isResolvable.js 1.3 KB

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  1. "use strict";
  2. var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
  3. function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
  4. return new (P || (P = Promise))(function (resolve, reject) {
  5. function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
  6. function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
  7. function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
  8. step((generator = generator.apply(thisArg, _arguments || [])).next());
  9. });
  10. };
  11. Object.defineProperty(exports, "__esModule", { value: true });
  12. const util_1 = require("./util");
  13. /**
  14. * Tries to resolve the hostname. Returns true if succeeds.
  15. *
  16. * @param {String} host is the hostname from the URL.
  17. * @return {Boolean}
  18. */
  19. function isResolvable(host) {
  20. return __awaiter(this, void 0, void 0, function* () {
  21. const family = 4;
  22. try {
  23. if (yield (0, util_1.dnsLookup)(host, { family })) {
  24. return true;
  25. }
  26. }
  27. catch (err) {
  28. // ignore
  29. }
  30. return false;
  31. });
  32. }
  33. exports.default = isResolvable;
  34. //# sourceMappingURL=isResolvable.js.map