How to solve AWS Captcha with NodeJS

npm install axios cheerio

const axios = require('axios');
const cheerio = require('cheerio');
const { URL } = require('url');

// ⚠️ Configuration: Please replace with your actual values
const CLIENT_KEY = "YOUR_CAPSOLVER_API_KEY"; // Replace with your CapSolver API Key
const PAGE_URL = "https://norway-meetup.aws.wslab.no/"; // Replace with the target website URL
const PROXY = "YOUR_PROXY_ADDRESS"; // Replace with your proxy address (Format: user:pass@ip:port or ip:port)

// --- Helper Functions ---

/**
 * Pauses execution for a specified number of milliseconds
 * @param {number} ms Milliseconds
 */
function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

/**
 * Creates a task with CapSolver
 * @param {object} payload Task payload
 * @returns {Promise<object>} Task creation result
 */
async function createTask(payload) {
    try {
        const res = await axios.post('https://api.capsolver.com/createTask', {
            clientKey: CLIENT_KEY,
            task: payload
        });
        if (res.data.errorId !== 0) {
            throw new Error(`CapSolver API Error: ${res.data.errorDescription}`);
        }
        return res.data;
    } catch (error) {
        console.error("Failed to create CapSolver task:", error.message);
        return null;
    }
}

/**
 * Gets the CapSolver task result until the task is completed
 * @param {string} taskId Task ID
 * @returns {Promise<object>} Task result
 */
async function getTaskResult(taskId) {
    if (!taskId) return null;
    console.log(`Waiting for task result (ID: ${taskId})...`);
    try {
        let success = false;
        let result = null;
        while (!success) {
            await sleep(3000); // Query every 3 seconds
            const res = await axios.post('https://api.capsolver.com/getTaskResult', {
                clientKey: CLIENT_KEY,
                taskId: taskId
            });

            if (res.data.errorId !== 0) {
                throw new Error(`CapSolver API Error: ${res.data.errorDescription}`);
            }

            if (res.data.status === "ready") {
                success = true;
                result = res.data;
                console.log("Task completed, solution obtained.");
            } else if (res.data.status === "processing") {
                console.log("Task is still processing...");
            }
        }
        return result;
    } catch (error) {
        console.error("Failed to get CapSolver task result:", error.message);
        return null;
    }
}

// --- Core Solver Functions ---

/**
 * Solves AWS WAF Challenge (Status Code 202)
 * @param {string} awsChallengeJS AWS Challenge JavaScript URL
 * @returns {Promise<string|null>} Solved AWS WAF Cookie value
 */
async function solveAwsChallenge(awsChallengeJS) {
    console.log("AWS WAF Challenge detected (Status Code 202), starting to solve...");
    const taskPayload = {
        type: "AntiAwsWafTask",
        websiteURL: PAGE_URL,
        awsChallengeJS,
        proxy: PROXY
    };
    const taskData = await createTask(taskPayload);
    if (!taskData) return null;

    const result = await getTaskResult(taskData.taskId);
    if (result && result.solution && result.solution.cookie) {
        return result.solution.cookie;
    }
    return null;
}

/**
 * Solves AWS WAF Captcha + Challenge (Status Code 405)
 * @param {string} htmlContent HTML content containing Captcha parameters
 * @param {string} awsChallengeJS AWS Challenge JavaScript URL
 * @returns {Promise<string|null>} Solved AWS WAF Cookie value
 */
async function solveAwsCaptchaChallenge(htmlContent, awsChallengeJS) {
    console.log("AWS WAF Captcha detected (Status Code 405), starting to solve...");
    const $ = cheerio.load(htmlContent);
    const scriptContent = $("script[type='text/javascript']").last().html();

    if (!scriptContent) {
        console.error("Could not find the script content containing Captcha parameters.");
        return null;
    }

