80 lines
2.1 KiB
JavaScript
80 lines
2.1 KiB
JavaScript
import { md5 } from 'js-md5'
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import crc from 'crc'
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// 周数组转换
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export function convertWeekdaysToNumber(weekDay) {
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let weekStr = '00000000'
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// eslint-disable-next-line no-restricted-syntax
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for (const day of weekDay) {
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const index = day % 7
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weekStr = weekStr.substring(0, index) + '1' + weekStr.substring(index + 1)
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}
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// 倒序 weekStr
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weekStr = weekStr.split('').reverse().join('')
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return parseInt(weekStr, 2)
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}
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// 时间戳转二进制
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export function timestampToArray(timestamp) {
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const array = new Uint8Array(4)
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array[0] = (timestamp & 0xff000000) >> 24
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array[1] = (timestamp & 0xff0000) >> 16
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array[2] = (timestamp & 0xff00) >> 8
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array[3] = timestamp & 0xff
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return array
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}
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// md5加密
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export function md5Encrypt(text, token, key) {
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const length = text.length + 4 + 16
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const md5Array = new Uint8Array(length)
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for (let i = 0; i < text.length; i++) {
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md5Array[i] = text.charCodeAt(i)
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}
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md5Array.set(token, text.length)
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md5Array.set(key, text.length + 4)
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const md5Text = md5(md5Array)
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return new Uint8Array(md5Text.match(/.{1,2}/g).map(byte => parseInt(byte, 16)))
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}
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// 生成包尾 头部数据+内容数据
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export function createPackageEnd(headArray, contentArray) {
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// 拼接头部和内容
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let mergerArray = new Uint8Array(headArray.length + contentArray.length)
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mergerArray.set(headArray)
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mergerArray.set(contentArray, headArray.length)
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// crc加密
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const crcResult = crc.crc16kermit(mergerArray)
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// 拼接crc
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let newArray = new Uint8Array(mergerArray.length + 2)
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newArray.set(mergerArray)
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newArray.set([crcResult / 256, crcResult % 256], mergerArray.length)
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return newArray
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}
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// 二进制转时间戳
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export function arrayToTimestamp(array) {
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const timestamp = (array[0] << 24) | (array[1] << 16) | (array[2] << 8) | array[3]
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return timestamp >>> 0
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}
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// 二进制转字符串
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export function uint8ArrayToString(uint8Array) {
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let str = ''
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for (let i = 0; i < uint8Array.length; i++) {
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if (uint8Array[i] !== 0) {
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str += String.fromCharCode(uint8Array[i])
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}
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}
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return str
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}
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