function() {
return caches.delete(source);
});
});
});
}
function cache(url, options) {
return openCache(options).then(function(cache) {
return cache.add(url);
});
}
function uncache(url, options) {
return openCache(options).then(function(cache) {
return cache.delete(url);
});
}
function precache(items) {
if (!(items instanceof Promise)) {
validatePrecacheInput(items);
}
globalOptions.preCacheItems = globalOptions.preCacheItems.concat(items);
}
function validatePrecacheInput(items) {
var isValid = Array.isArray(items);
if (isValid) {
items.forEach(function(item) {
if (!(typeof item === 'string' || (item instanceof Request))) {
isValid = false;
}
});
}
if (!isValid) {
throw new TypeError('The precache method expects either an array of ' +
'strings and/or Requests or a Promise that resolves to an array of ' +
'strings and/or Requests.');
}
return items;
}
function isResponseFresh(response, maxAgeSeconds, now) {
// If we don't have a response, then it's not fresh.
if (!response) {
return false;
}
// Only bother checking the age of the response if maxAgeSeconds is set.
if (maxAgeSeconds) {
var dateHeader = response.headers.get('date');
// If there's no Date: header, then fall through and return true.
if (dateHeader) {
var parsedDate = new Date(dateHeader);
// If the Date: header was invalid for some reason, parsedDate.getTime()
// will return NaN, and the comparison will always be false. That means
// that an invalid date will be treated as if the response is fresh.
if ((parsedDate.getTime() + (maxAgeSeconds * 1000)) < now) {
// Only return false if all the other conditions are met.
return false;
}
}
}
// Fall back on returning true by default, to match the previous behavior in
// which we never bothered checking to see whether the response was fresh.
return true;
}
module.exports = {
debug: debug,
fetchAndCache: fetchAndCache,
openCache: openCache,
renameCache: renameCache,
cache: cache,
uncache: uncache,
precache: precache,
validatePrecacheInput: validatePrecacheInput,
isResponseFresh: isResponseFresh
};

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/*
Copyright 2015 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var DB_PREFIX = 'sw-toolbox-';
var DB_VERSION = 1;
var STORE_NAME = 'store';
var URL_PROPERTY = 'url';
var TIMESTAMP_PROPERTY = 'timestamp';
var cacheNameToDbPromise = {};
function openDb(cacheName) {
return new Promise(function(resolve, reject) {
var request = indexedDB.open(DB_PREFIX + cacheName, DB_VERSION);
request.onupgradeneeded = function() {
var objectStore = request.result.createObjectStore(STORE_NAME,
{keyPath: URL_PROPERTY});
objectStore.createIndex(TIMESTAMP_PROPERTY, TIMESTAMP_PROPERTY,
{unique: false});
};
request.onsuccess = function() {
resolve(request.result);
};
request.onerror = function() {
reject(request.error);
};
});
}
function getDb(cacheName) {
if (!(cacheName in cacheNameToDbPromise)) {
cacheNameToDbPromise[cacheName] = openDb(cacheName);
}
return cacheNameToDbPromise[cacheName];
}
function setTimestampForUrl(db, url, now) {
return new Promise(function(resolve, reject) {
var transaction = db.transaction(STORE_NAME, 'readwrite');
var objectStore = transaction.objectStore(STORE_NAME);
objectStore.put({url: url, timestamp: now});
transaction.oncomplete = function() {
resolve(db);
};
transaction.onabort = function() {
reject(transaction.error);
};
});
}
function expireOldEntries(db, maxAgeSeconds, now) {
// Bail out early by resolving with an empty array if we're not using
// maxAgeSeconds.
if (!maxAgeSeconds) {
return Promise.resolve([]);
}
return new Promise(function(resolve, reject) {
var maxAgeMillis = maxAgeSeconds * 1000;
var urls = [];
var transaction = db.transaction(STORE_NAME, 'readwrite');
var objectStore = transaction.objectStore(STORE_NAME);
var index = objectStore.index(TIMESTAMP_PROPERTY);
index.openCursor().onsuccess = function(cursorEvent) {
var cursor = cursorEvent.target.result;
if (cursor) {
if (now - maxAgeMillis > cursor.value[TIMESTAMP_PROPERTY]) {
var url = cursor.value[URL_PROPERTY];
urls.push(url);
objectStore.delete(url);
cursor.continue();
}
}
};
transaction.oncomplete = function() {
resolve(urls);
};
transaction.onabort = reject;
});
}
function expireExtraEntries(db, maxEntries) {
// Bail out early by resolving with an empty array if we're not using
// maxEntries.
if (!maxEntries) {
return Promise.resolve([]);
}
return new Promise(function(resolve, reject) {
var urls = [];
var transaction = db.transaction(STORE_NAME, 'readwrite');
var objectStore = transaction.objectStore(STORE_NAME);
var index = objectStore.index(TIMESTAMP_PROPERTY);
var countRequest = index.count();
index.count().onsuccess = function() {
var initialCount = countRequest.result;
if (initialCount > maxEntries) {
index.openCursor().onsuccess = function(cursorEvent) {
var cursor = cursorEvent.target.result;
if (cursor) {
var url = cursor.value[URL_PROPERTY];
urls.push(url);
objectStore.delete(url);
if (initialCount - urls.length > maxEntries) {
cursor.continue();
}
}
};
}
};
transaction.oncomplete = function() {
resolve(urls);
};
transaction.onabort = reject;
});
}
function expireEntries(db, maxEntries, maxAgeSeconds, now) {
return expireOldEntries(db, maxAgeSeconds, now).then(function(oldUrls) {
return expireExtraEntries(db, maxEntries).then(function(extraUrls) {
return oldUrls.concat(extraUrls);
});
});
}
module.exports = {
getDb: getDb,
setTimestampForUrl: setTimestampForUrl,
expireEntries: expireEntries
};

