mirror of
https://github.com/fafhrd91/actix-web
synced 2024-11-28 01:52:57 +01:00
597 lines
21 KiB
Rust
597 lines
21 KiB
Rust
use std::marker::PhantomData;
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use regex::Regex;
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use futures::future::{Future, ok, err};
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use http::{header, StatusCode, Error as HttpError};
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use body::Body;
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use error::Error;
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use httprequest::HttpRequest;
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use httpresponse::HttpResponse;
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/// Trait defines object that could be registered as route handler
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#[allow(unused_variables)]
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pub trait Handler<S>: 'static {
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/// The type of value that handler will return.
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type Result: Responder;
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/// Handle request
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fn handle(&mut self, req: HttpRequest<S>) -> Self::Result;
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}
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/// Trait implemented by types that generate responses for clients.
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///
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/// Types that implement this trait can be used as the return type of a handler.
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pub trait Responder {
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/// The associated item which can be returned.
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type Item: Into<Reply>;
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/// The associated error which can be returned.
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type Error: Into<Error>;
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/// Convert itself to `Reply` or `Error`.
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fn respond_to(self, req: HttpRequest) -> Result<Self::Item, Self::Error>;
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}
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#[doc(hidden)]
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/// Convenience trait that convert `Future` object into `Boxed` future
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pub trait AsyncResponder<I, E>: Sized {
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fn responder(self) -> Box<Future<Item=I, Error=E>>;
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}
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impl<F, I, E> AsyncResponder<I, E> for F
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where F: Future<Item=I, Error=E> + 'static,
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I: Responder + 'static,
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E: Into<Error> + 'static,
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{
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fn responder(self) -> Box<Future<Item=I, Error=E>> {
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Box::new(self)
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}
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}
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/// Handler<S> for Fn()
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impl<F, R, S> Handler<S> for F
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where F: Fn(HttpRequest<S>) -> R + 'static,
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R: Responder + 'static
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{
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type Result = R;
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fn handle(&mut self, req: HttpRequest<S>) -> R {
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(self)(req)
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}
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}
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/// Represents response process.
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pub struct Reply(ReplyItem);
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pub(crate) enum ReplyItem {
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Message(HttpResponse),
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Future(Box<Future<Item=HttpResponse, Error=Error>>),
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}
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impl Reply {
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/// Create async response
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#[inline]
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pub fn async<F>(fut: F) -> Reply
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where F: Future<Item=HttpResponse, Error=Error> + 'static
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{
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Reply(ReplyItem::Future(Box::new(fut)))
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}
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/// Send response
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#[inline]
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pub fn response<R: Into<HttpResponse>>(response: R) -> Reply {
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Reply(ReplyItem::Message(response.into()))
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}
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#[inline]
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pub(crate) fn into(self) -> ReplyItem {
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self.0
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}
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#[cfg(test)]
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pub(crate) fn as_response(&self) -> Option<&HttpResponse> {
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match self.0 {
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ReplyItem::Message(ref resp) => Some(resp),
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_ => None,
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}
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}
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}
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impl Responder for Reply {
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type Item = Reply;
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type Error = Error;
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fn respond_to(self, _: HttpRequest) -> Result<Reply, Error> {
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Ok(self)
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}
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}
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impl Responder for HttpResponse {
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type Item = Reply;
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type Error = Error;
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#[inline]
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fn respond_to(self, _: HttpRequest) -> Result<Reply, Error> {
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Ok(Reply(ReplyItem::Message(self)))
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}
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}
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impl From<HttpResponse> for Reply {
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#[inline]
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fn from(resp: HttpResponse) -> Reply {
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Reply(ReplyItem::Message(resp))
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}
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}
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impl<T: Responder, E: Into<Error>> Responder for Result<T, E>
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{
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type Item = <T as Responder>::Item;
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type Error = Error;
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fn respond_to(self, req: HttpRequest) -> Result<Self::Item, Self::Error> {
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match self {
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Ok(val) => match val.respond_to(req) {
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Ok(val) => Ok(val),
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Err(err) => Err(err.into()),
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},
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Err(err) => Err(err.into()),
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}
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}
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}
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impl<E: Into<Error>> From<Result<Reply, E>> for Reply {
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#[inline]
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fn from(res: Result<Reply, E>) -> Self {
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match res {
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Ok(val) => val,
