package mrmime

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An RFC 822 domain can be constructed in two ways. This construction differs from Address.domain. We can construct a common domain via:

let isomorphism = Domain.(v domain [ a "isomorphis"; a "me" ]) ;;
val isomorphism : domain = `Domain ["isomorphis"; "me"]
Domain.to_string isomorphism ;;
- : string = ""

Or a literal domain:

let x25519 = Domain.(v literal "x25519") ;;
val x25519 : domain = `Literal "x25519"
Domain.to_string x25519 ;;
- : string = "[x25519]"
type atom = [
  1. | `Atom of string
type literal = [
  1. | `Literal of string
type 'a domain =
  1. | :: : atom * 'a domain -> 'a Mrmime__.Peano.s domain
  2. | [] : Mrmime__.Peano.z domain
type 'a t

Kind of domain according RFC 822.

  • An usual domain which is a non-empty list of atom elements
  • A `Literal domain which is a string surrounded by brackets.
val atom : string -> atom option

atom x returns a safe atom element. If x does not respect RFC 5322, it returns None. It accepts any characters excepts controls, space and specials characters - for instance, brackets are not allowed.

val atom_exn : string -> atom

Same as atom but raises an Invalid_argument instead None.

val a : string -> atom

Alias of atom_exn.

val literal : string -> literal option

literal x returns a literal domain. If x does not respect RFC 5321, it returns None. It will try to escape control characters (with escape_string).

val literal_exn : string -> literal

Same as literal but raises an Invalid_argument instead to return None.

val domain : 'a domain t

Kind of domain.

val default : string t

Kind of literal.

val make : 'a t -> 'a -> [ `Literal of string | `Domain of string list ] option

make kind v returns a safe domain. It can fail if an user-defined literal-domain (Literal_domain.extension), a literal domain or a domain don't follow standards:

val v : 'a t -> 'a -> [ `Literal of string | `Domain of string list ]

Same as make but raises an Invalid_argument instead None.

val to_string : [ `Literal of string | `Domain of string list ] -> string

to_string x returns a string which represents x as is it in a e-mails.


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