tyu_ru_cpp score 40
2019/04/28 21:22 投稿
| プログラミングRust 2.5 簡単なWebサーバのコードが正しく動作しない |
| ### 前提・実現したいこと |
| 今まで積んでた「プログラミングRust」で学習中です |
| 2.5 簡単なWebサーバのコードをコードを実行してみたのですが、ボタンを押しても動作しません |
| 自分はWeb系の人ではないのでgetとかpostとかもよくわかってなく、どこが間違っているのかわからないので質問しました |
| ### 該当のソースコード |
| ```toml |
| [package] |
| name = "iron-gcd" |
| version = "0.1.0" |
| authors = [""] |
| [dependencies] |
| iron = "0.5.1" |
| mime = "0.2.3" |
| router = "0.5.1" |
| urlencoded = "0.5.0" |
| ``` |
| ```rust |
| extern crate iron; |
| #[macro_use] |
| extern crate mime; |
| extern crate router; |
| use iron::prelude::*; |
| use iron::status; |
| use router::Router; |
| extern crate urlencoded; |
| use std::str::FromStr; |
| use urlencoded::UrlEncodedBody; |
| fn main() { |
| let mut router = Router::new(); |
| router.get("/", get_from, "root"); |
| router.post("/gcd", post_gcd, "gcd"); |
| println!("Serving on http://localhost:3000..."); |
| Iron::new(router).http("localhost:3000").unwrap(); |
| } |
| fn get_from(_request: &mut Request) -> IronResult<Response> { |
| let mut response = Response::new(); |
| response.set_mut(status::Ok); |
| response.set_mut(mime!(Text/Html; Charset=Utf8)); |
| response.set_mut( |
| r#" |
| <title>GCD Calculator</title> |
| <from action="/gcd" method="post"> |
| <input type="text" name ="n"/> |
| <input type="text" name ="n"/> |
| <button type="submit">Compute GCD</button> |
| </from>"#, |
| ); |
| Ok(response) |
| } |
| fn post_gcd(request: &mut Request) -> IronResult<Response> { |
| let mut response = Response::new(); |
| let from_data = match request.get_ref::<UrlEncodedBody>() { |
| Err(e) => { |
| response.set_mut(status::BadRequest); |
| response.set_mut(format!("Error parsing from data: {:?}\n", e)); |
| return Ok(response); |
| } |
| Ok(map) => map, |
| }; |
| let unparsed_numbers = match from_data.get("n") { |
| None => { |
| response.set_mut(status::BadRequest); |
| response.set_mut(format!("from data has no 'n' parameter")); |
| return Ok(response); |
| } |
| Some(nums) => nums, |
| }; |
| let mut numbers = Vec::new(); |
| for unparsed in unparsed_numbers { |
| match u64::from_str(&unparsed) { |
| Err(_) => { |
| response.set_mut(status::BadRequest); |
| response.set_mut(format!( |
| "Value for 'n' parameternot a number: {:?}\n", |
| unparsed |
| )); |
| return Ok(response); |
| } |
| Ok(n) => { |
| numbers.push(n); |
| } |
| } |
| } |
| let mut d = numbers[0]; |
| for m in &numbers[1..] { |
| d = gcd(d, *m); |
| } |
| response.set_mut(status::Ok); |
| response.set_mut(mime!(Text/Html; Charset=Utf8)); |
| response.set_mut(format!( |
| "The gratest common divisor of the numbers {:?} is <b>{}</b>\n", |
| numbers, |
| d |
| )); |
| Ok(response) |
| } |
| fn gcd(mut n: u64, mut m: u64) -> u64 { |
| assert!(n != 0 && m != 0); |
| while m != 0 { |
| if m < n { |
| let t = m; |
| m = n; |
| n = t; |
| } |
| m = m % n; |
| } |
| n |
| } |
| #[test] |
| fn test_gcd() { |
| assert_eq!(gcd(14, 15), 1); |
| assert_eq!(gcd(2 * 3 * 5 * 11 * 17, 3 * 7 * 11 * 13 * 19), 3 * 11); |
| } |
| ``` |
| ### 試したこと |
| localhost:3000/gcdにはアクセスできませんでした。 |
| ### 補足情報（FW/ツールのバージョンなど） |
| cargo 0.23.0 (61fa02415 2017-11-22) |
| rustc 1.22.1 (05e2e1c41 2017-11-22) |
| rustdoc 1.22.1 (05e2e1c41 2017-11-22) |
| よろしくおねがいします |
