duplo 0.1.2

Web application for easy deployment of a file sharing portal in private networks
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use std::{net::SocketAddr, path::PathBuf, sync::Arc, time::Duration};

use axum::{
    http::{header::CONTENT_SECURITY_POLICY, HeaderValue},
    response::Redirect,
    routing::{get, get_service, post},
    Extension, Router, extract::DefaultBodyLimit,
};
use tower_http::services::ServeDir;

/// simple insecure HTTP server with anonymous file upload (including html/js upload and publication)
#[derive(argh::FromArgs)]
struct Opts {
    /// socket address to bind TCP socket and listen for including HTTP requests
    #[argh(positional)]
    listen_socket: SocketAddr,

    /// serve (and upload) files from this directory at /transient/
    #[argh(option, short = 't')]
    transiet_directory: PathBuf,

    /// serve (and upload) files from this directory at /permanent/
    #[argh(option, short = 'p')]
    permanent_directory: PathBuf,

    /// maximum number of files allowed to reside in transient and permanent directories. Default is 1000
    #[argh(option, default = "1000")]
    max_files: u64,

    /// maximum number of bytes allowed to reside in transient and permanent directories. Default is 10GB
    #[argh(option, default = "10_000_000_000")]
    max_bytes: u64,

    /// time of day (UTC+0 timezone) to trigger the cleanup event on. Default is `00:00:00`
    #[argh(option, default = "time::Time::MIDNIGHT", from_str_fn(parsetime))]
    cleanup_time_utc: time::Time,

    /// clean up files older than this number of hours from the transient directory. Default is 24.  
    #[argh(option, default = "24")]
    cleanup_maxhours: u64,

    /// page title for transient directory's filelist
    #[argh(option, default = "\"Duplo\".to_owned()")]
    transient_title: String,

    /// page title for permanent directory's filelist
    #[argh(option, default = "\"Duplo (permanent)\".to_owned()")]
    permanent_title: String,

    /// set this Content-Security-Policy header for served files
    #[argh(option, default = "\"default-src 'none'; img-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'wasm-unsafe-eval'; connect-src 'none'; frame-ancestors 'none'\".to_owned()")]
    content_security_policy: String,
}

mod actions;
mod disksize;
mod embedded_resources;
mod file_list;

fn parsetime(x: &str) -> Result<time::Time, String> {
    let format = time::format_description::parse("[hour]:[minute]:[second]").unwrap();
    time::Time::parse(x, &format).map_err(|_| format!("Invalid time `{x}` specified"))
}

struct SharedDirectory {
    dir: PathBuf,
    title: String,
}

#[tokio::main(flavor = "current_thread")]
async fn main() -> anyhow::Result<()> {
    let opts: Opts = argh::from_env();
    tracing_subscriber::fmt::init();

    let listen_socket = opts.listen_socket;
    let transient_directory_ = opts.transiet_directory.clone();

    let quotas = disksize::Quotas::new(opts.max_files, opts.max_bytes);
    quotas.scan_and_add(&opts.permanent_directory)?;
    quotas.scan_and_add(&opts.transiet_directory)?;
    println!(
        "Started, serving {} files and {} bytes",
        quotas.files.get(),
        quotas.bytes.get()
    );
    let quotas = Arc::new(quotas);
    let quotas_ = quotas.clone();

    let uploader = Router::new().route("/", post(actions::upload)).layer(DefaultBodyLimit::disable());

    let app = Router::new()
        .route("/", get(file_list::serve_view))
        .route("/shareText/", post(actions::share_text))
        .route("/remove/", post(actions::remove))
        .nest("/upload/", uploader);

    let security_header_for_content = tower_http::set_header::response::SetResponseHeaderLayer::appending(CONTENT_SECURITY_POLICY, HeaderValue::from_str(
        &opts.content_security_policy
    )?);


    let app_transient = app
        .clone()
        .fallback_service(
            get_service(ServeDir::new(opts.transiet_directory.clone()))
            .layer(security_header_for_content.clone())
            ,
        )
        .layer(Extension(Arc::new(SharedDirectory{dir: opts.transiet_directory, title: opts.transient_title})))
        .with_state(quotas.clone())
        ;
    let app_permanent = app
        .fallback_service(
            get_service(ServeDir::new(opts.permanent_directory.clone()))
            .layer(security_header_for_content),
        )
        .layer(Extension(Arc::new(SharedDirectory{dir: opts.permanent_directory, title: opts.permanent_title})))
        .with_state(quotas);

    std::thread::spawn(move || {
        let Err(e) = disksize::cleanup_task(
            &transient_directory_,
            opts.cleanup_time_utc,
            Duration::from_secs(3600*opts.cleanup_maxhours),
            quotas_,
        ) else {return} ;
        eprintln!("Error from cleanup task: {e}");
        std::process::exit(4);
    });

    let routes = Router::new()
        .route("/", get(|| async { Redirect::permanent("/transient/") }))
        .nest_service("/transient", app_transient)
        .nest_service("/permanent", app_permanent)
        .route("/res/*path", get(embedded_resources::serve_embedded))
        .layer(tower_http::trace::TraceLayer::new_for_http());

    axum::Server::try_bind(&listen_socket)?
        .serve(routes.into_make_service_with_connect_info::<SocketAddr>())
        .await?;
    Ok(())
}