shell
cargo add mime-db
```rust use mime_db::{extension, extensions, lookup};
asserteq!(lookup("json").unwrap(), "application/json"); asserteq!(lookup(".md").unwrap(), "text/markdown"); asserteq!(lookup("folder/file.js").unwrap(), "application/javascript"); asserteq!(lookup("folder/.htaccess"), None); assert_eq!(lookup("cats"), None);
assert_eq!( extensions("application/octet-stream").unwrap(), vec![ "bin", "dms", "lrf", "mar", "so", "dist", "distz", "pkg", "bpk", "dump", "elc", "deploy", "exe", "dll", "deb", "dmg", "iso", "img", "msi", "msp", "msm", "buffer" ] );
assert_eq!(extension("application/octet-stream").unwrap(), "bin");
```
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