Make API endpoint a configuration

[mohsen1]

--api should allow replacing existing API endpoint with user provided API. This will enable using things like OpenRouter

[Sibghataziz]

I think this will do the work

const express = require("express");
const bodyParser = require("body-parser");
const axios = require("axios");

const app = express();
app.use(bodyParser.json()); // Middleware to parse JSON requests

// Default API endpoint
const defaultApiEndpoint = "https://default-api.com";
let currentApiEndpoint = defaultApiEndpoint; // Initialize with the default endpoint

// Function to validate the URL
function validateUrl(url) {
  try {
    new URL(url); // Throws an error if the URL is invalid
    return true;
  } catch (error) {
    throw new Error("Invalid URL provided.");
  }
}

// Function to get the current API endpoint
function getEndpoint() {
  return currentApiEndpoint;
}

// Function to set the current API endpoint
function setEndpoint(req) {
  if (!validateUrl(req.body.url)) {
    throw new Error("Invalid URL provided.");
  }
  currentApiEndpoint = req.body.url; // Update the current API endpoint
}

// Endpoint to set the user-provided API
app.post("/set-api-endpoint", (req, res) => {
  try {
    setEndpoint(req);
    res.status(200).json({ message: `API endpoint updated to: ${getEndpoint()}` });
  } catch (error) {
    res.status(400).json({ error: error.message });
  }
});

// Endpoint to fetch data using the current API endpoint, with headers in the body
app.post("/fetch-data", async (req, res) => {
  const { headers, body, path } = req.body;

  // Validate that required fields are provided
  if (!headers || !body || !path) {
    return res.status(400).json({ error: "Missing required fields: headers, body, and path" });
  }

  const url = `${getEndpoint()}/${path}`; // Get the current API endpoint dynamically

  try {
    const response = await axios.post(url, body, { headers });
    res.status(200).json(response.data);
  } catch (error) {
    const status = error.response?.status || 500;
    const message = error.response?.data || error.message;
    res.status(status).json({ error: `Failed to fetch data: ${message}` });
  }
});

// Default route to display the current API endpoint
app.get("/", (req, res) => {
  res.send(`Current API endpoint: ${getEndpoint()}`);
});

// Start the server
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server is running on http://localhost:${PORT}`);
});