签名算法.ts

import {parse} from 'query-string'
import sha256 from 'crypto-js/sha256'
import cloneDeep from 'lodash.clonedeep'

const deepSort = (data = {}) =>
  Object.keys(data)
    .sort()
    .reverse()
    .map(key => {
      if (data[key] === null) {
        data[key] = 'null'
      } else if (Array.isArray(data[key])) {
        data[key] = data[key].map(deepSort)
      } else if (data[key] === Object(data[key])) {
        data[key] = deepSort(data[key])
      }

      return {[key]: data[key]}
    })
    .reduce((prev, current) => ({...prev, ...current}), {})

const calcStr = (path = '', data = {}) => {
  let str = ''

  Object.entries(data).forEach(([key, value], index) => {
    if (Array.isArray(value) || value === Object(value)) {
      value = JSON.stringify(value).replace(/"/g, '')
    }
    str += `${key}=${value}${index % 2 ? '&' : '|'}`
  })

  return `${path}^${str.slice(0, -1)}^`
}

const calcSignature = (path = '', query = '', body: any = {}) => {
  const requestId = Math.random().toString(36).slice(2)
  const timestamp = Math.round(new Date().getTime())

  const headers = {
    'X-RequestId': requestId,
    'X-Timestamp': timestamp.toString(),
  }

  const str = calcStr(
    path,
    deepSort({
      ...headers,
      ...parse(query),
      ...cloneDeep(body),
    })
  )

  return {
    ...headers,
    'X-Signature': sha256(str).toString(),
  }
}

export default calcSignature