vendor/flate2/examples/deflatedecoder-write.rs

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