Standard Library

now : timestamp

The time the current request was made.

emptyHtml : html

Blank HTML.

docType : html

The HTML <!DOCTYPE html> declaration

cookie : text -> maybe text

Retrieve the contents of a browser cookie.

addCookie : response -> text -> text -> response

addCookie response key value adds a cookie to a response.

maybe : maybe 'a -> 'b -> ('a -> 'b) -> 'b

Branch on a maybe type.

bindMaybe : maybe 'a -> ('a -> maybe 'b) -> maybe 'b

Chain maybe values.

listHead : list 'a -> maybe 'a

The first element of a list.

true : bool
false : bool
not : bool -> bool

Boolean logic.

Text

textLength : text -> int

The length of the given text.

regexpMatch : text -> text -> bool

regexpMatch regexp text tests text against regexp.

commonMark : text -> html

Parse text as 'common mark'.

IO Actions

liftIO : 'a -> io 'a

Lift a pure expression into io.

genUUID : io text

Generates a unique UUID v4 string

randomBytes : int -> io text

Generates N random bytes, base64 encoded. This is useful for generating session keys.

Responses

redirect : text -> response

Construct a 302 redirect response to the given path.

file : text -> text -> response

file contentType path constructs a response that serves path with the given contentType.

json : 'a -> jsonResponse 'a

Constructs a JSON response with content type application/json. The type variable 'a must be valid JSON - text, int, bool, or lists or records of JSON.

Passwords

hashPassword : text -> password

Hashes a password.

validatePassword : text -> password -> bool

Check a password against a password hash