commit 2f1a435dda702f66b9fe5aed01f21bfa7a833cae
Author: MeexReay <meexreay@gmail.com>
Date:   Thu Jun 6 00:28:16 2024 +0300

    init commit

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..cebaa88
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "http_rrs"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+openssl = { version = "0.10.64", features = ["vendored"] }
+yaml-rust = "0.4.5"
+log = "0.4.21"
+log4rs = "1.3.0"
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f3af232
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+# HttpRRS
+HTTP request redirection system
+
+Default `conf.yml`:
+```yml
+http_host: localhost:80
+https_host: localhost:443
+
+sites:
+  # - domain: example.com                            # Domain with SSL
+  #   host: localhost:8080
+  #   ssl_cert: "/path/to/public/certificate.txt"
+  #   ssl_key: "/path/to/private/key.txt"
+
+  # - domain: sub.example.com                        # Domain with no SSL
+  #   host: localhost:8081
+
+  - domain: localhost
+    host: localhost:8080
+```
+
+## How it works
+
+This works as a proxy that redirects based on the Host header
+
+![explaination.png](explaination.png)
diff --git a/conf.yml b/conf.yml
new file mode 100644
index 0000000..7005125
--- /dev/null
+++ b/conf.yml
@@ -0,0 +1,14 @@
+http_host: localhost:80
+https_host: localhost:443
+
+sites:
+  # - domain: example.com                            # Domain with SSL
+  #   host: localhost:8080
+  #   ssl_cert: "/path/to/public/certificate.txt"
+  #   ssl_key: "/path/to/private/key.txt"
+
+  # - domain: sub.example.com                        # Domain with no SSL
+  #   host: localhost:8081
+
+  - domain: localhost
+    host: localhost:8080
diff --git a/explaination.png b/explaination.png
new file mode 100644
index 0000000..217957e
Binary files /dev/null and b/explaination.png differ
diff --git a/src/http_server.rs b/src/http_server.rs
new file mode 100644
index 0000000..3ea23c6
--- /dev/null
+++ b/src/http_server.rs
@@ -0,0 +1,590 @@
+use http_rrs::ThreadPool;
+use log::{debug, info, warn};
+use openssl::ssl::{
+    NameType, SniError, SslAcceptor, SslAlert, SslContext, SslFiletype, SslMethod, SslRef,
+    SslStream,
+};
+use std::time::Duration;
+use std::{
+    io::{Read, Write},
+    net::{IpAddr, Shutdown, TcpListener, TcpStream},
+    sync::Arc,
+    thread,
+};
+
+#[derive(Clone)]
+pub struct SslCert {
+    pub cert_file: String,
+    pub key_file: String,
+    pub ctx_index: u8,
+    pub ctx: Option<SslContext>,
+}
+
+impl SslCert {
+    pub fn generate_ctx(cert_file: &str, key_file: &str) -> Option<SslContext> {
+        let mut ctx = match SslContext::builder(SslMethod::tls()) {
+            Ok(i) => i,
+            Err(_) => return None,
+        };
+        match ctx.set_private_key_file(&key_file, SslFiletype::PEM) {
+            Ok(i) => i,
+            Err(_) => return None,
+        };
+        match ctx.set_certificate_file(&cert_file, SslFiletype::PEM) {
+            Ok(i) => i,
+            Err(_) => return None,
+        };
+        match ctx.check_private_key() {
+            Ok(i) => i,
+            Err(_) => return None,
+        };
+        Some(ctx.build())
+    }
+
+    pub fn new(cert_file: &str, key_file: &str) -> Option<SslCert> {
+        let ctx = match Self::generate_ctx(cert_file, key_file) {
+            Some(i) => Some(i),
+            None => {
+                return None;
+            }
+        };
+
+        Some(SslCert {
+            ctx: ctx,
+            cert_file: cert_file.to_string(),
+            key_file: key_file.to_string(),
+            ctx_index: 0,
+        })
+    }
+
+    pub fn get_ctx(&mut self) -> Option<&SslContext> {
+        // self.ctx_index += 1;
+        // if self.ctx_index > 5 {
+        //     self.ctx_index = 0;
+        //     self.ctx = Self::generate_ctx(&self.cert_file, &self.key_file);
+        // }
+        self.ctx.as_ref()
+    }
+}
+
+#[derive(Clone)]
+pub struct Site {
+    pub domain: String,
+    pub host: String,
+    pub ssl: Option<SslCert>,
+}
+
+impl Site {
+    fn connect(self) -> Result<TcpStream, String> {
+        match TcpStream::connect(self.host) {
+            Ok(i) => Ok(i),
+            Err(_) => Err("server not canacting".to_string()),
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct SiteServer {
+    host: String,
+    sites: Arc<Vec<Site>>,
+}
+
+fn split_once<'a>(in_string: &'a str, separator: &str) -> Result<(&'a str, &'a str), String> {
+    let mut splitter = in_string.splitn(2, &separator);
+    let first = match splitter.next() {
+        Some(i) => i,
+        None => return Err("first split nat foined".to_string()),
+    };
+    let second = match splitter.next() {
+        Some(i) => i,
+        None => return Err("escond split nat foined".to_string()),
+    };
