@arcjet/transport/index.js

Transport mechanisms for the Arcjet protocol

import { Http2SessionManager, createConnectTransport } from '@connectrpc/connect-node';

/**
 * Create a transport that talks over HTTP/2 using Connect RPC.
 *
 * A thin wrapper around {@linkcode createConnectTransport}.
 *
 * @param baseUrl
 *   Base URI for all HTTP requests (example: `https://example.com/my-api`).
 * @returns
 *   Connect transport used to make RPC calls.
 */
function createTransport(baseUrl) {
    // We create our own session manager so we can attempt to pre-connect
    const sessionManager = new Http2SessionManager(baseUrl, {
        // AWS Global Accelerator doesn't support PING so we use a very high idle
        // timeout. Ref:
        // https://docs.aws.amazon.com/global-accelerator/latest/dg/introduction-how-it-works.html#about-idle-timeout
        idleConnectionTimeoutMs: 340 * 1000,
    });
    // We ignore the promise result because this is an optimistic pre-connect
    sessionManager.connect();
    return createConnectTransport({
        baseUrl,
        httpVersion: "2",
        sessionManager,
    });
}

export { createTransport };