75 lines
2.0 KiB
JavaScript
75 lines
2.0 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true,
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});
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exports.default = isDevServerRunning;
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var _net = _interopRequireDefault(require("net"));
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var _nodeFetch = _interopRequireDefault(require("node-fetch"));
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function _interopRequireDefault(obj) {
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return obj && obj.__esModule ? obj : { default: obj };
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}
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*
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* @format
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* @oncall react_native
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*/
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/**
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* Determine whether we can run the dev server.
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*
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* Return values:
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* - `not_running`: The port is unoccupied.
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* - `matched_server_running`: The port is occupied by another instance of this
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* dev server (matching the passed `projectRoot`).
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* - `port_taken`: The port is occupied by another process.
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* - `unknown`: An error was encountered; attempt server creation anyway.
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*/
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async function isDevServerRunning(scheme, host, port, projectRoot) {
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try {
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if (!(await isPortOccupied(host, port))) {
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return "not_running";
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}
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const statusResponse = await (0, _nodeFetch.default)(
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`${scheme}://${host}:${port}/status`
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);
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const body = await statusResponse.text();
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return body === "packager-status:running" &&
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statusResponse.headers.get("X-React-Native-Project-Root") === projectRoot
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? "matched_server_running"
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: "port_taken";
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} catch (e) {
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return "unknown";
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}
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}
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async function isPortOccupied(host, port) {
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let result = false;
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const server = _net.default.createServer();
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return new Promise((resolve, reject) => {
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server.once("error", (e) => {
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server.close();
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if (e.code === "EADDRINUSE") {
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result = true;
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} else {
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reject(e);
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}
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});
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server.once("listening", () => {
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result = false;
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server.close();
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});
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server.once("close", () => {
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resolve(result);
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});
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server.listen({
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host,
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port,
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});
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});
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}
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