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flate2

Crates.io Documentation

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

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.