X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning-block-sync%2Fsrc%2Frest.rs;h=4300893013c06d7a3ee81c715b256066f4d28333;hb=4938be6ad715d3474c6bd13c914fd05490e6a649;hp=3ccd5d482e48290e46007ebf16379a87aceeecc9;hpb=6ca3b8ed496290cd9b6c49525d57a887a735a914;p=rust-lightning

diff --git a/lightning-block-sync/src/rest.rs b/lightning-block-sync/src/rest.rs
index 3ccd5d48..43008930 100644
--- a/lightning-block-sync/src/rest.rs
+++ b/lightning-block-sync/src/rest.rs
@@ -1,27 +1,62 @@
-use crate::http::{HttpEndpoint, HttpClient};
+//! Simple REST client implementation which implements [`BlockSource`] against a Bitcoin Core REST
+//! endpoint.
+
+use crate::{BlockData, BlockHeaderData, BlockSource, AsyncBlockSourceResult};
+use crate::http::{BinaryResponse, HttpEndpoint, HttpClient, JsonResponse};
+
+use bitcoin::hash_types::BlockHash;
+use bitcoin::hashes::hex::ToHex;
 
 use std::convert::TryFrom;
 use std::convert::TryInto;
+use std::sync::Mutex;
 
 /// A simple REST client for requesting resources using HTTP `GET`.
 pub struct RestClient {
 	endpoint: HttpEndpoint,
-	client: HttpClient,
+	client: Mutex<Option<HttpClient>>,
 }
 
 impl RestClient {
 	/// Creates a new REST client connected to the given endpoint.
+	///
+	/// The endpoint should contain the REST path component (e.g., http://127.0.0.1:8332/rest).
 	pub fn new(endpoint: HttpEndpoint) -> std::io::Result<Self> {
-		let client = HttpClient::connect(&endpoint)?;
-		Ok(Self { endpoint, client })
+		Ok(Self { endpoint, client: Mutex::new(None) })
 	}
 
 	/// Requests a resource encoded in `F` format and interpreted as type `T`.
-	async fn request_resource<F, T>(&mut self, resource_path: &str) -> std::io::Result<T>
+	pub async fn request_resource<F, T>(&self, resource_path: &str) -> std::io::Result<T>
 	where F: TryFrom<Vec<u8>, Error = std::io::Error> + TryInto<T, Error = std::io::Error> {
 		let host = format!("{}:{}", self.endpoint.host(), self.endpoint.port());
 		let uri = format!("{}/{}", self.endpoint.path().trim_end_matches("/"), resource_path);
-		self.client.get::<F>(&uri, &host).await?.try_into()
+		let mut client = if let Some(client) = self.client.lock().unwrap().take() { client }
+			else { HttpClient::connect(&self.endpoint)? };
+		let res = client.get::<F>(&uri, &host).await?.try_into();
+		*self.client.lock().unwrap() = Some(client);
+		res
+	}
+}
+
+impl BlockSource for RestClient {
+	fn get_header<'a>(&'a self, header_hash: &'a BlockHash, _height: Option<u32>) -> AsyncBlockSourceResult<'a, BlockHeaderData> {
+		Box::pin(async move {
+			let resource_path = format!("headers/1/{}.json", header_hash.to_hex());
+			Ok(self.request_resource::<JsonResponse, _>(&resource_path).await?)
+		})
+	}
+
+	fn get_block<'a>(&'a self, header_hash: &'a BlockHash) -> AsyncBlockSourceResult<'a, BlockData> {
+		Box::pin(async move {
+			let resource_path = format!("block/{}.bin", header_hash.to_hex());
+			Ok(BlockData::FullBlock(self.request_resource::<BinaryResponse, _>(&resource_path).await?))
+		})
+	}
+
+	fn get_best_block<'a>(&'a self) -> AsyncBlockSourceResult<'a, (BlockHash, Option<u32>)> {
+		Box::pin(async move {
+			Ok(self.request_resource::<JsonResponse, _>("chaininfo.json").await?)
+		})
 	}
 }
 
@@ -49,10 +84,10 @@ mod tests {
 	#[tokio::test]
 	async fn request_unknown_resource() {
 		let server = HttpServer::responding_with_not_found();
-		let mut client = RestClient::new(server.endpoint()).unwrap();
+		let client = RestClient::new(server.endpoint()).unwrap();
 
 		match client.request_resource::<BinaryResponse, u32>("/").await {
-			Err(e) => assert_eq!(e.kind(), std::io::ErrorKind::NotFound),
+			Err(e) => assert_eq!(e.kind(), std::io::ErrorKind::Other),
 			Ok(_) => panic!("Expected error"),
 		}
 	}
@@ -60,7 +95,7 @@ mod tests {
 	#[tokio::test]
 	async fn request_malformed_resource() {
 		let server = HttpServer::responding_with_ok(MessageBody::Content("foo"));
-		let mut client = RestClient::new(server.endpoint()).unwrap();
+		let client = RestClient::new(server.endpoint()).unwrap();
 
 		match client.request_resource::<BinaryResponse, u32>("/").await {
 			Err(e) => assert_eq!(e.kind(), std::io::ErrorKind::InvalidData),
@@ -71,7 +106,7 @@ mod tests {
 	#[tokio::test]
 	async fn request_valid_resource() {
 		let server = HttpServer::responding_with_ok(MessageBody::Content(42));
-		let mut client = RestClient::new(server.endpoint()).unwrap();
+		let client = RestClient::new(server.endpoint()).unwrap();
 
 		match client.request_resource::<BinaryResponse, u32>("/").await {
 			Err(e) => panic!("Unexpected error: {:?}", e),