94 lines
2.4 KiB
JavaScript
94 lines
2.4 KiB
JavaScript
if (!Cache.prototype.add) {
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Cache.prototype.add = function add(request) {
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return this.addAll([request]);
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};
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}
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if (!Cache.prototype.addAll) {
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Cache.prototype.addAll = function addAll(requests) {
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var cache = this;
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// Since DOMExceptions are not constructable:
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function NetworkError(message) {
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this.name = 'NetworkError';
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this.code = 19;
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this.message = message;
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}
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NetworkError.prototype = Object.create(Error.prototype);
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return Promise.resolve()
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.then(function() {
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if (arguments.length < 1) throw new TypeError();
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// Simulate sequence<(Request or USVString)> binding:
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var sequence = [];
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requests = requests.map((request) => {
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if (request instanceof Request) {
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return request;
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} else {
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return String(request); // may throw TypeError
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}
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});
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return Promise.all(
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requests.map((request) => {
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if (typeof request === 'string') {
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request = new Request(request);
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}
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var scheme = new URL(request.url).protocol;
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if (scheme !== 'http:' && scheme !== 'https:') {
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throw new NetworkError('Invalid scheme');
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}
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return fetch(request.clone());
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}),
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);
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})
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.then((responses) => {
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// TODO: check that requests don't overwrite one another
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// (don't think this is possible to polyfill due to opaque responses)
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return Promise.all(
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responses.map((response, i) => {
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return cache.put(requests[i], response);
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}),
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);
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})
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.then(() => {
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return undefined;
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});
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};
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}
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if (!CacheStorage.prototype.match) {
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// This is probably vulnerable to race conditions (removing caches etc)
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CacheStorage.prototype.match = function match(request, opts) {
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var caches = this;
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return this.keys().then((cacheNames) => {
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var match;
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return cacheNames.reduce((chain, cacheName) => {
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return chain.then(() => {
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return (
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match ||
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caches
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.open(cacheName)
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.then((cache) => {
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return cache.match(request, opts);
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})
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.then((response) => {
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match = response;
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return match;
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})
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);
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});
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}, Promise.resolve());
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});
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};
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}
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module.exports = self.caches;
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