openethereum/dapps/src/lib.rs

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// 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/>.
//! Ethcore Webapplications for Parity
//! ```
//! extern crate jsonrpc_core;
//! extern crate ethcore_dapps;
//!
//! use std::sync::Arc;
//! use jsonrpc_core::IoHandler;
//! use ethcore_dapps::*;
//!
//! struct SayHello;
//! impl MethodCommand for SayHello {
//! fn execute(&self, _params: Params) -> Result<Value, Error> {
//! Ok(Value::String("hello".to_string()))
//! }
//! }
//!
//! fn main() {
//! let io = IoHandler::new();
//! io.add_method("say_hello", SayHello);
//! let _server = Server::start_unsecure_http(
//! &"127.0.0.1:3030".parse().unwrap(),
//! Arc::new(io)
//! );
//! }
//! ```
//!
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#![warn(missing_docs)]
#![cfg_attr(feature="nightly", plugin(clippy))]
extern crate hyper;
extern crate time;
extern crate url as url_lib;
extern crate unicase;
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extern crate serde;
extern crate serde_json;
extern crate zip;
extern crate rand;
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extern crate jsonrpc_core;
extern crate jsonrpc_http_server;
extern crate mime_guess;
extern crate rustc_serialize;
extern crate ethcore_rpc;
extern crate ethcore_util as util;
extern crate ethcore_hash_fetch as hash_fetch;
extern crate linked_hash_map;
extern crate fetch;
extern crate parity_dapps_glue as parity_dapps;
#[macro_use]
extern crate log;
#[macro_use]
extern crate mime;
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#[cfg(test)]
extern crate ethcore_devtools as devtools;
#[cfg(test)]
extern crate env_logger;
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mod endpoint;
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mod apps;
mod page;
mod router;
mod handlers;
mod rpc;
mod api;
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mod proxypac;
mod url;
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#[cfg(test)]
mod tests;
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use std::sync::{Arc, Mutex};
use std::net::SocketAddr;
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use std::collections::HashMap;
use hash_fetch::urlhint::ContractClient;
use jsonrpc_core::{IoHandler, IoDelegate};
use router::auth::{Authorization, NoAuth, HttpBasicAuth};
use ethcore_rpc::Extendable;
use self::apps::{HOME_PAGE, DAPPS_DOMAIN};
/// Indicates sync status
pub trait SyncStatus: Send + Sync {
/// Returns true if there is a major sync happening.
fn is_major_importing(&self) -> bool;
}
impl<F> SyncStatus for F where F: Fn() -> bool + Send + Sync {
fn is_major_importing(&self) -> bool { self() }
}
/// Webapps HTTP+RPC server build.
pub struct ServerBuilder {
dapps_path: String,
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handler: Arc<IoHandler>,
registrar: Arc<ContractClient>,
sync_status: Arc<SyncStatus>,
signer_address: Option<(String, u16)>,
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}
impl Extendable for ServerBuilder {
fn add_delegate<D: Send + Sync + 'static>(&self, delegate: IoDelegate<D>) {
self.handler.add_delegate(delegate);
}
}
impl ServerBuilder {
/// Construct new dapps server
pub fn new(dapps_path: String, registrar: Arc<ContractClient>) -> Self {
ServerBuilder {
dapps_path: dapps_path,
handler: Arc::new(IoHandler::new()),
registrar: registrar,
sync_status: Arc::new(|| false),
signer_address: None,
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}
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}
/// Change default sync status.
pub fn with_sync_status(&mut self, status: Arc<SyncStatus>) {
self.sync_status = status;
}
/// Change default signer port.
pub fn with_signer_address(&mut self, signer_address: Option<(String, u16)>) {
self.signer_address = signer_address;
}
/// Asynchronously start server with no authentication,
/// returns result with `Server` handle on success or an error.
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pub fn start_unsecured_http(&self, addr: &SocketAddr, hosts: Option<Vec<String>>) -> Result<Server, ServerError> {
Server::start_http(
addr,
hosts,
NoAuth,
self.handler.clone(),
self.dapps_path.clone(),
self.signer_address.clone(),
self.registrar.clone(),
self.sync_status.clone(),
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)
}
/// Asynchronously start server with `HTTP Basic Authentication`,
/// return result with `Server` handle on success or an error.
