an http based roguelike rpg about jelqing
| 1 | use axum::{ |
| 2 | Json, |
| 3 | http::{HeaderMap, HeaderName, HeaderValue, StatusCode, header}, |
| 4 | response::{IntoResponse, Response}, |
| 5 | }; |
| 6 | use serde_json::{Map, Value, json}; |
| 7 | |
| 8 | pub const PROBLEM_BASE: &str = "https://jelq.dev/problems/"; |
| 9 | |
| 10 | /// An RFC 9457 problem document. |
| 11 | pub struct Problem(Box<Inner>); |
| 12 | |
| 13 | struct Inner { |
| 14 | status: StatusCode, |
| 15 | slug: &'static str, |
| 16 | detail: String, |
| 17 | extensions: Map<String, Value>, |
| 18 | headers: HeaderMap, |
| 19 | } |
| 20 | |
| 21 | impl Problem { |
| 22 | pub fn new(status: StatusCode, slug: &'static str, detail: impl Into<String>) -> Self { |
| 23 | Self(Box::new(Inner { |
| 24 | status, |
| 25 | slug, |
| 26 | detail: detail.into(), |
| 27 | extensions: Map::new(), |
| 28 | headers: HeaderMap::new(), |
| 29 | })) |
| 30 | } |
| 31 | |
| 32 | pub fn with(mut self, key: &str, value: impl Into<Value>) -> Self { |
| 33 | self.0.extensions.insert(key.into(), value.into()); |
| 34 | self |
| 35 | } |
| 36 | |
| 37 | pub fn header(mut self, name: HeaderName, value: impl AsRef<str>) -> Self { |
| 38 | let value = HeaderValue::from_str(value.as_ref()).expect("header values are visible ascii"); |
| 39 | self.0.headers.append(name, value); |
| 40 | self |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | // The http crate still uses the RFC 7231 names for these. |
| 45 | fn title(status: StatusCode) -> &'static str { |
| 46 | match status.as_u16() { |
| 47 | 413 => "Content Too Large", |
| 48 | 422 => "Unprocessable Content", |
| 49 | _ => status.canonical_reason().unwrap_or("Unknown"), |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | impl IntoResponse for Problem { |
| 54 | fn into_response(self) -> Response { |
| 55 | let problem = *self.0; |
| 56 | let mut body = Map::new(); |
| 57 | body.insert( |
| 58 | "type".into(), |
| 59 | json!(format!("{PROBLEM_BASE}{}", problem.slug)), |
| 60 | ); |
| 61 | body.insert("title".into(), json!(title(problem.status))); |
| 62 | body.insert("status".into(), json!(problem.status.as_u16())); |
| 63 | body.insert("detail".into(), json!(problem.detail)); |
| 64 | body.extend(problem.extensions); |
| 65 | |
| 66 | let mut response = (problem.status, Json(body)).into_response(); |
| 67 | let headers = response.headers_mut(); |
| 68 | headers.insert( |
| 69 | header::CONTENT_TYPE, |
| 70 | HeaderValue::from_static("application/problem+json"), |
| 71 | ); |
| 72 | for (name, value) in &problem.headers { |
| 73 | headers.append(name, value.clone()); |
| 74 | } |
| 75 | response |
| 76 | } |
| 77 | } |