fetch.js 2.3 KB

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  1. "use strict";
  2. var __assign = (this && this.__assign) || function () {
  3. __assign = Object.assign || function(t) {
  4. for (var s, i = 1, n = arguments.length; i < n; i++) {
  5. s = arguments[i];
  6. for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
  7. t[p] = s[p];
  8. }
  9. return t;
  10. };
  11. return __assign.apply(this, arguments);
  12. };
  13. Object.defineProperty(exports, "__esModule", { value: true });
  14. var Observable_1 = require("../../Observable");
  15. var Subscription_1 = require("../../Subscription");
  16. function fromFetch(input, init) {
  17. return new Observable_1.Observable(function (subscriber) {
  18. var controller = new AbortController();
  19. var signal = controller.signal;
  20. var abortable = true;
  21. var unsubscribed = false;
  22. var subscription = new Subscription_1.Subscription();
  23. subscription.add(function () {
  24. unsubscribed = true;
  25. if (abortable) {
  26. controller.abort();
  27. }
  28. });
  29. var perSubscriberInit;
  30. if (init) {
  31. if (init.signal) {
  32. if (init.signal.aborted) {
  33. controller.abort();
  34. }
  35. else {
  36. var outerSignal_1 = init.signal;
  37. var outerSignalHandler_1 = function () {
  38. if (!signal.aborted) {
  39. controller.abort();
  40. }
  41. };
  42. outerSignal_1.addEventListener('abort', outerSignalHandler_1);
  43. subscription.add(function () { return outerSignal_1.removeEventListener('abort', outerSignalHandler_1); });
  44. }
  45. }
  46. perSubscriberInit = __assign({}, init, { signal: signal });
  47. }
  48. else {
  49. perSubscriberInit = { signal: signal };
  50. }
  51. fetch(input, perSubscriberInit).then(function (response) {
  52. abortable = false;
  53. subscriber.next(response);
  54. subscriber.complete();
  55. }).catch(function (err) {
  56. abortable = false;
  57. if (!unsubscribed) {
  58. subscriber.error(err);
  59. }
  60. });
  61. return subscription;
  62. });
  63. }
  64. exports.fromFetch = fromFetch;
  65. //# sourceMappingURL=fetch.js.map