fastest-expressjs-validator
v1.0.3
Published
fastest-expressjs-validator is a robust and easy-to-use middleware package for Express.js applications that simplifies request validation. With this package, you can effortlessly define validation schemas for request body, URL parameters, and query parame
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fastest-expressjs-validator 🚀
🚀 Effortless Request Validation for Express.js
- fastest-expressjs-validator 🚀
Description
fastest-expressjs-validator
simplifies request validation in Express.js applications. Define schemas for request bodies, URL parameters, and query parameters with ease. Improve the reliability and security of your Express API effortlessly. It leverages the power of the fastest-validator
library to validate incoming requests efficiently.
Features
✅ Define validation schemas for body, params, and queries.
✅ Enhanced security and reliability for your Express API.
✅ Customizable validation options.
✅ Support for asynchronous and synchronous validation.
✅ Detailed error messages and structured responses for validation errors.
✅ High performance with minimal code usage.
✅ Written in TypeScript for enhanced type safety and developer experience.
Installation
You can install fastest-expressjs-validator
using bun or npm or yarn:
Using bun:
bun add fastest-expressjs-validator
Using npm:
npm install fastest-expressjs-validator
Using yarn:
yarn add fastest-expressjs-validator
Functions and Arguments
validateRequest
A middleware function for request validation in Express.js.
- Arguments:
schema: SchemaType
: The validation schema for the request.validateOptions: ValidateOptions = body
The type of request ("body", "params", "query", "headers") to validate (default is "body").validatorOptions: ValidatorOptions = { haltOnFirstError: true }
: Custom validation options (default options include halting on the first error).
Request Validation Options
When using this middleware, you have the flexibility to specify the type of request you want to validate (e.g., "body," "params," "query," or "headers"). Here are the objects for validateOptions
:
Query Validation
const query = {
requestType: "query",
multiRequest: false,
};
Params Validation
const params = {
requestType: "params",
multiRequest: false,
};
Body Validation
const body = {
requestType: "body",
multiRequest: false,
};
Headers Validation
const headers = {
requestType: "headers",
multiRequest: false,
};
validateMultiRequest
A utility function for validating multiple request types.
- Arguments:
schema: SchemaType
: The validation schema for the request.validateOptions
: is not required! Automatically detects default options.validatorOptions: ValidatorOptions = {}
: Custom validation options.
type SchemaType = ValidationSchema | MultiValidationSchema;
Usage
Importing the package
const {
validateRequest,
validateMultiRequest,
query,
} = require("fastest-expressjs-validator");
// or
import {
validateRequest,
validateMultiRequest,
query,
} from "fastest-expressjs-validator";
Middleware for Single Request Type
// Define a validation schema
const schema = {
username: "string",
password: "string",
};
// Use the middleware in your Express route
app.post("/login", validateRequest(schema), (req, res) => {
// Your route logic here
});
OR;
const qSchema = {
q: "string",
};
const validateQuery = validateRequest(qSchema, query);
app.get("/", validateQuery, (req, res) => {
// ... your code here
});
Middleware for Multiple Request Types
// Define a validation schema
const multiSchema = {
body: {
username: "string",
password: "string",
},
params: {
id: "number",
},
};
// Use the middleware in your Express route
app.put("/user/:id", validateMultiRequest(multiSchema), (req, res) => {
// Your route logic here
});
More code examples
validationMiddleware.ts
import {
MultiValidationSchema,
ValidationSchema,
validateMultiRequest,
validateRequest,
query,
params,
} from "fastest-expressjs-validator";
const querySchema: ValidationSchema = {
name: "string",
$$strict: true,
};
const bodySchema: ValidationSchema = {
userName: "string",
password: "string",
email: "email",
$$strict: true,
};
const paramsSchema: ValidationSchema = {
id: "string",
$$strict: true,
};
const multiSchema: MultiValidationSchema = {
body: {
userName: "string",
password: "string",
email: "email",
$$strict: true,
},
query: {
randomStr: "string",
$$strict: true,
},
};
const headerParamSchema: MultiValidationSchema = {
headers: {
hasauth: "string",
},
params: {
id: "string",
},
};
export const validateQuery = validateRequest(querySchema, query);
export const validateBody = validateRequest(bodySchema);
export const validateParams = validateRequest(paramsSchema, params);
export const validateMultiReq = validateMultiRequest(multiSchema);
export const validateHeaderParams = validateMultiRequest(headerParamSchema);
app.ts
import crypto from "node:crypto";
import express from "express";
import {
validateBody,
validateHeaderParams,
validateMultiReq,
validateParams,
validateQuery,
} from "./validationMiddleware";
const app = express();
app.disable("x-powered-by");
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
const hashPassword = (password: string) => {
const salt = crypto.randomBytes(16).toString("hex");
return crypto.pbkdf2Sync(password, salt, 1000, 64, "sha512").toString("hex");
};
app.get("/", validateQuery, (req, res) => {
const { name } = req.query;
res.status(200).json({
message: `Validation working! From ${name}`,
});
});
app.post("/login", validateBody, (req, res) => {
const { userName, password, email } = req.body;
const hashedPassword = hashPassword(password);
res.status(200).json({
userName,
email,
password: hashedPassword,
});
});
app.get("/getUser/:id", validateParams, (req, res) => {
const { id } = req.params;
res.status(200).json({
message: `User found! : ${id}`,
});
});
app.post("/signup", validateMultiReq, (req, res) => {
const { userName, password, email } = req.body;
const { randomStr } = req.query;
const hashedPassword = hashPassword(password);
res.status(201).json({
userName,
email,
randomStr,
password: hashedPassword,
});
});
app.post("/headers/:id", validateHeaderParams, (req, res) => {
const { hasauth } = req.headers;
const { id } = req.params;
res.status(200).json({ hasauth, id });
});
app.listen(3001, () =>
console.log(`App is listening on http://localhost:3001`)
);
See More About Schemas and All Details
For more details on Documentation.
License
This package is open-source and available under the MIT License.