server.js

const express = require("express");
const axios = require("axios");
const app = express();
const port = process.env.PORT || 3000;

app.use(express.json());
app.use(express.static("src"));

app.get("/", (req, res) => {
    res.sendFile(__dirname + "/src/index.html");
});

app.post("/api/ping", async (req, res) => {
    const url = req.body?.url;
    const method = req.body?.method;
    const headers = req.body?.headers;
    const body = req.body?.body;

    if (!url) {
        return res.json({ error: true, message: "URL is required to perform a request." });
    }

    const startTime = Date.now();

    try {
        const response = await axios({
            method,
            url,
            headers,
            data: body,
        });

        const time = Date.now() - startTime;
        const size = JSON.stringify(response.data)?.length || 0;

        res.json({
            status: response.status,
            statusText: response.statusText,
            data: response.data,
            headers: response.headers,
            reqHeaders: response.config.headers,
            time,
            size
        });
    } catch (error) {
        const time = Date.now() - startTime;
        if (error.response) {
            const size = JSON.stringify(error.response.data)?.length || 0;
            // Axios throws an error for status codes like 404 or 500. We still want to return the response to the frontend.
            res.json({
                status: error.response.status,
                statusText: error.response.statusText,
                data: error.response.data,
                headers: error.response.headers,
                reqHeaders: error.response.config?.headers || error.config?.headers,
                time,
                size
            });
        } else {
            // Network errors or invalid URLs
            res.json({ 
                error: true, 
                message: error.message,
                reqHeaders: error.config?.headers
            });
        }
    }
});

app.listen(port, () => {
    console.log(`PingPoint is running on http://localhost:${port}`);
});