@webex/http-core/dist/lib/detect.js

Core HTTP library for the Cisco Webex

"use strict";

var _Object$defineProperty = require("@babel/runtime-corejs2/core-js/object/define-property");
var _interopRequireDefault = require("@babel/runtime-corejs2/helpers/interopRequireDefault");
_Object$defineProperty(exports, "__esModule", {
  value: true
});
exports.default = detect;
var _regenerator = _interopRequireDefault(require("@babel/runtime-corejs2/regenerator"));
var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime-corejs2/helpers/asyncToGenerator"));
var _fileType = require("file-type");
/*!
 * Copyright (c) 2015-2020 Cisco Systems, Inc. See LICENSE file.
 */
/**
 * Determine mimeType for the specified buffer;
 * @param {Buffer|Uint8Array|ArrayBuffer} buffer
 * @returns {Promise<string>}
 */
function detect(_x) {
  return _detect.apply(this, arguments);
}
function _detect() {
  _detect = (0, _asyncToGenerator2.default)( /*#__PURE__*/_regenerator.default.mark(function _callee(buffer) {
    var fileType;
    return _regenerator.default.wrap(function _callee$(_context) {
      while (1) switch (_context.prev = _context.next) {
        case 0:
          if (!(!(buffer instanceof Blob) && !(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array))) {
            _context.next = 2;
            break;
          }
          throw new Error('`detect` requires a buffer of type Blob, ArrayBuffer, or Uint8Array');
        case 2:
          if (!(buffer instanceof Blob)) {
            _context.next = 4;
            break;
          }
          return _context.abrupt("return", buffer.type);
        case 4:
          _context.next = 6;
          return (0, _fileType.fromBuffer)(buffer);
        case 6:
          fileType = _context.sent;
          if (fileType) {
            _context.next = 9;
            break;
          }
          return _context.abrupt("return", 'application/octet-stream');
        case 9:
          return _context.abrupt("return", fileType.mime);
        case 10:
        case "end":
          return _context.stop();
      }
    }, _callee);
  }));
  return _detect.apply(this, arguments);
}
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