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mod cli;
mod log;
mod result;
mod traits;
use std::{
collections::BTreeMap,
io::{Read, Write},
net::{TcpListener, TcpStream},
sync::{Arc, Mutex},
thread::{self},
time::Instant,
};
pub(crate) use self::cli::{CliHttp10StrictMode, CliVerboseMode};
use h10::http::{
headers::{Connection, IntoHeader},
response::Response,
result::{H10LibError, H10LibResult},
status_code::StatusCode,
};
// use self::log::LogLevel;
pub(crate) use self::{
cli::Cli,
result::{ServerError, ServerResult},
traits::IntoResponse,
};
use crate::{pages::Endpoint, CLI_ARGS, FOUR_KBYTES, HTTP10_STRICT_MODE, MAX_ACTIVE_SESSIONS};
pub(crate) struct ServerResponse(Response);
impl ServerResponse {
pub fn new(status: StatusCode) -> Self {
if HTTP10_STRICT_MODE.get().is_some() {
Self(Response::new(status))
} else {
Self(Response::new(status).add_header(Connection::default()))
}
}
pub fn add_header<H: IntoHeader>(self, header: H) -> Self {
Self(self.0.add_header(header))
}
pub fn set_body<B: AsRef<str>>(self, body: B) -> Self {
Self(self.0.set_body(body))
}
}
impl IntoResponse for ServerResponse {
fn into_response(self) -> Response {
self.0
}
}
pub(crate) struct HttpServer;
impl HttpServer {
const CHUNK_SIZE: usize = FOUR_KBYTES;
fn listener(cli_data: &Cli) -> String {
format!("{}:{}", cli_data.ip_address, cli_data.port)
}
pub fn run() -> ServerResult<()> {
if let Some(cli) = CLI_ARGS.get() {
if cli.is_help {
Cli::usage();
return Ok(());
}
let mut active_sessions = Arc::new(Mutex::new(0));
let list_str = Self::listener(cli);
let listener = TcpListener::bind(&list_str)?;
// let listener = TcpListener::bind(&list_str)?;
println!("Listening for connections on {}", list_str);
let prev_stats: Arc<Mutex<BTreeMap<String, (u64, u64)>>> =
Arc::new(Mutex::new(BTreeMap::new()));
{
// let stats_mutex = Arc::clone(&prev_stats);
// let res = stats_mutex.lock();
// if let Ok(mut data) = res {
// Stats::new().render(&mut data)?;
// }
}
let mut incomming = 0;
for stream in listener.incoming() {
match stream {
Ok(stream) => {
incomming += 1;
// dbg!(incomming);
let stats_mutex = Arc::clone(&prev_stats);
let act_session = Arc::clone(&active_sessions);
thread::spawn(move || {
Self::handle_client(&stats_mutex, stream, &act_session);
});
// incomming += 1;
// dbg!(incomming);
// let stats_mutex = Arc::clone(&prev_stats);
// let act_session = Arc::clone(&active_sessions);
// thread::spawn(move || {
// if let Ok(mut data) = stats_mutex.lock() {
// let _unused = Self::handle_client(&mut data, stream, act_session);
// }
// });
}
Err(e) => {
println!("Unable to connect: {}", e);
}
}
}
}
Ok(())
}
fn handle_client(
arc_prev_stats: &Arc<Mutex<BTreeMap<String, (u64, u64)>>>,
// prev_stats: &mut BTreeMap<String, (u64, u64)>,
stream: TcpStream,
arc_act_session: &Arc<Mutex<usize>>,
) {
let now = Instant::now();
let act_session = Arc::clone(arc_act_session);
let opened_sessions = match act_session.try_lock() {
Ok(data) => Some(*data),
Err(_) => {
// dbg!(error);
None
}
};
let response_str = if let Some(sessions) = opened_sessions {
if sessions < MAX_ACTIVE_SESSIONS {
match act_session.try_lock() {
Ok(mut data) => {
// dbg!(*data);
*data += 1;
// dbg!(*data);
}
Err(_) => {
// dbg!(error);
}
};
match Self::handle_read(&stream) {
Ok(res) => res,
Err(_) => {
// dbg!(error);
ServerResponse::new(StatusCode::ServiceUnavailable)
}
}
} else {
ServerResponse::new(StatusCode::ServiceUnavailable)
}
} else {
ServerResponse::new(StatusCode::ServiceUnavailable)
};
match Self::handle_write(arc_prev_stats, stream, response_str, arc_act_session) {
Ok(_) => {
println!(
"Response generated in {} secs. ",
now.elapsed().as_secs_f64(),
);
}
Err(err) => {
println!("Error on sending Reponse. Reason: {err}.",);
}
}
// println!(
// "Active sessions: {:?}. Response generated in {} secs. ",
// opened_sessions,
// now.elapsed().as_secs_f64(),
// );
}
fn handle_read(mut stream: &TcpStream) -> H10LibResult<ServerResponse> {
// TODO
let mut buf = [0u8; Self::CHUNK_SIZE];
match stream.read(&mut buf) {
Ok(bytes) => {
if let Some(cli_data) = CLI_ARGS.get() {
if cli_data.verbose == CliVerboseMode::Enabled {
println!("Request received: {bytes} Bytes.");
}
}
Ok(Endpoint::dispatcher(&buf))
}
Err(err) => {
println!("Unable to read stream: {}", err);
Err(H10LibError::IoError(err))
}
}
}
fn handle_write(
// prev_stats: &mut BTreeMap<String, (u64, u64)>,
arc_prev_stats: &Arc<Mutex<BTreeMap<String, (u64, u64)>>>,
mut stream: TcpStream,
server_response: ServerResponse,
act_session: &Arc<Mutex<usize>>,
) -> H10LibResult<()> {
// let prev_stats = Arc::clone(arc_prev_stats);
match act_session.try_lock() {
Ok(mut data) => {
// dbg!(*data);
*data -= 1;
// dbg!(*data);
}
Err(_) => {
// dbg!(error);
}
};
let statuscode_str = server_response.0.status().to_string();
let response_str = server_response.into_response().to_string();
match stream.write(response_str.as_bytes()) {
Ok(bytes) => {
if let Some(cli_data) = CLI_ARGS.get() {
if cli_data.verbose == CliVerboseMode::Enabled {
println!("Response sent: {bytes} Bytes.");
println!("{response_str}");
} else {
println!("Response sent: {bytes} Bytes. {statuscode_str}");
}
}
}
Err(e) => println!("Failed sending response: {}", e),
}
Ok(())
}
}