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{ version = "1.44.2", features = ["full"] } diff --git a/README.md b/README.md new file mode 100644 index 0000000..4c6b3b3 --- /dev/null +++ b/README.md @@ -0,0 +1,6 @@ +To launch the application, you can use the following commands in your terminal, assuming you have Rust and Cargo installed, in separate terminal windows: + +```bash +cargo run -- -i 8001 -o 8000 +cargo run -- -i 8000 -o 8001 +``` diff --git a/src/http.rs b/src/http.rs new file mode 100644 index 0000000..1aafbbb --- /dev/null +++ b/src/http.rs @@ -0,0 +1,36 @@ +use std::collections::HashMap; +use std::path::PathBuf; + +pub enum HttpError { + NotFound, + MethodNotAllowed, + InternalServerError, +} + +#[derive(Debug)] +pub enum HttpMethod { + GET, + POST, + PUT, + PATCH, + DELETE, +} + +#[derive(Debug)] +pub struct HttpRequest { + pub method: HttpMethod, + pub uri: PathBuf, + pub headers: HashMap, + pub body: Vec, +} + +pub fn parse_method(s: &str) -> Result { + match s { + "GET" => Ok(HttpMethod::GET), + "POST" => Ok(HttpMethod::POST), + "PUT" => Ok(HttpMethod::PUT), + "PATCH" => Ok(HttpMethod::PATCH), + "DELETE" => Ok(HttpMethod::DELETE), + _ => Err(HttpError::MethodNotAllowed), + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..710eb1e --- /dev/null +++ b/src/main.rs @@ -0,0 +1,34 @@ +mod http; +mod schemas; +mod server; +mod state_sync; + +use clap::Parser; +use schemas::{Args, State}; +use server::HttpServer; +use state_sync::state_sync_loop; +use std::error::Error; +use std::sync::Arc; +use std::sync::Mutex; +use std::thread; + +fn main() -> Result<(), Box> { + let state = Arc::new(Mutex::new(State::new())); + + let ports = Args::parse(); + + if ports.in_port == ports.out_port { + panic!("Ports should not be equal!") + } + + let server_handle = thread::spawn(move || { + let server = HttpServer::new(&ports.in_port); + server.listen(&state); + }); + + let state_federator_handle = thread::spawn(move || state_sync_loop(ports.clone())); + + server_handle.join().unwrap(); + state_federator_handle.join().unwrap(); + Ok(()) +} diff --git a/src/schemas.rs b/src/schemas.rs new file mode 100644 index 0000000..05af069 --- /dev/null +++ b/src/schemas.rs @@ -0,0 +1,40 @@ +use clap::{Parser, command}; + +use serde::{Deserialize, Serialize}; + +#[derive(Parser, Clone)] +#[command(version, about, long_about = None)] +pub struct Args { + /// Port in + #[arg(short, long)] + pub in_port: u32, + + /// Port out + #[arg(short, long)] + pub out_port: u32, +} + +#[derive(Deserialize, Debug)] +pub struct CeremonyArtifacts { + shares_count: u32, + threshold: u32, +} + +pub struct ShamirKey { + value: String, + origin: String, +} + +pub struct State { + keys: Vec, + updated_at: String, +} + +impl State { + pub fn new() -> Self { + Self { + updated_at: String::from("init"), + keys: Vec::new(), + } + } +} diff --git a/src/server.rs b/src/server.rs new file mode 100644 index 0000000..2740610 --- /dev/null +++ b/src/server.rs @@ -0,0 +1,123 @@ +use crate::http; +use crate::schemas; + +use clap::Parser; +use http::{HttpError, HttpMethod, HttpRequest, parse_method}; +use schemas::{Args, State}; +use std::error::Error; +use std::sync::Mutex; +use std::thread; +use std::{ + collections::HashMap, + io::{BufReader, prelude::*}, + net::{TcpListener, TcpStream}, + sync::Arc, +}; +use std::{path::PathBuf, str::FromStr}; + +type AppState = Arc>; + +fn parse_http_request(mut buf: BufReader<&TcpStream>) -> Result { + let mut request_method: Option = None; + let mut uri: Option = None; + let mut headers: Vec = Vec::new(); + let mut header_map: