Init

.gitignore

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+/target
+.idea
+Cargo.lock
+*.iml

Cargo.toml

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+[package]
+name = "dnsupdate"
+version = "0.1.0"
+authors = ["Timo Ley <timo@leyt.xyz>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1.0", features = ["full"] }
+reqwest = { version = "0.11", features = ["json"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0.51"
+toml = "0.5.8"
+structopt = "0.3.22"

config.toml

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+token = "cloudflare_token"
+zone = "cloudflare_zone_id"
+entry = "cloudflare_entry_id"
+domain = "subdomain"

src/config.rs

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+use serde::Deserialize;
+
+#[derive(Deserialize)]
+pub struct Config {
+    pub token: String,
+    pub zone: String,
+    pub entry: String,
+    pub domain: String,
+}
+

src/main.rs

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+use std::path::PathBuf;
+use structopt::StructOpt;
+use serde::{Deserialize, Serialize};
+use reqwest::Result;
+use crate::config::Config;
+
+
+mod config;
+
+#[derive(StructOpt)]
+struct Opt {
+    #[structopt(
+    short,
+    long,
+    help = "config file to use",
+    default_value = "./config.toml"
+    )]
+    config: PathBuf,
+}
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let opt = Opt::from_args();
+    let config = std::fs::read(&opt.config).expect("Config file reading error");
+    let config = toml::from_slice::<Config>(&config).expect("Config file parsing error");
+
+    let client = reqwest::ClientBuilder::new().user_agent("curl").build()?;
+    let res: IPInfo = client.get("https://api.myip.com/").send().await?.json().await?;
+    let req = DNSRequest::new(config.domain, res.ip);
+    let url = format!("https://api.cloudflare.com/client/v4/zones/{}/dns_records/{}", config.zone, config.entry);
+    client.put(url).bearer_auth(config.token).json(&req).send().await?;
+
+    Ok(())
+
+}
+
+#[derive(Deserialize)]
+struct IPInfo {
+    ip: String,
+}
+
+#[derive(Serialize)]
+struct DNSRequest {
+    #[serde(rename = "type")]
+    dtype: String,
+    name: String,
+    content: String,
+    ttl: u32,
+    proxied: bool,
+}
+
+impl DNSRequest {
+
+    fn new(name: String, content: String) -> Self {
+        DNSRequest {
+            dtype: "A".to_string(),
+            name,
+            content,
+            ttl: 1,
+            proxied: true
+        }
+    }
+
+}
+