329 lines
11 KiB
Rust
329 lines
11 KiB
Rust
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use std::collections::HashMap;
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use std::sync::Arc;
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use actix_web;
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use binascii;
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use tracker;
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const SERVER: &str = concat!("udpt/", env!("CARGO_PKG_VERSION"));
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pub struct WebServer;
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mod http_responses {
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use std;
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use binascii;
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use serde;
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#[derive(Serialize)]
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pub struct TorrentInfo {
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pub is_flagged: bool,
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pub leecher_count: u32,
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pub seeder_count: u32,
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pub completed: u32,
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}
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#[derive(Serialize)]
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pub struct TorrentList {
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pub offset: u32,
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pub length: u32,
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pub total: u32,
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#[serde(serialize_with = "infohash_as_str")]
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pub torrents: Vec<[u8; 20]>,
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}
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#[derive(Serialize)]
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#[serde(rename_all = "snake_case")]
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pub enum APIResponse {
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Error(String),
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TorrentList(TorrentList),
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TorrentInfo(TorrentInfo),
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}
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fn infohash_as_str<S: serde::Serializer>(field: &Vec<[u8; 20]>, serializer: S) -> Result<S::Ok, S::Error> {
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use serde::ser::SerializeSeq;
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let mut output_str = [0u8; 40];
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let mut seq = serializer.serialize_seq(Some(field.len()))?;
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for infohash in field.iter() {
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let _ = binascii::bin2hex(infohash, &mut output_str);
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let mystr = std::str::from_utf8(&output_str).unwrap();
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seq.serialize_element(mystr)?;
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}
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seq.end()
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}
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}
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struct UdptState {
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// k=token, v=username.
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access_tokens: HashMap<String, String>,
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tracker: Arc<tracker::TorrentTracker>,
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}
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impl UdptState {
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fn new(tracker: Arc<tracker::TorrentTracker>) -> UdptState {
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let mut tokens = HashMap::new();
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tokens.insert(String::from("h311o"), String::from("naim"));
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UdptState{
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tracker,
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access_tokens: tokens,
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}
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}
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}
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#[derive(Debug)]
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struct UdptRequestState {
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current_user: Option<String>,
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}
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impl Default for UdptRequestState {
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fn default() -> Self {
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UdptRequestState{
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current_user: Option::None,
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}
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}
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}
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impl UdptRequestState {
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fn get_user<S>(req: &actix_web::HttpRequest<S>) -> Option<String> {
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let exts = req.extensions();
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let req_state: Option<&UdptRequestState> = exts.get();
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match req_state {
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None => None,
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Option::Some(state) => {
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match state.current_user {
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Option::Some(ref v) => Option::Some(v.clone()),
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None => None,
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}
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}
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}
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}
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}
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struct UdptMiddleware;
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impl actix_web::middleware::Middleware<UdptState> for UdptMiddleware {
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fn start(&self, req: &actix_web::HttpRequest<UdptState>) -> actix_web::Result<actix_web::middleware::Started> {
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let mut req_state = UdptRequestState::default();
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if let Option::Some(token) = req.query().get("token") {
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let app_state : &UdptState = req.state();
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if let Option::Some(v) = app_state.access_tokens.get(token) {
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req_state.current_user = Option::Some(v.clone());
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}
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}
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req.extensions_mut().insert(req_state);
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Ok(actix_web::middleware::Started::Done)
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}
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fn response(&self, req: &actix_web::HttpRequest<UdptState>, mut resp: actix_web::HttpResponse) -> actix_web::Result<actix_web::middleware::Response> {
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resp.headers_mut()
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.insert(actix_web::http::header::SERVER, actix_web::http::header::HeaderValue::from_static(SERVER));
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Ok(actix_web::middleware::Response::Done(resp))
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}
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}
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impl WebServer {
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pub fn new(tracker: Arc<tracker::TorrentTracker>) -> WebServer {
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let server = actix_web::server::HttpServer::new(move || {
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actix_web::App::<UdptState>::with_state(UdptState::new(tracker.clone()))
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.middleware(UdptMiddleware)
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.resource("/t", |r| r.f(Self::view_torrent_list))
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.scope(r"/t/{info_hash:[\dA-Fa-f]{40,40}}", |scope| {
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scope
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.resource("", |r| {
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r.method(actix_web::http::Method::GET).f(Self::view_torrent_stats);
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r.method(actix_web::http::Method::POST).f(Self::torrent_action);
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})
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})
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.resource("/", |r| r.method(actix_web::http::Method::GET).f(Self::view_root))
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});
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match server.bind("0.0.0.0:1212") {
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Ok(v) => {
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v.run();
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},
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Err(_) => {
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eprintln!("failed to bind server");
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}
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}
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WebServer{}
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}
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fn view_root(req: &actix_web::HttpRequest<UdptState>) -> actix_web::HttpResponse {
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actix_web::HttpResponse::build(actix_web::http::StatusCode::OK)
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.content_type("text/html")
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.body(r#"Powered by <a href="https://github.com/naim94a/udpt">https://github.com/naim94a/udpt</a>"#)
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}
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fn view_torrent_list(req: &actix_web::HttpRequest<UdptState>) -> impl actix_web::Responder {
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use std::str::FromStr;
