@ylz/plugins/packages/file-download/index.js

ylz plugins

/**
 * 根据后台接口文件流下载
 * @param {*} data
 * @param {*} filename
 * @param {*} mime
 * @param {*} bom
 */
const downloadByData = (data, filename, mime, bom) => {
  let blobData = typeof bom !== 'undefined' ? [bom, data] : [data]
  let blob = new Blob(blobData, { type: mime || 'application/octet-stream' })
  if (typeof window.navigator.msSaveBlob !== 'undefined') {
    window.navigator.msSaveBlob(blob, filename)
  } else {
    let blobURL = window.URL.createObjectURL(blob)
    let tempLink = document.createElement('a')
    tempLink.style.display = 'none'
    tempLink.href = blobURL
    tempLink.setAttribute('download', filename)
    if (typeof tempLink.download === 'undefined') {
      tempLink.setAttribute('target', '_blank')
    }
    document.body.appendChild(tempLink)
    tempLink.click()
    document.body.removeChild(tempLink)
    window.URL.revokeObjectURL(blobURL)
  }
}
/**
 * 根据文件地址下载文件
 * @param {*} sUrl
 */
const downloadByUrl = (sUrl, target = '_self') => {
  const isChrome = window.navigator.userAgent.toLowerCase().indexOf('chrome') > -1
  const isSafari = window.navigator.userAgent.toLowerCase().indexOf('safari') > -1

  if (/(iP)/g.test(window.navigator.userAgent)) {
    console.error('您的浏览器不支持下载!')
    return false
  }
  if (isChrome || isSafari) {
    let link = document.createElement('a')
    link.href = sUrl
    link.target = target

    if (link.download !== undefined) {
      let fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length)
      link.download = fileName
    }

    if (document.createEvent) {
      let e = document.createEvent('MouseEvents')
      e.initEvent('click', true, true)
      link.dispatchEvent(e)
      return true
    }
  }
  if (sUrl.indexOf('?') === -1) {
    sUrl += '?download'
  }

  window.open(sUrl, target)
  return true
}

export default { downloadByData, downloadByUrl }