mirror of https://github.com/jkjoy/sunpeiwen.git
99 lines
3.8 KiB
JavaScript
99 lines
3.8 KiB
JavaScript
/*
|
|
Copyright 2018 Google LLC
|
|
|
|
Use of this source code is governed by an MIT-style
|
|
license that can be found in the LICENSE file or at
|
|
https://opensource.org/licenses/MIT.
|
|
*/
|
|
import { assert } from 'workbox-core/_private/assert.js';
|
|
import { logger } from 'workbox-core/_private/logger.js';
|
|
import { timeout } from 'workbox-core/_private/timeout.js';
|
|
import { WorkboxError } from 'workbox-core/_private/WorkboxError.js';
|
|
import { Strategy } from './Strategy.js';
|
|
import { messages } from './utils/messages.js';
|
|
import './_version.js';
|
|
/**
|
|
* An implementation of a
|
|
* [network-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#network-only)
|
|
* request strategy.
|
|
*
|
|
* This class is useful if you want to take advantage of any
|
|
* [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).
|
|
*
|
|
* If the network request fails, this will throw a `WorkboxError` exception.
|
|
*
|
|
* @extends workbox-strategies.Strategy
|
|
* @memberof workbox-strategies
|
|
*/
|
|
class NetworkOnly extends Strategy {
|
|
/**
|
|
* @param {Object} [options]
|
|
* @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
|
|
* to use in conjunction with this caching strategy.
|
|
* @param {Object} [options.fetchOptions] Values passed along to the
|
|
* [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
|
|
* of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)
|
|
* `fetch()` requests made by this strategy.
|
|
* @param {number} [options.networkTimeoutSeconds] If set, any network requests
|
|
* that fail to respond within the timeout will result in a network error.
|
|
*/
|
|
constructor(options = {}) {
|
|
super(options);
|
|
this._networkTimeoutSeconds = options.networkTimeoutSeconds || 0;
|
|
}
|
|
/**
|
|
* @private
|
|
* @param {Request|string} request A request to run this strategy for.
|
|
* @param {workbox-strategies.StrategyHandler} handler The event that
|
|
* triggered the request.
|
|
* @return {Promise<Response>}
|
|
*/
|
|
async _handle(request, handler) {
|
|
if (process.env.NODE_ENV !== 'production') {
|
|
assert.isInstance(request, Request, {
|
|
moduleName: 'workbox-strategies',
|
|
className: this.constructor.name,
|
|
funcName: '_handle',
|
|
paramName: 'request',
|
|
});
|
|
}
|
|
let error = undefined;
|
|
let response;
|
|
try {
|
|
const promises = [
|
|
handler.fetch(request),
|
|
];
|
|
if (this._networkTimeoutSeconds) {
|
|
const timeoutPromise = timeout(this._networkTimeoutSeconds * 1000);
|
|
promises.push(timeoutPromise);
|
|
}
|
|
response = await Promise.race(promises);
|
|
if (!response) {
|
|
throw new Error(`Timed out the network response after ` +
|
|
`${this._networkTimeoutSeconds} seconds.`);
|
|
}
|
|
}
|
|
catch (err) {
|
|
if (err instanceof Error) {
|
|
error = err;
|
|
}
|
|
}
|
|
if (process.env.NODE_ENV !== 'production') {
|
|
logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
|
|
if (response) {
|
|
logger.log(`Got response from network.`);
|
|
}
|
|
else {
|
|
logger.log(`Unable to get a response from the network.`);
|
|
}
|
|
messages.printFinalResponse(response);
|
|
logger.groupEnd();
|
|
}
|
|
if (!response) {
|
|
throw new WorkboxError('no-response', { url: request.url, error });
|
|
}
|
|
return response;
|
|
}
|
|
}
|
|
export { NetworkOnly };
|