first

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "linky"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+axum = { version = "0.6.20", features = ["macros"] }
+tokio = { version = "1.0", features = ["full"] }
+anyhow = "1.0.75"
+minijinja = "1.0.8"
+reqwest = { version = "0.11.22"}
+regex = "1.10.0"
+tl = "0.7.7"
+axum-extra = { version = "0.8.0", features = ["cookie-signed", "cookie"] }
+serde = { version = "1.0.189", features = ["derive"] }

Dockerfile

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+FROM rust:1.73.0 as builder
+
+WORKDIR /build
+
+COPY ./src/ /build/src
+COPY ./Cargo.toml /build/Cargo.toml
+
+RUN rustup update nightly && rustup default nightly && \
+    cargo clean && cargo build --release
+
+FROM debian:buster-slim
+
+WORKDIR /app
+
+COPY --from=builder /build/target/release/linky /app/linky
+
+RUN mkdir /app/service
+
+RUN mkdir /store
+
+COPY ./templates/ /app/templates
+
+CMD [ "/app/linky /store/store.xmlfrag" ]

src/main.rs

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+#![feature(lazy_cell)]
+mod writer;
+
+use axum::{
+    extract::State,
+    http::{HeaderMap, Request, StatusCode},
+    middleware,
+    middleware::Next,
+    response::{Html, Redirect, Response, Result},
+    routing::{get, post},
+    Form, Router,
+};
+use axum_extra::extract::{
+    cookie::{Cookie, Key},
+    SignedCookieJar,
+};
+use minijinja::{context, Environment};
+use serde::Deserialize;
+use std::fs;
+use std::sync::{Arc, LazyLock};
+use std::{env, process::exit};
+use tokio::sync::Mutex;
+use writer::LinkFile;
+
+static SECRET_KEY: LazyLock<Key> = LazyLock::new(Key::generate);
+
+#[tokio::main]
+async fn main() {
+    let args: Vec<String> = env::args().collect();
+    if args.len() < 2 {
+        println!("Need file argument.");
+        exit(1);
+    }
+
+    let store = Arc::new(Mutex::new(LinkFile::new(&args[1])));
+
+    let authenticated = Router::new()
+        .route("/rss.xml", get(get_rss))
+        .route("/sendlink", post(send_link))
+        .with_state(Arc::clone(&store))
+        .layer(middleware::from_fn(authenticate));
+
+    let app = Router::new()
+        .route("/", get(get_index))
+        .route("/login", get(get_login).post(post_login))
+        .with_state(store)
+        .merge(authenticated);
+
+    axum::Server::bind(&"0.0.0.0:8000".parse().unwrap())
+        .serve(app.into_make_service())
+        .await
+        .unwrap();
+}
+
+async fn get_index(
+    State(_state): State<Arc<Mutex<LinkFile>>>,
+    headers: HeaderMap,
+) -> Result<Html<String>, Redirect> {
+    let jar = SignedCookieJar::from_headers(&headers, LazyLock::force(&SECRET_KEY).clone());
+    if let Some(x) = jar.get("auth") {
+        if x.value() == "yeppers" {
+            return Ok(Html(
+                fs::read_to_string("templates/send_link.html").unwrap(),
+            ));
+        }
+    }
+    Err(Redirect::to("/login"))
+}
+
+async fn get_login(State(_state): State<Arc<Mutex<LinkFile>>>) -> Result<Html<String>, Redirect> {
+    Ok(Html(fs::read_to_string("templates/login.html").unwrap()))
+}
+
+async fn get_rss(State(state): State<Arc<Mutex<LinkFile>>>) -> Result<String> {
+    let template = fs::read_to_string("templates/rss.xml").unwrap();
+    let linkfile = state.lock().await;
+    let xmlfrag = fs::read_to_string(linkfile.get_path()).unwrap();
+
+    let link = match env::var("LINKY_LINK") {
+        Ok(v) => v,
+        Err(_) => "https://localhost:8000".to_string(),
+    };
+
+    let mut env = Environment::new();
+    env.add_template("rss_xml", &template).unwrap();
+    let template = env.get_template("rss_xml").unwrap();
+
+    Ok(template
+        .render(context! {
+        xmlfrag => xmlfrag,
+        link => link,
+        })
+        .unwrap())
+}
+
+#[derive(Deserialize)]
+struct LinkData {
+    pub linkdata: String,
+}
+
+async fn send_link(
+    State(state): State<Arc<Mutex<LinkFile>>>,
+    Form(form): Form<LinkData>,
+) -> Result<Redirect> {
+    let string = form.linkdata;
+    let mut linkfile = state.lock().await;
+    for str in string.split_whitespace() {
+        linkfile.add_link(str).await.map_err(|e| {
+            println!("ERROR: {:?}", e);
+            StatusCode::INTERNAL_SERVER_ERROR
+        })?;
+        println!("Added: {}", str);
+    }
+    Ok(Redirect::to("/"))
+}
+
+#[derive(Deserialize)]
+struct LoginInfo {
+    pub password: String,
+}
+
+async fn post_login(
+    State(_state): State<Arc<Mutex<LinkFile>>>,
+    headers: HeaderMap,
+    Form(form): Form<LoginInfo>,
+) -> Result<(SignedCookieJar, Redirect)> {
+    let mut jar = SignedCookieJar::from_headers(&headers, LazyLock::force(&SECRET_KEY).clone());
+
+    if let Some(x) = jar.get("auth") {
+        if x.value() != "yeppers" {
+            jar = jar.remove(x);
+        } else {
+            return Ok((jar, Redirect::to("/")));
+        }
+    }
+
+    let pswd = match env::var("LINKY_PASSWORD") {
+        Ok(v) => v,
+        Err(_) => "linkypassword".to_string(),
+    };
+
+    if form.password == pswd {
+        if let Some(x) = jar.get("auth") {
+            jar = jar.remove(x);
+        }
+        jar = jar.add(Cookie::new("auth", "yeppers"));
+    }
+
+    Ok((jar, Redirect::to("/")))
+}
+
+async fn authenticate<B>(
+    headers: HeaderMap,
+    request: Request<B>,
+    next: Next<B>,
+) -> Result<Response, Redirect> {
+    let jar = SignedCookieJar::from_headers(&headers, LazyLock::force(&SECRET_KEY).clone());
+    if let Some(x) = jar.get("auth") {
+        if x.value() == "yeppers" {
+            return Ok(next.run(request).await);
+        }
+    }
+
+    Err(Redirect::to("/login"))
+}

