zlibdecoder-read.rs

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use flate2::read::ZlibDecoder;

use flate2::write::ZlibEncoder;

use flate2::Compression;

use std::io;

use std::io::prelude::*;

// Compress a sample string and print it after transformation.

fn main() {

    let mut e = ZlibEncoder::new(Vec::new(), Compression::default());

    e.write_all(b"Hello World").unwrap();

    let bytes = e.finish().unwrap();

    println!("{}", decode_reader(bytes).unwrap());

// Uncompresses a Zlib Encoded vector of bytes and returns a string or error

// Here &[u8] implements Read

fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {

    let mut z = ZlibDecoder::new(&bytes[..]);

    let mut s = String::new();

    z.read_to_string(&mut s)?;

    Ok(s)