Convert Axios to cURL

A lightweight TypeScript utility to convert Axios requests and errors into cURL commands for debugging and logging purposes.

Installation

npm install nestjs-convert-to-curl

Features

• 🔄 Convert Axios requests to cURL commands
• 🔒 Anonymize sensitive fields (passwords, tokens, etc.)
• 📝 Support for all HTTP methods (GET, POST, PUT, PATCH, DELETE)
• 🎯 Works with Axios errors and request configs
• 🔍 Query parameters and headers support
• 💾 Request body handling (JSON, strings, buffers)

Usage

Basic Example

import axios from 'axios';
import { AxiosConverter } from 'nestjs-convert-to-curl';

try {
  await axios.post('https://api.example.com/users', {
    name: 'John Doe',
    email: '[email protected]'
  });
} catch (error) {
  console.log(AxiosConverter.getCurl(error));
}

Output:

curl --location -g --request POST 'https://api.example.com/users' --header 'Content-Type: application/json' --data-raw '{"name":"John Doe","email":"[email protected]"}'

Anonymizing Sensitive Fields

Protect sensitive data by anonymizing specific fields in the request body:

import axios from 'axios';
import { AxiosConverter } from 'nestjs-convert-to-curl';

try {
  await axios.post('https://api.example.com/auth', {
    username: 'johndoe',
    password: 'secret123',
    apiKey: 'my-secret-key'
  }, {
    headers: { 
      'Authorization': 'Bearer token123' 
    }
  });
} catch (error) {
  // Anonymize password and apiKey fields
  console.log(AxiosConverter.getCurl(error, ['password', 'apiKey']));
}

Output:

curl --location -g --request POST 'https://api.example.com/auth' --header 'Content-Type: application/json' --header 'Authorization: Bearer token123' --data-raw '{"username":"johndoe","password":"******","apiKey":"******"}'

Nested Fields Anonymization

You can anonymize nested fields using dot notation:

import axios from 'axios';
import { AxiosConverter } from 'nestjs-convert-to-curl';

try {
  await axios.post('https://api.example.com/employees', {
    name: 'Mike',
    credentials: {
      password: '123456',
      ssn: '123-45-6789'
    }
  });
} catch (error) {
  console.log(AxiosConverter.getCurl(error, ['credentials.password', 'credentials.ssn']));
}

Output:

curl --location -g --request POST 'https://api.example.com/employees' --header 'Content-Type: application/json' --data-raw '{"name":"Mike","credentials":{"password":"******","ssn":"******"}}'

Using with Axios Config

You can also pass an Axios config object directly:

import { AxiosConverter } from 'nestjs-convert-to-curl';

const config = {
  method: 'GET',
  url: 'https://api.example.com/users',
  params: { page: 1, limit: 10 },
  headers: { 'Authorization': 'Bearer token' }
};

console.log(AxiosConverter.getCurl(config));

Output:

curl --location -g --request GET 'https://api.example.com/users?page=1&limit=10' --header 'Authorization: Bearer token'

API Reference

AxiosConverter.getCurl(request, anonymizedFields?)

Converts an Axios request or error to a cURL command.

Parameters:

• request (required): Axios error object or request config
• anonymizedFields (optional): Array of field names to anonymize (supports dot notation for nested fields)

Returns: String containing the formatted cURL command

Use Cases

• 🐛 Debugging: Quickly reproduce API calls using cURL
• 📊 Logging: Log failed requests in a readable format
• 🔍 Monitoring: Track API calls for troubleshooting
• 📝 Documentation: Generate cURL examples from your code
• 🧪 Testing: Share reproducible API calls with your team

Contributing

Contributions are welcome! Feel free to submit issues and pull requests.

Contributors

License

This project is licensed under the MIT License.