UNPKG

hybrid-disk-cache

Version:

A hybrid disk cache utilize both the database and the file system.

123 lines (122 loc) 5.75 kB
"use strict"; var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); } return new (P || (P = Promise))(function (resolve, reject) { function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } } function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); } step((generator = generator.apply(thisArg, _arguments || [])).next()); }); }; var __generator = (this && this.__generator) || function (thisArg, body) { var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; function verb(n) { return function (v) { return step([n, v]); }; } function step(op) { if (f) throw new TypeError("Generator is already executing."); while (_) try { if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; if (y = 0, t) op = [op[0] & 2, t.value]; switch (op[0]) { case 0: case 1: t = op; break; case 4: _.label++; return { value: op[1], done: false }; case 5: _.label++; y = op[1]; op = [0]; continue; case 7: op = _.ops.pop(); _.trys.pop(); continue; default: if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } if (t[2]) _.ops.pop(); _.trys.pop(); continue; } op = body.call(thisArg, _); } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; } }; var __importDefault = (this && this.__importDefault) || function (mod) { return (mod && mod.__esModule) ? mod : { "default": mod }; }; Object.defineProperty(exports, "__esModule", { value: true }); exports.purgeEmptyPath = exports.md5name = exports.read = exports.write = void 0; var crypto_1 = require("crypto"); var fs_extra_1 = __importDefault(require("fs-extra")); var path_1 = __importDefault(require("path")); function write(dir, filename, data) { var file = path_1.default.join(dir, filename); fs_extra_1.default.mkdirpSync(file.slice(0, file.lastIndexOf('/'))); return fs_extra_1.default.writeFileSync(file, data); } exports.write = write; function read(dir, filename) { return fs_extra_1.default.readFileSync(path_1.default.join(dir, filename)); } exports.read = read; function md5name(buf) { var md5 = crypto_1.createHash('md5'); var str = md5.update(buf).digest('hex'); var p0 = str.slice(0, 2); var p1 = str.slice(2, 4); var pe = str.slice(4); return [p0, p1, pe].join('/') + '.v'; } exports.md5name = md5name; function purge(dir) { return __awaiter(this, void 0, void 0, function () { var empty, files, _i, files_1, f, sub, stat, _a; return __generator(this, function (_b) { switch (_b.label) { case 0: empty = true; return [4 /*yield*/, fs_extra_1.default.readdir(dir)]; case 1: files = _b.sent(); _i = 0, files_1 = files; _b.label = 2; case 2: if (!(_i < files_1.length)) return [3 /*break*/, 8]; f = files_1[_i]; sub = path_1.default.join(dir, f); return [4 /*yield*/, fs_extra_1.default.stat(sub)]; case 3: stat = _b.sent(); if (!stat.isDirectory()) return [3 /*break*/, 5]; return [4 /*yield*/, purge(sub)]; case 4: _a = (_b.sent()) && empty; return [3 /*break*/, 6]; case 5: _a = false; _b.label = 6; case 6: empty = _a; _b.label = 7; case 7: _i++; return [3 /*break*/, 2]; case 8: if (!empty) return [3 /*break*/, 10]; return [4 /*yield*/, fs_extra_1.default.rmdir(dir)]; case 9: _b.sent(); _b.label = 10; case 10: return [2 /*return*/, empty]; } }); }); } function purgeEmptyPath(dir) { return __awaiter(this, void 0, void 0, function () { return __generator(this, function (_a) { switch (_a.label) { case 0: if (!fs_extra_1.default.pathExistsSync(dir)) return [3 /*break*/, 2]; return [4 /*yield*/, purge(dir)]; case 1: return [2 /*return*/, _a.sent()]; case 2: return [2 /*return*/, false]; } }); }); } exports.purgeEmptyPath = purgeEmptyPath;