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
// For cache.addAll.
require('serviceworker-cache-polyfill');
var helpers = require('./helpers');
var router = require('./router');
var options = require('./options');
// Event listeners
function fetchListener(event) {
var handler = router.match(event.request);
if (handler) {
event.respondWith(handler(event.request));
} else if (router.default &&
event.request.method === 'GET' &&
// Ensure that chrome-extension:// requests don't trigger the default route.
event.request.url.indexOf('http') === 0) {
event.respondWith(router.default(event.request));
}
}
function activateListener(event) {
helpers.debug('activate event fired');
var inactiveCache = options.cache.name + '$$$inactive$$$';
event.waitUntil(helpers.renameCache(inactiveCache, options.cache.name));
}
function flatten(items) {
return items.reduce(function(a, b) {
return a.concat(b);
}, []);
}
function installListener(event) {
var inactiveCache = options.cache.name + '$$$inactive$$$';
helpers.debug('install event fired');
helpers.debug('creating cache [' + inactiveCache + ']');
event.waitUntil(
helpers.openCache({cache: {name: inactiveCache}})
.then(function(cache) {
return Promise.all(options.preCacheItems)
.then(flatten)
.then(helpers.validatePrecacheInput)
.then(function(preCacheItems) {
helpers.debug('preCache list: ' +
(preCacheItems.join(', ') || '(none)'));
return cache.addAll(preCacheItems);
});
})
);
}
module.exports = {
fetchListener: fetchListener,
activateListener: activateListener,
installListener: installListener
};

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/*
Copyright 2015 Google Inc. All Rights Reserved.
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.
*/
'use strict';
// TODO: This is necessary to handle different implementations in the wild
// The spec defines self.registration, but it was not implemented in Chrome 40.
var scope;
if (self.registration) {
scope = self.registration.scope;
} else {
scope = self.scope || new URL('./', self.location).href;
}
module.exports = {
cache: {
name: '$$$toolbox-cache$$$' + scope + '$$$',
maxAgeSeconds: null,
maxEntries: null
},
debug: false,
networkTimeoutSeconds: null,
preCacheItems: [],
// A regular expression to apply to HTTP response codes. Codes that match
// will be considered successes, while others will not, and will not be
// cached.
successResponses: /^0|([123]\d\d)|(40[14567])|410$/
};