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Err(err) => Reply(ReplyItem::Message(err.into().into())),
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}
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}
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}
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impl<E: Into<Error>> From<Result<HttpResponse, E>> for Reply {
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#[inline]
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fn from(res: Result<HttpResponse, E>) -> Self {
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match res {
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Ok(val) => Reply(ReplyItem::Message(val)),
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Err(err) => Reply(ReplyItem::Message(err.into().into())),
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}
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}
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}
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impl From<Box<Future<Item=HttpResponse, Error=Error>>> for Reply {
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#[inline]
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fn from(fut: Box<Future<Item=HttpResponse, Error=Error>>) -> Reply {
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Reply(ReplyItem::Future(fut))
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}
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}
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impl<I, E> Responder for Box<Future<Item=I, Error=E>>
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where I: Responder + 'static,
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E: Into<Error> + 'static
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{
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type Item = Reply;
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type Error = Error;
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#[inline]
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fn respond_to(self, req: HttpRequest) -> Result<Reply, Error> {
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let fut = self.map_err(|e| e.into())
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.then(move |r| {
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match r.respond_to(req) {
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Ok(reply) => match reply.into().0 {
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ReplyItem::Message(resp) => ok(resp),
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_ => panic!("Nested async replies are not supported"),
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},
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Err(e) => err(e),
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}
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});
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Ok(Reply::async(fut))
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}
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}
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/// Trait defines object that could be registered as resource route
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pub(crate) trait RouteHandler<S>: 'static {
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fn handle(&mut self, req: HttpRequest<S>) -> Reply;
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}
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/// Route handler wrapper for Handler
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pub(crate)
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struct WrapHandler<S, H, R>
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where H: Handler<S, Result=R>,
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R: Responder,
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S: 'static,
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{
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h: H,
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s: PhantomData<S>,
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}
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impl<S, H, R> WrapHandler<S, H, R>
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where H: Handler<S, Result=R>,
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R: Responder,
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S: 'static,
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{
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pub fn new(h: H) -> Self {
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WrapHandler{h, s: PhantomData}
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}
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}
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impl<S, H, R> RouteHandler<S> for WrapHandler<S, H, R>
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where H: Handler<S, Result=R>,
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R: Responder + 'static,
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S: 'static,
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{
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fn handle(&mut self, req: HttpRequest<S>) -> Reply {
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let req2 = req.without_state();
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match self.h.handle(req).respond_to(req2) {
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Ok(reply) => reply.into(),
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Err(err) => Reply::response(err.into()),
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}
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}
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}
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/// Async route handler
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pub(crate)
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struct AsyncHandler<S, H, F, R, E>
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where H: Fn(HttpRequest<S>) -> F + 'static,
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F: Future<Item=R, Error=E> + 'static,
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R: Responder + 'static,
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E: Into<Error> + 'static,
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S: 'static,
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{
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h: Box<H>,
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s: PhantomData<S>,
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}
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impl<S, H, F, R, E> AsyncHandler<S, H, F, R, E>
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where H: Fn(HttpRequest<S>) -> F + 'static,
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F: Future<Item=R, Error=E> + 'static,
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R: Responder + 'static,
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E: Into<Error> + 'static,
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S: 'static,
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{
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pub fn new(h: H) -> Self {
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AsyncHandler{h: Box::new(h), s: PhantomData}
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}
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}
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impl<S, H, F, R, E> RouteHandler<S> for AsyncHandler<S, H, F, R, E>
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where H: Fn(HttpRequest<S>) -> F + 'static,
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F: Future<Item=R, Error=E> + 'static,
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R: Responder + 'static,
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E: Into<Error> + 'static,
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S: 'static,
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{
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fn handle(&mut self, req: HttpRequest<S>) -> Reply {
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let req2 = req.without_state();
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let fut = (self.h)(req)
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.map_err(|e| e.into())
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.then(move |r| {
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match r.respond_to(req2) {
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Ok(reply) => match reply.into().0 {
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ReplyItem::Message(resp) => ok(resp),
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_ => panic!("Nested async replies are not supported"),
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},
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Err(e) => err(e),
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}
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});
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Reply::async(fut)
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}
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}
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/// Path normalization helper
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///
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/// By normalizing it means:
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///
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/// - Add a trailing slash to the path.
