openethereum/parity/dapps.rs
2016-12-15 21:56:45 +01:00

195 lines
5.7 KiB
Rust

// Copyright 2015, 2016 Parity Technologies (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/>.
use std::sync::Arc;
use io::PanicHandler;
use rpc_apis;
use ethcore::client::Client;
use ethsync::SyncProvider;
use helpers::replace_home;
use dir::default_data_path;
#[derive(Debug, PartialEq, Clone)]
pub struct Configuration {
pub enabled: bool,
pub interface: String,
pub port: u16,
pub hosts: Option<Vec<String>>,
pub user: Option<String>,
pub pass: Option<String>,
pub dapps_path: String,
}
impl Default for Configuration {
fn default() -> Self {
let data_dir = default_data_path();
Configuration {
enabled: true,
interface: "127.0.0.1".into(),
port: 8080,
hosts: Some(Vec::new()),
user: None,
pass: None,
dapps_path: replace_home(&data_dir, "$BASE/dapps"),
}
}
}
pub struct Dependencies {
pub panic_handler: Arc<PanicHandler>,
pub apis: Arc<rpc_apis::Dependencies>,
pub client: Arc<Client>,
pub sync: Arc<SyncProvider>,
}
pub fn new(configuration: Configuration, deps: Dependencies) -> Result<Option<WebappServer>, String> {
if !configuration.enabled {
return Ok(None);
}
let signer_address = deps.apis.signer_service.address();
let url = format!("{}:{}", configuration.interface, configuration.port);
let addr = try!(url.parse().map_err(|_| format!("Invalid Webapps listen host/port given: {}", url)));
let auth = configuration.user.as_ref().map(|username| {
let password = configuration.pass.as_ref().map_or_else(|| {
use rpassword::read_password;
println!("Type password for WebApps server (user: {}): ", username);
let pass = read_password().unwrap();
println!("OK, got it. Starting server...");
pass
}, |pass| pass.to_owned());
(username.to_owned(), password)
});
Ok(Some(try!(setup_dapps_server(deps, configuration.dapps_path, &addr, configuration.hosts, auth, signer_address))))
}
pub use self::server::WebappServer;
pub use self::server::setup_dapps_server;
#[cfg(not(feature = "dapps"))]
mod server {
use super::Dependencies;
use std::net::SocketAddr;
pub struct WebappServer;
pub fn setup_dapps_server(
_deps: Dependencies,
_dapps_path: String,
_url: &SocketAddr,
_allowed_hosts: Option<Vec<String>>,
_auth: Option<(String, String)>,
_signer_address: Option<(String, u16)>,
) -> Result<WebappServer, String> {
Err("Your Parity version has been compiled without WebApps support.".into())
}
}
#[cfg(feature = "dapps")]
mod server {
use super::Dependencies;
use std::sync::Arc;
use std::net::SocketAddr;
use std::io;
use util::{Bytes, Address, U256};
use ethcore::transaction::{Transaction, Action};
use ethcore::client::{Client, BlockChainClient, BlockId};
use rpc_apis;
use ethcore_rpc::is_major_importing;
use hash_fetch::urlhint::ContractClient;
pub use ethcore_dapps::Server as WebappServer;
pub fn setup_dapps_server(
deps: Dependencies,
dapps_path: String,
url: &SocketAddr,
allowed_hosts: Option<Vec<String>>,
auth: Option<(String, String)>,
signer_address: Option<(String, u16)>,
) -> Result<WebappServer, String> {
use ethcore_dapps as dapps;
let mut server = dapps::ServerBuilder::new(
dapps_path,
Arc::new(Registrar { client: deps.client.clone() })
);
let sync = deps.sync.clone();
let client = deps.client.clone();
server.with_sync_status(Arc::new(move || is_major_importing(Some(sync.status().state), client.queue_info())));
server.with_signer_address(signer_address);
let server = rpc_apis::setup_rpc(server, deps.apis.clone(), rpc_apis::ApiSet::UnsafeContext);
let start_result = match auth {
None => {
server.start_unsecured_http(url, allowed_hosts)
},
Some((username, password)) => {
server.start_basic_auth_http(url, allowed_hosts, &username, &password)
},
};
match start_result {
Err(dapps::ServerError::IoError(err)) => match err.kind() {
io::ErrorKind::AddrInUse => Err(format!("WebApps address {} is already in use, make sure that another instance of an Ethereum client is not running or change the address using the --dapps-port and --dapps-interface options.", url)),
_ => Err(format!("WebApps io error: {}", err)),
},
Err(e) => Err(format!("WebApps error: {:?}", e)),
Ok(server) => {
server.set_panic_handler(move || {
deps.panic_handler.notify_all("Panic in WebApp thread.".to_owned());
});
Ok(server)
},
}
}
struct Registrar {
client: Arc<Client>,
}
impl ContractClient for Registrar {
fn registrar(&self) -> Result<Address, String> {
self.client.additional_params().get("registrar")
.ok_or_else(|| "Registrar not defined.".into())
.and_then(|registrar| {
registrar.parse().map_err(|e| format!("Invalid registrar address: {:?}", e))
})
}
fn call(&self, address: Address, data: Bytes) -> Result<Bytes, String> {
let from = Address::default();
let transaction = Transaction {
nonce: self.client.latest_nonce(&from),
action: Action::Call(address),
gas: U256::from(50_000_000),
gas_price: U256::default(),
value: U256::default(),
data: data,
}.fake_sign(from);
self.client.call(&transaction, BlockId::Latest, Default::default())
.map_err(|e| format!("{:?}", e))
.map(|executed| {
executed.output
})
}
}
}