+    Ok((first, second))
+}
+
+fn get_site(sites: &Vec<Site>, domain: &str) -> Option<Site> {
+    for i in sites.iter() {
+        if i.domain == domain {
+            return Some(i.clone());
+        }
+    }
+    return None;
+}
+
+impl SiteServer {
+    pub fn new<'a>(host: String, sites: Arc<Vec<Site>>) -> Self {
+        SiteServer { host, sites }
+    }
+
+    fn get_site(self, domain: &str) -> Option<Site> {
+        return get_site(&self.sites, domain);
+    }
+}
+
+impl SiteServer {
+    pub fn start_http(self) {
+        thread::spawn(move || {
+            self.run_http();
+        });
+    }
+
+    pub fn run_http(self) {
+        let listener: TcpListener = match TcpListener::bind(&self.host) {
+            Ok(i) => i,
+            Err(_) => {
+                info!("Http server listener bind error");
+                return;
+            }
+        };
+        let pool = ThreadPool::new(10);
+
+        info!("HTTP server runned on {}", &self.host);
+
+        for stream in listener.incoming() {
+            let local_self = self.clone();
+
+            pool.execute(move || {
+                let mut stream = match stream {
+                    Ok(i) => i,
+                    Err(e) => {
+                        warn!("{}", e);
+                        return;
+                    }
+                };
+
+                match stream.set_write_timeout(Some(Duration::from_secs(10))) {
+                    Ok(i) => i,
+                    Err(_) => {
+                        return;
+                    }
+                };
+                match stream.set_read_timeout(Some(Duration::from_secs(10))) {
+                    Ok(i) => i,
+                    Err(_) => {
+                        return;
+                    }
+                };
+
+                let addr = stream.peer_addr();
+
+                match local_self.accept_http(
+                    &mut stream,
+                    match addr {
+                        Ok(v) => v,
+                        Err(_) => {
+                            return;
+                        }
+                    },
+                ) {
+                    Ok(v) => {
+                        let (addr, method, host, page) = v;
+                        info!("{} > {} http://{}{}", addr, method, host, page);
+                    }
+                    Err(_) => {}
+                }
+            });
+        }
+    }
+
+    pub fn run_ssl(self) {
+        let listener: TcpListener = match TcpListener::bind(&self.host) {
+            Ok(i) => i,
+            Err(_) => {
+                info!("Ssl server listener bind error");
+                return;
+            }
+        };
+
+        let mut cert = match SslAcceptor::mozilla_intermediate(SslMethod::tls()) {
+            Ok(v) => v,
+            Err(_) => {
+                info!("Ssl acceptor create error");
+                return;
+            }
+        };
+
+        let sites = self.clone().sites.clone();
+
+        cert.set_servername_callback(Box::new(
+            move |_ssl: &mut SslRef, _alert: &mut SslAlert| -> Result<(), SniError> {
+                debug!("hangs");
+                let servname = match _ssl.servername(NameType::HOST_NAME) {
+                    Some(i) => i,
+                    None => return Err(SniError::NOACK),
+                };
+                let cert = match get_site(&sites, servname) {
+                    Some(i) => i,
+                    None => return Err(SniError::NOACK),
+                };
+                match _ssl.set_ssl_context(
+                    match match cert.ssl {
+                        Some(i) => i,
+                        None => return Err(SniError::NOACK),
+                    }
+                    .get_ctx()
+                    {
+                        Some(k) => k,
+                        None => return Err(SniError::NOACK),
+                    },
+                ) {
+                    Ok(i) => i,
+                    Err(_) => return Err(SniError::NOACK),
+                };
+                return Ok(());
+            },
+        ));
+
+        let cert = cert.build();
+
+        let pool = ThreadPool::new(10);
+
+        info!("HTTPS server runned on {}", &self.host);
+
+        for stream in listener.incoming() {
+            let local_self = self.clone();
+            let local_cert = cert.clone();
+
+            pool.execute(move || {
+                let stream = match stream {
+                    Ok(i) => {
+                        debug!("norm esy");
+                        i
+                    }
+                    Err(_) => {
+                        return;
+                    }
+                };
+
+                match stream.set_write_timeout(Some(Duration::from_secs(10))) {
+                    Ok(i) => i,
