mmdb-writer 0.1.0

Write MaxMind DB (.mmdb) files: build IP-to-data lookup databases that any MaxMind-compatible reader can consume.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

//! Build a small database with the `Value` API (no serde required) and write it to a file.
//!
//! Run with: `cargo run --example basic`

use std::error::Error;

use ipnet::IpNet;
use mmdb_writer::{Value, Writer};

fn main() -> Result<(), Box<dyn Error>> {
    let mut writer = Writer::new("Example-ASN-DB");

    writer.insert_value(
        "192.0.2.0/24".parse::<IpNet>()?,
        Value::map([
            ("autonomous_system_number", Value::from(64_512_u32)),
            (
                "autonomous_system_organization",
                Value::from("Example, Inc."),
            ),
        ]),
    )?;

    writer.insert_value(
        "2001:db8::/32".parse::<IpNet>()?,
        Value::map([("autonomous_system_number", Value::from(65_000_u32))]),
    )?;

    let bytes = writer.to_bytes()?;
    std::fs::write("example-asn.mmdb", &bytes)?;
    println!("wrote example-asn.mmdb ({} bytes)", bytes.len());
    Ok(())
}