oss-upload.js/lib/fileMd5.js

The browser directly uploads files to oss

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.fileMd5 = fileMd5;
exports.stopMd5 = stopMd5;

var _sparkMd = _interopRequireDefault(require("spark-md5"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var aborted = false;

function fileMd5(file, md5Fn, progressFn) {
  var progress = 0;
  var currentChunk = 0;
  var blobSlice = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice;
  var chunkSize = 2097152;
  var chunks = Math.ceil(file.size / chunkSize);
  var spark = new _sparkMd.default.ArrayBuffer();
  var reader = new FileReader();
  loadNext();

  reader.onloadend = function (e) {
    spark.append(e.target.result); // Append array buffer

    currentChunk++;
    progress = currentChunk / chunks;

    if (progressFn && typeof progressFn === 'function') {
      progressFn(progress);
    }

    if (aborted) {
      md5Fn('aborted');
      return;
    }

    if (currentChunk < chunks) {
      loadNext();
    } else {
      md5Fn(null, spark.end());
    }
  };

  function loadNext() {
    var start = currentChunk * chunkSize;
    var end = start + chunkSize >= file.size ? file.size : start + chunkSize;
    reader.readAsArrayBuffer(blobSlice.call(file, start, end));
  }
}

function stopMd5() {
  aborted = true;
}