@cyberblast/webserver/src/BlobLoader.js

A minimal node-based web server

const fs = require("fs");
const path = require('path');

module.exports = class BlobLoader {
  constructor() {
    this.cache = {};
  }

  clear() {
    delete this.cache;
    this.cache = {};
  }

  async get(filePath, useCache = true) {
    const normalized = path.resolve(filePath);

    if (useCache && this.cache[normalized] !== undefined) {
      return this.cache[normalized];
    }

    const file = await this.readFile(filePath);

    if (useCache) this.cache[normalized] = file;
    return file;
  }

  async readFile(filePath) {
    return new Promise((resolve, reject) => {
      fs.readFile(filePath, function(fsError, data) {
        if (fsError) {
          reject(fsError);
          return;
        }
        resolve(data);
      });
    });
  }
}