+                    Err(_) => {
+                        return;
+                    }
+                };
+                match stream.set_read_timeout(Some(Duration::from_secs(10))) {
+                    Ok(i) => i,
+                    Err(_) => {
+                        return;
+                    }
+                };
+
+                let addr = stream.peer_addr();
+
+                let mut stream = match local_cert.accept(stream) {
+                    Ok(st) => {
+                        debug!("ssl esy");
+                        st
+                    }
+                    Err(_) => {
+                        return;
+                    }
+                };
+
+                match local_self.accept_ssl(
+                    &mut stream,
+                    match addr {
+                        Ok(v) => v,
+                        Err(_) => {
+                            return;
+                        }
+                    },
+                ) {
+                    Ok(v) => {
+                        let (addr, method, host, page) = v;
+                        info!("{} > {} https://{}{}", addr, method, host, page);
+                    }
+                    Err(_) => {}
+                }
+            });
+        }
+    }
+
+    pub fn accept_http(
+        self,
+        stream: &mut TcpStream,
+        peer_addr: std::net::SocketAddr,
+    ) -> Result<(String, String, String, String), ()> {
+        let octets = match peer_addr.ip() {
+            IpAddr::V4(ip) => ip.octets(),
+            _ => [127, 0, 0, 1],
+        };
+
+        let dot: String = String::from(".");
+        let ip_str = String::from(
+            octets[0].to_string()
+                + &dot
+                + &octets[1].to_string()
+                + &dot
+                + &octets[2].to_string()
+                + &dot
+                + &octets[3].to_string(),
+        );
+
+        println!("{}", &ip_str);
+
+        let addition: String = ip_str.clone() + ":" + peer_addr.port().to_string().as_str() + "\n";
+
+        let mut reqst_data: Vec<u8> = vec![0; 4096];
+
+        match stream.read(&mut reqst_data) {
+            Ok(i) => i,
+            Err(_) => return Err(()),
+        };
+
+        let reqst = match String::from_utf8(reqst_data) {
+            Ok(v) => v,
+            Err(_) => {
+                return Err(());
+            }
+        };
+        let reqst = reqst.trim_matches(char::from(0));
+
+        let (head, body) = match split_once(&reqst, "\r\n\r\n") {
+            Ok(i) => i,
+            Err(_) => return Err(()),
+        };
+
+        let mut head_lines = head.split("\r\n");
+
+        let status = match head_lines.next() {
+            Some(i) => i,
+            None => return Err(()),
+        };
+        let status: Vec<&str> = status.split(" ").collect();
+
+        let mut host: &str = "honk";
+        let mut content_length: usize = 0;
+
+        for l in head_lines {
+            let (key, value) = match split_once(&l, ": ") {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+            let key = key.to_lowercase().replace("-", "_");
+
+            if key == "host" {
+                host = &value;
+            }
+            if key == "content_length" {
+                content_length = match value.parse() {
+                    Ok(i) => i,
+                    Err(_) => {
+                        return Err(());
+                    }
+                };
+            }
+        }
+
+        let site = self.get_site(host);
+
+        if site.is_none() {
+            return Err(());
+        }
+
+        let site = match site {
+            Some(i) => i,
+            None => return Err(()),
+        };
+        let mut site_stream = match site.connect() {
+            Ok(i) => i,
+            Err(_) => return Err(()),
+        };
+
+        match site_stream.write((addition + reqst).as_bytes()) {
+            Ok(i) => i,
+            Err(_) => {
+                return Err(());
+            }
+        };
+
+        let body_len = body.len();
+        if body_len < content_length {
+            let mut body_data: Vec<u8> = vec![0; content_length - body_len];
+            match stream.read_exact(&mut body_data) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+            match site_stream.write_all(&body_data) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+        }
+
+        loop {
+            let mut buf: Vec<u8> = Vec::new();
+            match site_stream.read_to_end(&mut buf) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+            if buf.is_empty() {
+                break;
+            }
+            match stream.write_all(&buf) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+        }
+
+        let method = status[0];
+        let page = status[1];
