"use strict";
/*
 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
 *  License: AGPLv3 s.t. "Commons Clause" – see LICENSE.md for details
 */
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 });
var logger_1 = require("@cocalc/backend/logger");
var path_to_files_1 = __importDefault(require("./path-to-files"));
var authenticate_1 = __importDefault(require("./authenticate"));
var get_vhost_info_1 = __importDefault(require("./get-vhost-info"));
var handle_raw_1 = require("./handle-raw");
var base_path_1 = __importDefault(require("@cocalc/backend/base-path"));
var logger = (0, logger_1.getLogger)("virtual-hosts");
function virtualHostsMiddleware() {
    // we return the middleware to match the standard pattern for express,
    // and give more flexibility.
    return function (req, res, next) {
        var _a;
        return __awaiter(this, void 0, void 0, function () {
            var vhost, info, path, isAuth, dir;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        vhost = (_a = req.headers.host) === null || _a === void 0 ? void 0 : _a.toLowerCase();
                        // const vhost = "vertramp.org";
                        // const vhost = "python-wasm.org";
                        if (vhost == null) {
                            // logger.debug("no host header set");
                            next();
                            return [2 /*return*/];
                        }
                        logger.debug("checking for vhost", vhost);
                        return [4 /*yield*/, (0, get_vhost_info_1.default)(vhost)];
                    case 1:
                        info = _b.sent();
                        if (info == null) {
                            // logger.debug("no vhost info for ", vhost);
                            next();
                            return [2 /*return*/];
                        }
                        path = req.url;
                        if (base_path_1.default && base_path_1.default != "/") {
                            // This is only going to happen in case of doing
                            // cc-in-cc development.
                            path = req.url.slice(base_path_1.default.length);
                        }
                        if (path == "") {
                            path = "/";
                        }
                        isAuth = (0, authenticate_1.default)({
                            req: req,
                            res: res,
                            path: path,
                            auth: info.auth,
                        });
                        if (!isAuth) {
                            logger.debug("not authenticated -- denying vhost='%s', path='%s'", vhost, path);
                            res.status(403).end();
                            return [2 /*return*/];
                        }
                        if (info.cross_origin_isolation) {
                            // The following two headers make it possible to serve content that used
                            // SharedArrayBuffer from vhosts and raw shared content.  This is very
                            // important as it is a prerequisite for modern use of WebAssembly.
                            // E.g., https://python-wasm.cocalc.com uses this.
                            res.setHeader("Cross-origin-Embedder-Policy", "require-corp");
                            res.setHeader("Cross-origin-Opener-Policy", "same-origin");
                        }
                        dir = (0, path_to_files_1.default)(info.project_id, info.path);
                        /* logger.debug(
                          "serving virtual host path -- vhost='%s',dir='%s'",
                          vhost,
                          dir
                        ); */
                        req.url = path;
                        (0, handle_raw_1.staticHandler)(dir, req, res, function () {
                            res.status(404).end();
                        });
                        return [2 /*return*/];
                }
            });
        });
    };
}
exports.default = virtualHostsMiddleware;
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