src/main.rs

   1 extern crate actix_web;
   2 extern crate listenfd;
   3 extern crate askama;
   4 extern crate percent_encoding;
   5
   6 use listenfd::ListenFd;
   7 use actix_files as fs;
   8 use actix_web::{web, middleware, App, HttpServer, HttpResponse, Responder, Result, web::Query};
   9 use askama::Template;
  10
  11 use std::io::prelude::*;
  12 use ron::de::from_reader;
  13 use serde::Deserialize;
  14 use std::{fs::File, env::args};
  15
  16 use itertools::Itertools;
  17
  18 mod consts;
  19 mod crypto;
  20
  21 #[derive(Template)]
  22 #[template(path = "main.html")]
  23 struct MainTemplate<'a> {
  24     sentence: &'a str,
  25 }
  26
  27 #[derive(Deserialize)]
  28 pub struct Request {
  29    m: Option<String>
  30 }
  31
  32 fn main_page(query: Query<Request>) -> Result<HttpResponse> {
  33     let m =
  34         match &query.m {
  35             Some(b) =>
  36                 match crypto::decrypt(KEY, b) {
  37                     Ok(m) => m,
  38                     Err(_e) => String::from(consts::DEFAULT_MESSAGE) // TODO: log error.
  39                 },
  40             None => String::from(consts::DEFAULT_MESSAGE)
  41         };
  42
  43     let hello = MainTemplate { sentence: &m };
  44
  45     let s = hello.render().unwrap();
  46     Ok(HttpResponse::Ok().content_type("text/html").body(s))
  47 }
  48
  49 #[derive(Debug, Deserialize)]
  50 struct Config {
  51     port: u16
  52 }
  53
  54 fn get_exe_name() -> String {
  55     let first_arg = std::env::args().nth(0).unwrap();
  56     //dbg!(&first_arg);
  57     let sep: &[_] = &['\\', '/'];
  58     first_arg[first_arg.rfind(sep).unwrap()+1..].to_string()
  59 }
  60 fn read_key() -> String {
  61     let mut key = String::new();
  62     File::open(consts::FILE_KEY)
  63         .expect(&format!("Failed to open key file: {}", consts::FILE_KEY))
  64         .read_to_string(&mut key)
  65         .expect(&format!("Failed to read key file: {}", consts::FILE_KEY));
  66
  67     String::from(
  68         percent_encoding::percent_decode(key.as_bytes())
  69             .decode_utf8()
  70             .expect(&format!("Failed to decode key file: {}", consts::FILE_KEY))
  71     )
  72 }
  73
  74 fn main() -> std::io::Result<()> {
  75
  76     let key = read_key();
  77
  78     if process_args(&key) { return Ok(()) }
  79
  80     println!("Starting RUP as web server...");
  81
  82     let config: Config = {
  83         let f = File::open(consts::FILE_CONF).expect(&format!("Failed to open configuration file {}", consts::FILE_CONF));
  84         match from_reader(f) {
  85             Ok(c) => c,
  86             Err(e) => panic!("Failed to load config: {}", e)
  87         }
  88     };
  89
  90     println!("Configuration: {:?}", config);
  91
  92     let mut listenfd = ListenFd::from_env();
  93     let mut server =
  94         HttpServer::new(
  95             || {
  96                 App::new()
  97                     .wrap(middleware::Compress::default())
  98                     .wrap(middleware::Logger::default())
  99                     .service(web::resource("/").to(main_page))
 100                     .service(fs::Files::new("/static", "static").show_files_listing())
 101             }
 102         );
 103
 104     server =
 105         if let Some(l) = listenfd.take_tcp_listener(0).unwrap() {
 106             server.listen(l).unwrap()
 107         } else {
 108             server.bind(&format!("0.0.0.0:{}", config.port)).unwrap()
 109         };
 110
 111     server.run()
 112 }
 113
 114 fn process_args(key: &String) -> bool {
 115     fn print_usage() {
 116         println!("Usage:");
 117         println!(" {} [--help] [--encrypt <plain-text>|--decrypt <cipher-text>]", get_exe_name());
 118     }
 119
 120     let args: Vec<String> = args().collect();
 121
 122     if args.iter().any(|arg| arg == "--help") {
 123         print_usage();
 124         return true
 125     } else if let Some((position_arg_encrypt, _)) = args.iter().find_position(|arg| arg == &"--encrypt") {
 126         match args.iter().nth(position_arg_encrypt + 1) {
 127             Some(mess_to_encrypt) => {
 128                 match crypto::encrypt(&key, mess_to_encrypt) {
 129                     Ok(encrypted_mess) => {
 130                         let encrypted_mess_encoded = percent_encoding::utf8_percent_encode(&encrypted_mess, percent_encoding::NON_ALPHANUMERIC).to_string();
 131                         println!("Encrypted message percent-encoded: {}", encrypted_mess_encoded); },
 132                     Err(error) =>
 133                         println!("Unable to encrypt: {:?}", error)
 134                 }
 135             }
 136             None => print_usage()
 137         }
 138
 139         return true
 140     } else if let Some((position_arg_decrypt, _)) = args.iter().find_position(|arg| arg == &"--decrypt") {
 141         match args.iter().nth(position_arg_decrypt + 1) {
 142             Some(cipher_text) => {
 143                 let cipher_text_decoded = percent_encoding::percent_decode(cipher_text.as_bytes()).decode_utf8().expect("Unable to decode encoded cipher text");
 144                 match crypto::decrypt(&key, &cipher_text_decoded) {
 145                     Ok(plain_text) =>
 146                         println!("Decrypted message: {}", plain_text),
 147                     Err(error) =>
 148                         println!("Unable to decrypt: {:?}", error)
 149                 }
 150             }
 151             None => print_usage()
 152         }
 153
 154         return true
 155     }
 156
 157     return false
 158 }