@cloud-cli/proxy

HTTP(S) Proxy server

Settings

certificatesFolder:

The server automatically loads SSL certificates from a folder, where each subfolder is a domain name. Sub-domains are automatically resolved to their parent domain when requested. sub.example.com will use the certificate from example.com if available.

For example, to load certs for *.foo.com and *.example.com:

const settings = new ProxySettings({
  certificatesFolder: '/var/ssl',
  certificateFile: 'cert.pem',
  keyFile: 'cert.key',
});

$ ls /var/ssl/*

/var/ssl/foo.com:
cert.pem
cert.key

/var/ssl/example.com:
cert.pem
cert.key

certificateFile/keyFile:

Names of the files from where certificates are loaded.

Defaults:

const settings = new ProxySettings({
  certificateFile = 'fullchain.pem';
  keyFile = 'privkey.pem';
});

httpPort/httpsPort:

Allow you to change the http ports. Defaults are 80 and 443

const settings = new ProxySettings({
  httpPort: 3000,
  httpsPort: 3443,
});

headers:

Adds headers to the proxy request transparently, so API calls can be proxied without exposing credentials.

Use key/value pairs separated by a bar. Spaces around are ignored.

Example authentication: bearer abc123 | x-custom-header: 123

Usage

import { ProxyServer, ProxySettings, ProxyEntry } from '@cloud-cli/proxy';

// set up the proxy instance
const settings = new ProxySettings({ ... });

// create a server
const server = new ProxyServer(settings);

// create internal HTTP/HTTPS servers
server.createServers();

// start HTTP/HTTPS servers
server.start();

// add a proxy entry
server.add(new ProxyEntry({...}));

// use it to reset all proxy entries and close running HTTP ports
server.reset();

// reload certificates for all proxy entries.
// each server reloads all certificates once per day
server.reload();

// OPTIONAL: handle a request coming from another http(s) server
server.handleRequest(request, response, /* isSSL */ false);

Example

import { ProxyServer, ProxySettings, ProxyEntry } from '@cloud-cli/proxy';

const settings = new ProxySettings({
  certificatesFolder: '/path/to/ssl',
});

const server = new ProxyServer(settings);
server.start();

// http://example.com => (redirect 302) https://www.example.com/
server.add(
  new ProxyEntry({
    domain: 'example.com',
    redirectToDomain: 'www.example.com',
  }),
);

// http://old.example.com => (redirect 302) https://www.example.com/
server.add(
  new ProxyEntry({
    domain: 'old.example.com',
    redirectToUrl: 'https://www.example.com/',
  }),
);

// http://www.example.com => (forward to) http://localhost:1234/
server.add(
  new ProxyEntry({
    domain: 'www.example.com',
    target: 'http://localhost:1234/',
  }),
);

Environment variables

var	description
DEBUG	Enable debug logging
PROXY_CERTS_FOLDER	Path to a folder where SSL certificates are stored
HTTP_PORT	Number. Same as ProxySettings#httpPort
HTTPS_PORT	Number. Same as ProxySettings#httpsPort

http-proxy

This module also provides an executable to run as a standalone server.

Options can be either provided as a JSON file (proxy.config.json) or an ES module (proxy.config.mjs). The format is defined in src/cli.mts. It is the same as ProxySettings + an array of ProxyEntry;

To run the proxy, just call http-proxy in the same folder as the configuration file:

$ http-proxy

Full configuration

{
  "httpPort": 80,
  "httpsPort": 443,
  "autoReload": 3600,
  "certificatesFolder": "/etc/ssl",
  "certificateFile": "fullchain.pem",
  "keyFile": "privkey.pem",
  "proxies": [
    {
      "domain": "example.com",
      "redirectToDomain": "www.example.com"
    },
    {
      "domain": "old.example.com",
      "redirectToUrl": "https://www.example.com"
    },
    {
      "domain": "www.example.com",
      "headers": "x-key: deadbeef",
      "target": "http://localhost:1234/"
    }
  ]
}