App - Fiber

Static
Use the Static method to serve static files such as images, CSS, and JavaScript.
By default, Static will serve index.html files in response to a request on a directory.
Signature
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func (app *App) Static(prefix, root string, config ...Static) Router
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Use the following code to serve files in a directory named ./public
Example
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app.Static("/", "./public")
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​
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// => http://localhost:3000/hello.html
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// => http://localhost:3000/js/jquery.js
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// => http://localhost:3000/css/style.css
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Example
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// Serve files from multiple directories
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app.Static("/", "./public")
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​
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// Serve files from "./files" directory:
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app.Static("/", "./files")
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You can use any virtual path prefix (where the path does not actually exist in the file system) for files that are served by the Static method, specify a prefix path for the static directory, as shown below:
Example
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app.Static("/static", "./public")
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​
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// => http://localhost:3000/static/hello.html
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// => http://localhost:3000/static/js/jquery.js
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// => http://localhost:3000/static/css/style.css
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If you want to have a little bit more control regarding the settings for serving static files. You could use the fiber.Static struct to enable specific settings.
fiber.Static{}
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// Static defines configuration options when defining static assets.
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type Static struct {
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    // When set to true, the server tries minimizing CPU usage by caching compressed files.
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    // This works differently than the github.com/gofiber/compression middleware.
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    // Optional. Default value false
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    Compress bool `json:"compress"`
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​
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    // When set to true, enables byte range requests.
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    // Optional. Default value false
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    ByteRange bool `json:"byte_range"`
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​
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    // When set to true, enables directory browsing.
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    // Optional. Default value false.
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    Browse bool `json:"browse"`
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​
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    // The name of the index file for serving a directory.
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    // Optional. Default value "index.html".
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    Index string `json:"index"`
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​
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    // Expiration duration for inactive file handlers.
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    // Use a negative time.Duration to disable it.
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    //
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    // Optional. Default value 10 * time.Second.
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    CacheDuration time.Duration `json:"cache_duration"`
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​
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    // The value for the Cache-Control HTTP-header
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    // that is set on the file response. MaxAge is defined in seconds.
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    //
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    // Optional. Default value 0.
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    MaxAge int `json:"max_age"`
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​
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    // Next defines a function to skip this middleware when returned true.
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    //
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    // Optional. Default: nil
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    Next func(c *Ctx) bool
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}
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Example
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// Custom config
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app.Static("/", "./public", fiber.Static{
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  Compress:      true,
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  ByteRange:     true,
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  Browse:        true,
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  Index:         "john.html"
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  CacheDuration: 10 * time.Second,
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  MaxAge:        3600,
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})
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Route Handlers
Registeres a route bound to a specific HTTP method.
Signatures
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// HTTP methods
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func (app *App) Get(path string, handlers ...Handler) Router
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func (app *App) Head(path string, handlers ...Handler) Router
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func (app *App) Post(path string, handlers ...Handler) Router
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func (app *App) Put(path string, handlers ...Handler) Router
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func (app *App) Delete(path string, handlers ...Handler) Router
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func (app *App) Connect(path string, handlers ...Handler) Router
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func (app *App) Options(path string, handlers ...Handler) Router
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func (app *App) Trace(path string, handlers ...Handler) Router
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func (app *App) Patch(path string, handlers ...Handler) Router
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​
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// Add allows you to specifiy a method as value
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func (app *App) Add(method, path string, handlers ...Handler) Router
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​
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// All will register the route on all HTTP methods
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// Almost the same as app.Use but not bound to prefixes
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func (app *App) All(path string, handlers ...Handler) Router
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Example
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// Simple GET handler
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app.Get("/api/list", func(c *fiber.Ctx)error{
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  return c.SendString("I'm a GET request!")
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})
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​
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// Simple POST handler
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app.Post("/api/register", func(c *fiber.Ctx) error {
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  return c.SendString("I'm a POST request!")
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})
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Use can be used for middleware packages and prefix catchers. These routes will only match the beginning of each path i.e. /john will match /john/doe, /johnnnnn etc
Signatures
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func (app *App) Use(args ...interface{}) Router
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Example
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// Match any request
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app.Use(func(c *fiber.Ctx) error {
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    return c.Next()
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})
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​
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// Match request starting with /api
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app.Use("/api", func(c *fiber.Ctx) error {
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    return c.Next()
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})
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​
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// Attach multiple handlers 
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app.Use("/api",func(c *fiber.Ctx) error {
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  c.Set("X-Custom-Header", random.String(32))
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    return c.Next()
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}, func(c *fiber.Ctx) error {
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    return c.Next()
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})
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Mount
You can Mount Fiber instance by creating a *Mount
Signature
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func (a *App) Mount(prefix string, app *App) Router
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Example
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func main() {
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    micro := fiber.New()
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    micro.Get("/doe", func(c *fiber.Ctx) error {
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        return c.SendStatus(fiber.StatusOK)
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    })
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​
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    app := fiber.New()
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    app.Mount("/john", micro) // GET /john/doe -> 200 OK
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​
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    log.Fatal(app.Listen(":3000"))
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}
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Group
You can group routes by creating a *Group struct.
