index.js

const express = require('express');
const request = require('request-promise');

const app = express();
const PORT = process.env.PORT || 4000;

app.use(express.json());

const generateScraperApiUrl = (api_key) => `http://api.scraperapi.com?api_key=${api_key}&autoparse=true`;

app.get('/', (req, res) => {
    res.send('Welcom to Amazon Scraper API.');
});

// Get Product Details
app.get('/products/:productId', async (req, res) => {
    const { productId } = req.params;
    const { api_key } = req.query;

    try {
        const response = await request(`${generateScraperApiUrl(api_key)}&url=https://www.amazon.com/dp/${productId}`);
        res.json(JSON.parse(response));
    } catch {
        res.json(error);
    }
});

// Get Product Reviews

app.get('/products/:productId/reviews', async (req, res) => {
    const { productId } = req.params;
    const { api_key } = req.query;

    try {
        const response = await request(`${generateScraperApiUrl(api_key)}&url=https://www.amazon.com/product-reviews/${productId}`);
        res.json(JSON.parse(response));
    } catch {
        res.json(error);
    }
});

// Get Product Offers

app.get('/products/:productId/offers', async (req, res) => {
    const { productId } = req.params;
    const { api_key } = req.query;

    try {
        const response = await request(`${generateScraperApiUrl(api_key)}&url=https://www.amazon.com/gp/offer-listing/${productId}`);
        res.json(JSON.parse(response));
    } catch {
        res.json(error);
    }
});

// Get Search Result

app.get('/search/:searchQuery', async (req, res) => {
    const { searchQuery } = req.params;
    const { api_key } = req.query;

    try {
        const response = await request(`${generateScraperApiUrl(api_key)}&url=https://www.amazon.com/s?k=${searchQuery}`);
        res.json(JSON.parse(response));
    } catch {
        res.json(error);
    }
});

app.listen(PORT, () => console.log(`Server running on port ${PORT}`));