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/// - Remove a trailing slash from the path.
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/// - Double slashes are replaced by one.
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///
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/// The handler returns as soon as it finds a path that resolves
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/// correctly. The order if all enable is 1) merge, 3) both merge and append
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/// and 3) append. If the path resolves with
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/// at least one of those conditions, it will redirect to the new path.
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///
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/// If *append* is *true* append slash when needed. If a resource is
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/// defined with trailing slash and the request comes without it, it will
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/// append it automatically.
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///
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/// If *merge* is *true*, merge multiple consecutive slashes in the path into one.
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///
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/// This handler designed to be use as a handler for application's *default resource*.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// # #[macro_use] extern crate serde_derive;
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/// # use actix_web::*;
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/// #
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/// # fn index(req: HttpRequest) -> httpcodes::StaticResponse {
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/// # httpcodes::HttpOk
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/// # }
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/// fn main() {
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/// let app = Application::new()
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/// .resource("/test/", |r| r.f(index))
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/// .default_resource(|r| r.h(NormalizePath::default()))
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/// .finish();
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/// }
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/// ```
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/// In this example `/test`, `/test///` will be redirected to `/test/` url.
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pub struct NormalizePath {
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append: bool,
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merge: bool,
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re_merge: Regex,
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redirect: StatusCode,
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not_found: StatusCode,
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}
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impl Default for NormalizePath {
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/// Create default `NormalizePath` instance, *append* is set to *true*,
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/// *merge* is set to *true* and *redirect* is set to `StatusCode::MOVED_PERMANENTLY`
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fn default() -> NormalizePath {
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NormalizePath {
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append: true,
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merge: true,
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re_merge: Regex::new("//+").unwrap(),
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redirect: StatusCode::MOVED_PERMANENTLY,
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not_found: StatusCode::NOT_FOUND,
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}
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}
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}
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impl NormalizePath {
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/// Create new `NormalizePath` instance
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pub fn new(append: bool, merge: bool, redirect: StatusCode) -> NormalizePath {
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NormalizePath {
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append,
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merge,
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redirect,
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re_merge: Regex::new("//+").unwrap(),
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not_found: StatusCode::NOT_FOUND,
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}
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}
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}
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impl<S> Handler<S> for NormalizePath {
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type Result = Result<HttpResponse, HttpError>;
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fn handle(&mut self, req: HttpRequest<S>) -> Self::Result {
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if let Some(router) = req.router() {
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let query = req.query_string();
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if self.merge {
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// merge slashes
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let p = self.re_merge.replace_all(req.path(), "/");
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if p.len() != req.path().len() {
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if router.has_route(p.as_ref()) {
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let p = if !query.is_empty() { p + "?" + query } else { p };
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return HttpResponse::build(self.redirect)
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.header(header::LOCATION, p.as_ref())
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.body(Body::Empty);
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}
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// merge slashes and append trailing slash
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if self.append && !p.ends_with('/') {
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let p = p.as_ref().to_owned() + "/";
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if router.has_route(&p) {
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let p = if !query.is_empty() { p + "?" + query } else { p };
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return HttpResponse::build(self.redirect)
