# Compress Middleware

Compression middleware for [Fiber](https://github.com/gofiber/fiber) that will compress the response using `gzip`, `deflate` and `brotli` compression depending on the [Accept-Encoding](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding) header.

- [Compress Middleware](#compress-middleware)
	- [Signatures](#signatures)
	- [Examples](#examples)
		- [Default Config](#default-config)
		- [Custom Config](#custom-config)
	- [Config](#config)
	- [Default Config](#default-config-1)
	- [Constants](#constants)

## Signatures

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

## Examples

First import the middleware from Fiber,

```go
import (
  "github.com/gofiber/fiber/v2"
  "github.com/gofiber/fiber/v2/middleware/compress"
)
```

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

### Default Config

```go
app.Use(compress.New())
```

### Custom Config

```go
// Provide a custom compression level
app.Use(compress.New(compress.Config{
    Level: compress.LevelBestSpeed, // 1
}))

// Skip middleware for specific routes
app.Use(compress.New(compress.Config{
  Next:  func(c *fiber.Ctx) bool {
    return c.Path() == "/dont_compress"
  },
  Level: compress.LevelBestSpeed, // 1
}))
```

## Config

```go
// Config defines the config for middleware.
type Config struct {
	// Next defines a function to skip this middleware when returned true.
	//
	// Optional. Default: nil
	Next func(c *fiber.Ctx) bool

	// CompressLevel determines the compression algoritm
	//
	// Optional. Default: LevelDefault
	// LevelDisabled:         -1
	// LevelDefault:          0
	// LevelBestSpeed:        1
	// LevelBestCompression:  2
	Level int
}
```

## Default Config

```go
var ConfigDefault = Config{
	Next:  nil,
	Level: LevelDefault,
}
```

## Constants

```go
// Compression levels
const (
	LevelDisabled        = -1
	LevelDefault         = 0
	LevelBestSpeed       = 1
	LevelBestCompression = 2
)
```