+
+        match site_stream.shutdown(Shutdown::Both) {
+            Ok(i) => i,
+            Err(_) => {
+                return Err(());
+            }
+        };
+
+        Ok((
+            ip_str.clone(),
+            method.to_string().clone(),
+            host.to_string().clone(),
+            page.to_string().clone(),
+        ))
+    }
+
+    pub fn accept_ssl(
+        self,
+        stream: &mut SslStream<TcpStream>,
+        peer_addr: std::net::SocketAddr,
+    ) -> Result<(String, String, String, String), ()> {
+        let octets = match peer_addr.ip() {
+            IpAddr::V4(ip) => ip.octets(),
+            _ => [127, 0, 0, 1],
+        };
+
+        let dot: String = String::from(".");
+        let ip_str = String::from(
+            octets[0].to_string()
+                + &dot
+                + &octets[1].to_string()
+                + &dot
+                + &octets[2].to_string()
+                + &dot
+                + &octets[3].to_string(),
+        );
+
+        let addition: String = ip_str.clone() + ":" + peer_addr.port().to_string().as_str() + "\n";
+
+        let mut reqst_data: Vec<u8> = vec![0; 4096];
+
+        match stream.read(&mut reqst_data) {
+            Ok(i) => i,
+            Err(_) => return Err(()),
+        };
+
+        let reqst = match String::from_utf8(reqst_data) {
+            Ok(v) => v,
+            Err(_) => {
+                return Err(());
+            }
+        };
+        let reqst = reqst.trim_matches(char::from(0));
+
+        let (head, body) = match split_once(&reqst, "\r\n\r\n") {
+            Ok(i) => i,
+            Err(_) => return Err(()),
+        };
+
+        let mut head_lines = head.split("\r\n");
+
+        let status = match head_lines.next() {
+            Some(i) => i,
+            None => return Err(()),
+        };
+        let status: Vec<&str> = status.split(" ").collect();
+
+        let mut host: &str = "honk";
+        let mut content_length: usize = 0;
+
+        for l in head_lines {
+            let (key, value) = match split_once(&l, ": ") {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+            let key = key.to_lowercase().replace("-", "_");
+
+            if key == "host" {
+                host = &value;
+            }
+            if key == "content_length" {
+                content_length = match value.parse() {
+                    Ok(i) => i,
+                    Err(_) => {
+                        return Err(());
+                    }
+                };
+            }
+        }
+
+        let site = self.get_site(host);
+
+        if site.is_none() {
+            return Err(());
+        }
+
+        let site = match site {
+            Some(i) => i,
+            None => return Err(()),
+        };
+        let mut site_stream = match site.connect() {
+            Ok(i) => i,
+            Err(_) => return Err(()),
+        };
+
+        match site_stream.write((addition + reqst).as_bytes()) {
+            Ok(i) => i,
+            Err(_) => {
+                return Err(());
+            }
+        };
+
+        let body_len = body.len();
+        if body_len < content_length {
+            let mut body_data: Vec<u8> = vec![0; content_length - body_len];
+            match stream.read_exact(&mut body_data) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+            match site_stream.write_all(&body_data) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+        }
+
+        loop {
+            let mut buf: Vec<u8> = Vec::new();
+            match site_stream.read_to_end(&mut buf) {
+                Ok(i) => i,
+                Err(_) => return Err(()),
+            };
+            if buf.is_empty() {
+                break;
+            }
+            match stream.write_all(&buf) {
+                Ok(i) => i,
+                Err(e) => {
+                    info!("{}", e);
+                    return Err(());
+                }
+            };
+        }
+
+        let method = status[0];
+        let page = status[1];
+
+        match site_stream.shutdown(Shutdown::Both) {
+            Ok(i) => i,
+            Err(_) => {
+                return Err(());
+            }
+        };
+
+        Ok((
+            ip_str.clone(),
+            method.to_string().clone(),
+            host.to_string().clone(),
+            page.to_string().clone(),
+        ))
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..0c06c61
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,71 @@
+use std::{
+    sync::{mpsc, Arc, Mutex},
+    thread,
+};
+
+type Job = Box<dyn FnOnce() + Send + 'static>;
+
+pub struct ThreadPool {
+    workers: Vec<Worker>,
+    sender: mpsc::Sender<Job>,
+}
+
+pub enum PoolCreationError {
+    InvalidSize,
+}
+
+impl ThreadPool {
+    pub fn new(size: usize) -> ThreadPool {