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.header(header::LOCATION, p.as_str())
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.body(Body::Empty);
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}
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}
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// try to remove trailing slash
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if p.ends_with('/') {
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let p = p.as_ref().trim_right_matches('/');
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if router.has_route(p) {
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let mut req = HttpResponse::build(self.redirect);
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return if !query.is_empty() {
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req.header(header::LOCATION, (p.to_owned() + "?" + query).as_str())
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} else {
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req.header(header::LOCATION, p)
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}
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.body(Body::Empty);
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}
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}
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} else if p.ends_with('/') {
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// try to remove trailing slash
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let p = p.as_ref().trim_right_matches('/');
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if router.has_route(p) {
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let mut req = HttpResponse::build(self.redirect);
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return if !query.is_empty() {
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req.header(header::LOCATION, (p.to_owned() + "?" + query).as_str())
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} else {
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req.header(header::LOCATION, p)
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}
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.body(Body::Empty);
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}
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}
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}
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// append trailing slash
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if self.append && !req.path().ends_with('/') {
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let p = req.path().to_owned() + "/";
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if router.has_route(&p) {
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let p = if !query.is_empty() { p + "?" + query } else { p };
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return HttpResponse::build(self.redirect)
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.header(header::LOCATION, p.as_str())
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.body(Body::Empty);
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}
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}
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}
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Ok(HttpResponse::new(self.not_found, Body::Empty))
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use http::{header, Method};
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use test::TestRequest;
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use application::Application;
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fn index(_req: HttpRequest) -> HttpResponse {
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HttpResponse::new(StatusCode::OK, Body::Empty)
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}
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#[test]
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fn test_normalize_path_trailing_slashes() {
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let mut app = Application::new()
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.resource("/resource1", |r| r.method(Method::GET).f(index))
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.resource("/resource2/", |r| r.method(Method::GET).f(index))
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.default_resource(|r| r.h(NormalizePath::default()))
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.finish();
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// trailing slashes
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let params =
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vec![("/resource1", "", StatusCode::OK),
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("/resource1/", "/resource1", StatusCode::MOVED_PERMANENTLY),
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("/resource2", "/resource2/", StatusCode::MOVED_PERMANENTLY),
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("/resource2/", "", StatusCode::OK),
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("/resource1?p1=1&p2=2", "", StatusCode::OK),
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("/resource1/?p1=1&p2=2", "/resource1?p1=1&p2=2", StatusCode::MOVED_PERMANENTLY),
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("/resource2?p1=1&p2=2", "/resource2/?p1=1&p2=2",
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StatusCode::MOVED_PERMANENTLY),
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("/resource2/?p1=1&p2=2", "", StatusCode::OK)
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];
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for (path, target, code) in params {
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let req = app.prepare_request(TestRequest::with_uri(path).finish());
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let resp = app.run(req);
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let r = resp.as_response().unwrap();
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assert_eq!(r.status(), code);
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if !target.is_empty() {
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assert_eq!(
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target,
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r.headers().get(header::LOCATION).unwrap().to_str().unwrap());
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}
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}
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}
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#[test]
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fn test_normalize_path_trailing_slashes_disabled() {
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let mut app = Application::new()
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.resource("/resource1", |r| r.method(Method::GET).f(index))