src/writer.rs

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+use anyhow::{Context, Result};
+use minijinja::{context, Environment};
+use reqwest::Client;
+use std::fs::{File, OpenOptions};
+use std::io::Write;
+use std::path::{Path, PathBuf};
+use std::time::Duration;
+use tokio::time::timeout;
+
+const TEMPLATE_STRING: &str = "
+<item>
+    <title> {{ title }} </title>
+    <link> {{ link }} </link>
+</item>
+
+";
+
+pub struct LinkFile {
+    file: File,
+    client: Client,
+    path: PathBuf,
+}
+
+async fn get_link_title(client: &Client, link: &str) -> Result<String> {
+    let res = timeout(
+        Duration::from_secs(120),
+        timeout(Duration::from_secs(120), client.get(link).send())
+            .await??
+            .text(),
+    )
+    .await??;
+
+    let dom = tl::parse(&res, tl::ParserOptions::default())?;
+    let elem = dom
+        .query_selector("title")
+        .and_then(|mut iter| iter.next())
+        .context("No title")?;
+    let node = elem.get(dom.parser()).context("No title")?;
+    Ok(node.inner_text(dom.parser()).to_string())
+}
+
+impl LinkFile {
+    pub fn new(path: impl AsRef<Path> + Clone) -> Self {
+        let file = OpenOptions::new().append(true).open(path.clone()).unwrap();
+        let client = Client::new();
+        Self {
+            file,
+            client,
+            path: path.as_ref().to_path_buf(),
+        }
+    }
+
+    pub async fn add_link(&mut self, link: &str) -> Result<()> {
+        let title = match get_link_title(&self.client, link).await {
+            Ok(s) => s,
+            Err(_) => link.to_string(),
+        };
+
+        let mut env = Environment::new();
+        env.add_template("rss_fragment", TEMPLATE_STRING)?;
+        let template = env.get_template("rss_fragment")?;
+
+        self.file.write_all(
+            template
+                .render(context! {
+                title => title,
+                link => link,
+                })?
+                .as_bytes(),
+        )?;
+        Ok(())
+    }
+
+    pub fn get_path(&self) -> PathBuf {
+        self.path.clone()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use crate::writer::LinkFile;
+
+    #[test]
+    fn test_linkfile() {
+        let mut linkfile = LinkFile::new("./store.xmlfrag");
+        linkfile.add_link("https://evilmuff.in").unwrap();
+    }
+}

store.xmlfrag

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+

templates/login.html

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+<html>
+    <head><title>LINKYLINKYLINKYLINKYLINKY</title></head>
+
+    <body>
+        Login: 
+        <form method="post" action="/login">
+            <input type="password" id="password" name="password"/>
+            <input type="submit" value="Submit/>
+        </form>
+    </body>
+</html>

templates/rss.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+    <channel>
+        <title>LINKYLINKYLINKYLINKYLINKY</title>
+        <description>Linky.</description>
+        <link>{{ link }}</link>
+        <atom:link href="{{ link }}/rss.xml" rel="self" type="application/rss+xml" />
+        <language>en</language>
+
+            {{ xmlfrag }}
+
+  </channel>
+</rss>

templates/send_link.html

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+<html>
+    <head><title>LINKYLINKYLINKYLINKYLINKY</title></head>
+
+    <body>
+        Send link:
+        <form method="post" action="/sendlink">
+            <textarea name="linkdata" id="linkdata" cols="50" rows="10"></textarea>
+            <input type="submit" value="Submit"/>
+        </form>
+    </body>
+</html>