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
// TODO: Use self.registration.scope instead of self.location
var url = new URL('./', self.location);
var basePath = url.pathname;
var pathRegexp = require('path-to-regexp');
var Route = function(method, path, handler, options) {
if (path instanceof RegExp) {
this.fullUrlRegExp = path;
} else {
// The URL() constructor can't parse express-style routes as they are not
// valid urls. This means we have to manually manipulate relative urls into
// absolute ones. This check is extremely naive but implementing a tweaked
// version of the full algorithm seems like overkill
// (https://url.spec.whatwg.org/#concept-basic-url-parser)
if (path.indexOf('/') !== 0) {
path = basePath + path;
}
this.keys = [];
this.regexp = pathRegexp(path, this.keys);
}
this.method = method;
this.options = options;
this.handler = handler;
};
Route.prototype.makeHandler = function(url) {
var values;
if (this.regexp) {
var match = this.regexp.exec(url);
values = {};
this.keys.forEach(function(key, index) {
values[key.name] = match[index + 1];
});
}
return function(request) {
return this.handler(request, values, this.options);
}.bind(this);
};
module.exports = Route;

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var Route = require('./route');
var helpers = require('./helpers');
function regexEscape(s) {
return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
}
var keyMatch = function(map, string) {
// This would be better written as a for..of loop, but that would break the
// minifyify process in the build.
var entriesIterator = map.entries();
var item = entriesIterator.next();
var matches = [];
while (!item.done) {
var pattern = new RegExp(item.value[0]);
if (pattern.test(string)) {
matches.push(item.value[1]);
}
item = entriesIterator.next();
}
return matches;
};
var Router = function() {
this.routes = new Map();
// Create the dummy origin for RegExp-based routes
this.routes.set(RegExp, new Map());
this.default = null;
};
['get', 'post', 'put', 'delete', 'head', 'any'].forEach(function(method) {
Router.prototype[method] = function(path, handler, options) {
return this.add(method, path, handler, options);
};
});
Router.prototype.add = function(method, path, handler, options) {
options = options || {};
var origin;
if (path instanceof RegExp) {
// We need a unique key to use in the Map to distinguish RegExp paths
// from Express-style paths + origins. Since we can use any object as the
// key in a Map, let's use the RegExp constructor!
origin = RegExp;
} else {
origin = options.origin || self.location.origin;
if (origin instanceof RegExp) {
origin = origin.source;
} else {
origin = regexEscape(origin);
}
}
method = method.toLowerCase();
var route = new Route(method, path, handler, options);
if (!this.routes.has(origin)) {
this.routes.set(origin, new Map());
}
var methodMap = this.routes.get(origin);
if (!methodMap.has(method)) {
methodMap.set(method, new Map());
}
var routeMap = methodMap.get(method);
var regExp = route.regexp || route.fullUrlRegExp;
if (routeMap.has(regExp.source)) {
helpers.debug('"' + path + '" resolves to same regex as existing route.');
}
routeMap.set(regExp.source, route);
};
Router.prototype.matchMethod = function(method, url) {
var urlObject = new URL(url);
var origin = urlObject.origin;
var path = urlObject.pathname;
// We want to first check to see if there's a match against any
// "Express-style" routes (string for the path, RegExp for the origin).
// Checking for Express-style matches first maintains the legacy behavior.
// If there's no match, we next check for a match against any RegExp routes,
// where the RegExp in question matches the full URL (both origin and path).
return this._match(method, keyMatch(this.routes, origin), path) ||
this._match(method, [this.routes.get(RegExp)], url);
};
Router.prototype._match = function(method, methodMaps, pathOrUrl) {
if (methodMaps.length === 0) {
return null;
}
for (var i = 0; i < methodMaps.length; i++) {
var methodMap = methodMaps[i];
var routeMap = methodMap && methodMap.get(method.toLowerCase());
if (routeMap) {
var routes = keyMatch(routeMap, pathOrUrl);
if (routes.length > 0) {
return routes[0].makeHandler(pathOrUrl);
}
}
}
return null;
};
Router.prototype.match = function(request) {
return this.matchMethod(request.method, request.url) ||
this.matchMethod('any', request.url);
};
module.exports = new Router();

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var globalOptions = require('../options');
var helpers = require('../helpers');
function cacheFirst(request, values, options) {
options = options || {};
helpers.debug('Strategy: cache first [' + request.url + ']', options);
return helpers.openCache(options).then(function(cache) {
return cache.match(request).then(function(response) {
var cacheOptions = options.cache || globalOptions.cache;
var now = Date.now();
if (helpers.isResponseFresh(response, cacheOptions.maxAgeSeconds, now)) {
return response;
}
return helpers.fetchAndCache(request, options);
});
});
}
module.exports = cacheFirst;

