This crate implements the Concise Binary Object Representation from RFC 7049. It builds on Serde, the generic serialization framework for Rust. CBOR provides a binary encoding for a superset of the JSON data model that is small and very fast to parse.
Serde CBOR supports Rust 1.40 and up. Add this to your Cargo.toml:
[dependencies]
serde_cbor_2 = "0.11.2"Storing and loading Rust types is easy and requires only minimal modifications to the program code.
use std::{error::Error, fs::File};
use serde::{Deserialize, Serialize};
// Types annotated with `Serialize` can be stored as CBOR.
// To be able to load them again add `Deserialize`.
#[derive(Debug, Serialize, Deserialize)]
struct Mascot {
name: String,
species: String,
year_of_birth: u32,
}
fn main() -> Result<(), Box<dyn Error>> {
let ferris = Mascot {
name: "Ferris".to_owned(),
species: "crab".to_owned(),
year_of_birth: 2015,
};
let ferris_file = File::create("examples/ferris.cbor")?;
// Write Ferris to the given file.
// Instead of a file you can use any type that implements `io::Write`
// like a HTTP body, database connection etc.
serde_cbor_2::to_writer(ferris_file, &ferris)?;
let tux_file = File::open("examples/tux.cbor")?;
// Load Tux from a file.
// Serde CBOR performs roundtrip serialization meaning that
// the data will not change in any way.
let tux: Mascot = serde_cbor_2::from_reader(tux_file)?;
println!("{tux:?}");
// prints: Mascot { name: "Tux", species: "penguin", year_of_birth: 1996 }
Ok(())
}There are a lot of options available to customize the format.
To operate on untyped CBOR values have a look at the Value type.
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.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.