You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.0 KiB
Rust
91 lines
2.0 KiB
Rust
#![allow(dead_code)]
|
|
|
|
use std::collections::HashMap;
|
|
|
|
struct Request {
|
|
method: String,
|
|
url: String,
|
|
headers: HashMap<String, String>,
|
|
body: Vec<u8>
|
|
}
|
|
|
|
struct Response {
|
|
code: u32,
|
|
headers: HashMap<String, String>,
|
|
body: Vec<u8>
|
|
}
|
|
|
|
type BoxedCallback = Box<dyn Fn(&Request) -> Response>;
|
|
|
|
struct BasicRouter {
|
|
routes: HashMap<String, BoxedCallback>
|
|
}
|
|
|
|
impl BasicRouter {
|
|
// Create an empty router.
|
|
fn new() -> BasicRouter {
|
|
BasicRouter { routes: HashMap::new() }
|
|
}
|
|
|
|
// Add a route to the router.
|
|
fn add_route<C>(&mut self, url: &str, callback: C)
|
|
where C: Fn(&Request) -> Response + 'static
|
|
{
|
|
self.routes.insert(url.to_string(), Box::new(callback));
|
|
}
|
|
}
|
|
|
|
|
|
impl BasicRouter {
|
|
fn handle_request(&self, request: &Request) -> Response {
|
|
match self.routes.get(&request.url) {
|
|
None => not_found_response(),
|
|
Some(callback) => callback(request)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn not_found_response() -> Response {
|
|
Response {
|
|
code: 404,
|
|
headers: HashMap::new(),
|
|
body: b"<h1>Page not found</h1>".to_vec()
|
|
}
|
|
}
|
|
|
|
fn get_form_response() -> Response {
|
|
Response {
|
|
code: 200,
|
|
headers: HashMap::new(),
|
|
body: b"<form>".to_vec()
|
|
}
|
|
}
|
|
|
|
fn get_gcd_response(_req: &Request) -> Response {
|
|
Response {
|
|
code: 500,
|
|
headers: HashMap::new(),
|
|
body: b"<h1>Internal server error</h1>".to_vec()
|
|
}
|
|
}
|
|
|
|
fn req(url: &str) -> Request {
|
|
Request {
|
|
method: "GET".to_string(),
|
|
url: url.to_string(),
|
|
headers: HashMap::new(),
|
|
body: vec![]
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_router() {
|
|
let mut router = BasicRouter::new();
|
|
router.add_route("/", |_| get_form_response());
|
|
router.add_route("/gcd", |req| get_gcd_response(req));
|
|
|
|
assert_eq!(router.handle_request(&req("/piano")).code, 404);
|
|
assert_eq!(router.handle_request(&req("/")).code, 200);
|
|
assert_eq!(router.handle_request(&req("/gcd")).code, 500);
|
|
}
|