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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.
*
*/
(function() {
var nativeAddAll = Cache.prototype.addAll;
var userAgent = navigator.userAgent.match(/(Firefox|Chrome)\/(\d+\.)/);
// Has nice behavior of `var` which everyone hates
if (userAgent) {
var agent = userAgent[1];
var version = parseInt(userAgent[2]);
}
if (nativeAddAll && (!userAgent || (agent === 'Firefox' && version >= 46) || (agent === 'Chrome' && version >= 50))) {
return;
}
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) {
// If some of the responses has not OK-eish status,
// then whole operation should reject
if (
responses.some(function(response) {
return !response.ok;
})
) {
throw new NetworkError('Incorrect response status');
}
// 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;
});
};
Cache.prototype.add = function add(request) {
return this.addAll([request]);
};
})();
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