# fileidentifier
This repo is a library for both Rust and Javascript (Node.js).
It does not identify files using file extension but using magic number.
So It helps you to check files better.

## Installation
* For Rust, you can install it from [crates.io](https://crates.io/crates/fileidentifier)
* For Node.js, It is available in [npm](https://npmjs.com/package/fileidentifier)

## How to use
in Rust:
```rust
use std::fs;
use fileidentifier::check::{FileFormat, get_file_format, is_png};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let file = fs::read("/usr/bin/whatever")?;

    assert_eq!(FileFormat::Script, get_file_format(&file));

    // or you can check the file format
    let png = fs::read("/file/path/x.png")?;

    assert_eq!(true, is_png(&png));

    Ok(())
}
```

in Node.js:

```javascript
    const fi = require('fileidentifier')

    let file = fs::readFileSync('/file/path/x.png')

    console.log(fi.getFileFormat(file)) // It will print 'png'

    // check the file format

    console.log(fi.isPng(file)) // It will print true
```