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pub fn start_basic_auth_http(&self, addr: &SocketAddr, hosts: Option<Vec<String>>, username: &str, password: &str) -> Result<Server, ServerError> {
Server::start_http(
addr,
hosts,
HttpBasicAuth::single_user(username, password),
self.handler.clone(),
self.dapps_path.clone(),
self.signer_address.clone(),
self.registrar.clone(),
self.sync_status.clone(),
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)
}
}
/// Webapps HTTP server.
pub struct Server {
server: Option<hyper::server::Listening>,
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panic_handler: Arc<Mutex<Option<Box<Fn() -> () + Send>>>>,
}
impl Server {
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/// Returns a list of allowed hosts or `None` if all hosts are allowed.
fn allowed_hosts(hosts: Option<Vec<String>>, bind_address: String) -> Option<Vec<String>> {
let mut allowed = Vec::new();
match hosts {
Some(hosts) => allowed.extend_from_slice(&hosts),
None => return None,
}
// Add localhost domain as valid too if listening on loopback interface.
allowed.push(bind_address.replace("127.0.0.1", "localhost").into());
allowed.push(bind_address.into());
Some(allowed)
}
/// Returns a list of CORS domains for API endpoint.
fn cors_domains(signer_address: Option<(String, u16)>) -> Vec<String> {
match signer_address {
Some(signer_address) => vec![
format!("http://{}{}", HOME_PAGE, DAPPS_DOMAIN),
format!("http://{}", address(signer_address)),
],
None => vec![],
}
}
fn start_http<A: Authorization + 'static>(
addr: &SocketAddr,
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hosts: Option<Vec<String>>,
authorization: A,
handler: Arc<IoHandler>,
dapps_path: String,
signer_address: Option<(String, u16)>,
registrar: Arc<ContractClient>,
sync_status: Arc<SyncStatus>,
) -> Result<Server, ServerError> {
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let panic_handler = Arc::new(Mutex::new(None));
let authorization = Arc::new(authorization);
let content_fetcher = Arc::new(apps::fetcher::ContentFetcher::new(hash_fetch::urlhint::URLHintContract::new(registrar), sync_status, signer_address.clone()));
let endpoints = Arc::new(apps::all_endpoints(dapps_path, signer_address.clone()));
let cors_domains = Self::cors_domains(signer_address.clone());
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let special = Arc::new({
let mut special = HashMap::new();
special.insert(router::SpecialEndpoint::Rpc, rpc::rpc(handler, panic_handler.clone()));
special.insert(router::SpecialEndpoint::Utils, apps::utils());
special.insert(
router::SpecialEndpoint::Api,
api::RestApi::new(cors_domains, endpoints.clone(), content_fetcher.clone())
);
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special
});
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let hosts = Self::allowed_hosts(hosts, format!("{}", addr));
try!(hyper::Server::http(addr))
.handle(move |ctrl| router::Router::new(
ctrl,
signer_address.clone(),
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content_fetcher.clone(),
endpoints.clone(),
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special.clone(),
authorization.clone(),
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hosts.clone(),
))
.map(|(l, srv)| {
::std::thread::spawn(move || {
srv.run();
});
Server {
server: Some(l),
panic_handler: panic_handler,
}
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})
.map_err(ServerError::from)
}
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/// Set callback for panics.
pub fn set_panic_handler<F>(&self, handler: F) where F : Fn() -> () + Send + 'static {
*self.panic_handler.lock().unwrap() = Some(Box::new(handler));
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}
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#[cfg(test)]
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/// Returns address that this server is bound to.
pub fn addr(&self) -> &SocketAddr {
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self.server.as_ref()
.expect("server is always Some at the start; it's consumed only when object is dropped; qed")
.addrs()
.first()
.expect("You cannot start the server without binding to at least one address; qed")
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}
}
impl Drop for Server {
fn drop(&mut self) {
self.server.take().unwrap().close()
}
}
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/// Webapp Server startup error
#[derive(Debug)]
pub enum ServerError {
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/// Wrapped `std::io::Error`
IoError(std::io::Error),
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/// Other `hyper` error
Other(hyper::error::Error),
}
impl From<hyper::error::Error> for ServerError {
fn from(err: hyper::error::Error) -> Self {
match err {
hyper::error::Error::Io(e) => ServerError::IoError(e),
e => ServerError::Other(e),
}
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}
}
/// Random filename
pub fn random_filename() -> String {
use ::rand::Rng;
let mut rng = ::rand::OsRng::new().unwrap();
rng.gen_ascii_chars().take(12).collect()
}
fn address(address: (String, u16)) -> String {
format!("{}:{}", address.0, address.1)
}
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#[cfg(test)]
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mod util_tests {
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use super::Server;
#[test]
fn should_return_allowed_hosts() {
// given
let bind_address = "127.0.0.1".to_owned();
// when
let all = Server::allowed_hosts(None, bind_address.clone());
let address = Server::allowed_hosts(Some(Vec::new()), bind_address.clone());
let some = Server::allowed_hosts(Some(vec!["ethcore.io".into()]), bind_address.clone());
// then
assert_eq!(all, None);
assert_eq!(address, Some(vec!["localhost".into(), "127.0.0.1".into()]));
assert_eq!(some, Some(vec!["ethcore.io".into(), "localhost".into(), "127.0.0.1".into()]));
}
#[test]
fn should_return_cors_domains() {
// given
// when
let none = Server::cors_domains(None);
let some = Server::cors_domains(Some(("127.0.0.1".into(), 18180)));
// then
assert_eq!(none, Vec::<String>::new());
assert_eq!(some, vec!["http://home.parity".to_owned(), "http://127.0.0.1:18180".into()]);
}
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}