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Chain head subscription (#126)

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* Start WebSockets server.

* Expose non-working subscription.

* Dummy subscription for testing.

* Proper implementation with event loop.

* Finalized pubsub.

* Bump clap.

* Fix yml.

* Disable WS logs.

* Remove stale TransactionHash mention

* Fix build from nightly API change.

* Don't panic on invalid port.

* Bind server to random port.

* Send only best blocks.
This commit is contained in:
Tomasz Drwięga
2018-04-17 13:03:57 +02:00
committed by Gav Wood
parent eb6d142846
commit e253a4cb9f
18 changed files with 464 additions and 107 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/substrate/rpc-servers/Cargo.toml
+5 -2
View File
@@ -4,6 +4,9 @@ version = "0.1.0"
authors = ["Parity Technologies <admin@parity.io>"]
[dependencies]
jsonrpc-core = { git = "https://github.com/paritytech/jsonrpc.git" }
jsonrpc-http-server = { git = "https://github.com/paritytech/jsonrpc.git" }
jsonrpc-pubsub = { git = "https://github.com/paritytech/jsonrpc.git" }
jsonrpc-ws-server = { git = "https://github.com/paritytech/jsonrpc.git" }
log = "0.3"
substrate-rpc = { path = "../rpc", version = "0.1" }
jsonrpc-core = { git="https://github.com/paritytech/jsonrpc.git" }
jsonrpc-http-server = { git="https://github.com/paritytech/jsonrpc.git" }
substrate/substrate/rpc-servers/src/lib.rs
+36 -7
View File
@@ -18,30 +18,42 @@
#[warn(missing_docs)]
extern crate substrate_rpc as apis;
pub extern crate substrate_rpc as apis;
extern crate jsonrpc_core as rpc;
extern crate jsonrpc_http_server as http;
extern crate jsonrpc_pubsub as pubsub;
extern crate jsonrpc_ws_server as ws;
#[macro_use]
extern crate log;
use std::io;
type Metadata = apis::metadata::Metadata;
type RpcHandler = pubsub::PubSubHandler<Metadata>;
/// Construct rpc `IoHandler`
pub fn rpc_handler<S, T, C>(state: S, transaction_pool: T, chain: C) -> rpc::IoHandler where
pub fn rpc_handler<S, C, A>(
state: S,
chain: C,
author: A,
) -> RpcHandler where
S: apis::state::StateApi,
T: apis::author::AuthorApi,
C: apis::chain::ChainApi,
C: apis::chain::ChainApi<Metadata=Metadata>,
A: apis::author::AuthorApi,
{
let mut io = rpc::IoHandler::new();
let mut io = pubsub::PubSubHandler::default();
io.extend_with(state.to_delegate());
io.extend_with(transaction_pool.to_delegate());
io.extend_with(chain.to_delegate());
io.extend_with(author.to_delegate());
io
}
/// Start HTTP server listening on given address.
pub fn start_http(
addr: &std::net::SocketAddr,
io: rpc::IoHandler,
io: RpcHandler,
) -> io::Result<http::Server> {
http::ServerBuilder::new(io)
.threads(4)
@@ -49,3 +61,20 @@ pub fn start_http(
.cors(http::DomainsValidation::Disabled)
.start_http(addr)
}
/// Start WS server listening on given address.
pub fn start_ws(
addr: &std::net::SocketAddr,
io: RpcHandler,
) -> io::Result<ws::Server> {
ws::ServerBuilder::with_meta_extractor(io, |context: &ws::RequestContext| Metadata::new(context.sender()))
.start(addr)
.map_err(|err| match err {
ws::Error(ws::ErrorKind::Io(io), _) => io,
ws::Error(ws::ErrorKind::ConnectionClosed, _) => io::ErrorKind::BrokenPipe.into(),
ws::Error(e, _) => {
error!("{}", e);
io::ErrorKind::Other.into()
}
})
}