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var globalOptions = require('../options');
var helpers = require('../helpers');
function cacheOnly(request, values, options) {
options = options || {};
helpers.debug('Strategy: cache only [' + request.url + ']', options);
return helpers.openCache(options).then(function(cache) {
return cache.match(request).then(function(response) {
var cacheOptions = options.cache || globalOptions.cache;
var now = Date.now();
if (helpers.isResponseFresh(response, cacheOptions.maxAgeSeconds, now)) {
return response;
}
return undefined;
});
});
}
module.exports = cacheOnly;

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build/node_modules/sw-toolbox/lib/strategies/fastest.js generated vendored Normal file
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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var helpers = require('../helpers');
var cacheOnly = require('./cacheOnly');
function fastest(request, values, options) {
helpers.debug('Strategy: fastest [' + request.url + ']', options);
return new Promise(function(resolve, reject) {
var rejected = false;
var reasons = [];
var maybeReject = function(reason) {
reasons.push(reason.toString());
if (rejected) {
reject(new Error('Both cache and network failed: "' +
reasons.join('", "') + '"'));
} else {
rejected = true;
}
};
var maybeResolve = function(result) {
if (result instanceof Response) {
resolve(result);
} else {
maybeReject('No result returned');
}
};
helpers.fetchAndCache(request.clone(), options)
.then(maybeResolve, maybeReject);
cacheOnly(request, values, options)
.then(maybeResolve, maybeReject);
});
}
module.exports = fastest;

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
module.exports = {
networkOnly: require('./networkOnly'),
networkFirst: require('./networkFirst'),
cacheOnly: require('./cacheOnly'),
cacheFirst: require('./cacheFirst'),
fastest: require('./fastest')
};

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/*
Copyright 2015 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var globalOptions = require('../options');
var helpers = require('../helpers');
function networkFirst(request, values, options) {
options = options || {};
var successResponses = options.successResponses ||
globalOptions.successResponses;
// This will bypass options.networkTimeout if it's set to a false-y value like
// 0, but that's the sane thing to do anyway.
var networkTimeoutSeconds = options.networkTimeoutSeconds ||
globalOptions.networkTimeoutSeconds;
helpers.debug('Strategy: network first [' + request.url + ']', options);
return helpers.openCache(options).then(function(cache) {
var timeoutId;
var promises = [];
var originalResponse;
if (networkTimeoutSeconds) {
var cacheWhenTimedOutPromise = new Promise(function(resolve) {
timeoutId = setTimeout(function() {
cache.match(request).then(function(response) {
var cacheOptions = options.cache || globalOptions.cache;
// Only resolve this promise if there's a valid response in the
// cache. This ensures that we won't time out a network request
// unless there's a cached entry to fallback on, which is arguably
// the preferable behavior.
var now = Date.now();
var maxAgeSeconds = cacheOptions.maxAgeSeconds;
if (helpers.isResponseFresh(response, maxAgeSeconds, now)) {
resolve(response);
}
});
}, networkTimeoutSeconds * 1000);
});
promises.push(cacheWhenTimedOutPromise);
}
var networkPromise = helpers.fetchAndCache(request, options)
.then(function(response) {
// We've got a response, so clear the network timeout if there is one.
if (timeoutId) {
clearTimeout(timeoutId);
}
if (successResponses.test(response.status)) {
return response;
}
helpers.debug('Response was an HTTP error: ' + response.statusText,
options);
originalResponse = response;
throw new Error('Bad response');
}).catch(function(error) {
helpers.debug('Network or response error, fallback to cache [' +
request.url + ']', options);
return cache.match(request).then(function(response) {
// If there's a match in the cache, resolve with that.
if (response) {
return response;
}
// If we have a Response object from the previous fetch, then resolve
// with that, even though it corresponds to an error status code.
if (originalResponse) {
return originalResponse;
}
// If we don't have a Response object from the previous fetch, likely
// due to a network failure, then reject with the failure error.
throw error;
});
});
promises.push(networkPromise);
return Promise.race(promises);
});
}
module.exports = networkFirst;

