gzdecoder-write.rs

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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)