| 1 | import type { IncomingMessage } from 'http'; |
| 2 | |
| 3 | import { Protocol, ProtocolVersion } from '../../types/UIProtocol'; |
| 4 | import logger from '../../utils/Logger'; |
| 5 | import Utils from '../../utils/Utils'; |
| 6 | |
| 7 | export class UIServerUtils { |
| 8 | private constructor() { |
| 9 | // This is intentional |
| 10 | } |
| 11 | |
| 12 | public static handleProtocols = ( |
| 13 | protocols: Set<string>, |
| 14 | // eslint-disable-next-line @typescript-eslint/no-unused-vars |
| 15 | request: IncomingMessage |
| 16 | ): string | false => { |
| 17 | let protocol: Protocol; |
| 18 | let version: ProtocolVersion; |
| 19 | if (protocols.size === 0) { |
| 20 | return false; |
| 21 | } |
| 22 | for (const fullProtocol of protocols) { |
| 23 | if (UIServerUtils.isProtocolAndVersionSupported(fullProtocol) === true) { |
| 24 | return fullProtocol; |
| 25 | } |
| 26 | } |
| 27 | logger.error( |
| 28 | `${Utils.logPrefix( |
| 29 | ' UI WebSocket Server |' |
| 30 | )} Unsupported protocol: ${protocol} or protocol version: ${version}` |
| 31 | ); |
| 32 | return false; |
| 33 | }; |
| 34 | |
| 35 | public static isProtocolAndVersionSupported = (protocolStr: string): boolean => { |
| 36 | const [protocol, version] = UIServerUtils.getProtocolAndVersion(protocolStr); |
| 37 | return ( |
| 38 | Object.values(Protocol).includes(protocol) === true && |
| 39 | Object.values(ProtocolVersion).includes(version) === true |
| 40 | ); |
| 41 | }; |
| 42 | |
| 43 | public static getProtocolAndVersion = (protocolStr: string): [Protocol, ProtocolVersion] => { |
| 44 | const protocolIndex = protocolStr.indexOf(Protocol.UI); |
| 45 | const protocol = protocolStr.substring( |
| 46 | protocolIndex, |
| 47 | protocolIndex + Protocol.UI.length |
| 48 | ) as Protocol; |
| 49 | const version = protocolStr.substring(protocolIndex + Protocol.UI.length) as ProtocolVersion; |
| 50 | return [protocol, version]; |
| 51 | }; |
| 52 | |
| 53 | public static isLoopback(address: string): boolean { |
| 54 | const isLoopbackRegExp = new RegExp( |
| 55 | // eslint-disable-next-line no-useless-escape |
| 56 | /^localhost$|^127(?:\.\d+){0,2}\.\d+$|^(?:0*\:)*?:?0*1$/, |
| 57 | 'i' |
| 58 | ); |
| 59 | return isLoopbackRegExp.test(address); |
| 60 | } |
| 61 | } |