use reqwest instead of jsonrpc http implementation

Author: Conor Patrick

client/Cargo.toml

@@ -23,7 +23,8 @@ bitcoincore-rpc-json = { version = "0.16.0", path = "../json" }
 
 log = "0.4.5"
 jsonrpc = "0.13.0"
+reqwest = { version = "0.11", features = ["blocking", "json"] }
 
 # Used for deserialization of JSON.
 serde = "1"
-serde_json = "1"
+serde_json  = {version = "1", features = ["raw_value"]}

client/src/client.rs

@@ -12,10 +12,11 @@ use std::collections::HashMap;
 use std::fs::File;
 use std::iter::FromIterator;
 use std::path::PathBuf;
+use std::str::FromStr;
+use std::sync::atomic;
 use std::{fmt, result};
 
 use crate::{bitcoin, deserialize_hex};
-use jsonrpc;
 use serde;
 use serde_json;
 
@@ -1195,7 +1196,10 @@ pub trait RpcApi: Sized {
 
 /// Client implements a JSON-RPC client for the Bitcoin Core daemon or compatible APIs.
 pub struct Client {
-    client: jsonrpc::client::Client,
+    client: reqwest::blocking::Client,
+    url: String,
+    auth: Auth,
+    nonce: atomic::AtomicUsize,
 }
 
 impl fmt::Debug for Client {
@@ -1209,23 +1213,27 @@ impl Client {
     ///
     /// Can only return [Err] when using cookie authentication.
     pub fn new(url: &str, auth: Auth) -> Result<Self> {
-        let (user, pass) = auth.get_user_pass()?;
-        jsonrpc::client::Client::simple_http(url, user, pass)
-            .map(|client| Client {
-                client,
-            })
-            .map_err(|e| super::error::Error::JsonRpc(e.into()))
+        let client = reqwest::blocking::Client::builder().build().map_err(|e| super::error::Error::Http(e))?;
+        Ok(Self{
+            client,
+            auth: auth,
+            url: String::from_str(url).unwrap(),
+            nonce: atomic::AtomicUsize::new(1),
+        })
     }
 
     /// Create a new Client using the given [jsonrpc::Client].
-    pub fn from_jsonrpc(client: jsonrpc::client::Client) -> Client {
+    pub fn from_reqwest(client: reqwest::blocking::Client, url: &str) -> Client {
         Client {
             client,
+            url: String::from_str(url).unwrap(),
+            auth: Auth::None,
+            nonce: atomic::AtomicUsize::new(1),
         }
     }
 
     /// Get the underlying JSONRPC client.
-    pub fn get_jsonrpc_client(&self) -> &jsonrpc::client::Client {
+    pub fn get_reqwest_client(&self) -> &reqwest::blocking::Client {
         &self.client
     }
 }
@@ -1245,14 +1253,45 @@ impl RpcApi for Client {
             })
             .map(|a| a.map_err(|e| Error::Json(e)))
             .collect::<Result<Vec<_>>>()?;
-        let req = self.client.build_request(&cmd, &raw_args);
-        if log_enabled!(Debug) {
-            debug!(target: "bitcoincore_rpc", "JSON-RPC request: {} {}", cmd, serde_json::Value::from(args));
+
+        let nonce = self.nonce.fetch_add(1, atomic::Ordering::Relaxed);
+        let body = jsonrpc::Request{
+            method: cmd,
+            params: raw_args.as_slice(),
+            id: serde_json::Value::from(nonce),
+            jsonrpc: Some("2.0"),
+        };
+        let id = body.id.clone();
+        let mut request = self.client
+            .post(self.url.as_str())
+            .body(serde_json::to_vec(&body)?);
+
+
+        request = match &self.auth {
+            Auth::UserPass(user, pass) => request.basic_auth(user, Some(pass)),
+            Auth::CookieFile(_)=> {
+                let (user, pass) = self.auth.clone().get_user_pass()?;
+                request.basic_auth(user.unwrap(), pass)
+            }
+            Auth::None => request,
+        };
+
+        let response = request.send();
+
+        let response = response.map_err(|e| Error::Http(e))?;
+        let buffer = response.bytes().unwrap();
+        let jsonrpc_response_maybe: Result<jsonrpc::Response> = serde_json::from_slice(&buffer).map_err(|e| Error::Json(e));
+        log_response(cmd, &jsonrpc_response_maybe);
+        let jsonrpc_response = jsonrpc_response_maybe?;
+
+        if jsonrpc_response.jsonrpc.is_some() && jsonrpc_response.jsonrpc != Some(From::from("2.0")) {
+            return Err(Error::JsonRpc(jsonrpc::error::Error::VersionMismatch));
+        }
+        if jsonrpc_response.id != id {
+            return Err(Error::JsonRpc(jsonrpc::error::Error::NonceMismatch));
         }
 
-        let resp = self.client.send_request(req).map_err(Error::from);
-        log_response(cmd, &resp);
-        Ok(resp?.result()?)
+        jsonrpc_response.result().map_err(Error::JsonRpc)
     }
 }
 

client/src/error.rs

@@ -13,13 +13,13 @@ use std::{error, fmt, io};
 use crate::bitcoin;
 use crate::bitcoin::hashes::hex;
 use crate::bitcoin::secp256k1;
-use jsonrpc;
 use serde_json;
 
 /// The error type for errors produced in this library.
 #[derive(Debug)]
 pub enum Error {
     JsonRpc(jsonrpc::error::Error),
+    Http(reqwest::Error),
     Hex(hex::Error),
     Json(serde_json::error::Error),
     BitcoinSerialization(bitcoin::consensus::encode::Error),
@@ -79,6 +79,7 @@ impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {
             Error::JsonRpc(ref e) => write!(f, "JSON-RPC error: {}", e),
+            Error::Http(ref e) => write!(f, "HTTP error: {}", e),
             Error::Hex(ref e) => write!(f, "hex decode error: {}", e),
             Error::Json(ref e) => write!(f, "JSON error: {}", e),
             Error::BitcoinSerialization(ref e) => write!(f, "Bitcoin serialization error: {}", e),