readAsBinaryString.js 2.1 KB

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  1. /*
  2. *
  3. * Licensed to the Apache Software Foundation (ASF) under one
  4. * or more contributor license agreements. See the NOTICE file
  5. * distributed with this work for additional information
  6. * regarding copyright ownership. The ASF licenses this file
  7. * to you under the Apache License, Version 2.0 (the
  8. * "License"); you may not use this file except in compliance
  9. * with the License. You may obtain a copy of the License at
  10. *
  11. * http://www.apache.org/licenses/LICENSE-2.0
  12. *
  13. * Unless required by applicable law or agreed to in writing,
  14. * software distributed under the License is distributed on an
  15. * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  16. * KIND, either express or implied. See the License for the
  17. * specific language governing permissions and limitations
  18. * under the License.
  19. *
  20. */
  21. /*
  22. * readAsBinaryString
  23. *
  24. * IN:
  25. * args
  26. * 0 - URL of file to read
  27. * 1 - start position
  28. * 2 - end position
  29. * OUT:
  30. * success - BinaryString contents of file
  31. * fail - FileError
  32. */
  33. var resolve = cordova.require('cordova-plugin-file.resolveLocalFileSystemURIProxy'),
  34. requestAnimationFrame = cordova.require('cordova-plugin-file.bb10RequestAnimationFrame');
  35. module.exports = function (success, fail, args) {
  36. var uri = args[0],
  37. start = args[1],
  38. end = args[2],
  39. onSuccess = function (data) {
  40. if (typeof success === 'function') {
  41. success(data);
  42. }
  43. },
  44. onFail = function (error) {
  45. if (typeof fail === 'function') {
  46. if (error && error.code) {
  47. fail(error.code);
  48. } else {
  49. fail(error);
  50. }
  51. }
  52. };
  53. resolve(function (fs) {
  54. requestAnimationFrame(function () {
  55. fs.nativeEntry.file(function (file) {
  56. var reader = new FileReader()._realReader;
  57. reader.onloadend = function () {
  58. onSuccess(this.result.substring(start, end));
  59. };
  60. reader.onerror = onFail;
  61. reader.readAsBinaryString(file);
  62. }, onFail);
  63. });
  64. }, fail, [uri]);
  65. };