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* check source files for license header Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com> * tweak Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com> * add license header to all relevant source files Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>
73 lines
2.5 KiB
TypeScript
73 lines
2.5 KiB
TypeScript
/**
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* Copyright (c) 2021 OpenLens Authors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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import { Readable } from "stream";
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import URLParse from "url-parse";
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interface GetPortArgs {
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/**
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* Should be case insensitive
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* Must have a named matching group called `address`
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*/
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lineRegex: RegExp;
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/**
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* Called when the port is found
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*/
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onFind?: () => void;
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/**
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* Timeout for how long to wait for the port.
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* Default: 5s
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*/
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timeout?: number;
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}
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/**
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* Parse lines from `stream` (assumes data comes in lines) to find the port
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* which the source of the stream is watching on.
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* @param stream A readable stream to match lines against
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* @param args The args concerning the stream
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* @returns A Promise for port number
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*/
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export function getPortFrom(stream: Readable, args: GetPortArgs): Promise<number> {
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return new Promise<number>((resolve, reject) => {
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const handler = (data: any) => {
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const logItem: string = data.toString();
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const match = logItem.match(args.lineRegex);
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if (match) {
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// use unknown protocol so that there is no default port
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const addr = new URLParse(`s://${match.groups.address.trim()}`);
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args.onFind?.();
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stream.off("data", handler);
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clearTimeout(timeoutID);
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resolve(+addr.port);
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}
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};
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const timeoutID = setTimeout(() => {
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stream.off("data", handler);
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reject(new Error("failed to retrieve port from stream"));
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}, args.timeout ?? 5000);
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stream.on("data", handler);
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});
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}
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