dwutil 0.1.1

simple and easy use downloader
Documentation 
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use std::io::{Cursor, Read};

use xz2::read::XzDecoder;

use crate::decompress::{Decoder, DecoderFactory};

pub struct TarXz {
    decoder: xz2::read::XzDecoder<Cursor<Vec<u8>>>,
}
impl Decoder for TarXz {
    fn extract(&mut self, destination: std::path::PathBuf) -> Result<(), String> {
        let mut buf = Vec::new();
        self.decoder
            .read_to_end(&mut buf)
            .map_err(|e| e.to_string())?;
        let mut archive = tar::Archive::new(Cursor::new(buf));
        archive.unpack(destination).map_err(|e| e.to_string())?;
        Ok(())
    }
}

pub struct TarXzFactory;
impl DecoderFactory for TarXzFactory {
    fn supports(file: &[u8]) -> bool {
        if !infer::is(file, "xz") {
            return false;
        };
        let mut decoder = XzDecoder::new(Cursor::new(file));
        let mut buf = Vec::new();
        decoder.read_to_end(&mut buf).unwrap_or(0);
        infer::is(&buf, "tar")
    }
    fn from_bytes(bytes: Vec<u8>) -> std::io::Result<Box<dyn Decoder>> {
        let decoder = XzDecoder::new(Cursor::new(bytes));
        Ok(Box::new(TarXz { decoder }))
    }
}