Bind Middleware for Fiber

Bind is a request schema validator middleware for the Fiber web framework. It provides a convenient way to parse and validate data from different sources such as the request body, query string parameters, and route parameters.

Installation

Use go get to install the middleware:

go get -u github.com/idan-fishman/fiber-bind

Usage Example

Here are examples of how to use Bind to validate data from the request body and query parameters.

Body Parameters

package main

import (
    "github.com/gofiber/fiber/v2"
    "github.com/idan-fishman/fiber-bind"
)

type Person struct {
    Name string `json:"name" validate:"required"`
    Age  int    `json:"age" validate:"gte=18"`
}

func main() {
    app := fiber.New()

    app.Post("/person", bind.New(bind.Config{
        Validator: validator.New(),
        Source:    bind.JSON,
    }, &Person{}), func(c *fiber.Ctx) error {
        person := c.Locals(bind.JSON).(*Person)
        return c.JSON(person)
    })

    app.Listen(":3000")
}

Query Parameters

package main

import (
    "github.com/gofiber/fiber/v2"
    "github.com/idan-fishman/fiber-bind"
)

type PersonParams struct {
    Name string `json:"name" validate:"required"`
}

func main() {
    app := fiber.New()

    app.Get("/person", bind.New(bind.Config{
        Validator: validator.New(),
        Source:    bind.Query,
    }, &PersonParams{}), func(c *fiber.Ctx) error {
        params := c.Locals(bind.Query).(*PersonParams)
        return c.JSON(params)
    })

    app.Listen(":3000")
}

In these examples, we define a struct that represents the data we want to validate. We then use Bind to validate the data from the request body or query parameters using the New function. We specify the source of the data as bind.Body or bind.Query and provide the struct as the schema to validate against. If the data is valid, it will be available in the context locals for further use.

Configuration

Bind can be configured using the Config struct, which has the following fields:

Next - A function that is called before the middleware is executed. If this function returns true, the middleware is skipped.
Validator - A validator instance to use for validating the data. By default, the middleware uses the go-playground/validator/v10 package.
Source - The source of the data to validate. This can be one of bind.JSON, bind.XML, bind.Form, bind.Query, or bind.Params.
FormFileFields - A map where the key is the name of the file field in the form and the value is the form tag. If a field is specified here, the middleware will check if the file is uploaded in the request.

License

Bind is licensed under the MIT License. See the LICENSE file for details.