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#[macro_use]
extern crate failure;
#[macro_use]
extern crate log;
extern crate reqwest;
pub mod netlify;
use std::io::Read;
use futures::{executor, future};
use futures::future::FutureExt;
use failure::Error;
use structopt::clap::arg_enum;
use structopt::clap::AppSettings;
use structopt::StructOpt;
use netlify::DNSRecord;
#[cfg(test)]
use mockito;
arg_enum! {
#[derive(Debug)]
pub enum IpType {
IPV4,
IPV6,
}
}
#[derive(Debug, StructOpt)]
#[structopt(
about,
setting(AppSettings::ColoredHelp),
setting(AppSettings::ColorAuto)
)]
pub struct Args {
#[structopt(short, long)]
pub domain: String,
#[structopt(short, long, default_value = "www")]
pub subdomain: String,
#[structopt(short, long, possible_values = &IpType::variants(), case_insensitive = true, default_value = "ipv4")]
pub ip_type: IpType,
#[structopt(short, long, env = "NETLIFY_TOKEN")]
pub token: String,
}
async fn query_ident_me(ip_type: &IpType) -> Result<String, Error> {
let mut body = String::new();
#[cfg(test)]
let mut resp = match ip_type {
IpType::IPV4 => reqwest::get(&mockito::server_url())?,
IpType::IPV6 => reqwest::get(&mockito::server_url())?,
};
#[cfg(not(test))]
let mut resp = match ip_type {
IpType::IPV4 => reqwest::get("https://v4.ident.me/")?,
IpType::IPV6 => reqwest::get("https://v6.ident.me/")?,
};
if resp.status().is_success() {
resp.read_to_string(&mut body)?;
} else {
bail!("Unable to get external IP from ident.me.");
}
Ok(body)
}
async fn query_ipify_org(ip_type: &IpType) -> Result<String, Error> {
let mut body = String::new();
#[cfg(test)]
let mut resp = match ip_type {
IpType::IPV4 => reqwest::get(&mockito::server_url())?,
IpType::IPV6 => reqwest::get(&mockito::server_url())?,
};
#[cfg(not(test))]
let mut resp = match ip_type {
IpType::IPV4 => reqwest::get("https://api.ipify.org/")?,
IpType::IPV6 => reqwest::get("https://api6.ipify.org/")?,
};
if resp.status().is_success() {
resp.read_to_string(&mut body)?;
} else {
bail!("Unable to get external IP from ipify.org.");
}
Ok(body)
}
async fn get_external_ip(ip_type: &IpType) -> Result<String, Error> {
debug!("Querying third-party services for external IP...");
let third_parties = vec![query_ident_me(ip_type).boxed(), query_ipify_org(ip_type).boxed()];
let (ip, _) = future::select_ok(third_parties.into_iter()).await?;
Ok(ip)
}
pub fn run(args: Args) -> Result<(), Error> {
let ip = executor::block_on(get_external_ip(&args.ip_type))?;
let rec = DNSRecord {
hostname: format!("{}.{}", &args.subdomain, &args.domain),
dns_type: match args.ip_type {
IpType::IPV4 => "A".to_string(),
IpType::IPV6 => "AAAA".to_string(),
},
ttl: Some(3600),
value: ip,
id: None,
};
let dns_records = netlify::get_dns_records(&args.domain, &args.token)?;
let (exact, conflicts): (Vec<DNSRecord>, Vec<DNSRecord>) = dns_records
.into_iter()
.filter(|r| match args.ip_type {
IpType::IPV4 => r.dns_type == "A",
IpType::IPV6 => r.dns_type == "AAAA",
})
.filter(|r| {
let v = r.hostname.split('.').collect::<Vec<&str>>();
v.len() == 3 && v[0] == &args.subdomain
})
.partition(|r| r.hostname == rec.hostname && r.value == rec.value);
for r in conflicts {
debug!("Clearing conflicting DNS records for this subdomain.");
netlify::delete_dns_record(&args.domain, &args.token, r)?;
}
if exact.len() == 0 {
netlify::add_dns_record(&args.domain, &args.token, &rec)?;
}
Ok(())
}
#[cfg(test)]
mod test {
use super::*;
use mockito::mock;
#[test]
fn test_get_external_ip() {
let _m = mock("GET", "/")
.with_status(200)
.with_header("content-type", "text/plain")
.with_body("104.132.34.103")
.create();
let ip = executor::block_on(get_external_ip(&IpType::IPV4)).unwrap();
assert_eq!("104.132.34.103", &ip);
let _m = mock("GET", "/")
.with_status(200)
.with_header("content-type", "text/plain")
.with_body("2620:0:1003:fd00:95e9:369a:53cd:f035")
.create();
let ip = executor::block_on(get_external_ip(&IpType::IPV6)).unwrap();
assert_eq!("2620:0:1003:fd00:95e9:369a:53cd:f035", &ip);
}
#[test]
fn test_get_external_ip_404() {
let _m = mock("GET", "/")
.with_status(404)
.with_header("content-type", "text/plain")
.with_body("Not found")
.create();
if let Ok(_) = block_on(get_external_ip(&IpType::IPV6)) {
panic!("Should've gotten an error.");
}
}
}