smc-hub
Version:
CoCalc: Backend webserver component
139 lines • 7.12 kB
JavaScript
;
// Websocket support
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 lru_cache_1 = __importDefault(require("lru-cache"));
var http_proxy_1 = require("http-proxy");
var version_1 = require("./version");
var target_1 = require("./target");
var logger_1 = __importDefault(require("../logger"));
var util_1 = require("./util");
var winston = logger_1.default("proxy: handle-upgrade");
function init(_a, proxy_regexp) {
var _this = this;
var projectControl = _a.projectControl, isPersonal = _a.isPersonal;
var cache = new lru_cache_1.default({
max: 5000,
maxAge: 1000 * 60 * 3,
});
var re = new RegExp(proxy_regexp);
function handleProxyUpgradeRequest(req, socket, head) {
var _a;
return __awaiter(this, void 0, void 0, function () {
var dbg, url, _b, host, port, internal_url, target, proxy_1, proxy;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
dbg = function (m) {
winston.silly(req.url + ": " + m);
};
dbg("got upgrade request");
if (!isPersonal && version_1.versionCheckFails(req)) {
dbg("version check failed");
return [2 /*return*/];
}
if (!req.url.match(re)) {
dbg("nothing to do; req.url=\"" + req.url + "\" doesn't need to be proxied");
return [2 /*return*/];
}
url = util_1.stripBasePath(req.url);
dbg("calling getTarget");
return [4 /*yield*/, target_1.getTarget({
url: url,
isPersonal: isPersonal,
projectControl: projectControl,
})];
case 1:
_b = _c.sent(), host = _b.host, port = _b.port, internal_url = _b.internal_url;
dbg("got " + host + ", " + port);
target = "ws://" + host + ":" + port;
if (internal_url != null) {
req.url = internal_url;
}
if (cache.has(target)) {
dbg("using cache");
proxy_1 = cache.get(target);
(_a = proxy_1) === null || _a === void 0 ? void 0 : _a.ws(req, socket, head);
return [2 /*return*/];
}
dbg("target = " + target);
dbg("not using cache");
proxy = http_proxy_1.createProxyServer({
ws: true,
target: target,
timeout: 0,
});
cache.set(target, proxy);
proxy.on("error", function (err) {
winston.debug("websocket proxy error, so clearing cache -- " + err);
cache.del(target);
});
proxy.on("close", function () {
dbg("websocket proxy close, so removing from cache");
cache.del(target);
});
proxy.ws(req, socket, head);
return [2 /*return*/];
}
});
});
}
return function (req, socket, head) { return __awaiter(_this, void 0, void 0, function () {
var err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
return [4 /*yield*/, handleProxyUpgradeRequest(req, socket, head)];
case 1:
_a.sent();
return [3 /*break*/, 3];
case 2:
err_1 = _a.sent();
winston.debug("error upgrading to websocket url=" + req.url + " -- " + err_1);
return [3 /*break*/, 3];
case 3: return [2 /*return*/];
}
});
}); };
}
exports.default = init;
//# sourceMappingURL=handle-upgrade.js.map