阿里云OSS-js分片上传

使用 aliyun-oss-sdk-4.4.4.min.js

方式一 客户端授权

https://help.aliyun.com/document_detail/32069.html

通过new OSS.Wapper()来创建client，OSS.Wrapper提供了异步的接口，类似于callback的方式，在.then()中处理返回的结果，在.catch()中处理错误。

注意这里暴露了accessKeySecret，实际应用中在客户端不可采用这种方式。

<body>
<script src="http://gosspublic.alicdn.com/aliyun-oss-sdk-4.4.4.min.js"></script>
  <input type="file" id="file" />
  <script type="text/javascript">
    var client = new OSS.Wrapper({
      region: '<oss region>',
      accessKeyId: '<Your accessKeyId>',
      accessKeySecret: '<Your accessKeySecret>',
      bucket: '<Your bucket name>'
    });
    document.getElementById('file').addEventListener('change', function (e) {
      var file = e.target.files[0];
      var storeAs = 'upload-file';
      console.log(file.name + ' => ' + storeAs);
      client.multipartUpload(storeAs, file).then(function (result) {
        console.log(result);
      }).catch(function (err) {
        console.log(err);
      });
    });
  </script>
</body>

方式二 采用服务端授权

https://github.com/rockuw/oss-in-browser

<script>
var appServer = 'http://localhost:3000';//STS授权服务端
var bucket = 'js-sdk-bucket-sts';
var region = 'oss-cn-hangzhou';
var urllib = OSS.urllib;
var OSS = OSS.Wrapper;
var STS = OSS.STS;
var applyTokenDo = function (func) {
  var url = appServer;
  return urllib.request(url, {
    method: 'GET'
  }).then(function (result) {
    var creds = JSON.parse(result.data);
    var client = new OSS({
      region: region,
      accessKeyId: creds.AccessKeyId,
      accessKeySecret: creds.AccessKeySecret,
      stsToken: creds.SecurityToken,
      bucket: bucket
    });
    return func(client);
  });
};
var progress = function (p) {
  return function (done) {
    var bar = document.getElementById('progress-bar');
    bar.style.width = Math.floor(p * 100) + '%';
    bar.innerHTML = Math.floor(p * 100) + '%';
    done();
  }
};
var uploadFile = function (client) {
  var file = document.getElementById('file').files[0];
  var key = document.getElementById('object-key-file').value.trim() || 'object';
  console.log(file.name + ' => ' + key);
  return client.multipartUpload(key, file, {
    progress: progress
  }).then(function (res) {
    console.log('upload success: %j', res);
    return listFiles(client);
  });
};
window.onload = function () {
  document.getElementById('file-button').onclick = function () {
    applyTokenDo(uploadFile);
  }
};
</script>