ExpressJS Proxy

A lightweight proxy server built with ExpressJS that forwards HTTP requests to a target URL, adding authentication and logging.

Features

• Forwards requests to a specified target URL via the /proxy endpoint
• Adds a Bearer Authorization token to outgoing requests
• Logs all requests and errors in JSON format
• Supports JSON request and response bodies

Requirements

• Node.js v16+
• An API token for authentication

Setup

1. Clone the repository.
2. Install dependencies:

npm install

3. Create a .env file in the project root with the following content:

PORT       = 3000
NODE_ENV   = development
AUTH_TOKEN = your_token_here

Usage

Start the proxy server:

npm run start

Send a request to the proxy endpoint:

POST /proxy?targetUrl=https://api.yourservice.com/endpoint

Body example:

{
    "messages": [
        {
            "role": "role",
            "content": "input"
        }
    ],
    "model": "example-ai",
    "stream": false
}

Project structure

• src/index.js: Main server entry point
• src/config/env.js: Environment variable management
• src/config/logger.js: Simple JSON logger