2 * Copyright (C) 2018 Nick Downing <nick@ndcode.org>
3 * SPDX-License-Identifier: MIT
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 let BuildCache = require('@ndcode/build_cache')
25 let stream_buffers = require('stream-buffers')
26 let util = require('util')
27 let yauzl = require('yauzl')
29 let yauzl_open = util.promisify(yauzl.open)
31 let ZipCache = function(diag1, diag) {
32 if (!this instanceof ZipCache)
33 throw new Error('ZipCache is a constructor')
34 BuildCache.call(this, diag)
38 ZipCache.prototype = Object.create(BuildCache.prototype)
40 ZipCache.prototype.build = async function(key, result) {
41 let zipfile = await yauzl_open(key, {autoClose: false})
43 console.log(`loading zip file ${key}`)
47 (resolve, reject) => {
49 on('entry', entry => {entries.push(entry)}).
50 on('end', () => resolve())
55 for (let i = 0; i < entries.length; ++i) {
56 let read_stream = await new Promise(
57 (resolve, reject) => {
58 zipfile.openReadStream(
69 let write_stream = new stream_buffers.WritableStreamBuffer()
70 let data = new Promise(
71 (resolve, reject) => {
73 on('finish', () => {resolve(write_stream.getContents())}).
74 on('error', err => {reject(err)})
77 read_stream.pipe(write_stream)
80 let entry_pathname = '/' + entries[i].fileName
82 console.log(`entry pathname ${entry_pathname} size ${data.length}`)
83 result.value[entry_pathname] = data
88 module.exports = ZipCache