Created
December 24, 2018 16:28
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using closure as callback
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use std::collections::HashMap; | |
fn main() { | |
let mut router = BasicRouter::new(); | |
router.add_route("/", |req| Response { | |
code: 200, | |
headers: req.headers.clone(), | |
body: vec![1, 2, 3, 4, 5], | |
}); | |
router.add_route("/rust/doc", |_| Response { | |
code: 200, | |
headers: HashMap::new(), | |
body: vec![80, 127, 23], | |
}); | |
let res1 = router.handle_route(&Request { | |
method: "Get".to_owned(), | |
url: "/".to_owned(), | |
headers: HashMap::new(), | |
body: vec![], | |
}); | |
let res2 = router.handle_route(&Request { | |
method: "Get".to_owned(), | |
url: "/rust/doc".to_owned(), | |
headers: HashMap::new(), | |
body: vec![], | |
}); | |
println!(" res1 : {:?} \n res2: {:?}", res1, res2); | |
} | |
#[derive(Debug)] | |
struct Request { | |
method: String, | |
url: String, | |
headers: HashMap<String, String>, | |
body: Vec<u8>, | |
} | |
#[derive(Debug)] | |
struct Response { | |
code: u32, | |
headers: HashMap<String, String>, | |
body: Vec<u8>, | |
} | |
type RequestHandler = Box<Fn(&Request) -> Response>; | |
struct BasicRouter { | |
routes: HashMap<String, RequestHandler>, | |
} | |
impl BasicRouter { | |
pub fn new() -> BasicRouter { | |
BasicRouter { | |
routes: HashMap::new(), | |
} | |
} | |
pub fn add_route<H>(&mut self, url: &str, handler: H) | |
where | |
H: 'static + Fn(&Request) -> Response, | |
{ | |
self.routes.insert(url.to_owned(), Box::new(handler)); | |
} | |
pub fn handle_route(&self, req: &Request) -> Response { | |
match self.routes.get(&req.url) { | |
None => Response { | |
code: 404, | |
headers: HashMap::new(), | |
body: Vec::new(), | |
}, | |
Some(handler) => handler(req), | |
} | |
} | |
} |
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