subhosting

Deno Deploy Subhosting REST API client for JavaScript

This library provides convenient access to the Deno Deploy Subhosting REST API, which allows you to programmatically deploy untrusted, third-party code into the cloud, from server-side JavaScript/TypeScript.

The REST API documentation can be found on apidocs.deno.com. The full API of this library can be found in api.md.

To learn more about Subhosting, check out our documentation.

Installation for Node

Node requires dependencies to be preinstalled before executing your scripts. Install the Subhosting client library from npm using one of the following commands:

npm i --save subhosting
# or
pnpm add subhosting
# or
yarn add subhosting

Usage

Before you begin, you'll need to have a Deno Deploy access token and an ID for the Deno Deploy organization you're using for Subhosting.

• You can find or create a personal access token in the dashboard here
• Your org ID can be found near the top of the page on your Deno Deploy dashboard as described here

The code examples below assume your access token is stored in a DEPLOY_ACCESS_TOKEN environment variable and your Deno Deploy org ID is stored in a DEPLOY_ORG_ID environment variable.

Deno

The following example shows client initialization and usage in Deno:

import Subhosting from "npm:subhosting";

const subhosting = new Subhosting({
  bearerToken: Deno.env.get("DEPLOY_ACCESS_TOKEN"),
});

const organization = await subhosting.organizations.get(
  Deno.env.get("DEPLOY_ORG_ID"),
);

console.log(organization);

Node

The following example shows client initialization and usage in Node:

import Subhosting from "subhosting";

const subhosting = new Subhosting({
  bearerToken: process.env["DEPLOY_ACCESS_TOKEN"], // This is the default and can be omitted
});

async function main() {
  const organization = await subhosting.organizations.get("DEPLOY_ORG_ID");

  console.log(organization.id);
}

main();

Request & Response types

This library includes TypeScript definitions for all request params and response fields. You may import and use them like so:

import Subhosting from "subhosting";

const subhosting = new Subhosting({
  bearerToken: process.env["DEPLOY_ACCESS_TOKEN"], // This is the default and can be omitted
});

async function main() {
  const organization: Subhosting.Organization = await subhosting.organizations
    .get("DEPLOY_ORG_ID");
}

main();

Documentation for each method, request param, and response field are available in docstrings and will appear on hover in most modern editors.

Handling errors

When the library is unable to connect to the API, or if the API returns a non-success status code (i.e., 4xx or 5xx response), a subclass of APIError will be thrown:

async function main() {
  const organization = await subhosting.organizations.get("DEPLOY_ORG_ID")
    .catch((err) => {
      if (err instanceof Subhosting.APIError) {
        console.log(err.status); // 400
        console.log(err.name); // BadRequestError
        console.log(err.headers); // {server: 'nginx', ...}
      } else {
        throw err;
      }
    });
}

main();

Error codes are as followed:

Status Code	Error Type
400	BadRequestError
401	AuthenticationError
403	PermissionDeniedError
404	NotFoundError
422	UnprocessableEntityError
429	RateLimitError
>=500	InternalServerError
N/A	APIConnectionError

Retries

Certain errors will be automatically retried 2 times by default, with a short exponential backoff. Connection errors (for example, due to a network connectivity problem), 408 Request Timeout, 409 Conflict, 429 Rate Limit, and

=500 Internal errors will all be retried by default.

You can use the maxRetries option to configure or disable this:

// Configure the default for all requests:
const subhosting = new Subhosting({
  maxRetries: 0, // default is 2
});

// Or, configure per-request:
await subhosting.organizations.get("DEPLOY_ORG_ID", {
  maxRetries: 5,
});

Timeouts

Requests time out after 1 minute by default. You can configure this with a timeout option:

// Configure the default for all requests:
const subhosting = new Subhosting({
  timeout: 20 * 1000, // 20 seconds (default is 1 minute)
});

// Override per-request:
await subhosting.organizations.get("DEPLOY_ORG_ID", {
  timeout: 5 * 1000,
});

On timeout, an APIConnectionTimeoutError is thrown.

