X-Git-Url: http://git.euphorik.ch/?p=rup.git;a=blobdiff_plain;f=backend%2Fsrc%2Fmain.rs;fp=backend%2Fsrc%2Fmain.rs;h=ddd9b914cdee26c44baf15e51526366fdecdfc7b;hp=0000000000000000000000000000000000000000;hb=3a070ca2a63491b4d714643ae550b09773660c1e;hpb=73da6aae874c3d4efc3093173733c397a878fe06

diff --git a/backend/src/main.rs b/backend/src/main.rs
new file mode 100644
index 0000000..ddd9b91
--- /dev/null
+++ b/backend/src/main.rs
@@ -0,0 +1,184 @@
+
+extern crate listenfd;
+extern crate askama;
+extern crate percent_encoding;
+
+use listenfd::ListenFd;
+use actix_files as fs;
+use actix_web::{ web, middleware, App, HttpServer, HttpResponse, web::Query };
+use askama::Template;
+
+use std::{ fs::File, path::Path, env::args, io::prelude::* };
+use ron::{ de::from_reader, ser::{ to_string_pretty, PrettyConfig } };
+use serde::{ Deserialize, Serialize };
+
+use itertools::Itertools;
+
+mod consts;
+mod crypto;
+
+#[derive(Template)]
+#[template(path = "main.html")]
+struct MainTemplate<'a> {
+    sentence: &'a str,
+}
+
+#[derive(Deserialize)]
+pub struct Request {
+   m: Option<String>
+}
+
+fn main_page(query: Query<Request>, key: &str) -> HttpResponse {
+    let m =
+        match &query.m {
+            Some(b) =>
+                match crypto::decrypt(key, b) {
+                    Ok(m) => m,
+                    Err(_e) => String::from(consts::DEFAULT_MESSAGE) // TODO: log error.
+                },
+            None => String::from(consts::DEFAULT_MESSAGE)
+        };
+
+    let hello = MainTemplate { sentence: &m };
+
+    let s = hello.render().unwrap();
+    HttpResponse::Ok().content_type("text/html").body(s)
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+struct Config {
+    port: u16
+}
+
+const DEFAULT_CONFIG: Config = Config { port: 8082 };
+
+fn get_exe_name() -> String {
+    let first_arg = std::env::args().next().unwrap();
+    let sep: &[_] = &['\\', '/'];
+    first_arg[first_arg.rfind(sep).unwrap()+1..].to_string()
+}
+
+fn load_config() -> Config {
+    // unwrap_or_else(|_| panic!("Failed to open configuration file {}", consts::FILE_CONF));
+    match File::open(consts::FILE_CONF) {
+        Ok(file) => from_reader(file).unwrap_or_else(|_| panic!("Failed to open configuration file {}", consts::FILE_CONF)),
+        Err(_) => {
+            let mut file = File::create(consts::FILE_CONF) .unwrap();
+            file.write_all(to_string_pretty(&DEFAULT_CONFIG, PrettyConfig::new()).unwrap().as_bytes()).unwrap(); // We do not use 'to_writer' because it can't pretty format the output.
+            DEFAULT_CONFIG
+        }
+    }
+}
+
+fn read_key() -> String {
+    let mut key = String::new();
+    File::open(consts::FILE_KEY)
+        .unwrap_or_else(|_| panic!("Failed to open key file: {}", consts::FILE_KEY))
+        .read_to_string(&mut key)
+        .unwrap_or_else(|_| panic!("Failed to read key file: {}", consts::FILE_KEY));
+
+    String::from(
+        percent_encoding::percent_decode(key.replace('\n', "").as_bytes())
+            .decode_utf8()
+            .unwrap_or_else(|_| panic!("Failed to decode key file: {}", consts::FILE_KEY))
+    )
+}
+
+fn write_key(key : &str) {
+    let percent_encoded = percent_encoding::utf8_percent_encode(key, percent_encoding::NON_ALPHANUMERIC).to_string();
+    let mut file = File::create(consts::FILE_KEY).unwrap();
+    file.write_all(percent_encoded.as_bytes()).unwrap();
+}
+
+#[actix_rt::main]
+async fn main() -> std::io::Result<()> {
+    let key = {
+        // If the key file doesn't exist then create a new one with a random key in it.
+        if !Path::new(consts::FILE_KEY).exists() {
+            let new_key = crypto::generate_key();
+            write_key(&new_key);
+            println!("A key has been generated here: {}", consts::FILE_KEY);
+            new_key
+        } else {
+            read_key()
+        }
+    };
+
+    if process_args(&key) { return Ok(()) }
+
+    println!("Starting RUP as web server...");
+
+    let config = load_config();
+
+    println!("Configuration: {:?}", config);
+
+    let mut listenfd = ListenFd::from_env();
+    let mut server =
+        HttpServer::new(
+            move || {
+                let key = key.clone(); // Is this neccessary??
+
+                App::new()
+                    .wrap(middleware::Compress::default())
+                    .wrap(middleware::Logger::default())
+                    .service(web::resource("/").to(move |query| main_page(query, &key)))
+                    .service(fs::Files::new("/static", "static").show_files_listing())
+            }
+        );
+
+    server =
+        if let Some(l) = listenfd.take_tcp_listener(0).unwrap() {
+            server.listen(l).unwrap()
+        } else {
+            server.bind(&format!("0.0.0.0:{}", config.port)).unwrap()
+        };
+
+    server.run().await
+}
+
+fn process_args(key: &str) -> bool {
+    fn print_usage() {
+        println!("Usage:");
+        println!(" {} [--help] [--encrypt <plain-text> | --decrypt <cipher-text>]", get_exe_name());
+    }
+
+    let args: Vec<String> = args().collect();
+
+    if args.iter().any(|arg| arg == "--help") {
+        print_usage();
+        return true
+    } else if let Some((position_arg_encrypt, _)) = args.iter().find_position(|arg| arg == &"--encrypt") {
+        match args.get(position_arg_encrypt + 1) {
+            Some(mess_to_encrypt) => {
+                // Encrypt to version 2 (version 1 is obsolete).
+                match crypto::encrypt(&key, mess_to_encrypt, 2) {
+                    Ok(encrypted_mess) => {
+                        let encrypted_mess_encoded = percent_encoding::utf8_percent_encode(&encrypted_mess, percent_encoding::NON_ALPHANUMERIC).to_string();
+                        println!("Encrypted message percent-encoded: {}", encrypted_mess_encoded); },
+                    Err(error) =>
+                        println!("Unable to encrypt: {:?}", error)
+                }
+            }
+            None => print_usage()
+        }
+
+        return true
+    } else if let Some((position_arg_decrypt, _)) = args.iter().find_position(|arg| arg == &"--decrypt") {
+        match args.get(position_arg_decrypt + 1) {
+            Some(cipher_text) => {
+                let cipher_text_decoded = percent_encoding::percent_decode(cipher_text.as_bytes()).decode_utf8().expect("Unable to decode encoded cipher text");
+                match crypto::decrypt(&key, &cipher_text_decoded) {
+                    Ok(plain_text) =>
+                        println!("Decrypted message: {}", plain_text),
+                    Err(error) =>
+                        println!("Unable to decrypt: {:?}", error)
+                }
+            }
+            None => print_usage()
+        }
+
+        return true
+    }
+
+    false
+}