aliyun-oss-upload/aliyun-oss-upload.js

用于阿里云OSS采用服务端签名后WEB直传

/**
 * Created by aweiu on 16/11/4.
 */

'use strict';

var uuid = require('uuid');

var Cache = require('cache-promise');

var promiseCache = {};
function getRandomName(fileName) {
  var pos = fileName.lastIndexOf('.');
  var suffix = pos === -1 ? '' : fileName.substring(pos);
  return uuid.v4().replace(/-/g, '') + suffix;
}
function Upload(options) {
  this.options = options;
  this.signature = new Cache(options.signatureGetter, options.expiration);
}
Upload.prototype.post = function (file, cacheKey) {
  var _this = this;

  var cache = promiseCache[cacheKey];
  if (cache) return cache;else {
    var options = this.options;
    var fileName = options.randomName ? getRandomName(file.name) : file.name;
    var promise = this.signature.get().then(function (rs) {
      var formData = new window.FormData();
      formData.append('signature', rs.signature);
      formData.append('OSSAccessKeyId', rs.accessId);
      formData.append('policy', rs.policy);
      formData.append('key', options.dir + '/' + fileName);
      formData.append('file', file);
      if (options.hasOwnProperty('successActionStatus')) formData.append('success_action_status', options.successActionStatus);
      return _this.options.uploader(formData);
    }).then(function (rs) {
      return {
        path: '/' + options.dir + '/' + fileName,
        data: rs
      };
    });
    return cacheKey ? promiseCache[cacheKey] = promise : promise;
  }
};
module.exports = Upload;