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Diffstat (limited to 'node_modules/workbox-streams/concatenate.mjs')
| -rw-r--r-- | node_modules/workbox-streams/concatenate.mjs | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/node_modules/workbox-streams/concatenate.mjs b/node_modules/workbox-streams/concatenate.mjs deleted file mode 100644 index 1985907c..00000000 --- a/node_modules/workbox-streams/concatenate.mjs +++ /dev/null @@ -1,140 +0,0 @@ -/* - Copyright 2018 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. -*/ - -import {logger} from 'workbox-core/_private/logger.mjs'; -import {assert} from 'workbox-core/_private/assert.mjs'; - -import './_version.mjs'; - -/** - * 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.body && source.body.getReader) { - return source.body.getReader(); - } - - if (source.getReader) { - return source.getReader(); - } - - // TODO: This should be possible to do by constructing a ReadableStream, but - // I can't get it to work. As a hack, construct a new Response, and use the - // reader associated with its body. - 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) { - if (process.env.NODE_ENV !== 'production') { - assert.isArray(sourcePromises, { - moduleName: 'workbox-streams', - funcName: 'concatenate', - paramName: 'sourcePromises', - }); - } - - const readerPromises = sourcePromises.map((sourcePromise) => { - return Promise.resolve(sourcePromise).then((source) => { - return _getReaderFromSource(source); - }); - }); - - let fullyStreamedResolve; - let fullyStreamedReject; - const done = new Promise((resolve, reject) => { - fullyStreamedResolve = resolve; - fullyStreamedReject = reject; - }); - - let i = 0; - const logMessages = []; - const stream = new ReadableStream({ - pull(controller) { - return readerPromises[i] - .then((reader) => reader.read()) - .then((result) => { - if (result.done) { - if (process.env.NODE_ENV !== 'production') { - 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. - if (process.env.NODE_ENV !== 'production') { - logger.groupCollapsed( - `Concatenating ${readerPromises.length} sources.`); - for (const message of logMessages) { - if (Array.isArray(message)) { - logger.log(...message); - } else { - logger.log(message); - } - } - logger.log('Finished reading all sources.'); - logger.groupEnd(); - } - - controller.close(); - fullyStreamedResolve(); - return; - } - - return this.pull(controller); - } else { - controller.enqueue(result.value); - } - }).catch((error) => { - if (process.env.NODE_ENV !== 'production') { - logger.error('An error occurred:', error); - } - fullyStreamedReject(error); - throw error; - }); - }, - - cancel() { - if (process.env.NODE_ENV !== 'production') { - logger.warn('The ReadableStream was cancelled.'); - } - - fullyStreamedResolve(); - }, - }); - - return {done, stream}; -} - -export {concatenate}; |
