src/main.rs

   1 extern crate actix_web;
   2 extern crate listenfd;
   3 extern crate askama;
   4
   5 use listenfd::ListenFd;
   6 use actix_files as fs;
   7 use actix_web::{web, middleware, App, HttpServer, HttpResponse, Responder, Result, web::Query};
   8 use askama::Template;
   9
  10 use std::io::prelude::*;
  11 use ron::de::from_reader;
  12 use serde::Deserialize;
  13 use std::{fs::File, env::args};
  14
  15 use itertools::Itertools;
  16
  17 mod consts;
  18 mod crypto;
  19
  20 #[derive(Template)]
  21 #[template(path = "main.html")]
  22 struct MainTemplate<'a> {
  23     sentence: &'a str,
  24 }
  25
  26 #[derive(Deserialize)]
  27 pub struct Request {
  28    m: Option<String>
  29 }
  30
  31 static DEFAULT_MESSAGE: &str = "Marc, roule un pet'!";
  32 static KEY: &str = "secret";
  33
  34 fn main_page(query: Query<Request>) -> Result<HttpResponse> {
  35     let m =
  36         match &query.m {
  37             Some(b) =>
  38                 match crypto::decrypt(KEY, b) {
  39                     Some(m) => m,
  40                     None => String::from(DEFAULT_MESSAGE)
  41                 },
  42             None => String::from(DEFAULT_MESSAGE)
  43         };
  44
  45     let hello = MainTemplate { sentence: &m };
  46
  47     let s = hello.render().unwrap();
  48     Ok(HttpResponse::Ok().content_type("text/html").body(s))
  49 }
  50
  51 #[derive(Debug, Deserialize)]
  52 struct Config {
  53     port: u16
  54 }
  55
  56 fn get_exe_name() -> String {
  57     let first_arg = std::env::args().nth(0).unwrap();
  58     //dbg!(&first_arg);
  59     let sep: &[_] = &['\\', '/'];
  60     first_arg[first_arg.rfind(sep).unwrap()+1..].to_string()
  61 }
  62
  63 fn print_usage() {
  64     println!("Usage:");
  65     println!(" {} [--help] [--encrypt <plain-text>|--decrypt <cipher-text>]", get_exe_name());
  66 }
  67
  68 fn read_key() -> String {
  69     let mut key = String::new();
  70     File::open(consts::FILE_KEY)
  71         .expect(&format!("Failed to open key file: {}", consts::FILE_KEY))
  72         .read_to_string(&mut key)
  73         .expect(&format!("Failed to read key file: {}", consts::FILE_KEY));
  74
  75     String::from(
  76         url::percent_encoding::percent_decode(key.as_bytes())
  77             .decode_utf8()
  78             .expect(&format!("Failed to decode key file: {}", consts::FILE_KEY))
  79     )
  80 }
  81
  82 fn main() -> std::io::Result<()> {
  83     let args: Vec<String> = args().collect();
  84
  85     let key = read_key();
  86
  87     if args.iter().any(|arg| arg == "--help") {
  88         print_usage();
  89         return Ok(());
  90     } else if let Some((position_arg_encrypt, _)) = args.iter().find_position(|arg| arg == &"--encrypt") {
  91         match args.iter().nth(position_arg_encrypt + 1) {
  92             Some(mess_to_encrypt) => {
  93
  94                 let encrypted_mess = crypto::encrypt(&key, mess_to_encrypt);
  95                 let encrypted_mess_encoded = url::percent_encoding::utf8_percent_encode(&encrypted_mess, url::percent_encoding::DEFAULT_ENCODE_SET).to_string();
  96                 println!("Encrypted message percent-encoded: {}", encrypted_mess_encoded);
  97             }
  98             None => print_usage()
  99         }
 100
 101         return Ok(());
 102     } else if let Some((position_arg_decrypt, _)) = args.iter().find_position(|arg| arg == &"--decrypt") {
 103         match args.iter().nth(position_arg_decrypt + 1) {
 104             Some(cipher_text) => {
 105                 let cipher_text_decoded = url::percent_encoding::percent_decode(cipher_text.as_bytes()).decode_utf8().expect("Unable to decode encoded cipher text");
 106                 let plain_text = crypto::decrypt(&key, &cipher_text_decoded).unwrap();
 107                 println!("Decrypted message: {}", plain_text);
 108             }
 109             None => print_usage()
 110         }
 111
 112         return Ok(());
 113     }
 114
 115     println!("Starting RUP as web server...");
 116
 117     let config: Config = {
 118         let f = File::open(consts::FILE_CONF).expect(&format!("Failed to open configuration file {}", consts::FILE_CONF));
 119         match from_reader(f) {
 120             Ok(c) => c,
 121             Err(e) => panic!("Failed to load config: {}", e)
 122         }
 123     };
 124
 125     println!("Configuration: {:?}", config);
 126
 127     let mut listenfd = ListenFd::from_env();
 128     let mut server =
 129         HttpServer::new(
 130             || {
 131                 App::new()
 132                     .wrap(middleware::Compress::default())
 133                     .wrap(middleware::Logger::default())
 134                     .service(web::resource("/").to(main_page))
 135                     .service(fs::Files::new("/static", "static").show_files_listing())
 136             }
 137         );
 138
 139     server =
 140         if let Some(l) = listenfd.take_tcp_listener(0).unwrap() {
 141             server.listen(l).unwrap()
 142         } else {
 143             server.bind(&format!("0.0.0.0:{}", config.port)).unwrap()
 144         };
 145
 146     server.run()
 147 }