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|
use std::time::{UNIX_EPOCH, SystemTime, Duration};
use std::ops::ControlFlow;
use std::net::SocketAddr;
use std::str::FromStr;
use anyhow::{anyhow, Context};
use askama::Template;
use axum::{
Form,
Json,
Router,
extract::State,
extract::{ws::{Message, WebSocket, WebSocketUpgrade}, ConnectInfo},
http::StatusCode,
response::IntoResponse,
routing::{get, post},
};
use chrono::serde::ts_seconds;
use futures::{StreamExt, SinkExt};
use log::{debug, info, warn, error};
use serde::Deserialize;
use tower_http::services::ServeDir;
use ham_cats::{
buffer::Buffer,
whisker::{Identification, Destination},
};
use crate::{config, radio::MAX_PACKET_LEN};
use crate::SharedState;
pub async fn serve(port: u16, shared_state: SharedState) {
let app = Router::new()
.route("/", get(dashboard))
.route("/chat", get(chat))
.route("/chat/ws", get(ws_handler))
.route("/send", get(send))
.route("/api/send_packet", post(post_packet))
.route("/settings", get(show_settings).post(post_settings))
.nest_service("/static", ServeDir::new("static"))
/* For an example for timeouts and tracing, have a look at the git history */
.with_state(shared_state);
let listener = tokio::net::TcpListener::bind(("0.0.0.0", port)).await.unwrap();
axum::serve(listener,
app.into_make_service_with_connect_info::<SocketAddr>())
.await.unwrap()
}
#[derive(PartialEq)]
enum ActivePage {
Dashboard,
Chat,
Send,
Settings,
None,
}
impl ActivePage {
// Used by templates/head.html to include the correct js files in <head>
fn styles(&self) -> Vec<&'static str> {
match self {
ActivePage::Dashboard => vec![],
ActivePage::Chat => vec!["chat.js", "main.js", "strftime.js"],
ActivePage::Send => vec!["send.js", "main.js", "strftime.js"],
ActivePage::Settings => vec![],
ActivePage::None => vec![],
}
}
}
#[derive(Template)]
#[template(path = "dashboard.html")]
struct DashboardTemplate<'a> {
title: &'a str,
page: ActivePage,
conf: config::Config,
node_startup_time: String,
num_received_frames: u64,
packets: Vec<UIPacket>,
}
#[derive(Clone, serde::Serialize)]
pub struct UIPacket {
#[serde(with = "ts_seconds")]
pub received_at: chrono::DateTime<chrono::Utc>,
pub from_callsign : String,
pub from_ssid : u8,
pub comment : Option<String>,
}
impl UIPacket {
fn received_at_iso(&self) -> String {
self.received_at.to_string()
}
fn from_db_packet(db_packet: &crate::db::Packet) -> Option<Self> {
let mut buf = [0; MAX_PACKET_LEN];
match ham_cats::packet::Packet::fully_decode(&db_packet.content, &mut buf) {
Ok(p) => {
if let Some(ident) = p.identification() {
let mut commentbuf = [0; 1024];
let comment = match p.comment(&mut commentbuf) {
Ok(c) => Some(c.to_owned()),
Err(_) => None,
};
Some(UIPacket {
received_at : db_packet.received_at,
from_callsign : ident.callsign.to_string(),
from_ssid : ident.ssid,
comment
})
}
else {
None
}
},
Err(e) => {
warn!("Failed to decode packet {}: {}", db_packet.id, e);
None
},
}
}
}
async fn dashboard(State(state): State<SharedState>) -> DashboardTemplate<'static> {
let (conf, mut db, node_startup_time) = {
let st = state.lock().unwrap();
(st.conf.clone(), st.db.clone(), st.start_time.clone())
};
let packets = match db.get_most_recent_packets(10).await {
Ok(v) => v,
Err(e) => {
warn!("Dashboard will have empty packet list: {}", e);
Vec::new()
},
}.iter()
.filter_map(|p| UIPacket::from_db_packet(p))
.collect();
let node_startup_time = format!("{} UTC",
node_startup_time.format("%Y-%m-%d %H:%M:%S"));
DashboardTemplate {
title: "Dashboard",
conf,
page: ActivePage::Dashboard,
num_received_frames : db.get_num_received_frames(),
node_startup_time,
packets,
}
}
#[derive(Template)]
#[template(path = "chat.html")]
struct ChatTemplate<'a> {
title: &'a str,
page: ActivePage,
conf: config::Config,
packets: Vec<UIPacket>,
}
async fn chat(State(state): State<SharedState>) -> ChatTemplate<'static> {
let (conf, mut db) = {
let st = state.lock().unwrap();
(st.conf.clone(), st.db.clone())
};
let time_start = SystemTime::now() - Duration::from_secs(6*3600);
let timestamp = time_start
.duration_since(UNIX_EPOCH)
.expect("Time went backwards");
