Express Validation
express-validation is an express middleware that validates a request and returns a response with errors; if any of the configured validation rules fail.
Overview
Express-validation is an express middleware that validates requests and returns responses with errors if any validation rules fail. It utilizes Joi for defining validation rules and currently supports Joi v17.x.x. The middleware supports validating various parameter types including headers, params, query, cookies, signed cookies, and body.
Features
- Validation Middleware: Middleware for validating requests and returning errors if validation fails.
- Support for Joi: Hard dependency on Joi to avoid compatibility issues with different Joi releases.
- Parameter Validation: Supports validating headers, params, query, cookies, signed cookies, and body parameters.
- Custom Error Handling: Allows for setting up an express global error handler to handle validation errors.
- Flexible Error Formats: Options to customize error formats like keyByField for simpler error messages.
- API Exposure: Exposes an API for validating schemas with options and joiOptions.
Summary
Express-validation is a handy express middleware for validating requests by defining rules using Joi. It offers flexible error handling options and supports various parameter types for validation. By utilizing this package, developers can easily implement request validation in their Express applications, ensuring data integrity and security.
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