compress.js 2.5 KB

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  1. "use strict";
  2. var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
  3. if (k2 === undefined) k2 = k;
  4. var desc = Object.getOwnPropertyDescriptor(m, k);
  5. if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
  6. desc = { enumerable: true, get: function() { return m[k]; } };
  7. }
  8. Object.defineProperty(o, k2, desc);
  9. }) : (function(o, m, k, k2) {
  10. if (k2 === undefined) k2 = k;
  11. o[k2] = m[k];
  12. }));
  13. var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
  14. Object.defineProperty(o, "default", { enumerable: true, value: v });
  15. }) : function(o, v) {
  16. o["default"] = v;
  17. });
  18. var __importStar = (this && this.__importStar) || function (mod) {
  19. if (mod && mod.__esModule) return mod;
  20. var result = {};
  21. if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
  22. __setModuleDefault(result, mod);
  23. return result;
  24. };
  25. Object.defineProperty(exports, "__esModule", { value: true });
  26. exports.createBrotliSizeGetter = exports.createGzipSizeGetter = void 0;
  27. const zlib = __importStar(require("zlib"));
  28. const util_1 = require("util");
  29. const gzip = (0, util_1.promisify)(zlib.gzip);
  30. const brotliCompress = (0, util_1.promisify)(zlib.brotliCompress);
  31. const gzipOptions = (options) => ({
  32. level: 9,
  33. ...options,
  34. });
  35. const brotliOptions = (options, buffer) => ({
  36. params: {
  37. [zlib.constants.BROTLI_PARAM_MODE]: zlib.constants.BROTLI_MODE_TEXT,
  38. [zlib.constants.BROTLI_PARAM_QUALITY]: zlib.constants.BROTLI_MAX_QUALITY,
  39. [zlib.constants.BROTLI_PARAM_SIZE_HINT]: buffer.length,
  40. },
  41. ...options,
  42. });
  43. const createGzipCompressor = (options) => (buffer) => gzip(buffer, gzipOptions(options || {}));
  44. const createGzipSizeGetter = (options) => {
  45. const compress = createGzipCompressor(options);
  46. return async (code) => {
  47. const data = await compress(Buffer.from(code, "utf-8"));
  48. return data.length;
  49. };
  50. };
  51. exports.createGzipSizeGetter = createGzipSizeGetter;
  52. const createBrotliCompressor = (options) => (buffer) => brotliCompress(buffer, brotliOptions(options || {}, buffer));
  53. const createBrotliSizeGetter = (options) => {
  54. const compress = createBrotliCompressor(options);
  55. return async (code) => {
  56. const data = await compress(Buffer.from(code, "utf-8"));
  57. return data.length;
  58. };
  59. };
  60. exports.createBrotliSizeGetter = createBrotliSizeGetter;