HTTP work notifier

Cargo.lock

@@ -261,6 +261,7 @@ dependencies = [
  "ethjson 0.1.0",
  "ethstore 0.1.0",
  "heapsize 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyper 0.9.4 (git+https://github.com/ethcore/hyper)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -547,7 +548,7 @@ dependencies = [
 [[package]]
 name = "hyper"
 version = "0.9.4"
-source = "git+https://github.com/ethcore/hyper#7ccfcb2aa7e6aa6300efa8cebd6a0e6ce55582ea"
+source = "git+https://github.com/ethcore/hyper#9e346c1d4bc30cd4142dea9d8a0b117d30858ca4"
 dependencies = [
  "cookie 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "httparse 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -556,7 +557,7 @@ dependencies = [
  "mime 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rotor 0.6.3 (git+https://github.com/ethcore/rotor)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "spmc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "spmc 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1222,7 +1223,7 @@ dependencies = [
 
 [[package]]
 name = "spmc"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]

ethcore/Cargo.toml

@@ -32,6 +32,10 @@ bloomchain = "0.1"
 rayon = "0.3.1"
 ethstore = { path = "../ethstore" }
 
+[dependencies.hyper]
+git = "https://github.com/ethcore/hyper"
+default-features = false
+
 [features]
 jit = ["evmjit"]
 evm-debug = []

ethcore/src/ethereum/ethash.rs

@@ -14,9 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-extern crate ethash;
-
-use self::ethash::{quick_get_difficulty, EthashManager, H256 as EH256};
+use ethash::{quick_get_difficulty, EthashManager, H256 as EH256};
 use common::*;
 use block::*;
 use spec::CommonParams;

ethcore/src/lib.rs

@@ -91,6 +91,8 @@ extern crate ethjson;
 extern crate bloomchain;
 #[macro_use] extern crate ethcore_ipc as ipc;
 extern crate rayon;
+extern crate hyper;
+extern crate ethash;
 pub extern crate ethstore;
 
 #[cfg(test)] extern crate ethcore_devtools as devtools;

ethcore/src/miner/miner.rs

@@ -29,6 +29,7 @@ use receipt::{Receipt};
 use spec::Spec;
 use engine::Engine;
 use miner::{MinerService, MinerStatus, TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
+use miner::work_notify::WorkPoster;
 
 /// Different possible definitions for pending transaction set.
 #[derive(Debug)]
@@ -98,6 +99,7 @@ pub struct Miner {
 	spec: Spec,
 
 	accounts: Option<Arc<AccountProvider>>,
+	work_poster: Option<WorkPoster>,
 }
 
 impl Miner {
@@ -115,15 +117,18 @@ impl Miner {
 			extra_data: RwLock::new(Vec::new()),
 			accounts: None,
 			spec: spec,
+			work_poster: None,
 		}
 	}
 
 	/// Creates new instance of miner
 	pub fn new(options: MinerOptions, spec: Spec, accounts: Option<Arc<AccountProvider>>) -> Arc<Miner> {
+		let work_poster = if !options.new_work_notify.is_empty() { Some(WorkPoster::new(&options.new_work_notify)) } else { None };
 		Arc::new(Miner {
 			transaction_queue: Mutex::new(TransactionQueue::with_limits(options.tx_queue_size, options.tx_gas_limit)),
-			sealing_enabled: AtomicBool::new(options.force_sealing),
+			sealing_enabled: AtomicBool::new(options.force_sealing || !options.new_work_notify.is_empty()),
 			next_allowed_reseal: Mutex::new(Instant::now()),
+			options: options,
 			sealing_block_last_request: Mutex::new(0),
 			sealing_work: Mutex::new(UsingQueue::new(options.work_queue_size)),
 			gas_range_target: RwLock::new((U256::zero(), U256::zero())),
@@ -132,6 +137,7 @@ impl Miner {
 			accounts: accounts,
 			options: options,
 			spec: spec,
+			work_poster: work_poster,
 		})
 	}
 
@@ -139,6 +145,10 @@ impl Miner {
 		self.spec.engine.deref()
 	}
 
+	fn forced_sealing(&self) -> bool {
+		self.options.force_sealing || !self.options.new_work_notify.is_empty()
+	}
+
 	/// Prepares new block for sealing including top transactions from queue.
 	#[cfg_attr(feature="dev", allow(match_same_arms))]
 	#[cfg_attr(feature="dev", allow(cyclomatic_complexity))]
@@ -240,13 +250,22 @@ impl Miner {
 			}
 		}
 
+		let work = {
 			let mut sealing_work = self.sealing_work.lock().unwrap();
-		if sealing_work.peek_last_ref().map_or(true, |pb| pb.block().fields().header.hash() != block.block().fields().header.hash()) {
+			let work = if sealing_work.peek_last_ref().map_or(true, |pb| pb.block().fields().header.hash() != block.block().fields().header.hash()) {
 				trace!(target: "miner", "Pushing a new, refreshed or borrowed pending {}...", block.block().fields().header.hash());
+				let pow_hash = block.block().fields().header.hash();
+				let number = block.block().fields().header.number();
+				let difficulty = *block.block().fields().header.difficulty();
 				sealing_work.push(block);
-		}
-
+				Some((pow_hash, difficulty, number))
+			} else {
+				None
+			};
 			trace!(target: "miner", "prepare_sealing: leaving (last={:?})", sealing_work.peek_last_ref().map(|b| b.block().fields().header.hash()));
+			work
+		};
+		work.map(|(pow_hash, difficulty, number)| self.work_poster.as_ref().map(|ref p| p.notify(pow_hash, difficulty, number)));
 	}
 
