小程序: downloadFile + openDocument 下载文件

2个小程序的API，完成下载功能

先看代码

export const promisifyAPIs = (apiNames) => {
  const promisifiedAPIs = {};

  apiNames.forEach((apiName) => {
    if (!wx[apiName]) {
      throw new Error(`wx.${apiName} is not a valid function.`);
    }

    promisifiedAPIs[apiName] = function (options = {}) {
      return new Promise((resolve, reject) => {
        wx[apiName]({
          ...options,
          success: (res) => resolve(res),
          fail: (err) => reject(err)
        });
      });
    };
  });

  return promisifiedAPIs;
};

const { downloadFile, openDocument } = promisifyAPIs([
  'downloadFile',
  'openDocument'
]);

核心下载逻辑

const fileUrl = "https://web-assets.alo7.com/assets/pdfs/dummy.pdf";
wx.showLoading({ title: "正在下载文档", mask: true });

try {
  const downloadRes = await downloadFile({ url: fileUrl });
  const filePath = downloadRes.tempFilePath;
  await openDocument({ filePath, showMenu: true });
  wx.showToast({
    title: "打开文档成功",
    icon: "success",
    duration: 2000,
  });
} catch (e) {
  wx.showToast({
    title: "打开文档失败",
    icon: "none",
    duration: 2000,
  });
} finally {
  wx.hideLoading();
}

配置

下载的域名，到 downloadFile 的域名里

先看代码

配置

参考