+        assert!(size > 0);
+
+        let (sender, receiver) = mpsc::channel();
+        let receiver = Arc::new(Mutex::new(receiver));
+
+        let mut workers = Vec::with_capacity(size);
+
+        for _ in 0..size {
+            workers.push(Worker::new(Arc::clone(&receiver)));
+        }
+
+        ThreadPool { workers, sender }
+    }
+
+    pub fn build(size: usize) -> Result<ThreadPool, PoolCreationError> {
+        if size <= 0 {
+            Err(PoolCreationError::InvalidSize)
+        } else {
+            Ok(Self::new(size))
+        }
+    }
+
+    pub fn join(self) {
+        for ele in self.workers.into_iter() {
+            ele.thread.join().unwrap();
+        }
+    }
+
+    pub fn execute<F>(&self, f: F)
+    where
+        F: FnOnce() + Send + 'static,
+    {
+        let job = Box::new(f);
+
+        self.sender.send(job).unwrap();
+    }
+}
+
+struct Worker {
+    thread: thread::JoinHandle<()>,
+}
+
+impl Worker {
+    fn new(receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker {
+        let thread = thread::spawn(move || {
+            while let Ok(job) = receiver.lock().unwrap().recv() {
+                job();
+            }
+        });
+
+        Worker { thread }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..810b793
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,116 @@
+pub mod http_server;
+extern crate yaml_rust;
+
+use http_server::*;
+use std::sync::Arc;
+use std::{fs, thread};
+use yaml_rust::YamlLoader;
+
+use log::LevelFilter;
+use log4rs::append::console::ConsoleAppender;
+use log4rs::append::file::FileAppender;
+use log4rs::config::{Appender, Config, Root};
+use log4rs::encode::pattern::PatternEncoder;
+
+struct AppConfig {
+    sites: Vec<Site>,
+    http_host: String,
+    https_host: String,
+}
+
+impl AppConfig {
+    fn parse(filename: &str) -> Option<AppConfig> {
+        let Ok(file_content) = fs::read_to_string(filename) else {
+            return None;
+        };
+        let Ok(docs) = YamlLoader::load_from_str(file_content.as_str()) else {
+            return None;
+        };
+        let doc = docs.get(0)?;
+
+        let http_host = doc["http_host"].as_str()?.to_string();
+        let https_host = doc["https_host"].as_str()?.to_string();
+
+        let mut sites: Vec<Site> = Vec::new();
+
+        let sites_yaml = doc["sites"].as_vec()?;
+
+        for s in sites_yaml {
+            let mut cert: Option<SslCert> = None;
+
+            if !s["ssl_cert"].is_badvalue() && !s["ssl_cert"].is_null() {
+                cert = Some(
+                    SslCert::new(
+                        s["ssl_cert"].as_str().unwrap(),
+                        s["ssl_key"].as_str().unwrap(),
+                    )
+                    .unwrap(),
+                );
+            }
+
+            let site = Site {
+                domain: s["domain"].as_str().unwrap().to_string(),
+                host: s["host"].as_str().unwrap().to_string(),
+                ssl: cert,
+            };
+
+            sites.push(site);
+        }
+
+        Some(AppConfig {
+            sites,
+            http_host,
+            https_host,
+        })
+    }
+}
+
+fn main() {
+    log4rs::init_config(
+        Config::builder()
+            .appender(
+                Appender::builder().build(
+                    "logfile",
+                    Box::new(
+                        FileAppender::builder()
+                            .encoder(Box::new(PatternEncoder::new(
+                                "{d(%Y-%m-%d %H:%M:%S)} | {l} - {m}\n",
+                            )))
+                            .build("latest.log")
+                            .unwrap(),
+                    ),
+                ),
+            )
+            .appender(
+                Appender::builder().build(
+                    "stdout",
+                    Box::new(
+                        ConsoleAppender::builder()
+                            .encoder(Box::new(PatternEncoder::new(
+                                "{d(%Y-%m-%d %H:%M:%S)} | {l} - {m}\n",
+                            )))
+                            .build(),
+                    ),
+                ),
+            )
+            .build(
+                Root::builder()
+                    .appender("logfile")
+                    .appender("stdout")
+                    .build(LevelFilter::Debug),
+            )
+            .unwrap(),
+    )
+    .unwrap();
+
+    let config = AppConfig::parse("conf.yml").unwrap();
+    let sites_arc = Arc::new(config.sites);
+
+    let sites = sites_arc.clone();
+    thread::spawn(move || {
+        SiteServer::new(config.http_host.to_string(), sites).run_http();
+    });
+
+    let sites = sites_arc.clone();
+    SiteServer::new(config.https_host.to_string(), sites).run_ssl();
+}