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 <message>]", get_exe_name());
  66 }
  67
  68 fn read_key() -> String {
  69     use url::percent_encoding::percent_decode;
  70     let mut key = String::new();
  71     File::open(consts::FILE_KEY)
  72         .expect(&format!("Failed to open key file: {}", consts::FILE_KEY))
  73         .read_to_string(&mut key)
  74         .expect(&format!("Failed to read key file: {}", consts::FILE_KEY));
  75
  76     String::from(
  77         percent_decode(key.as_bytes())
  78             .decode_utf8()
  79             .expect(&format!("Failed to decode key file: {}", consts::FILE_KEY))
  80     )
  81 }
  82
  83 fn main() -> std::io::Result<()> {
  84     let args: Vec<String> = args().collect();
  85
  86     let key = read_key();
  87
  88     if args.iter().any(|arg| arg == "--help") {
  89         print_usage();
  90         return Ok(());
  91     } else if let Some((position_arg_encrypt, _)) = args.iter().find_position(|arg| arg == &"--encrypt") {
  92         match args.iter().nth(position_arg_encrypt + 1) {
  93             Some(mess_to_encrypt) => {
  94                 let encrypted_mess = crypto::encrypt(&key, mess_to_encrypt);
  95                 println!("Encrypted message: {}", encrypted_mess);
  96             }
  97             None => print_usage()
  98         }
  99
 100         return Ok(());
 101     }
 102
 103     println!("Starting RUP as web server...");
 104
 105     let config: Config = {
 106         let f = File::open(consts::FILE_CONF).expect(&format!("Failed to open configuration file {}", consts::FILE_CONF));
 107         match from_reader(f) {
 108             Ok(c) => c,
 109             Err(e) => panic!("Failed to load config: {}", e)
 110         }
 111     };
 112
 113     println!("Configuration: {:?}", config);
 114
 115     let mut listenfd = ListenFd::from_env();
 116     let mut server =
 117         HttpServer::new(
 118             || {
 119                 App::new()
 120                     .wrap(middleware::Compress::default())
 121                     .wrap(middleware::Logger::default())
 122                     .service(web::resource("/").to(main_page))
 123                     .service(fs::Files::new("/static", "static").show_files_listing())
 124             }
 125         );
 126
 127     server =
 128         if let Some(l) = listenfd.take_tcp_listener(0).unwrap() {
 129             server.listen(l).unwrap()
 130         } else {
 131             server.bind(&format!("0.0.0.0:{}", config.port)).unwrap()
 132         };
 133
 134     server.run()
 135 }