How to Solve Cloudflare Challenge with Node.js

npm install axios

const axios = require('axios');

// -------------------PLEASE MODIFY THESE VALUES-------------------
// Your proxy details in the format: http://username:password@ip:port
const PROXY = 'http://username:password@ip:port'; 
// Your API key from the CapSolver Dashboard
const CAPSOLVER_API_KEY = 'YourAPIKEY';
// The URL of the target website where you want to solve the Cloudflare challenge
const PAGE_URL = 'https://www.yourwebsite.com';
// ----------------------------------------------------------------


/**
 * Creates a task to solve the Cloudflare challenge using the CapSolver API.
 * @param {string} websiteURL - The URL of the target website.
 * @param {string} proxy - The proxy to use.
 * @returns {Promise<string|null>} - The task ID, or null if creation fails.
 */
async function createCloudflareTask(websiteURL, proxy) {
    console.log('Creating Cloudflare task for CapSolver...');
    try {
        const response = await axios.post('https://api.capsolver.com/createTask', {
            clientKey: CAPSOLVER_API_KEY,
            task: {
                type: 'AntiCloudflareTask',
                websiteURL: websiteURL,
                proxy: proxy
            }
        });
        if (response.data.errorId > 0) {
            console.error(`Failed to create task: ${response.data.errorDescription}`);
            return null;
        }
        console.log(`Task created successfully. Task ID: ${response.data.taskId}`);
        return response.data.taskId;
    } catch (error) {
        console.error(`An error occurred while creating the task: ${error}`);
        return null;
    }
}

/**
 * Polls for the task result.
 * @param {string} taskId - The task ID returned by CapSolver.
 * @returns {Promise<object|null>} - The solution object, or null if it fails.
 */
async function getTaskResult(taskId) {
    console.log(`Getting result for task ID ${taskId}...`);
    let solution = null;

    while (!solution) {
        await new Promise(resolve => setTimeout(resolve, 3000)); // Wait for 3 seconds

        try {
            const response = await axios.post('https://api.capsolver.com/getTaskResult', {
                clientKey: CAPSOLVER_API_KEY,
                taskId: taskId
            });

            if (response.data.errorId > 0) {
                console.error(`Failed to get result: ${response.data.errorDescription}`);
                return null;
            }

            if (response.data.status === 'ready') {
                console.log('Solution retrieved successfully!');
                solution = response.data.solution;
            } else if (response.data.status === 'processing') {
                console.log('Task is still processing, please wait...');
            } else if (response.data.status === 'failed') {
                console.error(`Task processing failed: ${response.data.errorDescription}`);
                return null;
            }
        } catch (error) {
            console.error(`An error occurred while getting the result: ${error}`);
            return null;
        }
    }
    return solution;
}

/**
 * Main function to execute the entire process.
 */
async function main() {
    console.log('Starting to solve Cloudflare challenge...');
    
    const taskId = await createCloudflareTask(PAGE_URL, PROXY);
    if (!taskId) {
        console.log('Could not create task, exiting.');
        return;
    }

    const solution = await getTaskResult(taskId);
    if (!solution) {
        console.log('Could not retrieve solution, exiting.');
        return;
    }

    console.log('Solution details obtained:');
    console.log(solution);

    // You can now use the obtained cookies and user-agent to access the target website.
    // The solution object contains 'url', 'status', 'headers', 'cookies', 'userAgent'.
    
    // Example: How to use the obtained cookies and user-agent to make a request
    try {
        const cfCookie = solution.cookies.map(cookie => `${cookie.name}=${cookie.value}`).join('; ');
        
        console.log('\nAccessing the target page with the obtained cookies and user-agent...');
        const pageResponse = await axios.get(PAGE_URL, {
            headers: {
                'User-Agent': solution.userAgent,
                'Cookie': cfCookie
            },
            // It's recommended to use a dedicated proxy-enabled axios instance for subsequent requests.
            proxy: false, 
        });

        console.log(`\nSuccessfully accessed! Page status code: ${pageResponse.status}`);
        // console.log('Page content:', pageResponse.data); // Uncomment to see the page content

    } catch (error) {
        console.error(`\nError accessing page with solution: ${error.response ? error.response.status : error.message}`);
    }
}

main();