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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
var helpers = require('../helpers');
function networkOnly(request, values, options) {
helpers.debug('Strategy: network only [' + request.url + ']', options);
return fetch(request);
}
module.exports = networkOnly;

46
build/node_modules/sw-toolbox/lib/sw-toolbox.js generated vendored Normal file
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/*
Copyright 2014 Google Inc. All Rights Reserved.
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.
*/
'use strict';
// This is the entrypoint for the sw-toolbox bundle. All code with
// side effects (e.g. adding event listeners) should be in this file.
var options = require('./options');
var router = require('./router');
var helpers = require('./helpers');
var strategies = require('./strategies');
var listeners = require('./listeners');
helpers.debug('Service Worker Toolbox is loading');
// Set up listeners.
self.addEventListener('install', listeners.installListener);
self.addEventListener('activate', listeners.activateListener);
self.addEventListener('fetch', listeners.fetchListener);
module.exports = {
networkOnly: strategies.networkOnly,
networkFirst: strategies.networkFirst,
cacheOnly: strategies.cacheOnly,
cacheFirst: strategies.cacheFirst,
fastest: strategies.fastest,
router: router,
options: options,
cache: helpers.cache,
uncache: helpers.uncache,
precache: helpers.precache
};

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{
"_from": "sw-toolbox@^3.4.0",
"_id": "sw-toolbox@3.6.0",
"_inBundle": false,
"_integrity": "sha1-Jt8dHHA0hljk3qKIQxkUm3sxg7U=",
"_location": "/sw-toolbox",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "sw-toolbox@^3.4.0",
"name": "sw-toolbox",
"escapedName": "sw-toolbox",
"rawSpec": "^3.4.0",
"saveSpec": null,
"fetchSpec": "^3.4.0"
},
"_requiredBy": [
"/sw-precache"
],
"_resolved": "https://registry.npmjs.org/sw-toolbox/-/sw-toolbox-3.6.0.tgz",
"_shasum": "26df1d1c70348658e4dea2884319149b7b3183b5",
"_spec": "sw-toolbox@^3.4.0",
"_where": "/Users/asciidisco/Desktop/asciidisco.com/build/node_modules/sw-precache",
"bugs": {
"url": "https://github.com/GoogleChrome/sw-toolbox/issues"
},
"bundleDependencies": false,
"dependencies": {
"path-to-regexp": "^1.0.1",
"serviceworker-cache-polyfill": "^4.0.0"
},
"deprecated": false,
"description": "Service Worker Toolbox provides some simple helpers for use in creating your own service workers.",
"devDependencies": {
"browserify": "^13.1.0",
"chai": "^3.4.1",
"chromedriver": "^2.27.2",
"cookie-parser": "^1.4.1",
"eslint": "^3.13.1",
"eslint-config-google": "^0.7.1",
"express": "^4.13.3",
"geckodriver": "^1.3.0",
"gulp": "^3.9.0",
"gulp-eslint": "^3.0.1",
"gulp-gh-pages": "^0.5.4",
"gulp-header": "^1.8.8",
"gulp-sourcemaps": "^2.3.1",
"gulp-uglify": "^2.0.0",
"jsdoc": "^3.4.0",
"mocha": "^3.2.0",
"npm-publish-scripts": "^4.1.0",
"operadriver": "^1.0.0",
"selenium-assistant": "^5.0.2",
"sw-testing-helpers": "1.0.1",
"temp": "^0.8.3",
"vinyl-buffer": "^1.0.0",
"vinyl-source-stream": "^1.1.0",
"which": "^1.2.4"
},
"files": [
"lib/",
"companion.js",
"sw-toolbox.js",
"sw-toolbox.js.map",
"index.d.ts"
],
"homepage": "https://github.com/GoogleChrome/sw-toolbox#readme",
"license": "Apache-2.0",
"main": "lib/sw-toolbox.js",
"name": "sw-toolbox",
"repository": {
"type": "git",
"url": "git+https://github.com/GoogleChrome/sw-toolbox.git"
},
"scripts": {
"build": "gulp default",
"publish-release": "npm-publish-scripts publish-release",
"test": "gulp lint default && node ./test/helpers/download-browsers.js && mocha"
},
"version": "3.6.0"
}

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