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.resource("/resource2/", |r| r.method(Method::GET).f(index))
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.default_resource(|r| r.h(
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NormalizePath::new(false, true, StatusCode::MOVED_PERMANENTLY)))
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.finish();
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// trailing slashes
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let params = vec![("/resource1", StatusCode::OK),
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("/resource1/", StatusCode::MOVED_PERMANENTLY),
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("/resource2", StatusCode::NOT_FOUND),
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("/resource2/", StatusCode::OK),
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("/resource1?p1=1&p2=2", StatusCode::OK),
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("/resource1/?p1=1&p2=2", StatusCode::MOVED_PERMANENTLY),
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("/resource2?p1=1&p2=2", StatusCode::NOT_FOUND),
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("/resource2/?p1=1&p2=2", StatusCode::OK)
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];
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for (path, code) in params {
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let req = app.prepare_request(TestRequest::with_uri(path).finish());
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let resp = app.run(req);
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let r = resp.as_response().unwrap();
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assert_eq!(r.status(), code);
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}
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}
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#[test]
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fn test_normalize_path_merge_slashes() {
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let mut app = Application::new()
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.resource("/resource1", |r| r.method(Method::GET).f(index))
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.resource("/resource1/a/b", |r| r.method(Method::GET).f(index))
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.default_resource(|r| r.h(NormalizePath::default()))
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.finish();
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// trailing slashes
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let params = vec![
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("/resource1/a/b", "", StatusCode::OK),
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("/resource1/", "/resource1", StatusCode::MOVED_PERMANENTLY),
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("/resource1//", "/resource1", StatusCode::MOVED_PERMANENTLY),
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("//resource1//a//b", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
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("//resource1//a//b/", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
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("//resource1//a//b//", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource1//a//b", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a//b/", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("/resource1/a/b?p=1", "", StatusCode::OK),
|
|
("//resource1//a//b?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource1//a//b/?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource1//a//b?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a//b/?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a//b//?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
];
|
|
for (path, target, code) in params {
|
|
let req = app.prepare_request(TestRequest::with_uri(path).finish());
|
|
let resp = app.run(req);
|
|
let r = resp.as_response().unwrap();
|
|
assert_eq!(r.status(), code);
|
|
if !target.is_empty() {
|
|
assert_eq!(
|
|
target,
|
|
r.headers().get(header::LOCATION).unwrap().to_str().unwrap());
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_normalize_path_merge_and_append_slashes() {
|
|
let mut app = Application::new()
|
|
.resource("/resource1", |r| r.method(Method::GET).f(index))
|
|
.resource("/resource2/", |r| r.method(Method::GET).f(index))
|
|
.resource("/resource1/a/b", |r| r.method(Method::GET).f(index))
|
|
.resource("/resource2/a/b/", |r| r.method(Method::GET).f(index))
|
|
.default_resource(|r| r.h(NormalizePath::default()))
|
|
.finish();
|
|
|
|
// trailing slashes
|
|
let params = vec![
|
|
("/resource1/a/b", "", StatusCode::OK),
|
|
("/resource1/a/b/", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b/", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b//", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource1//a//b", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource1//a//b/", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b/", "/resource1/a/b", StatusCode::MOVED_PERMANENTLY),
|
|
("/resource2/a/b", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("/resource2/a/b/", "", StatusCode::OK),
|
|
("//resource2//a//b", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b/", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource2//a//b", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource2//a//b/", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource2/a///b", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource2/a///b/", "/resource2/a/b/", StatusCode::MOVED_PERMANENTLY),
|
|
("/resource1/a/b?p=1", "", StatusCode::OK),
|
|
("/resource1/a/b/?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b/?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource1//a//b?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource1//a//b/?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b/?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource1/a///b//?p=1", "/resource1/a/b?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/resource2/a/b?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("//resource2//a//b/?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource2//a//b?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("///resource2//a//b/?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource2/a///b?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
("/////resource2/a///b/?p=1", "/resource2/a/b/?p=1", StatusCode::MOVED_PERMANENTLY),
|
|
];
|
|
for (path, target, code) in params {
|
|
let req = app.prepare_request(TestRequest::with_uri(path).finish());
|
|
let resp = app.run(req);
|
|
let r = resp.as_response().unwrap();
|
|
assert_eq!(r.status(), code);
|
|
if !target.is_empty() {
|
|
assert_eq!(
|
|
target, r.headers().get(header::LOCATION).unwrap().to_str().unwrap());
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
}
|