BtBencode

BtBencode is a library which can help with Bencode encoding/decoding. Bencode is primarily used in BitTorrent related applications.

It uses the Serde library to serialize and deserialize Bencode data. It is similar to Serde JSON in terms of functionality and implementation.

Latest API Documentation

Examples

An example serializing a standard Rust collection type and then deserializing into a custom type:

use std::collections::BTreeMap;
use serde_derive::Deserialize;

let mut dict: BTreeMap<String, String> = BTreeMap::new();
dict.insert(String::from("url"), String::from("https://example.com/"));

let serialized_bytes = bt_bencode::to_vec(&dict)?;

#[derive(Deserialize)]
struct Info<'a> {
    url: &'a str,
}

let info: Info = bt_bencode::from_slice(&serialized_bytes)?;
assert_eq!(info.url, "https://example.com/");

An example deserializing from a slice of bytes into a general Value representation and then from the Value instance into a more strongly typed data structure.

use serde_derive::{Serialize, Deserialize};

use bt_bencode::Value;

#[derive(Serialize, Deserialize)]
struct Info {
    t: String,
    url: String,
}

let serialized_bytes = bt_bencode::to_vec(&Info {
    t: String::from("query"),
    url: String::from("https://example.com/"),
})?;

let value: Value = bt_bencode::from_slice(&serialized_bytes)?;
assert_eq!(value["t"].as_str().unwrap(), "query");
assert_eq!(
    value.get("url").and_then(|url| url.as_str()).unwrap(),
    "https://example.com/"
);

let info: Info = bt_bencode::from_value(value)?;
assert_eq!(info.t, "query");
assert_eq!(info.url, "https://example.com/");

Installation

cargo add bt_bencode

By default, the std feature is enabled.

Alloc only

If the host environment has an allocator but does not have access to the Rust std library:

cargo add --no-default-features --features alloc bt_bencode

License

Licensed under either of Apache License, Version 2.0 or MIT License at your option.

Contributions