mime-sniffer

Detecting mime types base on content sniffer.

Document

The detection workflow was copied from Chromium

For more detail, please read How Mozilla determines MIME Types.

Usage

To use mime-sniffer, first add this to your Cargo.toml:

[dependencies]
mime-sniffer = "^0.1"

Then, add this to your crate root:

extern crate mime_sniffer;

use mime_sniffer::MimeTypeSniffer;

And then, use hash function with module or hasher

use mime_sniffer::MimeTypeSniffer;

assert_eq!(Some("application/pdf"), b"%PDF-1.5".sniff_mime_type());

Examples

extern crate url;
#[macro_use]
extern crate mime;
extern crate mime_sniffer;

use url::Url;

use mime_sniffer::{HttpRequest, MimeTypeSniffer, MimeTypeSniffable, MimeTypeSnifferExt};

let url = Url::parse("http://localhost/notes.ppt").unwrap();
let req = HttpRequest {
    content: b"\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1",
    url: &url,
    type_hint: "text/plain",
};

assert!(req.should_sniff_mime_type());
assert_eq!(req.sniff_mime_type(), Some("application/vnd.ms-powerpoint"));
assert_eq!(req.sniff_mime_type_ext().unwrap().type_(), mime::APPLICATION);

Related

• To recognize binary file type, you may need libmagic with rust binding rust-magic crate.
• To guess MIME type by file extension, you may need mime_guess crate.
• To manage MIME type as strong types, you may need mime.rs crate.