2020-02-19 11:14:28 +00:00
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/* eslint-disable
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no-unused-vars,
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2022-05-16 14:25:49 +00:00
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n/no-deprecated-api,
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2020-02-19 11:14:28 +00:00
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*/
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// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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2020-02-19 11:14:14 +00:00
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/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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2020-02-19 11:14:37 +00:00
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let SafeReader
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const fs = require('fs')
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2022-03-01 15:09:36 +00:00
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const logger = require('@overleaf/logger')
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2017-08-18 10:17:01 +00:00
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2020-02-19 11:14:37 +00:00
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module.exports = SafeReader = {
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// safely read up to size bytes from a file and return result as a
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// string
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2017-08-18 10:17:01 +00:00
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2020-02-19 11:14:37 +00:00
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readFile(file, size, encoding, callback) {
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if (callback == null) {
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2021-10-27 09:49:18 +00:00
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callback = function () {}
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2020-02-19 11:14:37 +00:00
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}
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2020-08-10 16:01:11 +00:00
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return fs.open(file, 'r', function (err, fd) {
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2020-02-19 11:14:37 +00:00
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if (err != null && err.code === 'ENOENT') {
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return callback()
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}
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if (err != null) {
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return callback(err)
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}
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2017-08-18 10:17:01 +00:00
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2020-02-19 11:14:37 +00:00
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// safely return always closing the file
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const callbackWithClose = (err, ...result) =>
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2020-08-10 16:01:11 +00:00
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fs.close(fd, function (err1) {
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2020-02-19 11:14:37 +00:00
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if (err != null) {
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return callback(err)
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}
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if (err1 != null) {
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return callback(err1)
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}
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return callback(null, ...Array.from(result))
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})
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2020-05-07 09:42:05 +00:00
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const buff = Buffer.alloc(size) // fills with zeroes by default
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2021-07-13 11:04:48 +00:00
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return fs.read(
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fd,
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buff,
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0,
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buff.length,
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0,
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function (err, bytesRead, buffer) {
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if (err != null) {
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return callbackWithClose(err)
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}
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const result = buffer.toString(encoding, 0, bytesRead)
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return callbackWithClose(null, result, bytesRead)
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2020-02-19 11:14:37 +00:00
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}
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2021-07-13 11:04:48 +00:00
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)
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2020-02-19 11:14:37 +00:00
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})
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2021-07-13 11:04:48 +00:00
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},
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2020-02-19 11:14:37 +00:00
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}
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