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>, key: &str) -> 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     let sep: &[_] = &['\\', '/'];
  57     first_arg[first_arg.rfind(sep).unwrap()+1..].to_string()
  58 }
  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.replace('\n', "").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     let key = read_key();
  76
  77     if process_args(&key) { return Ok(()) }
  78
  79     println!("Starting RUP as web server...");
  80
  81     let config: Config = {
  82         let f = File::open(consts::FILE_CONF).expect(&format!("Failed to open configuration file {}", consts::FILE_CONF));
  83         match from_reader(f) {
  84             Ok(c) => c,
  85             Err(e) => panic!("Failed to load config: {}", e)
  86         }
  87     };
  88
  89     println!("Configuration: {:?}", config);
  90
  91     let mut listenfd = ListenFd::from_env();
  92     let mut server =
  93         HttpServer::new(
  94             move || {
  95                 let key = key.clone(); // Is this neccessary??
  96
  97                 App::new()
  98                     .wrap(middleware::Compress::default())
  99                     .wrap(middleware::Logger::default())
 100                     .service(web::resource("/").to(move |query| main_page(query, &key)))
 101                     .service(fs::Files::new("/static", "static").show_files_listing())
 102             }
 103         );
 104
 105     server =
 106         if let Some(l) = listenfd.take_tcp_listener(0).unwrap() {
 107             server.listen(l).unwrap()
 108         } else {
 109             server.bind(&format!("0.0.0.0:{}", config.port)).unwrap()
 110         };
 111
 112     server.run()
 113 }
 114
 115 fn process_args(key: &String) -> bool {
 116     fn print_usage() {
 117         println!("Usage:");
 118         println!(" {} [--help] [--encrypt <plain-text>|--decrypt <cipher-text>]", get_exe_name());
 119     }
 120
 121     let args: Vec<String> = args().collect();
 122
 123     if args.iter().any(|arg| arg == "--help") {
 124         print_usage();
 125         return true
 126     } else if let Some((position_arg_encrypt, _)) = args.iter().find_position(|arg| arg == &"--encrypt") {
 127         match args.iter().nth(position_arg_encrypt + 1) {
 128             Some(mess_to_encrypt) => {
 129                 match crypto::encrypt(&key, mess_to_encrypt) {
 130                     Ok(encrypted_mess) => {
 131                         let encrypted_mess_encoded = percent_encoding::utf8_percent_encode(&encrypted_mess, percent_encoding::NON_ALPHANUMERIC).to_string();
 132                         println!("Encrypted message percent-encoded: {}", encrypted_mess_encoded); },
 133                     Err(error) =>
 134                         println!("Unable to encrypt: {:?}", error)
 135                 }
 136             }
 137             None => print_usage()
 138         }
 139
 140         return true
 141     } else if let Some((position_arg_decrypt, _)) = args.iter().find_position(|arg| arg == &"--decrypt") {
 142         match args.iter().nth(position_arg_decrypt + 1) {
 143             Some(cipher_text) => {
 144                 let cipher_text_decoded = percent_encoding::percent_decode(cipher_text.as_bytes()).decode_utf8().expect("Unable to decode encoded cipher text");
 145                 match crypto::decrypt(&key, &cipher_text_decoded) {
 146                     Ok(plain_text) =>
 147                         println!("Decrypted message: {}", plain_text),
 148                     Err(error) =>
 149                         println!("Unable to decrypt: {:?}", error)
 150                 }
 151             }
 152             None => print_usage()
 153         }
 154
 155         return true
 156     }
 157
 158     return false
 159 }