upload_sdk/index.js

'use strict';

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

var _contants = require('./contants');

var _utils = require('./utils');

var _utils2 = _interopRequireDefault(_utils);

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

function FileFactory(file) {
  this.offset = 0; //用于断点续传，默认为 0
  this.BYTES_PER_CHUNK = 1024 * 1024;
  this.file = file;
  this.fileSize = file.size;
  this.fileType = file.name.split('.')[1].toLowerCase();
  this.chunkNum = this.BYTES_PER_CHUNK > this.fileSize ? Math.ceil(this.fileSize / this.BYTES_PER_CHUNK) : 1;
  this.chunkSize = this.BYTES_PER_CHUNK > this.fileSize ? this.fileSize : this.BYTES_PER_CHUNK;
}

FileFactory.prototype.setOffset = function (offset) {
  this.offset = offset;
};

function UploadSdk(host, origin, token, file) {

  this.handlers = []; //用于处理出触发事件
  this.host = host.indexOf('http:') > -1 ? 'http:' + host : host;
  this.origin = origin;
  this.token = token;
  this.file = file;

  this.generateMd5 = function (callback) {
    (0, _utils2.default)(this.file).then(function (result) {
      callback(result);
    });
  };

  this.imageUploadAction = function () {
    var _this = this;

    return new Promise(function (resolve, reject) {
      var fileFactory = new FileFactory(_this.file);
      if (!fileFactory.fileType.match('[(jpg)|(png)|(gif)]+$')) {
        reject(_contants.Constants.IMAGE_TYPE_ERROR);
      }
      _this.generateMd5(function (md5) {
        _this.md5 = md5;
        _this.postImage(_this.md5, fileFactory).then(function (res) {
          resolve(res);
        }).catch(function (err) {
          reject(err);
        });
      });
    });
  };

  this.videoUploadAction = function () {
    var _this2 = this;

    return new Promise(function (resolve, reject) {
      if (!_this2.file.type.match('[(mp4)|(rmvb)|(flv)|(mpeg)|(avi)]+$')) {
        reject(_contants.Constants.VIDOE_TYPE_ERROR);
      }
      _this2.postVideo().then(function (res) {
        resolve(res);
      }).catch(function (err) {
        reject(err);
      });
    });
  };

  this.postVideo = function () {
    var _this3 = this;

    var self = this;
    return new Promise(function (resolve, reject) {
      var xhr = new XMLHttpRequest();
      xhr.open('POST', _this3.host + _contants.Constants.VIDEO_MULTIPART + _this3.origin, true);
      xhr.withCredentials = true;
      xhr.setRequestHeader('Authorization', 'Bearer ' + _this3.token);
      xhr.setRequestHeader('Content-type', 'application/json');
      xhr.upload.addEventListener("progress", function updateProgress(oEvent) {
        if (oEvent.lengthComputable) {
          var percentComplete = oEvent.loaded / oEvent.total * 100;
          self.emitUpdateProgress(percentComplete);
        }
      }, false);
      var fd = new FormData();
      fd.append('file', _this3.file);
      fd.append('code_rate', 'ld,sd,hd');
      xhr.send(fd);
      xhr.onreadystatechange = function () {
        if (xhr.readyState === 4) {
          var obj = JSON.parse(xhr.responseText);
          if (xhr.status === 304 || xhr.status >= 200 && xhr.status < 300) {
            resolve({
              code: _contants.Constants.UPLOAD_SUCCESS_CODE,
              url: obj.url,
              msg: 'success'
            });
          } else {
            reject({
              code: _contants.Constants.UPLOAD_FAILED_CODE,
              url: '',
              msg: obj.message
            });
          }
        }
      };
    });
  };

  this.postImage = function (md5, fileFactory) {
    var _this4 = this;

    var self = this;
    return new Promise(function (resolve, reject) {
      var xhr = new XMLHttpRequest();
      xhr.upload.addEventListener("progress", function updateProgress(oEvent) {
        if (oEvent.lengthComputable) {
          var percentComplete = oEvent.loaded / oEvent.total * 100;
          self.emitUpdateProgress(percentComplete);
        }
      }, false);
      xhr.open('POSt', _this4.host + _contants.Constants.IMAGE_MULTIPART + _this4.origin, true);
      xhr.withCredentials = true;
      xhr.setRequestHeader('Authorization', 'Bearer ' + _this4.token);
      xhr.setRequestHeader('X-Upload-File-Size', fileFactory.fileSize);
      xhr.setRequestHeader('X-Upload-Chunk-Index', 1 + '');
      xhr.setRequestHeader('X-Upload-Chunk-Num', fileFactory.chunkNum);
      xhr.setRequestHeader('X-Upload-Chunk-Size', fileFactory.chunkSize);
      xhr.setRequestHeader('X-Upload-Offset', fileFactory.offset + '');
      xhr.setRequestHeader('X-Upload-File-Md5', md5);
      xhr.setRequestHeader('X-Upload-File-Type', fileFactory.fileType);
      var fd = new FormData();
      fd.append('file', _this4.file);
      xhr.send(fd);
      xhr.onreadystatechange = function () {
        if (xhr.readyState === 4) {
          var obj = JSON.parse(xhr.responseText);
          if (xhr.status === 304 || xhr.status >= 200 && xhr.status < 300) {

            if (obj.status === 1) {
              resolve({
                code: _contants.Constants.UPLOAD_SUCCESS_CODE,
                url: obj.url,
                msg: 'success'
              });
            } else if (obj.status === 0) {
              fileFactory.setOffset(obj.msg);
              this.getAllResponseHeaders.postImage(md5, fileFactory);
            }
          } else {
            reject({
              code: _contants.Constants.UPLOAD_FAILED_CODE,
              url: '',
              msg: obj.message
            });
          }
        }
      };
    });
  };
}

UploadSdk.prototype = {

  onUpdateProgress: function onUpdateProgress(subscriber) {
    var isExist = this.handlers.some(function (item) {
      return item == subscriber;
    });
    if (!isExist) {
      this.handlers.push(subscriber);
    }
    return this;
  },

  emitUpdateProgress: function emitUpdateProgress(data) {
    this.handlers.forEach(function (fn) {
      fn(data);
    });
    return this;
  }
};