RustでFREETELのギガ数を取得してInfluxDBにいれてGrafanaで見るまで ~ Dockerに添えて ~ ref: http://qiita.com/tady/items/b58a1e469e73268d0716

docker-compose.yaml

version: "2"

services:
  rust:
    build: .
    volumes:
      - "./mount/rust:/opt/rust"

  influxdb:
    image: influxdb
    ports:
      - "8083:8083"
      - "8086:8086"
    volumes:
      - "./mount/influxdb:/var/lib/influxdb"

  grafana:
    image: grafana/grafana
    ports:
      - "3000:3000"
    volumes:
      - "./mount/grafana:/var/lib/grafana"

Dockerfile

FROM rust:1.19.0
RUN apt-get update && apt-get install -y pkg-config libssl-dev
RUN mkdir -p /opt/rust
WORKDIR /opt/rust

CMD ["sh", "-c", "tail -f /dev/null"]

file0.txt

$ docker -v
Docker version 17.07.0-ce-rc2, build 36ce605

$ docker-compose -v
docker-compose version 1.15.0, build e12f3b9

file10.txt

$ docker-compose exec rust env FREETEL_EMAIL=<メールアドレス> FREETEL_PASSWORD=<パスワード> FREETEL_TEL=<ハイフン無し電話番号> cargo run

file11.txt

let email = env::var("FREETEL_EMAIL").expect("env 'FREETEL_EMAIL' not found");message...

file12.txt

use select::document::Document;
use select::predicate::{Predicate, Attr, Class};
use regex::Regex;

let re_usage = Regex::new(r"([\d\.]+)GB").unwrap();

let mut current_usage: f32 = 0.0;
let mut usage_limit: f32 = 0.0;

let document = Document::from(html);

for node in document.find(Class("sim-usage").descendant((Attr("style", "font-size: x-large;")))).take(1) {
    let text = node.text();
    let caps = re_usage.captures(&text).unwrap();
    current_usage = caps.get(1).unwrap().as_str().parse::<f32>().unwrap();
}

for node in document.find(Class("sim-usage").descendant((Attr("style", "font-size: smaller;")))).take(1) {
    let text = node.text();
    let caps = re_usage.captures(&text).unwrap();
    usage_limit = caps.get(1).unwrap().as_str().parse::<f32>().unwrap();
}

(current_usage, usage_limit)

file13.txt

$ curl -i -XPOST 'http://INFLUXDB_URL' --data 'freetel_usage value=0.64 1503063534888000000'

file14.txt

let timespec = time::get_time();
let current_time_nano = [timespec.sec.to_string(), format!("{:09}", timespec.nsec.to_string())].join("");
let data = [
    format!("freetel_usage value={} {}", current_usage, current_time_nano),
    format!("freetel_limit value={} {}", usage_limit, current_time_nano)
].join("\n");

let client = reqwest::Client::new().unwrap();
let resp = client.post(INFLUXDB_URL).unwrap()
    .body(data.clone())
    .send().unwrap();

println!("resp: {:?}", resp);

if !resp.status().is_success() {
    panic!("influxdb request failed! {}, {:?}, {:?}", INFLUXDB_URL, resp.status(), data);
}

file3.txt

$ docker-compose build

$ docker-compose start
Starting influxdb ... done
Starting rust     ... done
Starting grafana  ... done

$ docker-compose ps
          Name                      Command           State                       Ports
------------------------------------------------------------------------------------------------------------
foo_grafana_1    /run.sh                   Up      0.0.0.0:3000->3000/tcp
foo_influxdb_1   /entrypoint.sh influxd    Up      0.0.0.0:8083->8083/tcp, 0.0.0.0:8086->8086/tcp
foo_rust_1       sh -c tail -f /dev/null   Up

file6.txt

docker-compose exec rust cargo run

file7.txt

// GET
let client = reqwest::Client::new().unwrap();
let mut resp = client.get("http://example.com/").unwrap()
    .header(...) // hedderの付与
    .send().unwrap();

let mut content = String::new(); // レスポンスの入れ物
resp.read_to_string(&mut content).unwrap();


// POST
let client = reqwest::Client::builder().unwrap()
    .redirect(...) // カスタムリダイレクトポリシーの設定
    .build().unwrap();

let params = [
  ("key", "value")
];

// HTTP Post リクエスト実行
let resp = client.post(LOGIN_FORM_URL).unwrap()
    .header(...) // hedderの付与
    .form(&params).unwrap() // formデータの付与
    .send().unwrap();

resp.status() // スレータスの取得
resp.headers() // レスポンスヘッダの取得

file8.txt

// カスタムリダイレクトポリシー
// ログインリクエスト後に別のページに遷移するのを防ぐため `stop()` する
let custom = RedirectPolicy::custom(|attempt| {
    // attempt.url() //=> リダイレクトしようとしている次のURL
    // attempt.previous() //=> リダイレクトしてきた過去のURLの配列
    attempt.stop()
});
let client = reqwest::Client::builder().unwrap()
    .redirect(custom)
    .build().unwrap();

file9.txt

if let Some(set_cookies) = resp.headers().get::<header::SetCookie>() {
      let mut set_cookie_value = String::new();
      for set_cookie in &set_cookies.0 {
          let c = Cookie::parse(set_cookie.clone()).expect("Failed to parse cookie.");
          let (name, value) = c.name_value();

          if name == SESSION_COOKIE_NAME {
              set_cookie_value = value.to_string();
          }
      }
      if set_cookie_value != "" {
          return set_cookie_value;
      }
      panic!("Set-Cookie '{}' does not exist!, Set-Cookies: {:?}", SESSION_COOKIE_NAME, set_cookies);
  } else {
      panic!("Set-Cookie '{}' does not exist!", SESSION_COOKIE_NAME);
  }

main.rs

[package]

name = "freetel_usage"
version = "0.0.1"
authors = [ "tady <a.dat.jp@gmail.com>" ]