HashMap = HashMap::new(); + let mut method_line: String = String::new(); + + for (i, line_result) in buf.by_ref().lines().enumerate() { + let line = line_result.unwrap(); + if i == 0 { + method_line.push_str(&line); + let http_args = method_line.split(" ").collect::>(); + if http_args.len() == 3 { + match parse_method(http_args[0]) { + Ok(m) => request_method = Some(m), + Err(e) => return Err(e), + } + match PathBuf::from_str(http_args[1]) { + Ok(b) => uri = Some(b), + Err(_) => return Err(HttpError::InternalServerError), + } + } else { + return Err(HttpError::InternalServerError); + } + } + if line.is_empty() { + break; + } + headers.push(line.clone()); + if let Some((key, value)) = line.split_once(": ") { + header_map.insert(key.to_string().to_lowercase(), value.to_string()); + } + } + + let conten_length = header_map + .get("content-length") + .and_then(|v| v.parse::().ok()) + .unwrap_or(0); + + println!("Content length: {conten_length:?}"); + + let mut body: Vec = vec![0 as u8; conten_length]; + let res = match buf.read_exact(&mut body) { + Ok(_) => body, + Err(_) => return Err(HttpError::InternalServerError), + }; + + if uri.is_none() || request_method.is_none() { + return Err(HttpError::InternalServerError); + } + + Ok(HttpRequest { + method: request_method.unwrap(), + uri: uri.unwrap(), + headers: header_map, + body: res, + }) +} + +fn dispatch_connection(mut stream: TcpStream, state: &AppState) -> Result<(), HttpError> { + loop { + let buf_reader = BufReader::new(&stream); + match parse_http_request(buf_reader) { + Ok(request) => { + println!("Request: {:?}", &request); + + if request.uri == PathBuf::from("/healthcheck") { + } else { + } + + let response = "HTTP/1.1 200 OK\r\nContent-length: 0\r\n\r\n"; + + stream.write_all(response.as_bytes()).unwrap(); + } + Err(_) => { + println!("Closing connection due to error or client disconnect."); + break; + } + } + } + Ok(()) +} + +pub struct HttpServer { + listener: TcpListener, +} + +impl HttpServer { + pub fn new(port: &u32) -> Self { + Self { + listener: TcpListener::bind(format!("[::]:{}", port)).unwrap(), + } + } + + pub fn listen(&self, state: &AppState) { + println!("Listening on port 7878"); + + for stream in self.listener.incoming() { + let stream = stream.unwrap(); + + let _ = dispatch_connection(stream, &state); + } + } +} diff --git a/src/state_sync.rs b/src/state_sync.rs new file mode 100644 index 0000000..8de2ee9 --- /dev/null +++ b/src/state_sync.rs @@ -0,0 +1,36 @@ +use crate::schemas::Args; + +use std::io::{Read, Write}; +use std::net::TcpStream; +use std::thread; +use std::time::Duration; + +pub fn state_sync_loop(ports: Args) { + loop { + thread::sleep(Duration::from_secs(5)); + let server_address = format!("127.0.0.1:{}", &ports.out_port); + + // Attempt to connect to the server + + match TcpStream::connect(&server_address) { + Ok(mut stream) => { + println!("Connected to the server at {}", &server_address); + loop { + println!("Performing healthcheck..."); + thread::sleep(Duration::from_secs(1)); + let message = "GET /healthcheck HTTP/1.1\r\nContent-length: 0\r\n\r\n"; + stream.write_all(message.as_bytes()).unwrap(); + + let mut buffer = [0; 256]; // Create a buffer to store the response + let bytes_read = stream.read(&mut buffer).unwrap(); // Read data from the server into the buffer + let response = String::from_utf8_lossy(&buffer[..bytes_read]); // Convert the buffer to a string + println!("Received response: {}", response); + println!("Retry in 1 sec..."); + } + } + Err(_) => { + println!("Port is not online! Will retry in 5 sec...") + } + } + } +}