1 use flate2::bufread;
2 use std::env::args;
3 use std::fs::File;
4 use std::io::copy;
5 use std::io::BufReader;
6 use std::time::Instant;
7 
main()8 fn main() {
9     // E.g. `cargo run --example decompress_file examples/hello_world.txt.gz hello_world.txt`
10     if args().len() != 3 {
11         eprintln!("Usage: ./decompress_file `source` `target`");
12         return;
13     }
14     let input = BufReader::new(File::open(args().nth(1).unwrap()).unwrap());
15     let mut output = File::create(args().nth(2).unwrap()).unwrap();
16     let source_len = input.get_ref().metadata().unwrap().len();
17     let start = Instant::now();
18     let mut decoder = bufread::GzDecoder::new(input);
19     copy(&mut decoder, &mut output).unwrap();
20     println!("Source len: {:?}", source_len);
21     println!("Target len: {:?}", output.metadata().unwrap().len());
22     println!("Elapsed: {:?}", start.elapsed());
23 }
24