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{"version":3,"file":"workbox-streams.dev.js","sources":["../_version.mjs","../concatenate.mjs","../utils/createHeaders.mjs","../concatenateToResponse.mjs","../isSupported.mjs","../strategy.mjs","../index.mjs"],"sourcesContent":["try{self['workbox:streams:4.3.1']&&_()}catch(e){}// eslint-disable-line","/*\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*/\n\nimport {logger} from 'workbox-core/_private/logger.mjs';\nimport {assert} from 'workbox-core/_private/assert.mjs';\n\nimport './_version.mjs';\n\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.body && source.body.getReader) {\n return source.body.getReader();\n }\n\n if (source.getReader) {\n return source.getReader();\n }\n\n // TODO: This should be possible to do by constructing a ReadableStream, but\n // I can't get it to work. As a hack, construct a new Response, and use the\n // reader associated with its body.\n return new Response(source).body.getReader();\n}\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\n const readerPromises = sourcePromises.map((sourcePromise) => {\n return Promise.resolve(sourcePromise).then((source) => {\n return _getReaderFromSource(source);\n });\n });\n\n let fullyStreamedResolve;\n let fullyStreamedReject;\n const done = new Promise((resolve, reject) => {\n fullyStreamedResolve = resolve;\n fullyStreamedReject = reject;\n });\n\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(['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(\n `Concatenating ${readerPromises.length} sources.`);\n for (const message of logMessages) {\n if (Array.isArray(message)) {\n logger.log(...message);\n } else {\n logger.log(message);\n }\n }\n logger.log('Finished reading all sources.');\n logger.groupEnd();\n }\n\n controller.close();\n fullyStreamedResolve();\n return;\n }\n\n return this.pull(controller);\n } else {\n controller.enqueue(result.value);\n }\n }).catch((error) => {\n if (process.env.NODE_ENV !== 'production') {\n logger.err
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