49 lines
1.2 KiB
TypeScript
49 lines
1.2 KiB
TypeScript
const DEFAULT_SERVER_PORT = 4096
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const MAX_PORT_ATTEMPTS = 20
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export async function isPortAvailable(port: number, hostname: string = "127.0.0.1"): Promise<boolean> {
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try {
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const server = Bun.serve({
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port,
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hostname,
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fetch: () => new Response(),
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})
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server.stop(true)
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return true
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} catch {
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return false
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}
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}
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export async function findAvailablePort(
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startPort: number = DEFAULT_SERVER_PORT,
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hostname: string = "127.0.0.1"
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): Promise<number> {
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for (let attempt = 0; attempt < MAX_PORT_ATTEMPTS; attempt++) {
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const port = startPort + attempt
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if (await isPortAvailable(port, hostname)) {
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return port
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}
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}
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throw new Error(`No available port found in range ${startPort}-${startPort + MAX_PORT_ATTEMPTS - 1}`)
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}
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export interface AutoPortResult {
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port: number
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wasAutoSelected: boolean
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}
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export async function getAvailableServerPort(
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preferredPort: number = DEFAULT_SERVER_PORT,
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hostname: string = "127.0.0.1"
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): Promise<AutoPortResult> {
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if (await isPortAvailable(preferredPort, hostname)) {
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return { port: preferredPort, wasAutoSelected: false }
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}
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const port = await findAvailablePort(preferredPort + 1, hostname)
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return { port, wasAutoSelected: true }
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}
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export { DEFAULT_SERVER_PORT }
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