Nodejs request for oauth2 token produce error 'socket hang up'

Question

I am currently working on implementing OAuth 2.0 in my React application for user authorization and node js back end for api calling as a proxy server to call auth provider.After a successful login on the authorization server's page,inside the redirect URL specified in my configuration in nodde js  is not generating token and i am getting error socket hang up.Could anyone please help me identify the issue and provide proper guidance on how to resolve it? error happening inside /login

// Function to validate the access token
const validateAccessToken = async (accessToken) => {
	try {
		// Make a request to the authorization server or resource server to validate the token
		const validationResponse = await axios.get(`${config.BASE_URL}${config.INTROSPECTION_URL}`, {
			headers: {
				Authorization: `Bearer ${accessToken}`
			}
		});

		// Check if the validation response indicates that the token is valid
		if (validationResponse.data && validationResponse.data.active === true) {
			return true; // Token is valid
		} else {
			return false; // Token is not valid
		}
	} catch (error) {
		// Handle any errors that occur during the validation process
		console.error('Error validating access token:', error);
		return false; // Assume token is not valid in case of errors
	}
};

// Function to request an access token
const getAccessToken = async (authCode, state) => {
	const accessTokenParams = {
		client_id: config.CLIENT_ID,
		client_secret: config.CLIENT_SECRET,
		code: authCode,
		redirect_uri: config.REDIRECT_URI,
		state,
		grant_type: 'authorization_code'
	};

	try {
		const response = await axios.post(`${config.BASE_URL}${config.TOKEN_URL}`, accessTokenParams);
		return response;
	} catch (error) {
		throw error;
	}
};

// Route to handle the redirect URL after authentication
app.get('/login', async (req, res) => {
	logger.info('Inside redirect URL /login');
	const state = req.query.state;
	const code = req.query.code;

	try {
		// Request an access token using the authorization code
		const accessTokenResponse = await getAccessToken(code, state);

		if (accessTokenResponse.data.access_token) {
			const isAccessTokenValid = await validateAccessToken(accessTokenResponse.data.access_token);

			if (isAccessTokenValid) {
				req.session.token = accessTokenResponse.data.access_token;

				// Redirect to /dashboard after successful login
				res.redirect('/dashboard');
			} else {
				res.status(401).send('Unauthorized');
			}
		} else {
			res.status(401).send('Unauthorized');
		}
	} catch (error) {
		logger.error('Error during login:', error);
		res.status(500).send(error.message);
	}
});

JavaScript

Copy

Answer 1

1. Redirect uri-REDIRECT_URI = http://127.0.0.1:55555/login to https I cannot change from my side

2.I have added and configured and enable HTTPS but what happens is there is a mismatch in

https://127.0.0.1:${port} + REDIRECT_URI = http://127.0.0.1:55555/login as i have to pass redirect uri to token generation

This is the challenge i am facing

Answer 2

If you're trying to resolve the issue by configuring your Node.js server to use HTTPS and adding certificates, you can follow these steps to update the REDIRECT_URI to use HTTPS:

1. Generate SSL/TLS Certificates:

   First, you need to generate SSL/TLS certificates for your Node.js server. You can use tools like OpenSSL to generate self-signed certificates for development purposes. Here's an example of how to generate a self-signed certificate:

openssl req -nodes -new -x509 -keyout server.key -out server.cert

 

This command will generate server.key (the private key) and server.cert (the certificate file).

2.  Node.js Server Configuration:

Update your Node.js server code to use the generated certificates and enable HTTPS. You can use the https module in Node.js to do this. Here's an example:

const https = require('https');
const fs = require('fs');
const express = require('express');
const app = express();

const privateKey = fs.readFileSync('server.key', 'utf8');
const certificate = fs.readFileSync('server.cert', 'utf8');
const credentials = { key: privateKey, cert: certificate };

const port = 55555;

const server = https.createServer(credentials, app);

// Configure your routes and middleware here

server.listen(port, () => {
    console.log(`Server is running on https://127.0.0.1:${port}`);
});

 

This code sets up an HTTPS server using the generated SSL/TLS certificates.