    // Use regular expressions to extract key parameters
    const keyMatch = /"key":"(.*?)"/.exec(scriptContent);
    const ivMatch = /"iv":"(.*?)"/.exec(scriptContent);
    const contextMatch = /"context":"(.*?)"/.exec(scriptContent);

    const key = keyMatch ? keyMatch[1] : null;
    const iv = ivMatch ? ivMatch[1] : null;
    const context = contextMatch ? contextMatch[1] : null;

    if (!key || !iv || !context) {
        console.error("Failed to extract all required Captcha parameters (key, iv, context) from the script.");
        return null;
    }

    console.log(`Extracted Parameters: Key=${key}, IV=${iv}, Context=${context}`);

    const taskPayload = {
        type: "AntiAwsWafTask", // CapSolver uses this task type uniformly
        websiteURL: PAGE_URL,
        awsKey: key,
        awsIv: iv,
        awsContext: context,
        awsChallengeJS,
        proxy: PROXY
    };

    const taskData = await createTask(taskPayload);
    if (!taskData) return null;

    const result = await getTaskResult(taskData.taskId);
    if (result && result.solution && result.solution.cookie) {
        return result.solution.cookie;
    }
    return null;
}

/**
 * Main execution function
 */
async function main() {
    let awsWafCookie = null;
    let initialResponse = null;

    // 1. Initial request to the target page
    try {
        console.log(`Requesting target page: ${PAGE_URL}`);
        initialResponse = await axios.get(PAGE_URL, {
            headers: {
                // Simulate browser request headers
                "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36",
                "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
                "Accept-Encoding": "gzip, deflate, br",
                "Accept-Language": "en-US,en;q=0.9",
                "Cache-Control": "max-age=0",
                "Upgrade-Insecure-Requests": "1"
            },
            // Allow processing 2xx, 3xx, 4xx status codes
            validateStatus: (status) => status >= 200 && status < 500
        });
        console.log(`Initial response status code: ${initialResponse.status}`);
    } catch (error) {
        console.error(`Initial request failed: ${error.message}`);
        return;
    }

    const $ = cheerio.load(initialResponse.data);
    const scriptTags = $('script[src*="token.awswaf.com"]');
    const awsChallengeJS = scriptTags.attr('src');

    if (!awsChallengeJS) {
        console.log("AWS WAF challenge script not detected. The website may not be protected or has already passed.");
        // If no challenge script, use the initial response directly
        if (initialResponse.status === 200) {
            console.log("Website loaded successfully.");
            // console.log(initialResponse.data); // Print final content
            return;
        }
    } else {
        console.log(`AWS WAF challenge script URL detected: ${awsChallengeJS}`);
    }


    // 2. Determine and solve the challenge/captcha based on the status code
    if (initialResponse.status === 202) {
        // AWS WAF Challenge only
        awsWafCookie = await solveAwsChallenge(awsChallengeJS);
    } else if (initialResponse.status === 405) {
        // AWS WAF Captcha + Challenge
        awsWafCookie = await solveAwsCaptchaChallenge(initialResponse.data, awsChallengeJS);
    } else if (initialResponse.status === 200) {
        console.log("Website loaded successfully, no captcha solving required.");
        // console.log(initialResponse.data); // Print final content
        return;
    } else {
        console.log(`Encountered unhandled status code: ${initialResponse.status}.`);
        return;
    }

    // 3. Request the target page again using the obtained Cookie
    if (awsWafCookie) {
        try {
            console.log("\n--- Second Request: Using AWS WAF Cookie ---");
            console.log(`Cookie used: ${awsWafCookie}`);

            const finalResponse = await axios.get(PAGE_URL, {
                headers: {
                    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36",
                    "Cookie": `aws-waf-token=${awsWafCookie}`
                },
                validateStatus: (status) => status === 200 // Expect final success
            });

            console.log(`Final response status code: ${finalResponse.status}`);
            console.log("Website content retrieved successfully!");
            // console.log(finalResponse.data); // Print final content
        } catch (error) {
            console.error(`Final request failed: ${error.message}`);
        }
    } else {
        console.log("Failed to obtain AWS WAF Cookie, unable to perform the second request.");
    }
}

main();