Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 5 Nov 2026. What's built · Install 0.3.0
jadpo
ReferenceWeb and network

LanguageValues and typesStandard typesWeb and network

FileType

On this page

A file's media type: image/png, application/pdf and so on.

Use it to say which kinds of file an upload accepts.

Shape

One of these 8 values:

Value Written
FileType.png image/png
FileType.jpeg image/jpeg
FileType.webp image/webp
FileType.pdf application/pdf
FileType.csv text/csv
FileType.tsv text/tab-separated-values
FileType.json application/json
FileType.json_lines application/jsonl

Example

example
FileType.png

text.parse(raw, as: FileType) reads one from text that comes from outside. Text that isn't one at all fails malformed, such as png or image/tiff.

Good to know

  • It holds a fixed list. Any other media type, such as image/tiff, is refused.
  • == tells you whether two are the same. < and list.sort_by don't take it.

In JSON

A string, in a request, a response or json.write:

json
"image/png""application/pdf"

Details

Text form, storage, how it is shown, and operations

FileType 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: image/png and application/pdf.

How it is stored

It is stored in one column named for the field, of type text. application/pdf is stored as 'application/pdf'.

How it is shown to people

text.format(value, locale:) shows it to people in their locale.

With locale: Locale.en_gb:

Value Shown
image/png image/png
application/pdf application/pdf

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-file-type.md.Built from Jadpo main at aee2e8f.