flate2

A streaming compression/decompression library DEFLATE-based streams in Rust.

This crate by default implemented as a wrapper around the miniz_oxide crate, a port of miniz.c to Rust. This crate can also optionally use other backends like the zlib library or miniz.c itself.

Supported formats:

• deflate
• zlib
• gzip

# Cargo.toml
[dependencies]
flate2 = "1.0"

Compression

use std::io::prelude::*;
use flate2::Compression;
use flate2::write::ZlibEncoder;

fn main() {
    let mut e = ZlibEncoder::new(Vec::new(), Compression::default());
    e.write_all(b"foo");
    e.write_all(b"bar");
    let compressed_bytes = e.finish();
}

Decompression

use std::io::prelude::*;
use flate2::read::GzDecoder;

fn main() {
    let mut d = GzDecoder::new("...".as_bytes());
    let mut s = String::new();
    d.read_to_string(&mut s).unwrap();
    println!("{}", s);
}

Backends

Using zlib instead of the (default) Rust backend:

[dependencies]
flate2 = { version = "1.0", features = ["zlib"], default-features = false }

The cloudflare optimized version of zlib is also available. While it's significantly faster it requires a x86-64 CPU with SSE 4.2 or ARM64 with NEON & CRC. It does not support 32-bit CPUs at all and is incompatible with mingw. For more information check the crate documentation.

[dependencies]
flate2 = { version = "1.0", features = ["cloudflare_zlib"], default-features = false }

Using miniz.c:

[dependencies]
flate2 = { version = "1.0", features = ["miniz-sys"], default-features = false }

License

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.