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if UdptRequestState::get_user(req).is_none() {
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return actix_web::Json(http_responses::APIResponse::Error(String::from("access_denied")));
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}
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let req_offset = match req.query().get("offset") {
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None => 0,
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Some(v) => {
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match u32::from_str(v.as_str()) {
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Ok(v) => v,
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Err(_) => 0,
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}
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}
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};
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let mut req_limit = match req.query().get("limit") {
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None => 0,
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Some(v) => {
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match u32::from_str(v.as_str()) {
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Ok(v) => v,
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Err(_) => 0,
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}
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}
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};
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if req_limit > 4096 {
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req_limit = 4096;
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} else if req_limit == 0 {
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req_limit = 1000;
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}
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let app_state: &UdptState = req.state();
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let app_db = app_state.tracker.get_database();
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let total = app_db.len() as u32;
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let mut torrents = Vec::with_capacity(req_limit as usize);
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for (info_hash, _) in app_db.iter().skip(req_offset as usize).take(req_limit as usize) {
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torrents.push(info_hash.clone());
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}
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actix_web::Json(http_responses::APIResponse::TorrentList(http_responses::TorrentList{
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total,
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length: torrents.len() as u32,
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offset: req_offset,
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torrents,
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}))
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}
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fn view_torrent_stats(req: &actix_web::HttpRequest<UdptState>) -> actix_web::HttpResponse {
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use actix_web::FromRequest;
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if UdptRequestState::get_user(req).is_none() {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::UNAUTHORIZED)
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.json(http_responses::APIResponse::Error(String::from("access_denied")));
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}
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let path: actix_web::Path<String> = match actix_web::Path::extract(req) {
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Ok(v) => v,
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Err(_) => {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::INTERNAL_SERVER_ERROR)
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.json(http_responses::APIResponse::Error(String::from("internal_error")));
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}
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};
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let mut info_hash = [0u8; 20];
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if let Err(_) = binascii::hex2bin((*path).as_bytes(), &mut info_hash) {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::BAD_REQUEST)
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.json(http_responses::APIResponse::Error(String::from("invalid_info_hash")));
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}
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let app_state: &UdptState = req.state();
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let db = app_state.tracker.get_database();
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let entry = match db.get(&info_hash) {
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Some(v) => v,
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None => {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::NOT_FOUND)
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.json(http_responses::APIResponse::Error(String::from("not_found")));
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}
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};
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let is_flagged = entry.is_flagged();
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let (seeders, completed, leechers) = entry.get_stats();
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::OK)
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.json(http_responses::APIResponse::TorrentInfo(
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http_responses::TorrentInfo{
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is_flagged,
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seeder_count: seeders,
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leecher_count: leechers,
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completed,
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}
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));
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}
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fn torrent_action(req: &actix_web::HttpRequest<UdptState>) -> actix_web::HttpResponse {
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use actix_web::FromRequest;
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if UdptRequestState::get_user(req).is_none() {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::UNAUTHORIZED)
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.json(http_responses::APIResponse::Error(String::from("access_denied")));
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}
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let query = req.query();
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let action_opt = query.get("action");
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let action = match action_opt {
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Some(v) => v,
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None => {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::BAD_REQUEST)
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.json(http_responses::APIResponse::Error(String::from("action_required")));
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}
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};
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let app_state: &UdptState = req.state();
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let path: actix_web::Path<String> = match actix_web::Path::extract(req) {
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Ok(v) => v,
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Err(_) => {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::INTERNAL_SERVER_ERROR)
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.json(http_responses::APIResponse::Error(String::from("internal_error")));
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}
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};
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let mut info_hash = [0u8; 20];
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if let Err(_) = binascii::hex2bin((*path).as_bytes(), &mut info_hash) {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::BAD_REQUEST)
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.json(http_responses::APIResponse::Error(String::from("invalid_info_hash")));
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}
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match action.as_str() {
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"flag" => {
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app_state.tracker.set_torrent_flag(&info_hash, true);
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::OK)
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.body("")
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},
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"unflag" => {
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app_state.tracker.set_torrent_flag(&info_hash, false);
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::OK)
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.body("")
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},
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"add" => {
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let success = app_state.tracker.add_torrent(&info_hash).is_ok();
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let code = if success { actix_web::http::StatusCode::OK } else { actix_web::http::StatusCode::INTERNAL_SERVER_ERROR };
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return actix_web::HttpResponse::build(code)
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.body("")
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},
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"remove" => {
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let success = app_state.tracker.remove_torrent(&info_hash, true).is_ok();
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let code = if success { actix_web::http::StatusCode::OK } else { actix_web::http::StatusCode::INTERNAL_SERVER_ERROR };
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return actix_web::HttpResponse::build(code)
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.body("")
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},
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_ => {
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return actix_web::HttpResponse::build(actix_web::http::StatusCode::BAD_REQUEST)
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.json(http_responses::APIResponse::Error(String::from("invalid_action")));
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}
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}
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}
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}
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