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