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17 KiB
{"version":3,"file":"workbox-streams.dev.js","sources":["../_version.js","../concatenate.js","../utils/createHeaders.js","../concatenateToResponse.js","../isSupported.js","../strategy.js"],"sourcesContent":["\"use strict\";\n// @ts-ignore\ntry {\n self['workbox:streams:6.5.2'] && _();\n}\ncatch (e) { }\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { assert } from 'workbox-core/_private/assert.js';\nimport { Deferred } from 'workbox-core/_private/Deferred.js';\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';\nimport './_version.js';\n/**\n * Takes either a Response, a ReadableStream, or a\n * [BodyInit](https://fetch.spec.whatwg.org/#bodyinit) and returns the\n * ReadableStreamReader object associated with it.\n *\n * @param {workbox-streams.StreamSource} source\n * @return {ReadableStreamReader}\n * @private\n */\nfunction _getReaderFromSource(source) {\n if (source instanceof Response) {\n // See https://github.com/GoogleChrome/workbox/issues/2998\n if (source.body) {\n return source.body.getReader();\n }\n throw new WorkboxError('opaque-streams-source', { type: source.type });\n }\n if (source instanceof ReadableStream) {\n return source.getReader();\n }\n return new Response(source).body.getReader();\n}\n/**\n * Takes multiple source Promises, each of which could resolve to a Response, a\n * ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit).\n *\n * Returns an object exposing a ReadableStream with each individual stream's\n * data returned in sequence, along with a Promise which signals when the\n * stream is finished (useful for passing to a FetchEvent's waitUntil()).\n *\n * @param {Array<Promise<workbox-streams.StreamSource>>} sourcePromises\n * @return {Object<{done: Promise, stream: ReadableStream}>}\n *\n * @memberof workbox-streams\n */\nfunction concatenate(sourcePromises) {\n if (process.env.NODE_ENV !== 'production') {\n assert.isArray(sourcePromises, {\n moduleName: 'workbox-streams',\n funcName: 'concatenate',\n paramName: 'sourcePromises',\n });\n }\n const readerPromises = sourcePromises.map((sourcePromise) => {\n return Promise.resolve(sourcePromise).then((source) => {\n return _getReaderFromSource(source);\n });\n });\n const streamDeferred = new Deferred();\n let i = 0;\n const logMessages = [];\n const stream = new ReadableStream({\n pull(controller) {\n return readerPromises[i]\n .then((reader) => reader.read())\n .then((result) => {\n if (result.done) {\n if (process.env.NODE_ENV !== 'production') {\n logMessages.push([\n 'Reached the end of source:',\n sourcePromises[i],\n ]);\n }\n i++;\n if (i >= readerPromises.length) {\n // Log all the messages in the group at once in a single group.\n if (process.env.NODE_ENV !== 'production') {\n logger.groupCollapsed(`Concatenating ${readerPromises.length} sources.`);\n for (const message of logMessages) {\n if (Array.isArray(message)) {\n logger.log(...message);\n }\n else {\n logger.log(message);\n }\n }\n logger.log('Finished reading all sources.');\n logger.groupEnd();\n }\n controller.close();\n streamDeferred.resolve();\n return;\n }\n // The `pull` method is defined because we're inside it.\n return this.pull(controller);\n }\n else {\n controller.enqueue(result.value);\n }\n })\n .catch((error) => {\n if (process.env.NODE_ENV !== 'production') {\n logger.error('An error occurred:', error);\n }\n streamDeferred.reject(error);\n throw error;\n });\n },\n cancel() {\n if (process.env.NODE_ENV !== 'production') {\n logger.warn('The ReadableStream was cancelled.');\n }\n streamDeferred.resolve();\n },\n });\n return { done: streamDeferred.promise, stream };\n}\nexport { concatenate };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport '../_version.js';\n/**\n * This is a utility method that determines whether the current browser supports\n * the features required to create streamed responses. Currently, it checks if\n * [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)\n * is available.\n *\n * @private\n * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,\n * `'text/html'` will be used by default.