 	fn update_gas_limit(&self, chain: &MiningBlockChainClient) {
@@ -565,7 +584,7 @@ impl MinerService for Miner {
 			let current_no = chain.chain_info().best_block_number;
 			let has_local_transactions = self.transaction_queue.lock().unwrap().has_local_pending_transactions();
 			let last_request = *self.sealing_block_last_request.lock().unwrap();
-			let should_disable_sealing = !self.options.force_sealing
+			let should_disable_sealing = !self.forced_sealing()
 				&& !has_local_transactions
 				&& current_no > last_request
 				&& current_no - last_request > SEALING_TIMEOUT_IN_BLOCKS;

ethcore/src/miner/mod.rs

@@ -45,6 +45,7 @@
 mod miner;
 mod external;
 mod transaction_queue;
+mod work_notify;
 
 pub use self::transaction_queue::{TransactionQueue, AccountDetails, TransactionImportResult, TransactionOrigin};
 pub use self::miner::{Miner, MinerOptions, PendingSet};

ethcore/src/miner/work_notify.rs

@@ -0,0 +1,105 @@
+// 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/>.
+
+extern crate hyper;
+
+use hyper::header::ContentType;
+use hyper::method::Method;
+use hyper::client::{Request, Response, Client};
+use hyper::{Next};
+use hyper::net::HttpStream;
+use ethash::SeedHashCompute;
+use hyper::Url;
+use util::*;
+use ethereum::ethash::Ethash;
+
+pub struct WorkPoster {
+	urls: Vec<Url>,
+	client: Mutex<Client<PostHandler>>,
+	seed_compute: Mutex<SeedHashCompute>,
+}
+
+impl WorkPoster {
+	pub fn new(urls: &[String]) -> Self {
+		let urls = urls.into_iter().filter_map(|u| {
+			match Url::parse(&u) {
+				Ok(url) => Some(url),
+				Err(e) => {
+					warn!("Error parsing URL {} : {}", u, e);
+					None
+				}
+			}
+		}).collect();
+		let client = Client::<PostHandler>::configure()
+			.keep_alive(false)
+			.build().expect("Error creating HTTP client");
+		WorkPoster {
+			client: Mutex::new(client),
+			urls: urls,
+			seed_compute: Mutex::new(SeedHashCompute::new()),
+		}
+	}
+
+	pub fn notify(&self, pow_hash: H256, difficulty: U256, number: u64) {
+		// TODO: move this to engine
+		let target = Ethash::difficulty_to_boundary(&difficulty);
+		let seed_hash = &self.seed_compute.lock().unwrap().get_seedhash(number);
+		let seed_hash = H256::from_slice(&seed_hash[..]);
+		let body = format!(r#"{{ "result": ["0x{}","0x{}","0x{}","0x{:x}"] }}"#,
+			pow_hash.hex(), seed_hash.hex(), target.hex(), number);
+		let client = self.client.lock().unwrap();
+		for u in &self.urls {
+			if let Err(e) = client.request(u.clone(), PostHandler { body: body.clone() }) {
+				warn!("Error sending HTTP notification to {} : {}", u, e);
+			}
+		}
+	}
+}
+
+struct PostHandler {
+	body: String,
+}
+
+impl hyper::client::Handler<HttpStream> for PostHandler {
+	fn on_request(&mut self, request: &mut Request) -> Next {
+		request.set_method(Method::Post);
+		request.headers_mut().set(ContentType::json());
+		Next::write()
+	}
+
+	fn on_request_writable(&mut self, encoder: &mut hyper::Encoder<HttpStream>) -> Next {
+		if let Err(e) = encoder.write_all(self.body.as_bytes()) {
+			trace!("Error posting work data: {}", e);
+		}
+		encoder.close();
+		Next::read()
+
+	}
+
+	fn on_response(&mut self, _response: Response) -> Next {
+		Next::end()
+	}
+
+	fn on_response_readable(&mut self, _decoder: &mut hyper::Decoder<HttpStream>) -> Next {
+        Next::end()
+	}
+
+    fn on_error(&mut self, err: hyper::Error) -> Next {
+		trace!("Error posting work data: {}", err);
+		Next::end()
+    }
+}
+

parity/cli.rs

@@ -322,7 +322,7 @@ pub struct Args {
 	pub flag_gas_cap: String,
 	pub flag_extra_data: Option<String>,
 	pub flag_tx_queue_size: usize,
-	pub flag_work_notify: Option<String>,
+	pub flag_notify_work: Option<String>,
 	pub flag_logging: Option<String>,
 	pub flag_version: bool,
 	pub flag_from: String,

parity/configuration.rs

@@ -84,8 +84,8 @@ impl Configuration {
 		)
 	}
 
-	pub fn work_notify(&self) -> Vec<String> {
-		self.args.flag_work_notify.as_ref().map_or_else(Vec::new, |s| s.split(',').map(|s| s.to_owned()).collect())
+	fn work_notify(&self) -> Vec<String> {
+		self.args.flag_notify_work.as_ref().map_or_else(Vec::new, |s| s.split(',').map(|s| s.to_owned()).collect())
 	}
 
 	pub fn miner_options(&self) -> MinerOptions {