extern crate flate2_expose; use flate2_expose::read::ZlibEncoder; use flate2_expose::Compression; use std::fs::File; use std::io::prelude::*; // Open file and debug print the compressed contents fn main() { println!("{:?}", open_hello_world().unwrap()); } // Opens sample file, compresses the contents and returns a Vector or error // File implements Read fn open_hello_world() -> std::io::Result> { let f = File::open("examples/hello_world.txt")?; let mut z = ZlibEncoder::new(f, Compression::fast()); let mut result = Vec::new(); z.read_to_end(&mut result)?; Ok(result) }