Crate infer

Small crate to infer file and MIME type by checking the magic number signature.

Examples

Get the type of a buffer

let v = vec![0xFF, 0xD8, 0xFF, 0xAA];
let info = infer::Infer::new();
assert_eq!("image/jpeg", info.get(&v).unwrap().mime);
assert_eq!("jpg", info.get(&v).unwrap().ext);

Check path

let info = infer::Infer::new();
let res = info.get_from_path("testdata/sample.jpg");
assert!(res.is_ok());
let o = res.unwrap();
assert!(o.is_some());
let typ = o.unwrap();
assert_eq!("image/jpeg", typ.mime);
assert_eq!("jpg", typ.ext);

Check for specific type

Note individual matcher functions do not require an Infer struct instance.

let v = vec![0xFF, 0xD8, 0xFF, 0xAA];
assert!(infer::image::is_jpeg(&v));

Check for specific type class

let v = vec![0xFF, 0xD8, 0xFF, 0xAA];
let info = infer::Infer::new();
assert!(info.is_image(&v));

Adds a custom file type matcher

fn custom_matcher(buf: &[u8]) -> bool {
    return buf.len() >= 3 && buf[0] == 0x10 && buf[1] == 0x11 && buf[2] == 0x12;
}

let mut info = infer::Infer::new();
info.add("custom/foo", "foo", custom_matcher);

let v = vec![0x10, 0x11, 0x12, 0x13];
let res =  info.get(&v).unwrap();

assert_eq!("custom/foo", res.mime);
assert_eq!("foo", res.ext);

Modules

app

All the supported matchers categorized and exposed as functions

archive

All the supported matchers categorized and exposed as functions

audio

All the supported matchers categorized and exposed as functions

doc

All the supported matchers categorized and exposed as functions

font

All the supported matchers categorized and exposed as functions

image

All the supported matchers categorized and exposed as functions

video

All the supported matchers categorized and exposed as functions

Structs

Infer

Infer is the main struct of the module

Type

Generic information for a type

Type Aliases

Matcher

Matcher function