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use anyhow::anyhow;
use scraper::{Html, Selector};
async fn form_get(
client: &reqwest::Client,
addr: &str,
form: &str,
) -> anyhow::Result<Vec<(String, String)>> {
Ok(
Html::parse_document(&client.get(addr).send().await?.text().await?)
.select(&Selector::parse(form).unwrap())
.next()
.ok_or(anyhow!("form for selector {form} not found"))?
.select(&Selector::parse("input").unwrap())
.map(|item| item.value())
.flat_map(|item| {
if matches!(item.attr("type"), Some(x) if x == "checkbox" || x == "submit") {
return None;
}
Some((
item.attr("name")?.into(),
item.attr("value").unwrap_or_default().into(),
))
})
.collect(),
)
}
// this is dumb but it works
// we don't use a hashmap because keys may be duplicated
// this overwrites the entry with a certain key
fn form_set(form: &mut Vec<(String, String)>, key: &str, value: String) {
for entry in form.iter_mut() {
if entry.0 == key {
entry.1 = value;
return;
}
}
form.push((key.into(), value));
}
#[tokio::main]
async fn main() -> anyhow::Result<()> {
dotenv::dotenv()?;
use std::env;
let target_host = env::var("DDNS_TARGET_HOST")?;
let username = env::var("DDNS_USERNAME")?;
let password = env::var("DDNS_PASSWORD")?;
let domain_id = env::var("DDNS_DOMAIN_ID")?;
let target_ip = *dns_lookup::lookup_host(&target_host)?
.first()
.ok_or(anyhow!("no ip found for {target_host}"))?;
let client = reqwest::ClientBuilder::new().cookie_store(true).build()?;
let mut login = form_get(
&client,
"https://cp.istanco.net/clientarea.php",
r#"form[action="https://cp.istanco.net/dologin.php"]"#,
)
.await?;
form_set(&mut login, "username", username);
form_set(&mut login, "password", password);
client
.post("https://cp.istanco.net/dologin.php")
.form(&login)
.send()
.await?;
let manage_url = format!("https://cp.istanco.net/index.php?m=br_dnsmanager&id={domain_id}");
let mut manage = form_get(&client, &manage_url, r#"form[name="br-dnsrecord-manager"]"#).await?;
form_set(&mut manage, "value[]", target_ip.to_string());
form_set(&mut manage, "btnSave", "Save Changes".into());
client.post(&manage_url).form(&manage).send().await?;
Ok(())
}
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