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extern crate route_recognizer as router; extern crate conduit; use std::collections::hash_map::{HashMap, Entry}; use std::error::Error; use std::fmt; use router::{Router, Match}; use conduit::{Method, Handler, Request, Response}; pub struct RouteBuilder { routers: HashMap<Method, Router<Box<Handler>>>, } #[derive(Debug)] pub struct RouterError(String); impl RouteBuilder { pub fn new() -> RouteBuilder { RouteBuilder { routers: HashMap::new() } } pub fn recognize<'a>(&'a self, method: &Method, path: &str) -> Result<Match<&'a Box<Handler>>, RouterError> { match self.routers.get(method) { Some(router) => router.recognize(path), None => Err(format!("No router found for {:?}", method)), }.map_err(RouterError) } pub fn map<'a, H: Handler>(&'a mut self, method: Method, pattern: &str, handler: H) -> &'a mut RouteBuilder { { let router = match self.routers.entry(method) { Entry::Occupied(e) => e.into_mut(), Entry::Vacant(e) => e.insert(Router::new()), }; router.add(pattern, Box::new(handler)); } self } pub fn get<'a, H: Handler>(&'a mut self, pattern: &str, handler: H) -> &'a mut RouteBuilder { self.map(Method::Get, pattern, handler) } pub fn post<'a, H: Handler>(&'a mut self, pattern: &str, handler: H) -> &'a mut RouteBuilder { self.map(Method::Post, pattern, handler) } pub fn put<'a, H: Handler>(&'a mut self, pattern: &str, handler: H) -> &'a mut RouteBuilder { self.map(Method::Put, pattern, handler) } pub fn delete<'a, H: Handler>(&'a mut self, pattern: &str, handler: H) -> &'a mut RouteBuilder { self.map(Method::Delete, pattern, handler) } pub fn head<'a, H: Handler>(&'a mut self, pattern: &str, handler: H) -> &'a mut RouteBuilder { self.map(Method::Head, pattern, handler) } } impl conduit::Handler for RouteBuilder { fn call(&self, request: &mut Request) -> Result<Response, Box<Error+Send>> { let m = { let method = request.method(); let path = request.path(); match self.recognize(&method, path) { Ok(m) => m, Err(e) => return Err(Box::new(e) as Box<Error+Send>) } }; { let extensions = request.mut_extensions(); extensions.insert(m.params.clone()); } (*m.handler).call(request) } } impl Error for RouterError { fn description(&self) -> &str { &self.0 } } impl fmt::Display for RouterError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.0, f) } } pub trait RequestParams<'a> { fn params(self) -> &'a router::Params; } pub fn params<'a>(req: &'a Request) -> &'a router::Params { req.extensions().find::<router::Params>() .expect("Missing params") } impl<'a> RequestParams<'a> for &'a (Request + 'a) { fn params(self) -> &'a router::Params { params(self) } } #[cfg(test)] mod tests { extern crate semver; use std::collections::HashMap; use std::io; use std::net::SocketAddr; use {RouteBuilder, RequestParams}; use conduit; use conduit::{Handler, Method, Scheme, Host, Headers, Extensions, TypeMap}; struct RequestSentinel { method: Method, path: String, extensions: conduit::Extensions } impl RequestSentinel { fn new(method: Method, path: &'static str) -> RequestSentinel { RequestSentinel { path: path.to_string(), extensions: TypeMap::new(), method: method } } } impl conduit::Request for RequestSentinel { fn http_version(&self) -> semver::Version { unimplemented!() } fn conduit_version(&self) -> semver::Version { unimplemented!() } fn method(&self) -> Method { self.method } fn scheme(&self) -> Scheme { unimplemented!() } fn host<'a>(&'a self) -> Host<'a> { unimplemented!() } fn virtual_root<'a>(&'a self) -> Option<&'a str> { unimplemented!() } fn path<'a>(&'a self) -> &'a str { &self.path } fn query_string<'a>(&'a self) -> Option<&'a str> { unimplemented!() } fn remote_addr(&self) -> SocketAddr { unimplemented!() } fn content_length(&self) -> Option<u64> { unimplemented!() } fn headers<'a>(&'a self) -> &'a Headers { unimplemented!() } fn body<'a>(&'a mut self) -> &'a mut io::Read { unimplemented!() } fn extensions<'a>(&'a self) -> &'a Extensions { &self.extensions } fn mut_extensions<'a>(&'a mut self) -> &'a mut Extensions { &mut self.extensions } } #[test] fn basic_get() { let router = test_router(); let mut req = RequestSentinel::new(Method::Get, "/posts/1"); let mut res = router.call(&mut req).ok().expect("No response"); assert_eq!(res.status, (200, "OK")); let mut s = String::new(); res.body.read_to_string(&mut s).unwrap(); assert_eq!(s, "1, Get".to_string()); } #[test] fn basic_post() { let router = test_router(); let mut req = RequestSentinel::new(Method::Post, "/posts/10"); let mut res = router.call(&mut req).ok().expect("No response"); assert_eq!(res.status, (200, "OK")); let mut s = String::new(); res.body.read_to_string(&mut s).unwrap(); assert_eq!(s, "10, Post".to_string()); } #[test] fn nonexistent_route() { let router = test_router(); let mut req = RequestSentinel::new(Method::Post, "/nonexistent"); router.call(&mut req).err().expect("No response"); } fn test_router() -> RouteBuilder { let mut router = RouteBuilder::new(); router.post("/posts/:id", test_handler); router.get("/posts/:id", test_handler); router } fn test_handler(req: &mut conduit::Request) -> io::Result<conduit::Response> { let mut res = vec!(); res.push(req.params()["id"].clone()); res.push(format!("{:?}", req.method())); Ok(conduit::Response { status: (200, "OK"), headers: HashMap::new(), body: Box::new(io::Cursor::new(res.connect(", ").into_bytes())) }) } }