Function resolveHttpServer

packages/vite/src/node/http.ts:119–144

(
  app: Connect.Server,
  httpsOptions?: HttpsServerOptions,
)

export type CorsOrigin = boolean | string | RegExp | (string | RegExp)[]

export async function resolveHttpServer(
  app: Connect.Server,
  httpsOptions?: HttpsServerOptions,
): Promise<HttpServer> {
  if (!httpsOptions) {
    const { createServer } = await import('node:http')
    return createServer(app)
  }

  const { createSecureServer } = await import('node:http2')
  return createSecureServer(
    {
      // Manually increase the session memory to prevent 502 ENHANCE_YOUR_CALM
      // errors on large numbers of requests
      maxSessionMemory: 1000,
      // Increase the stream reset rate limit to prevent net::ERR_HTTP2_PROTOCOL_ERROR
      // errors on large numbers of requests
      streamResetBurst: 100000,
      streamResetRate: 33,
      ...httpsOptions,
      allowHTTP1: true,
    },
    // @ts-expect-error TODO: is this correct?
    app,
  )
}

export async function resolveHttpsConfig(
  https: HttpsServerOptions | undefined,