let timestamp_i64 : i64 = timestamp.as_secs().try_into().unwrap();
let packets = match db.get_packets_since(timestamp_i64).await {
Ok(packets) => {
packets.iter()
.filter_map(|p| UIPacket::from_db_packet(p))
.collect()
},
Err(e) => {
error!("Failed to get packets since TS: {e}");
vec![]
}
};
ChatTemplate {
title: "Chat",
conf,
page: ActivePage::Chat,
packets
}
}
async fn ws_handler(
State(state): State<SharedState>,
ws: WebSocketUpgrade,
ConnectInfo(addr): ConnectInfo<SocketAddr>) -> impl IntoResponse {
info!("User at {addr} connected.");
let rx = state.lock().unwrap().ws_broadcast.subscribe();
ws.on_upgrade(move |socket| handle_socket(socket, rx, addr))
}
async fn handle_socket(
mut socket: WebSocket,
mut rx: tokio::sync::broadcast::Receiver<UIPacket>,
who: SocketAddr) {
if socket.send(Message::Ping(vec![1])).await.is_ok() {
info!("Pinged {who}...");
} else {
info!("Could not ping {who}!");
return;
}
let (mut sender, mut receiver) = socket.split();
let mut send_task = tokio::spawn(async move {
while let Ok(m) = rx.recv().await {
debug!("Sending {:?} to {who}", m.comment);
match serde_json::to_string(&m) {
Ok(m_json) => if sender
.send(Message::Text(m_json))
.await
.is_err()
{
return;
},
Err(e) => {
warn!("Could not convert message to json: {e}");
}
}
}
});
let mut recv_task = tokio::spawn(async move {
while let Some(Ok(msg)) = receiver.next().await {
if process_message(msg, who).is_break() {
break;
}
}
});
// If any one of the tasks exit, abort the other.
tokio::select! {
_rv_a = (&mut send_task) => {
recv_task.abort();
},
_rv_b = (&mut recv_task) => {
send_task.abort();
}
}
info!("Websocket context {who} destroyed");
}
fn process_message(msg: Message, who: SocketAddr) -> ControlFlow<(), ()> {
match msg {
Message::Text(t) => {
debug!(">>> {who} sent str: {t:?}");
}
Message::Binary(d) => {
debug!(">>> {} sent {} bytes: {:?}", who, d.len(), d);
}
Message::Close(c) => {
if let Some(cf) = c {
debug!(
">>> {} sent close with code {} and reason `{}`",
who, cf.code, cf.reason
);
} else {
debug!(">>> {who} somehow sent close message without CloseFrame");
}
return ControlFlow::Break(());
}
Message::Pong(v) => {
debug!(">>> {who} sent pong with {v:?}");
}
// You should never need to manually handle Message::Ping, as axum's websocket library
// will do so for you automagically by replying with Pong and copying the v according to
// spec. But if you need the contents of the pings you can see them here.
Message::Ping(v) => {
debug!(">>> {who} sent ping with {v:?}");
}
}
ControlFlow::Continue(())
}
#[derive(Template)]
#[template(path = "send.html")]
struct SendTemplate<'a> {
title: &'a str,
page: ActivePage,
conf: config::Config,
}
async fn send(State(state): State<SharedState>) -> SendTemplate<'static> {
SendTemplate {
title: "Send",
conf: state.lock().unwrap().conf.clone(),
page: ActivePage::Send,
}
}
#[derive(Deserialize, Debug)]
struct ApiSendPacketDestination {
callsign : String,
ssid : u8,
}
#[derive(Deserialize, Debug)]
struct ApiSendPacket {
destinations : Vec<ApiSendPacketDestination>,
comment : Option<String>,
}
fn build_packet(config: config::Config, payload: ApiSendPacket) -> anyhow::Result<Vec<u8>> {
let mut buf = [0; crate::radio::MAX_PACKET_LEN];
let mut pkt = ham_cats::packet::Packet::new(&mut buf);
pkt.add_identification(
Identification::new(&config.callsign, config.ssid, config.icon)
.context("Invalid identification")?,
)
.map_err(|e| anyhow!("Could not add identification to packet: {e}"))?;
if let Some(c) = payload.comment {
pkt.add_comment(&c)
.map_err(|e| anyhow!("Could not add comment to packet: {e}"))?;
}
for dest in payload.destinations {
let dest = Destination::new(false, 0, &dest.callsign, dest.ssid)
.ok_or(anyhow!("Cound not create destination"))?;
pkt.add_destination(dest)
.map_err(|e| anyhow!("Could not add destination to packet: {e}"))?;
}
let mut buf2 = [0; crate::radio::MAX_PACKET_LEN];
let mut data = Buffer::new_empty(&mut buf2);
pkt.fully_encode(&mut data)
.map_err(|e| anyhow!("Could not encode packet: {e}"))?;
Ok(data.to_vec())
}
async fn post_packet(State(state): State<SharedState>, Json(payload): Json<ApiSendPacket>) -> StatusCode {
