hexo/node_modules/workbox-streams/build/workbox-streams.dev.js

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2023-10-03 11:14:36 +08:00
this.workbox = this.workbox || {};
this.workbox.streams = (function (exports, assert_js, Deferred_js, logger_js, WorkboxError_js, canConstructReadableStream_js) {
'use strict';
try {
self['workbox:streams:6.5.3'] && _();
} catch (e) {}
/*
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.
*/
/**
* Takes either a Response, a ReadableStream, or a
* [BodyInit](https://fetch.spec.whatwg.org/#bodyinit) and returns the
* ReadableStreamReader object associated with it.
*
* @param {workbox-streams.StreamSource} source
* @return {ReadableStreamReader}
* @private
*/
function _getReaderFromSource(source) {
if (source instanceof Response) {
// See https://github.com/GoogleChrome/workbox/issues/2998
if (source.body) {
return source.body.getReader();
}
throw new WorkboxError_js.WorkboxError('opaque-streams-source', {
type: source.type
});
}
if (source instanceof ReadableStream) {
return source.getReader();
}
return new Response(source).body.getReader();
}
/**
* Takes multiple source Promises, each of which could resolve to a Response, a
* ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit).
*
* Returns an object exposing a ReadableStream with each individual stream's
* data returned in sequence, along with a Promise which signals when the
* stream is finished (useful for passing to a FetchEvent's waitUntil()).
*
* @param {Array<Promise<workbox-streams.StreamSource>>} sourcePromises
* @return {Object<{done: Promise, stream: ReadableStream}>}
*
* @memberof workbox-streams
*/
function concatenate(sourcePromises) {
{
assert_js.assert.isArray(sourcePromises, {
moduleName: 'workbox-streams',
funcName: 'concatenate',
paramName: 'sourcePromises'
});
}
const readerPromises = sourcePromises.map(sourcePromise => {
return Promise.resolve(sourcePromise).then(source => {
return _getReaderFromSource(source);
});
});
const streamDeferred = new Deferred_js.Deferred();
let i = 0;
const logMessages = [];
const stream = new ReadableStream({
pull(controller) {
return readerPromises[i].then(reader => reader.read()).then(result => {
if (result.done) {
{
logMessages.push(['Reached the end of source:', sourcePromises[i]]);
}
i++;
if (i >= readerPromises.length) {
// Log all the messages in the group at once in a single group.
{
logger_js.logger.groupCollapsed(`Concatenating ${readerPromises.length} sources.`);
for (const message of logMessages) {
if (Array.isArray(message)) {
logger_js.logger.log(...message);
} else {
logger_js.logger.log(message);
}
}
logger_js.logger.log('Finished reading all sources.');
logger_js.logger.groupEnd();
}
controller.close();
streamDeferred.resolve();
return;
} // The `pull` method is defined because we're inside it.
return this.pull(controller);
} else {
controller.enqueue(result.value);
}
}).catch(error => {
{
logger_js.logger.error('An error occurred:', error);
}
streamDeferred.reject(error);
throw error;
});
},
cancel() {
{
logger_js.logger.warn('The ReadableStream was cancelled.');
}
streamDeferred.resolve();
}
});
return {
done: streamDeferred.promise,
stream
};
}
/*
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.
*/
/**
* This is a utility method that determines whether the current browser supports
* the features required to create streamed responses. Currently, it checks if
* [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)
* is available.
*
* @private
* @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
* `'text/html'` will be used by default.
* @return {boolean} `true`, if the current browser meets the requirements for
* streaming responses, and `false` otherwise.
*
* @memberof workbox-streams
*/
function createHeaders(headersInit = {}) {
// See https://github.com/GoogleChrome/workbox/issues/1461
const headers = new Headers(headersInit);
if (!headers.has('content-type')) {
headers.set('content-type', 'text/html');
}
return headers;
}
/*
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.
*/
/**
* Takes multiple source Promises, each of which could resolve to a Response, a
* ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit),
* along with a
* [HeadersInit](https://fetch.spec.whatwg.org/#typedefdef-headersinit).
*
* Returns an object exposing a Response whose body consists of each individual
* stream's data returned in sequence, along with a Promise which signals when
* the stream is finished (useful for passing to a FetchEvent's waitUntil()).
*
* @param {Array<Promise<workbox-streams.StreamSource>>} sourcePromises
* @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
* `'text/html'` will be used by default.
* @return {Object<{done: Promise, response: Response}>}
*
* @memberof workbox-streams
*/
function concatenateToResponse(sourcePromises, headersInit) {
const {
done,
stream
} = concatenate(sourcePromises);
const headers = createHeaders(headersInit);
const response = new Response(stream, {
headers
});
return {
done,
response
};
}
/*
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.
*/
/**
* This is a utility method that determines whether the current browser supports
* the features required to create streamed responses. Currently, it checks if
* [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)
* can be created.
*
* @return {boolean} `true`, if the current browser meets the requirements for
* streaming responses, and `false` otherwise.
*
* @memberof workbox-streams
*/
function isSupported() {
return canConstructReadableStream_js.canConstructReadableStream();
}
/*
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.
*/
/**
* A shortcut to create a strategy that could be dropped-in to Workbox's router.
*
* On browsers that do not support constructing new `ReadableStream`s, this
* strategy will automatically wait for all the `sourceFunctions` to complete,
* and create a final response that concatenates their values together.
*
* @param {Array<function({event, request, url, params})>} sourceFunctions
* An array of functions similar to {@link workbox-routing~handlerCallback}
* but that instead return a {@link workbox-streams.StreamSource} (or a
* Promise which resolves to one).
* @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,
* `'text/html'` will be used by default.
* @return {workbox-routing~handlerCallback}
* @memberof workbox-streams
*/
function strategy(sourceFunctions, headersInit) {
return async ({
event,
request,
url,
params
}) => {
const sourcePromises = sourceFunctions.map(fn => {
// Ensure the return value of the function is always a promise.
return Promise.resolve(fn({
event,
request,
url,
params
}));
});
if (isSupported()) {
const {
done,
response
} = concatenateToResponse(sourcePromises, headersInit);
if (event) {
event.waitUntil(done);
}
return response;
}
{
logger_js.logger.log(`The current browser doesn't support creating response ` + `streams. Falling back to non-streaming response instead.`);
} // Fallback to waiting for everything to finish, and concatenating the
// responses.
const blobPartsPromises = sourcePromises.map(async sourcePromise => {
const source = await sourcePromise;
if (source instanceof Response) {
return source.blob();
} else {
// Technically, a `StreamSource` object can include any valid
// `BodyInit` type, including `FormData` and `URLSearchParams`, which
// cannot be passed to the Blob constructor directly, so we have to
// convert them to actual Blobs first.
return new Response(source).blob();
}
});
const blobParts = await Promise.all(blobPartsPromises);
const headers = createHeaders(headersInit); // Constructing a new Response from a Blob source is well-supported.
// So is constructing a new Blob from multiple source Blobs or strings.
return new Response(new Blob(blobParts), {
headers
});
};
}
exports.concatenate = concatenate;
exports.concatenateToResponse = concatenateToResponse;
exports.isSupported = isSupported;
exports.strategy = strategy;
return exports;
}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
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