Express AI Error Handler

Overview

Express AI Error Handler is an Express middleware that intelligently handles API errors by providing AI-generated suggestions using Google Generative AI. This package helps developers troubleshoot API errors by offering guidance on the correct request format.

Features

• AI-powered error handling for Express applications
• Auto-suggestions for API request formatting
• Supports multiple API keys with automatic failover
• Configurable logging with Winston
• Customizable AI model and response settings

Installation

Install via npm:

npm i express-ai-error-handler

Usage

Import and integrate AI Error Handler in your Express application:

import express from 'express'
import AIErrorHandler from 'express-ai-error-handler'

const app = express()
const errorHandler = new AIErrorHandler(['your-api-key'], {
	defaultMessage: 'Something went wrong. Please try again.',
	model: 'gemini-1.5-flash',
	maxTokens: 100,
	disableLogging: false,
})

app.use(errorHandler.middleware())

app.listen(3000, () => console.log('Server running on port 3000'))

API

new AIErrorHandler(apiKeys, options)

Creates a new instance of AI Error Handler.

Parameters:

• apiKeys (string[]) – Array of API keys for Google Generative AI (at least one required).
• options (optional object):
  • defaultMessage (string) – Default message if AI fails to generate a response.
  • model (string) – AI model to use (default: gemini-1.5-flash).
  • maxTokens (number) – Maximum token count in AI response (default: 50).
  • disableLogging (boolean) – Disable logging when set to true (default: false).

middleware()

Returns an Express middleware function that handles errors and provides AI-generated suggestions.

generateSmartResponse(errorMessage: string): Promise<string>

Manually generate an AI-powered response for a given error message.

Example:

const errorHandler = new AIErrorHandler(['your-api-key'])
const response = await errorHandler.generateSmartResponse('Invalid API token')
console.log(response)

Logging

By default, errors are logged using Winston. You can disable logging by setting disableLogging: true in options.

License

MIT

Author

Developed by David Patrick BugHunter.dev