3. Update REDIRECT_URI:

Now that your Node.js server is running on HTTPS, you can update the REDIRECT_URI to use HTTPS. Update your React application's configuration:

 

REACT_APP_SERVER_URL = "https://127.0.0.1:55555"
REDIRECT_URI = "https://127.0.0.1:55555/login"

 

Ensure that your OAuth 2.0 configuration (e.g., in the authorization server) also reflects the updated REDIRECT_URI with HTTPS.

 

4. Update the Authorization Server:

If you're using an external authorization server (e.g., OAuth provider), you may need to configure it to allow HTTPS redirect URIs. Make sure to update the authorization server settings to accept and handle HTTPS callback URLs.

5.Trust the Self-Signed Certificate (For Development):

Browsers often don't trust self-signed certificates by default. During development, you can configure your browser to trust the certificate you generated. Import the server.cert file into your browser's certificate store.

Now, with your Node.js server using HTTPS and the REDIRECT_URI configured for HTTPS, your OAuth 2.0 authorization flow should work smoothly without encountering the "socket hang up" error. Make sure to test your application thoroughly in your development environment before deploying it to production.

Answer 3

"What could be the reason for encountering a 'Socket Hang Up' error when dealing with OAuth 2.0 Redirect URL Issue in a React App and Node.js Backend, despite successfully receiving a response in Postman, especially when using Node.js POST method?"

In my React application for user authorization, with a Node.js backend serving as a proxy server for API calls to the authentication provider. However, after a successful login on the authorization server's page, the redirect URL specified in my Node.js configuration isn't generating a token, and I'm encountering a "socket hang up" error.

I've tried to address this issue by configuring my Node.js server to use HTTPS and adding certificates. Here's my configuration:

REACT_APP_SERVER_URL = "https://127.0.0.1:55555"
REDIRECT_URI = "http://127.0.0.1:55555/login"

In the documentation for my OIDC authorization code flow, I've come across the requirement that "The Client must validate the server’s identity based on the server's TLS certificate." I am following this recommendation, but the issue persists.

I cant change REDIRECT_URI to use HTTPS manually by using "https://127.0.0.1:55555/login"
how to resolve this issue 

 

Answer 4

If you're encountering the "socket hang up" error specifically when making the axios.post request in the getAccessToken function, and you've already checked and confirmed the configuration and network issues, there are a few more steps you can take to troubleshoot the problem:

1. Retry Mechanism: Implement a retry mechanism for the axios.post request to handle transient network issues. This can be done using a library like axios-retry. Here's an example of how you can use it:

Install axios-retry if you haven't already:

npm install axios-retry

Modify your code to include retries:

const axios = require('axios');
const axiosRetry = require('axios-retry');

// Set up axios with retry
axiosRetry(axios, { retries: 3 }); // You can adjust the number of retries

// ...

const getAccessToken = async (authCode, state) => {
    const accessTokenParams = {
        client_id: config.CLIENT_ID,
        client_secret: config.CLIENT_SECRET,
        code: authCode,
        redirect_uri: config.REDIRECT_URI,
        state,
        grant_type: 'authorization_code'
    };

    try {
        const response = await axios.post(`${config.BASE_URL}${config.TOKEN_URL}`, accessTokenParams);
        console.log('response', response);
        return response;
    } catch (error) {
        throw error;
    }
};

Implementing retries can help in cases where the "socket hang up" error is due to transient network issues.

2. TLS Version: Ensure that your Node.js version supports the TLS (Transport Layer Security) version used by the authorization server. Some servers may require specific TLS versions. You can try updating your Node.js version to a more recent one that supports the required TLS versions.

3. Proxy Server Configuration: If you're behind a corporate firewall or using a proxy server, make sure your Node.js server is configured to work with the proxy server correctly. You may need to set environment variables or configure Axios to use the proxy server.

4. Authorization Server Logs: Check the logs or error messages on the authorization server side. The "socket hang up" error might be originating from the server, and there could be specific details in the server logs that can help diagnose the issue.

