openethereum/dapps/src/router/mod.rs

256 lines
7.0 KiB
Rust

// Copyright 2015, 2016 Ethcore (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! Router implementation
//! Processes request handling authorization and dispatching it to proper application.
mod url;
mod redirect;
pub mod auth;
use DAPPS_DOMAIN;
use std::sync::Arc;
use std::collections::HashMap;
use url::Host;
use hyper;
use hyper::{server, uri, header};
use hyper::{Next, Encoder, Decoder};
use hyper::net::HttpStream;
use apps;
use endpoint::{Endpoint, Endpoints, EndpointPath};
use self::url::Url;
use self::auth::{Authorization, Authorized};
use self::redirect::Redirection;
/// Special endpoints are accessible on every domain (every dapp)
#[derive(Debug, PartialEq, Hash, Eq)]
pub enum SpecialEndpoint {
Rpc,
Api,
Utils,
None,
}
pub struct Router<A: Authorization + 'static> {
main_page: &'static str,
endpoints: Arc<Endpoints>,
special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
authorization: Arc<A>,
handler: Box<server::Handler<HttpStream>>,
}
impl<A: Authorization + 'static> server::Handler<HttpStream> for Router<A> {
fn on_request(&mut self, req: server::Request) -> Next {
// Check authorization
let auth = self.authorization.is_authorized(&req);
// Choose proper handler depending on path / domain
self.handler = match auth {
Authorized::No(handler) => handler,
Authorized::Yes => {
let url = extract_url(&req);
let endpoint = extract_endpoint(&url);
match endpoint {
// First check special endpoints
(ref path, ref endpoint) if self.special.contains_key(endpoint) => {
self.special.get(endpoint).unwrap().to_handler(path.clone().unwrap_or_default())
},
// Then delegate to dapp
(Some(ref path), _) if self.endpoints.contains_key(&path.app_id) => {
self.endpoints.get(&path.app_id).unwrap().to_handler(path.clone())
},
// Redirection to main page
_ if *req.method() == hyper::method::Method::Get => {
Redirection::new(self.main_page)
},
// RPC by default
_ => {
self.special.get(&SpecialEndpoint::Rpc).unwrap().to_handler(EndpointPath::default())
}
}
}
};
// Delegate on_request to proper handler
self.handler.on_request(req)
}
/// This event occurs each time the `Request` is ready to be read from.
fn on_request_readable(&mut self, decoder: &mut Decoder<HttpStream>) -> Next {
self.handler.on_request_readable(decoder)
}
/// This event occurs after the first time this handled signals `Next::write()`.
fn on_response(&mut self, response: &mut server::Response) -> Next {
self.handler.on_response(response)
}
/// This event occurs each time the `Response` is ready to be written to.
fn on_response_writable(&mut self, encoder: &mut Encoder<HttpStream>) -> Next {
self.handler.on_response_writable(encoder)
}
}
impl<A: Authorization> Router<A> {
pub fn new(
main_page: &'static str,
endpoints: Arc<Endpoints>,
special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
authorization: Arc<A>) -> Self {
let handler = special.get(&SpecialEndpoint::Rpc).unwrap().to_handler(EndpointPath::default());
Router {
main_page: main_page,
endpoints: endpoints,
special: special,
authorization: authorization,
handler: handler,
}
}
}
fn extract_url(req: &server::Request) -> Option<Url> {
match *req.uri() {
uri::RequestUri::AbsoluteUri(ref url) => {
match Url::from_generic_url(url.clone()) {
Ok(url) => Some(url),
_ => None,
}
},
uri::RequestUri::AbsolutePath(ref path) => {
// Attempt to prepend the Host header (mandatory in HTTP/1.1)
let url_string = match req.headers().get::<header::Host>() {
Some(ref host) => {
format!("http://{}:{}{}", host.hostname, host.port.unwrap_or(80), path)
},
None => return None,
};
match Url::parse(&url_string) {
Ok(url) => Some(url),
_ => None,
}
},
_ => None,
}
}
fn extract_endpoint(url: &Option<Url>) -> (Option<EndpointPath>, SpecialEndpoint) {
fn special_endpoint(url: &Url) -> SpecialEndpoint {
if url.path.len() <= 1 {
return SpecialEndpoint::None;
}
match url.path[0].as_ref() {
apps::RPC_PATH => SpecialEndpoint::Rpc,
apps::API_PATH => SpecialEndpoint::Api,
apps::UTILS_PATH => SpecialEndpoint::Utils,
_ => SpecialEndpoint::None,
}
}
match *url {
Some(ref url) => match url.host {
Host::Domain(ref domain) if domain.ends_with(DAPPS_DOMAIN) => {
let len = domain.len() - DAPPS_DOMAIN.len();
let id = domain[0..len].to_owned();
(Some(EndpointPath {
app_id: id,
host: domain.clone(),
port: url.port,
}), special_endpoint(url))
},
_ if url.path.len() > 1 => {
let id = url.path[0].clone();
(Some(EndpointPath {
app_id: id.clone(),
host: format!("{}", url.host),
port: url.port,
}), special_endpoint(url))
},
_ => (None, special_endpoint(url)),
},
_ => (None, SpecialEndpoint::None)
}
}
#[test]
fn should_extract_endpoint() {
assert_eq!(extract_endpoint(&None), (None, SpecialEndpoint::None));
// With path prefix
assert_eq!(
extract_endpoint(&Url::parse("http://localhost:8080/status/index.html").ok()),
(Some(EndpointPath {
app_id: "status".to_owned(),
host: "localhost".to_owned(),
port: 8080,
}), SpecialEndpoint::None)
);
// With path prefix
assert_eq!(
extract_endpoint(&Url::parse("http://localhost:8080/rpc/").ok()),
(Some(EndpointPath {
app_id: "rpc".to_owned(),
host: "localhost".to_owned(),
port: 8080,
}), SpecialEndpoint::Rpc)
);
assert_eq!(
extract_endpoint(&Url::parse("http://my.status.parity/parity-utils/inject.js").ok()),
(Some(EndpointPath {
app_id: "my.status".to_owned(),
host: "my.status.parity".to_owned(),
port: 80,
}), SpecialEndpoint::Utils)
);
// By Subdomain
assert_eq!(
extract_endpoint(&Url::parse("http://my.status.parity/test.html").ok()),
(Some(EndpointPath {
app_id: "my.status".to_owned(),
host: "my.status.parity".to_owned(),
port: 80,
}), SpecialEndpoint::None)
);
// RPC by subdomain
assert_eq!(
extract_endpoint(&Url::parse("http://my.status.parity/rpc/").ok()),
(Some(EndpointPath {
app_id: "my.status".to_owned(),
host: "my.status.parity".to_owned(),
port: 80,
}), SpecialEndpoint::Rpc)
);
// API by subdomain
assert_eq!(
extract_endpoint(&Url::parse("http://my.status.parity/api/").ok()),
(Some(EndpointPath {
app_id: "my.status".to_owned(),
host: "my.status.parity".to_owned(),
port: 80,
}), SpecialEndpoint::Api)
);
}