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use flate2::write::{GzDecoder, GzEncoder};
use flate2::Compression;
use std::io;
use std::io::prelude::*;
// Compress a sample string and print it after transformation.
fn main() {
let mut e = GzEncoder::new(Vec::new(), Compression::default());
e.write_all(b"Hello World").unwrap();
let bytes = e.finish().unwrap();
println!("{}", decode_writer(bytes).unwrap());
}
// Uncompresses a Gz Encoded vector of bytes and returns a string or error
// Here &[u8] implements Read
fn decode_writer(bytes: Vec<u8>) -> io::Result<String> {
let mut writer = Vec::new();
let mut decoder = GzDecoder::new(writer);
decoder.write_all(&bytes[..])?;
decoder.try_finish()?;
writer = decoder.finish()?;
let return_string = String::from_utf8(writer).expect("String parsing error");
Ok(return_string)
}
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