Crate infer

Source
Expand description

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§