Signature
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func (app *App) Group(prefix string, handlers ...Handler) Router
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Example
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func main() {
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  app := fiber.New()
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​
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  api := app.Group("/api", handler)  // /api
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​
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  v1 := api.Group("/v1", handler)   // /api/v1
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  v1.Get("/list", handler)          // /api/v1/list
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  v1.Get("/user", handler)          // /api/v1/user
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​
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  v2 := api.Group("/v2", handler)   // /api/v2
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  v2.Get("/list", handler)          // /api/v2/list
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  v2.Get("/user", handler)          // /api/v2/user
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​
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  log.Fatal(app.Listen(":3000"))
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}
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Server
Server returns the underlying fasthttp server​
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func (app *App) Server() *fasthttp.Server
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func main() {
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    app := fiber.New()
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​
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    app.Server().MaxConnsPerIP = 1
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​
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    // ...
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}
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Stack
This method returns the original router stack
Signature
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func (app *App) Stack() [][]*Route
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Example
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var handler = func(c *fiber.Ctx) error { return nil }
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​
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func main() {
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    app := fiber.New()
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​
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    app.Get("/john/:age", handler)
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    app.Post("/register", handler)
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​
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    data, _ := json.MarshalIndent(app.Stack(), "", "  ")
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    fmt.Println(string(data))
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​
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    app.Listen(":3000")
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}
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Result
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[
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  [
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    {
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      "method": "GET",
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      "path": "/john/:age",
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      "params": [
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        "age"
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      ]
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    }
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  ],
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  [
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    {
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      "method": "HEAD",
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      "path": "/john/:age",
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      "params": [
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        "age"
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      ]
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    }
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  ],
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  [
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    {
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      "method": "POST",
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      "path": "/register",
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      "params": null
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    }
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  ]
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]
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Config
Config returns the app config as value ( read-only ).
Signature
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func (app *App) Config() Config
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Handler
Handler returns the server handler that can be used to serve custom *fasthttp.RequestCtx requests.
Signature
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func (app *App) Handler() fasthttp.RequestHandler
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Listen
Listen serves HTTP requests from the given address.
Signature
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func (app *App) Listen(addr string) error
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Examples
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// Listen on port :8080 
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app.Listen(":8080")
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​
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// Custom host
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app.Listen("127.0.0.1:8080")
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ListenTLS
ListenTLS serves HTTPs requests from the given address using certFile and keyFile paths to as TLS certificate and key file.
Signature
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func (app *App) ListenTLS(addr, certFile, keyFile string) error
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Examples
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app.ListenTLS(":443", "./cert.pem", "./cert.key");
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Using ListenTLS defaults to the following config ( use Listener to provide your own config )
Default *tls.Config
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&tls.Config{
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    MinVersion:               tls.VersionTLS12,
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    PreferServerCipherSuites: true,
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    Certificates: []tls.Certificate{
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        cert,
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    },
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}
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Listener
You can pass your own net.Listener using the Listener method. This method can be used to enable TLS/HTTPS with a custom tls.Config.
Signature
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func (app *App) Listener(ln net.Listener) error
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Example
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ln, _ := net.Listen("tcp", ":3000")
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​
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cer, _:= tls.LoadX509KeyPair("server.crt", "server.key")
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​
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ln = tls.NewListener(ln, &tls.Config{Certificates: []tls.Certificate{cer}})
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​
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app.Listener(ln)
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Test
Testing your application is done with the Test method. Use this method for creating _test.go files or when you need to debug your routing logic. The default timeout is 1s if you want to disable a timeout altogether, pass -1 as a second argument.
Signature
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func (app *App) Test(req *http.Request, msTimeout ...int) (*http.Response, error)
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Example
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// Create route with GET method for test:
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app.Get("/", func(c *fiber.Ctx) error {
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  fmt.Println(c.BaseURL())              // => http://google.com
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  fmt.Println(c.Get("X-Custom-Header")) // => hi
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​
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  return c.SendString("hello, World!")
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})
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​
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// http.Request
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req := httptest.NewRequest("GET", "http://google.com", nil)
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req.Header.Set("X-Custom-Header", "hi")
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​
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// http.Response
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resp, _ := app.Test(req)
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​
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// Do something with results:
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if resp.StatusCode == fiber.StatusOK {
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  body, _ := ioutil.ReadAll(resp.Body)
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  fmt.Println(string(body)) // => Hello, World!
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}
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