\n * @return {boolean} `true`, if the current browser meets the requirements for\n * streaming responses, and `false` otherwise.\n *\n * @memberof workbox-streams\n */\nfunction createHeaders(headersInit = {}) {\n // See https://github.com/GoogleChrome/workbox/issues/1461\n const headers = new Headers(headersInit);\n if (!headers.has('content-type')) {\n headers.set('content-type', 'text/html');\n }\n return headers;\n}\nexport { createHeaders };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { createHeaders } from './utils/createHeaders.js';\nimport { concatenate } from './concatenate.js';\nimport './_version.js';\n/**\n * Takes multiple source Promises, each of which could resolve to a Response, a\n * ReadableStream, or a [BodyInit](https://fetch.spec.whatwg.org/#bodyinit),\n * along with a\n * [HeadersInit](https://fetch.spec.whatwg.org/#typedefdef-headersinit).\n *\n * Returns an object exposing a Response whose body consists of each individual\n * stream's data returned in sequence, along with a Promise which signals when\n * the stream is finished (useful for passing to a FetchEvent's waitUntil()).\n *\n * @param {Array<Promise<workbox-streams.StreamSource>>} sourcePromises\n * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,\n * `'text/html'` will be used by default.\n * @return {Object<{done: Promise, response: Response}>}\n *\n * @memberof workbox-streams\n */\nfunction concatenateToResponse(sourcePromises, headersInit) {\n const { done, stream } = concatenate(sourcePromises);\n const headers = createHeaders(headersInit);\n const response = new Response(stream, { headers });\n return { done, response };\n}\nexport { concatenateToResponse };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { canConstructReadableStream } from 'workbox-core/_private/canConstructReadableStream.js';\nimport './_version.js';\n/**\n * This is a utility method that determines whether the current browser supports\n * the features required to create streamed responses. Currently, it checks if\n * [`ReadableStream`](https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/ReadableStream)\n * can be created.\n *\n * @return {boolean} `true`, if the current browser meets the requirements for\n * streaming responses, and `false` otherwise.\n *\n * @memberof workbox-streams\n */\nfunction isSupported() {\n return canConstructReadableStream();\n}\nexport { isSupported };\n","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\nimport { logger } from 'workbox-core/_private/logger.js';\nimport { createHeaders } from './utils/createHeaders.js';\nimport { concatenateToResponse } from './concatenateToResponse.js';\nimport { isSupported } from './isSupported.js';\nimport './_version.js';\n/**\n * A shortcut to create a strategy that could be dropped-in to Workbox's router.\n *\n * On browsers that do not support constructing new `ReadableStream`s, this\n * strategy will automatically wait for all the `sourceFunctions` to complete,\n * and create a final response that concatenates their values together.\n *\n * @param {Array<function({event, request, url, params})>} sourceFunctions\n * An array of functions similar to {@link workbox-routing~handlerCallback}\n * but that instead return a {@link workbox-streams.StreamSource} (or a\n * Promise which resolves to one).\n * @param {HeadersInit} [headersInit] If there's no `Content-Type` specified,\n * `'text/html'` will be used by default.\n * @return {workbox-routing~handlerCallback}\n * @memberof workbox-streams\n */\nfunction strategy(sourceFunctions, headersInit) {\n return async ({ event, request, url, params }) => {\n const sourcePromises = sourceFunctions.map((fn) => {\n // Ensure the return value of the function is always a promise.\n return Promise.resolve(fn({ event, request, url, params }));\n });\n if (isSupported()) {\n const { done, response } = concatenateToResponse(sourcePromises, headersInit);\n if (event) {\n event.waitUntil(done);\n }\n return response;\n }\n if (process.env.NODE_ENV !== 'production') {\n logger.log(`The current browser doesn't support creating response ` +\n `streams. 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