/**
* Error Handler Middleware
* Global error handler for Express - must be registered last
*/
import { Request, Response, NextFunction } from 'express';
/**
* Global error handler
* Catches any errors that weren't handled by route handlers
*/
export function errorHandler(
err: Error,
req: Request,
res: Response,
next: NextFunction
) {
// Log the error for debugging
console.error('Express error handler caught:', {
error: err.message,
stack: err.stack,
path: req.path,
method: req.method,
ip: req.ip
});
// Don't send response if headers already sent
if (res.headersSent) {
return next(err);
}
// Determine status code
let statusCode = 500;
let errorCode = -32603; // JSON-RPC internal error
// Handle specific error types
if (err.name === 'UnauthorizedError') {
statusCode = 401;
errorCode = -32600;
} else if (err.name === 'ValidationError') {
statusCode = 400;
errorCode = -32602;
} else if (err.message.includes('CORS')) {
statusCode = 403;
errorCode = -32600;
}
// Send JSON-RPC formatted error response
res.status(statusCode).json({
jsonrpc: '2.0',
error: {
code: errorCode,
message: process.env.NODE_ENV === 'production'
? 'Internal server error'
: err.message,
data: process.env.NODE_ENV === 'development' ? {
stack: err.stack,
path: req.path
} : undefined
}
});
}
/**
* 404 Not Found handler
* Should be registered before the error handler
*/
export function notFoundHandler(req: Request, res: Response) {
res.status(404).json({
jsonrpc: '2.0',
error: {
code: -32601,
message: `Method not found: ${req.method} ${req.path}`
}
});
}