let (config, transmit_queue, mut db, ws_broadcast) = {
let s = state.lock().unwrap();
(s.conf.clone(), s.transmit_queue.clone(), s.db.clone(), s.ws_broadcast.clone())
};
info!("send_packet {:?}", payload);
let m = UIPacket {
received_at: chrono::Utc::now(),
from_callsign: config.callsign.to_string(),
from_ssid: config.ssid,
comment: payload.comment.clone(),
};
match build_packet(config, payload) {
Ok(p) => {
info!("Built packet of {} bytes", p.len());
match ws_broadcast.send(m) {
Ok(num) => debug!("Send own WS message to {num}"),
Err(_) => debug!("No WS receivers currently"),
}
match transmit_queue.send(p.clone()).await {
Ok(()) => {
if let Err(e) = db.store_packet(&p[2..]).await {
warn!("Failed to write outgoing packet to sqlite: {}", e);
}
StatusCode::OK
},
Err(_) => StatusCode::BAD_REQUEST,
}
},
Err(_) => StatusCode::INTERNAL_SERVER_ERROR,
}
}
#[derive(Template)]
#[template(path = "settings.html")]
struct SettingsTemplate<'a> {
title: &'a str,
page: ActivePage,
conf: config::Config,
}
async fn show_settings(State(state): State<SharedState>) -> SettingsTemplate<'static> {
SettingsTemplate {
title: "Settings",
page: ActivePage::Settings,
conf: state.lock().unwrap().conf.clone(),
}
}
#[derive(Deserialize, Debug)]
struct FormConfig {
freq: String,
callsign: String,
ssid: String,
icon: String,
// felinet
// felinet_enabled is either "on" or absent.
// According to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input/checkbox
// "If the value attribute was omitted, the default value for the checkbox is `on` [...]"
felinet_enabled: Option<String>,
address: String,
// beacon
period_seconds: config::DurationSeconds,
max_hops: u8,
latitude: String,
longitude: String,
altitude: String,
comment: String,
antenna_height: String,
antenna_gain: String,
tx_power: String,
// tunnel
tunnel_enabled: Option<String>,
local_ip: String,
netmask: String,
}
fn empty_string_to_none<T: FromStr + Sync>(value: &str) -> Result<Option<T>, T::Err> {
if value.is_empty() {
Ok(None)
}
else {
Ok(Some(value.parse()?))
}
}
impl TryFrom<FormConfig> for config::Config {
type Error = anyhow::Error;
fn try_from(value: FormConfig) -> Result<Self, Self::Error> {
Ok(config::Config {
freq: value.freq.parse()?,
callsign: value.callsign,
ssid: value.ssid.parse()?,
icon: value.icon.parse()?,
felinet: config::FelinetConfig {
enabled: value.felinet_enabled.is_some(),
address: value.address,
},
beacon: config::BeaconConfig {
period_seconds: value.period_seconds,
max_hops: value.max_hops,
latitude: empty_string_to_none(&value.latitude)?,
longitude: empty_string_to_none(&value.longitude)?,
altitude: empty_string_to_none(&value.altitude)?,
comment: empty_string_to_none(&value.comment)?,
antenna_height: empty_string_to_none(&value.antenna_height)?,
antenna_gain: empty_string_to_none(&value.antenna_gain)?,
tx_power: empty_string_to_none(&value.tx_power)?,
},
tunnel: config::TunnelConfig {
enabled: value.tunnel_enabled.is_some(),
local_ip: value.local_ip,
netmask: value.netmask,
},
})
}
}
#[derive(Template)]
#[template(path = "settings_applied.html")]
struct SettingsAppliedTemplate<'a> {
title: &'a str,
page: ActivePage,
conf: config::Config,
ok: bool,
error_message: &'a str,
error_reason: String,
}
async fn post_settings(
State(state): State<SharedState>,
Form(input): Form<FormConfig>) -> (StatusCode, SettingsAppliedTemplate<'static>) {
match config::Config::try_from(input) {
Ok(c) => {
match c.store() {
Ok(()) => {
state.lock().unwrap().conf.clone_from(&c);
(StatusCode::OK, SettingsAppliedTemplate {
title: "Settings",
conf: c,
page: ActivePage::None,
ok: true,
error_message: "",
error_reason: "".to_owned(),
})
}
Err(e) => {
(StatusCode::INTERNAL_SERVER_ERROR, SettingsAppliedTemplate {
title: "Settings",
conf : c,
page: ActivePage::None,
ok: false,
error_message: "Failed to store config",
error_reason: e.to_string(),
})
},
}
},
Err(e) => {
(StatusCode::BAD_REQUEST, SettingsAppliedTemplate {
title: "Settings",
conf: state.lock().unwrap().conf.clone(),
page: ActivePage::None,
ok: false,
error_message: "Error interpreting POST data",
error_reason: e.to_string(),
})
},
}
}
|
