fiber/middleware/envvar

Exposing Environment Variables Middleware

EnvVar middleware for Fiber that can be used to expose environment variables with various options.

Table of Contents

• Environment Variables (EnvVar) Middleware
  • Table of Contents
  • Signatures
  • Examples
    • Default Config
    • Custom Config
    • Response
  • Config
  • Default Config

Signatures

func New(config ...Config) fiber.Handler

Examples

First import the middleware from Fiber,

import (
  "github.com/gofiber/fiber/v2"
  "github.com/gofiber/fiber/v2/middleware/envvar"
)

Then create a Fiber app with app := fiber.New().

Note: You need to provide a path to use envvar middleware.

Default Config

app.Use("/expose/envvars", envvar.New())

Custom Config

app.Use("/expose/envvars", envvar.New(
	envvar.Config{
		ExportVars:  map[string]string{"testKey": "", "testDefaultKey": "testDefaultVal"},
		ExcludeVars: map[string]string{"excludeKey": ""},
	}),
)

Response

Http response contract:

{
  "vars": {
    "someEnvVariable": "someValue",
    "anotherEnvVariable": "anotherValue"
  }
}

Config

// Config defines the config for middleware.
type Config struct {
	// ExportVars specifies the environment variables that should export
	ExportVars map[string]string
	// ExcludeVars specifies the environment variables that should not export
	ExcludeVars map[string]string
}

Default Config

Config{}