Note that requests which time out will be retried twice by default.

Advanced Usage

Accessing raw Response data (e.g., headers)

The "raw" Response returned by fetch() can be accessed through the .asResponse() method on the APIPromise type that all methods return.

You can also use the .withResponse() method to get the raw Response along with the parsed data.

const subhosting = new Subhosting();

const response = await subhosting.organizations.get("DEPLOY_ORG_ID")
  .asResponse();
console.log(response.headers.get("X-My-Header"));
console.log(response.statusText); // access the underlying Response object

const { data: organization, response: raw } = await subhosting.organizations
  .get("DEPLOY_ORG_ID")
  .withResponse();
console.log(raw.headers.get("X-My-Header"));
console.log(organization.id);

Customizing the fetch client

By default, this library uses node-fetch in Node, and expects a global fetch function in other environments.

If you would prefer to use a global, web-standards-compliant fetch function even in a Node environment, (for example, if you are running Node with --experimental-fetch or using NextJS which polyfills with undici), add the following import before your first import from "Subhosting":

// Tell TypeScript and the package to use the global web fetch instead of node-fetch.
// Note, despite the name, this does not add any polyfills, but expects them to be provided if needed.
import "subhosting/shims/web";
import Subhosting from "subhosting";

To do the inverse, add import "subhosting/shims/node" (which does import polyfills). This can also be useful if you are getting the wrong TypeScript types for Response - more details here.

You may also provide a custom fetch function when instantiating the client, which can be used to inspect or alter the Request or Response before/after each request:

import { fetch } from "undici"; // as one example
import Subhosting from "subhosting";

const client = new Subhosting({
  fetch: async (url: RequestInfo, init?: RequestInfo): Promise<Response> => {
    console.log("About to make a request", url, init);
    const response = await fetch(url, init);
    console.log("Got response", response);
    return response;
  },
});

Note that if given a DEBUG=true environment variable, this library will log all requests and responses automatically. This is intended for debugging purposes only and may change in the future without notice.

Configuring an HTTP(S) Agent (e.g., for proxies)

By default, this library uses a stable agent for all http/https requests to reuse TCP connections, eliminating many TCP & TLS handshakes and shaving around 100ms off most requests.

If you would like to disable or customize this behavior, for example to use the API behind a proxy, you can pass an httpAgent which is used for all requests (be they http or https), for example:

import http from "http";
import HttpsProxyAgent from "https-proxy-agent";

// Configure the default for all requests:
const subhosting = new Subhosting({
  httpAgent: new HttpsProxyAgent(process.env.PROXY_URL),
});

// Override per-request:
await subhosting.organizations.get("DEPLOY_ORG_ID", {
  baseURL: "http://localhost:8080/test-api",
  httpAgent: new http.Agent({ keepAlive: false }),
});

Semantic Versioning

This package generally follows SemVer conventions, though certain backwards-incompatible changes may be released as minor versions:

• Changes that only affect static types, without breaking runtime behavior.
• Changes to library internals which are technically public but not intended or documented for external use. (Please open a GitHub issue to let us know if you are relying on such internals).
• Changes that we do not expect to impact the vast majority of users in practice.

We take backwards-compatibility seriously and work hard to ensure you can rely on a smooth upgrade experience.

We are keen for your feedback; please open an issue with questions, bugs, or suggestions.

Requirements

TypeScript >= 4.5 is supported.

The following runtimes are supported:

• Node.js 18 LTS or later (non-EOL) versions.
• Deno v1.28.0 or higher, using import Subhosting from "npm:subhosting".
• Bun 1.0 or later.
• Cloudflare Workers.
• Vercel Edge Runtime.
• Jest 28 or greater with the "node" environment ("jsdom" is not supported at this time).
• Nitro v2.6 or greater.

Note that React Native is not supported at this time.

If you are interested in other runtime environments, please open or upvote an issue on GitHub.