fiber/docs/middleware/envvar.md

id

id
envvar

EnvVar

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

Signatures

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

Examples

Import the middleware package that is part of the Fiber web framework

import (
    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/middleware/envvar"
)

After you initiate your Fiber app, you can use the following possibilities:

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

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

:::note You will need to provide a path to use the envvar middleware. :::

Response

Http response contract:

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

Config

Property	Type	Description	Default
ExportVars	map[string]string	ExportVars specifies the environment variables that should be exported.	nil
ExcludeVars	map[string]string	ExcludeVars specifies the environment variables that should not be exported.	nil

Default Config

Config{}