superstatic/lib/middleware/env.js

A static file server for fancy apps

"use strict";
/**
 * Copyright (c) 2022 Google LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.env = void 0;
const fs = require("fs");
const mime = require("mime-types");
const template = fs
    .readFileSync(`${__dirname}/../../templates/env.js.template`)
    .toString();
/**
 * Returns middleware for `/__/env.json|js`.
 * @param spec superstatic options.
 * @param spec.env environment variables.
 * @return middleware.
 */
function env(spec) {
    return (req, res, next) => {
        // const config = req.superstatic.env;
        let env = undefined;
        if (spec.env || req.superstatic.env) {
            env = Object.assign({}, req.superstatic.env, spec.env);
        }
        else {
            return next();
        }
        if (req.url === "/__/env.json") {
            res.superstatic.handleData({
                data: JSON.stringify(env, null, 2),
                contentType: mime.contentType("json") || "",
            });
        }
        else if (req.url === "/__/env.js") {
            const payload = template.replace("{{ENV}}", JSON.stringify(env));
            res.superstatic.handleData({
                data: payload,
                contentType: mime.contentType("js") || "",
            });
        }
        return next();
    };
}
exports.env = env;
module.exports = env;