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use std::sync::Arc; use std::collections::HashMap; use std::collections::hash_map; use service::Service; use solicit::header::Headers; use stream_part::HttpPartStream; use resp::Response; #[derive(Default)] struct Node { service: Option<Arc<Service>>, children: HashMap<String, Node>, } impl Node { fn add_service(&mut self, path: &str, service: Arc<Service>) { match split_path(path) { None => { self.service = Some(service); } Some((first, rem)) => { let node = match self.children.entry(first.to_owned()) { hash_map::Entry::Occupied(e) => e.into_mut(), hash_map::Entry::Vacant(e) => e.insert(Node { service: None, children: HashMap::new(), }), }; node.add_service(rem, service); } } } fn remove_service(&mut self, path: &str) -> Option<Arc<Service>> { match split_path(path) { None => { self.service.take() } Some((first, rem)) => { match self.children.get_mut(first) { Some(child) => { child.remove_service(rem) } None => None, } } } } fn find_service(&self, path: &str) -> Option<&Service> { if let Some((first, rem)) = split_path(path) { if let Some(node) = self.children.get(first) { if let Some(service) = node.find_service(rem) { return Some(service); } } } self.service.as_ref().map(|a| a.as_ref()) } } fn split_path<'a>(mut path: &'a str) -> Option<(&'a str, &'a str)> { path = path.trim_left_matches('/'); if path.is_empty() { None } else { let slash = path.find('/'); match slash { Some(slash) => { Some((&path[..slash], &path[slash + 1..])) } None => { Some((path, "")) } } } } #[test] fn test_split_path() { assert_eq!(None, split_path("")); assert_eq!(None, split_path("/")); assert_eq!(Some(("first", "")), split_path("first")); assert_eq!(Some(("first", "")), split_path("first/")); assert_eq!(Some(("first", "")), split_path("/first")); assert_eq!(Some(("first", "")), split_path("/first/")); assert_eq!(Some(("first", "second")), split_path("/first/second")); assert_eq!(Some(("first", "second/")), split_path("/first/second/")); assert_eq!(Some(("first", "second/third")), split_path("/first/second/third")); assert_eq!(Some(("first", "second/third/")), split_path("/first/second/third/")); } #[derive(Default)] pub struct ServicePaths { root: Node, } impl ServicePaths { pub fn new() -> ServicePaths { Default::default() } pub fn set_service(&mut self, path: &str, service: Arc<Service>) { assert!(path.starts_with("/")); self.root.add_service(path, service); } pub fn set_service_fn<F>(&mut self, path: &str, service: F) where F : Fn(Headers, HttpPartStream) -> Response + Send + Sync + 'static { impl<F : Fn(Headers, HttpPartStream) -> Response + Send + Sync + 'static> Service for F { fn start_request(&self, headers: Headers, req: HttpPartStream) -> Response { self(headers, req) } } self.set_service(path, Arc::new(service)) } pub fn remove_service(&mut self, path: &str) ->Option<Arc<Service>> { assert!(path.starts_with("/")); self.root.remove_service(path) } fn find_service(&self, path: &str) -> Option<&Service> { self.root.find_service(path) } } impl Service for ServicePaths { fn start_request(&self, headers: Headers, req: HttpPartStream) -> Response { if let Some(service) = self.find_service(headers.path()) { service.start_request(headers, req) } else { Response::not_found_404() } } }