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project-client-server-apps
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server/node_modules/decompress-response/index.js
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1lostsun
update project
25 май 2025, 13:12
25 май 2025, 13:12
78a0079
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'use strict'; const {Transform, PassThrough} = require('stream'); const zlib = require('zlib'); const mimicResponse = require('mimic-response'); module.exports = response => { const contentEncoding = (response.headers['content-encoding'] || '').toLowerCase(); if (!['gzip', 'deflate', 'br'].includes(contentEncoding)) { return response; } // TODO: Remove this when targeting Node.js 12. const isBrotli = contentEncoding === 'br'; if (isBrotli && typeof zlib.createBrotliDecompress !== 'function') { response.destroy(new Error('Brotli is not supported on Node.js < 12')); return response; } let isEmpty = true; const checker = new Transform({ transform(data, _encoding, callback) { isEmpty = false; callback(null, data); }, flush(callback) { callback(); } }); const finalStream = new PassThrough({ autoDestroy: false, destroy(error, callback) { response.destroy(); callback(error); } }); const decompressStream = isBrotli ? zlib.createBrotliDecompress() : zlib.createUnzip(); decompressStream.once('error', error => { if (isEmpty && !response.readable) { finalStream.end(); return; } finalStream.destroy(error); }); mimicResponse(response, finalStream); response.pipe(checker).pipe(decompressStream).pipe(finalStream); return finalStream; };