61 lines
1.3 KiB
TypeScript
61 lines
1.3 KiB
TypeScript
import * as fs from 'fs'
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import * as crypto from 'crypto'
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export function readFile(url: string): Promise<string> {
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return new Promise(res => {
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fs.readFile(url, (err, data) => {
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if (err)
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res()
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else
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res(data.toString())
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})
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})
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}
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export function readFileSync(url: string): string {
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return fs.readFileSync(url).toString()
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}
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export function fileExists(url: string): Promise<boolean> {
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return new Promise(res => {
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fs.exists(url, _ => {
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res(_)
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})
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})
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}
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export function checksum(url: string, plain = false, alg = 'sha1'): Promise<string> {
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return new Promise(res => {
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const hash = crypto.createHash(alg)
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if (plain) {
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res(hash.update(url).digest('hex'))
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}
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else {
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// For large files
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const stream = fs.createReadStream(url)
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stream.on('data', data => hash.update(data, 'utf8'))
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stream.on('end', _ => { res(hash.digest('hex')) })
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}
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})
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}
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export function getFromObject(data: any, name: string): any {
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name = name.trim()
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// If not matches the valid pattern of a getter, return empty string
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const valid: boolean = /^[A-z]\w*(\.[A-z]\w*|\[\d+\]|\[('|")\w+\2\]|\[[A-z]\w*\])*$/.test(name)
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if (!valid)
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return ''
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name = name.replace(/('|")/g, '')
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name = name.replace(/\[(\w+)\]/g, '.$1')
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try {
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for (const i of name.split('.'))
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data = data[i]
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} catch (e) {
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return ''
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}
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return data
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} |