663380e721
Reviewed By: lblasa Differential Revision: D50500690 fbshipit-source-id: 6f739fe25c232ecfe842337af4399681e85f6a13
105 lines
2.9 KiB
TypeScript
105 lines
2.9 KiB
TypeScript
/**
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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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* @format
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*/
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import net from 'net';
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import fetch from 'node-fetch';
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import {EnvironmentInfo} from 'flipper-common';
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import semver from 'semver';
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/**
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* Checks if a port is in use.
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* @param port The port to check.
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* @returns True if the port is in use. Otherwise, false.
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*/
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export async function checkPortInUse(port: number): Promise<boolean> {
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interface HttpError extends Error {
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code?: string;
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}
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return new Promise((resolve, reject) => {
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const tester = net
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.createServer()
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.once('error', function (err: HttpError) {
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if (err.code != 'EADDRINUSE') return reject(err);
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resolve(true);
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})
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.once('listening', function () {
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tester
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.once('close', function () {
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resolve(false);
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})
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.close();
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})
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.listen(port);
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});
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}
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/**
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* Checks if a running Flipper server is available on the given port.
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* @param port The port to check.
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* @returns If successful, it will return the version of the running
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* Flipper server. Otherwise, undefined.
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*/
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export async function checkServerRunning(
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port: number,
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): Promise<string | undefined> {
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try {
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const response = await fetch(`http://localhost:${port}/info`);
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if (response.status >= 200 && response.status < 300) {
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const environmentInfo: EnvironmentInfo = await response.json();
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return environmentInfo.appVersion;
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} else {
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console.info(
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'[flipper-server] Running instance found, failed with HTTP status code: ',
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response.status,
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);
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}
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} catch (e) {
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console.info(
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`[flipper-server] No running instance found, error found: ${e}`,
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);
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}
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}
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/**
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* Attempts to shutdown an existing Flipper server instance.
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* @param port The port of the running Flipper server
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* @returns Returns true if the shutdown was successful. Otherwise, false.
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*/
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export async function shutdownRunningInstance(port: number): Promise<boolean> {
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try {
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const response = await fetch(`http://localhost:${port}/shutdown`);
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if (response.status >= 200 && response.status < 300) {
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const json = await response.json();
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console.info(
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`[flipper-server] Shutdown request acknowledge: ${json?.success}`,
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);
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return json?.success;
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} else {
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console.warn(
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'[flipper-server] Shutdown request not handled, HTTP status code: ',
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response.status,
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);
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}
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} catch (e) {
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console.warn('[flipper-server] Shutdown request failed with error: ', e);
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}
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return false;
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}
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/**
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* Compares two versions excluding build identifiers
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* (the bit after + in the semantic version string).
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* @return 0 if v1 == v2, 1 if v1 is greater, -1 if v2 is greater.
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*/
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export function compareServerVersion(v1: string, v2: string): number {
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return semver.compare(v1, v2);
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}
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