Last change
on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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-
Property mode
set to
100644
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File size:
1.1 KB
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Rev | Line | |
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[6a3a178] | 1 | 'use strict'
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| 2 |
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| 3 | module.exports = parseJson
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| 4 | function parseJson (txt, reviver, context) {
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| 5 | context = context || 20
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| 6 | try {
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| 7 | return JSON.parse(txt, reviver)
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| 8 | } catch (e) {
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| 9 | if (typeof txt !== 'string') {
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| 10 | const isEmptyArray = Array.isArray(txt) && txt.length === 0
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| 11 | const errorMessage = 'Cannot parse ' +
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| 12 | (isEmptyArray ? 'an empty array' : String(txt))
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| 13 | throw new TypeError(errorMessage)
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| 14 | }
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| 15 | const syntaxErr = e.message.match(/^Unexpected token.*position\s+(\d+)/i)
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| 16 | const errIdx = syntaxErr
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| 17 | ? +syntaxErr[1]
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| 18 | : e.message.match(/^Unexpected end of JSON.*/i)
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| 19 | ? txt.length - 1
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| 20 | : null
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| 21 | if (errIdx != null) {
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| 22 | const start = errIdx <= context
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| 23 | ? 0
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| 24 | : errIdx - context
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| 25 | const end = errIdx + context >= txt.length
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| 26 | ? txt.length
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| 27 | : errIdx + context
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| 28 | e.message += ` while parsing near '${
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| 29 | start === 0 ? '' : '...'
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| 30 | }${txt.slice(start, end)}${
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| 31 | end === txt.length ? '' : '...'
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| 32 | }'`
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| 33 | } else {
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| 34 | e.message += ` while parsing '${txt.slice(0, context * 2)}'`
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| 35 | }
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| 36 | throw e
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| 37 | }
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| 38 | }
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