@fmdevui/fm-dev/lib/packages/core/utils/comm/download.js

Page level components developed based on Element Plus.

'use strict';

var index = require('../base64/index.js');

function downloadByOnlineUrl(url, filename, mime, bom) {
  index.urlToBase64(url).then((base64) => {
    downloadByBase64(base64, filename, mime, bom);
  });
}
function downloadByBase64(buf, filename, mime, bom) {
  const base64Buf = index.dataURLtoBlob(buf);
  downloadByData(base64Buf, filename, mime, bom);
}
function downloadByData(data, filename, mime, bom) {
  const blobData = typeof bom !== "undefined" ? [bom, data] : [data];
  const blob = new Blob(blobData, { type: mime || "application/octet-stream" });
  const blobURL = window.URL.createObjectURL(blob);
  const 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);
}
function downloadByUrl({ url, target = "_blank", fileName }) {
  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("Your browser does not support download!");
    return false;
  }
  if (isChrome || isSafari) {
    const link = document.createElement("a");
    link.href = url;
    link.target = target;
    if (link.download !== void 0) {
      link.download = fileName || url.substring(url.lastIndexOf("/") + 1, url.length);
    }
    if (document.createEvent) {
      const e = document.createEvent("MouseEvents");
      e.initEvent("click", true, true);
      link.dispatchEvent(e);
      return true;
    }
  }
  if (url.indexOf("?") === -1) {
    url += "?download";
  }
  openWindow(url, { target });
  return true;
}
function openWindow(url, opt) {
  const { target = "__blank", noopener = true, noreferrer = true } = opt || {};
  const feature = [];
  noopener && feature.push("noopener=yes");
  noreferrer && feature.push("noreferrer=yes");
  window.open(url, target, feature.join(","));
}
function getFileName(headers) {
  var fileName = headers["content-disposition"].split(";")[1].split("filename=")[1];
  var fileNameUnicode = headers["content-disposition"].split("filename*=")[1];
  if (fileName?.includes("%")) fileName = decodeURIComponent(fileName);
  if (fileNameUnicode) {
    fileName = decodeURIComponent(fileNameUnicode.split("''")[1]);
  }
  return fileName;
}
function downloadStreamFile(res, fileName = void 0) {
  const contentType = res.headers["content-type"];
  fileName = fileName || getFileName(res.headers);
  const blob = res.data instanceof Blob ? res.data : new Blob([res.data], { type: contentType });
  downloadByUrl({ url: window.URL.createObjectURL(blob), fileName });
}

exports.downloadByBase64 = downloadByBase64;
exports.downloadByData = downloadByData;
exports.downloadByOnlineUrl = downloadByOnlineUrl;
exports.downloadByUrl = downloadByUrl;
exports.downloadStreamFile = downloadStreamFile;
exports.getFileName = getFileName;
exports.openWindow = openWindow;