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41 lines
1002 B
JavaScript
41 lines
1002 B
JavaScript
const shim = require('./shim').default;
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const netUtils = {};
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netUtils.ip = async () => {
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const response = await shim.fetch('https://api.ipify.org/?format=json');
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if (!response.ok) {
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throw new Error(`Could not retrieve IP: ${await response.text()}`);
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}
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const ip = await response.json();
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return ip.ip;
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};
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netUtils.findAvailablePort = async (possiblePorts, extraRandomPortsToTry = 20) => {
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const tcpPortUsed = require('tcp-port-used');
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for (let i = 0; i < extraRandomPortsToTry; i++) {
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possiblePorts.push(Math.floor(8000 + Math.random() * 2000));
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}
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let port = null;
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for (let i = 0; i < possiblePorts.length; i++) {
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const inUse = await tcpPortUsed.check(possiblePorts[i]);
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if (!inUse) {
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port = possiblePorts[i];
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break;
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}
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}
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return port;
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};
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netUtils.mimeTypeFromHeaders = headers => {
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if (!headers || !headers['content-type']) return null;
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const splitted = headers['content-type'].split(';');
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return splitted[0].trim().toLowerCase();
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};
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module.exports = { netUtils };
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