1 extern crate flate2; 2 3 use flate2::write::{GzDecoder, GzEncoder}; 4 use flate2::Compression; 5 use std::io; 6 use std::io::prelude::*; 7 8 // Compress a sample string and print it after transformation. main()9fn main() { 10 let mut e = GzEncoder::new(Vec::new(), Compression::default()); 11 e.write_all(b"Hello World").unwrap(); 12 let bytes = e.finish().unwrap(); 13 println!("{}", decode_writer(bytes).unwrap()); 14 } 15 16 // Uncompresses a Gz Encoded vector of bytes and returns a string or error 17 // Here &[u8] implements Read decode_writer(bytes: Vec<u8>) -> io::Result<String>18fn decode_writer(bytes: Vec<u8>) -> io::Result<String> { 19 let mut writer = Vec::new(); 20 let mut decoder = GzDecoder::new(writer); 21 decoder.write_all(&bytes[..])?; 22 decoder.try_finish()?; 23 writer = decoder.finish()?; 24 let return_string = String::from_utf8(writer).expect("String parsing error"); 25 Ok(return_string) 26 } 27