如何使用 window.fetch 下载文件?

If I want to download a file, what should I do in the then block below?

function downloadFile(token, fileId) {
  let url = `https://www.googleapis.com/drive/v2/files/${fileId}?alt=media`;
  return fetch(url, {
    method: 'GET',
    headers: {
      'Authorization': token
    }
  }).then(...);
}

注意代码在客户端.

推荐答案

我暂时用download.js解决了这个问题 和 blob.

let download = require('./download.min');

...

function downloadFile(token, fileId) {
  let url = `https://www.googleapis.com/drive/v2/files/${fileId}?alt=media`;
  return fetch(url, {
    method: 'GET',
    headers: {
      'Authorization': token
    }
  }).then(function(resp) {
    return resp.blob();
  }).then(function(blob) {
    download(blob);
  });
}

它适用于小文件，但可能不适用于大文件.我想我应该更多地挖掘 Stream.