AssetRoute: Static file serving

In routr: A Simple Router for HTTP and WebSocket Requests

Static file serving

Description

A class for serving files from the server directly. The AssetRoute is fundamentally different than the other routes provided by routr. It is specific to httpuv and circumvents the standard dispatch entirely (the request never enters the R process). This makes it extremely fast but also somewhat limited as you can't pass the request through any middleware.

Active bindings

at

The url path to serve the assets on

path

The path to the file or directory to serve

use_index

Should an index.html file be served if present when a client requests the folder

fallthrough

Should requests that doesn't match a file enter the request loop or have a 404 response send directly

html_charset

The charset to report when serving html files

headers

A list of headers to add to the response.

validation

An optional validation pattern to compare to the request headers

except

One or more url paths that should be excluded from this route

name

An autogenerated name for the asset route

Methods

Public methods

• AssetRoute$new()

• AssetRoute$print()

• AssetRoute$on_attach()

• AssetRoute$clone()

---

Method new()

Create a new AssetRoute

Usage

AssetRoute$new(
  at,
  path,
  use_index = TRUE,
  fallthrough = FALSE,
  html_charset = "utf-8",
  headers = list(),
  validation = NULL,
  except = NULL
)

Arguments

at

The url path to listen to requests on

path

The path to the file or directory on the file system

use_index

Should an index.html file be served if present when a client requests the folder

fallthrough

Should requests that doesn't match a file enter the request loop or have a 404 response send directly

html_charset

The charset to report when serving html files

headers

A list of headers to add to the response. Will be combined with the global headers of the app

validation

A string for validating incoming requests. See httpuv::staticPath

except

One or more url paths that should be excluded from the route. Requests matching these will enter the standard router dispatch. The paths are interpreted as subpaths to at, e.g. the final path to exclude will be at+exclude

---

Method print()

Pretty printing of the object

Usage

AssetRoute$print(...)

Arguments

...

Ignored

---

Method on_attach()

Method for use by fiery when attached as a plugin. Should not be called directly. This method creates a RouteStack with the asset route as the single route and then mounts that to the app. For more flexibility create the RouteStack manually

Usage

AssetRoute$on_attach(app, on_error = NULL, ...)

Arguments

app

The Fire object to attach the router to

on_error

A function for error handling

...

Ignored

---

Method clone()

The objects of this class are cloneable with this method.

Usage

AssetRoute$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

routr documentation built on Aug. 21, 2025, 5:47 p.m.