LanguageValues and typesStandard typesWeb and network
Hostname
On this page
A host: a domain name or an IP address.
Use it for what a server connects to. For a name that must be a real domain, use DomainName. To add a scheme, use WebOrigin.
Shape
One value, held as text in one set form, with no parts: 2001:db8::1.
Example
Hostname("localhost")Hostname(raw) checks the text, and text that isn't one breaks the format rule.
text.parse(raw, as: Hostname) reads one from text that comes from outside. Text that isn't one at all fails malformed, such as Example.com, [2001:db8::1] or 2001:DB8::1.
Good to know
- It is lower case. An IPv6 address has no brackets, so
[2001:db8::1]is refused. ==tells you whether two are the same.<andlist.sort_bydon't take it.
In JSON
A string, in a request, a response or json.write:
"example.com""localhost""192.0.2.1"
Details
Text form, storage, how it is shown, and operations
Hostname is in the group Web and network, and has been in Jadpo since 0.1.0.
Text form
text.from writes one standard text form, the same form text.parse reads back: example.com, localhost and 192.0.2.1.
How it is stored
It is stored in one column named for the field, of type text. 192.0.2.1 is stored as '192.0.2.1'.
How it is shown to people
text.format(value, locale:) shows it to people in their locale.
With locale: Locale.en_gb:
| Value | Shown |
|---|---|
example.com |
example.com |
localhost |
localhost |
192.0.2.1 |
192.0.2.1 |
2001:db8::1 |
2001:db8::1 |
Operations
It also takes text.parse, text.from, text.format, json.read, json.write and ==. How every standard type behaves says how they work.
Markdown for agents: /docs/types/type-hostname.md.Built from Jadpo main at aee2e8f.