express-cache-file/dist/index.js

Express middleware to cache static files in server memory

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.cacheFile = void 0;
const cache_1 = __importDefault(require("./cache"));
const path_1 = require("path");
const fs_1 = __importDefault(require("./fs"));
const size_1 = __importDefault(require("./size"));
function cacheFile(root, options = {}) {
    var _a;
    const redirect = (_a = options.redirect) !== null && _a !== void 0 ? _a : true;
    const cache = {
        capacity: (0, size_1.default)(options.cacheSize),
        usedSize: 0,
        files: {},
    };
    let readFile = (0, fs_1.default)(options.readMode);
    readFile = (0, cache_1.default)(readFile, cache, options.update || {});
    return function (req, res, next) {
        const file = (0, path_1.join)(root, req.path);
        readFile(file, (err, content) => {
            if (redirect && err && err.code === 'EISDIR') {
                const indexFile = (0, path_1.join)(file, 'index.html');
                readFile(indexFile, (err, content) => sendResponse(req, res, next, err, content));
                return;
            }
            return sendResponse(req, res, next, err, content);
        });
    };
}
exports.cacheFile = cacheFile;
function sendResponse(req, res, next, err, content) {
    if (!err)
        return sendContent(res, content);
    if (err.code === 'ENOENT' || err.code === 'EISDIR')
        next();
    else
        next(`Cannot ${req.method} ${req.originalUrl}`);
}
function sendContent(res, content) {
    res.setHeader('Content-Type', content.mimeType);
    res.write(content.buffer);
    res.end();
}
exports.default = cacheFile;