5. TLS Inspection: Some corporate networks perform TLS inspection, which can interfere with HTTPS requests. If you're in a corporate environment, check if there is any TLS inspection or interception in place that might be causing issues.

6. Firewall and Security Software: Verify that there are no firewall rules or security software on the server where your Node.js application is running that could be blocking outgoing requests.

7. Authorization Server Status: Ensure that the authorization server itself is operational and not experiencing any downtime or issues.

8. Check for Updates: Keep your Node.js environment and Axios library up to date. Sometimes, issues related to network connections are resolved in newer versions.

If none of these steps resolve the issue, you may need to contact the support team of the authorization server for further assistance, as the problem might be specific to their server configuration or policies.

Answer 5

i have checked all the points below but still i am getting same error.and error when i do post methode in below code

 

const getAccessToken = async (authCode, state) => {
	const accessTokenParams = {
		client_id: config.CLIENT_ID,
		client_secret: config.CLIENT_SECRET,
		code: authCode,
		redirect_uri: config.REDIRECT_URI,
		state,
		grant_type: 'authorization_code'
	};

	try {
		//error when below post methode executing
		const response = await axios.post(`${config.BASE_URL}${config.TOKEN_URL}`, accessTokenParams);
		console.log('response', response);
		return response;
	} catch (error) {
		throw error;
	}
};

Answer 6

The "socket hang up" error typically occurs when there is an issue with the HTTP request being made. In your code, you are making HTTP requests to the authorization server and the resource server using the Axios library. Here are some steps you can take to identify and resolve the issue:

1. Check Configuration:

   Ensure that your config object contains the correct values for BASE_URL, INTROSPECTION_URL, CLIENT_ID, CLIENT_SECRET, REDIRECT_URI, and TOKEN_URL. Double-check that these URLs and credentials are accurate and match the configuration on the authorization server.

2. Network Connectivity:

   Make sure that your Node.js application has network connectivity to reach the authorization server. Check if your Node.js server can access external resources.

3. Authorization Code Flow:

   Confirm that you are using the correct OAuth 2.0 authorization code flow. In this flow, the user is redirected to the authorization server for login and authorization. After successful login, the authorization server redirects the user back to your Node.js application with an authorization code, which is then exchanged for an access token.

4. Error Handling:

   The "socket hang up" error may occur due to network issues or problems on the authorization server's end. Make sure you are properly handling errors and timeouts in your Axios requests. You can implement retry mechanisms or implement better error handling to log more details about the error.

5. Logs and Debugging:

   Add more logging statements to your code to get additional information about where the error is occurring. You can log the request details, response, and any errors that are thrown to help diagnose the issue.

Here's an example of how you can add more logging to your code

try {
    const accessTokenResponse = await getAccessToken(code, state);
    console.log('Access Token Response:', accessTokenResponse);

    if (accessTokenResponse.data.access_token) {
        const isAccessTokenValid = await validateAccessToken(accessTokenResponse.data.access_token);
        console.log('Is Access Token Valid:', isAccessTokenValid);

        if (isAccessTokenValid) {
            req.session.token = accessTokenResponse.data.access_token;
            // Redirect to /dashboard after successful login
            res.redirect('/dashboard');
        } else {
            res.status(401).send('Unauthorized');
        }
    } else {
        res.status(401).send('Unauthorized');
    }
} catch (error) {
    console.error('Error during login:', error);
    res.status(500).send(error.message);
}

By adding more logging, you can see the details of the requests and responses, which should help you pinpoint the issue.

1. Proxy Server:

   If your Node.js server is acting as a proxy server, ensure that it is forwarding requests to the authorization server correctly and handling responses appropriately. The "socket hang up" error could be related to how the proxy server is managing connections.

2. Network Security:

   Check if there are any network-level security configurations, firewalls, or proxies that could be affecting your Node.js application's ability to make outbound HTTP requests.

By following these steps and examining the logs and error details, you should be able to identify the root cause of the "socket hang up" error and take appropriate action to resolve it.