Client also handle error message if id is null (#196)

* Client also handle error message if id is null

* Reduce compiler warnings in testethcalls

* Fix gcsafe error

json_rpc/client.nim

@@ -84,23 +84,27 @@ proc processMessage*(client: RpcClient, line: string): Result[void, string] =
       return err("missing or invalid `jsonrpc`")
 
     if response.id.isNone:
-      return err("missing or invalid response id")
+      if response.error.isSome:
+        let error = JrpcSys.encode(response.error.get)
+        return err(error)
+      else:
+        return err("missing or invalid response id")
 
     var requestFut: Future[JsonString]
     let id = response.id.get
     if not client.awaiting.pop(id, requestFut):
       let msg = "Cannot find message id \"" & $id & "\":"
       requestFut.fail(newException(JsonRpcError, msg))
       return ok()
-  
+
     if response.error.isSome:
       let error = JrpcSys.encode(response.error.get)
       requestFut.fail(newException(JsonRpcError, error))
       return ok()
 
-    # Up to this point, the result should contains something    
-    if response.result.string.len == 0:      
-      let msg = "missing or invalid response result" 
+    # Up to this point, the result should contains something
+    if response.result.string.len == 0:
+      let msg = "missing or invalid response result"
       requestFut.fail(newException(JsonRpcError, msg))
       return ok()
 

json_rpc/clients/httpclient.nim

@@ -152,6 +152,7 @@ method call*(client: RpcHttpClient, name: string,
   if msgRes.isErr:
     # Need to clean up in case the answer was invalid
     debug "Failed to process POST Response for JSON-RPC", msg = msgRes.error
+    newFut.cancelSoon()
     client.awaiting.del(id)
     closeRefs()
     raise newException(JsonRpcError, msgRes.error)

tests/testethcalls.nim

@@ -28,7 +28,7 @@ var
 server.addEthRpcs()
 
 ## Generate client convenience marshalling wrappers from forward declarations
-createRpcSigs(RpcSocketClient, sourceDir & "/private/ethcallsigs.nim")
+createRpcSigs(RpcClient, sourceDir & "/private/ethcallsigs.nim")
 
 func rpcDynamicName(name: string): string =
   "rpc." & name
@@ -43,48 +43,63 @@ server.rpc(rpcDynamicName "testReturnUint256") do() -> UInt256:
   let r: UInt256 = "0x1234567890abcdef".parse(UInt256, 16)
   return r
 
-proc testLocalCalls: Future[seq[JsonString]] =
+proc testLocalCalls(server: RpcServer): Future[seq[JsonString]] {.async.} =
   ## Call RPCs created with `rpc` locally.
   ## This simply demonstrates async calls of the procs generated by the `rpc` macro.
   let
     uint256Param =  server.executeMethod("rpc.uint256Param", %[%"0x1234567890"])
     returnUint256 = server.executeMethod("rpc.testReturnUint256", %[])
-  return all(uint256Param, returnUint256)
 
-proc testRemoteUInt256: Future[seq[JsonString]] =
+  await noCancel(allFutures(uint256Param, returnUint256))
+  var pending: seq[JsonString]
+  pending.add uint256Param.read()
+  pending.add returnUint256.read()
+  return pending
+
+proc testRemoteUInt256(client: RpcClient): Future[seq[JsonString]] {.async.} =
   ## Call function remotely on server, testing `stint` types
   let
     uint256Param =  client.call("rpc.uint256Param", %[%"0x1234567890"])
     returnUint256 = client.call("rpc.testReturnUint256", %[])
-  return all(uint256Param, returnUint256)
 
-proc testSigCalls: Future[seq[string]] =
+  await noCancel(allFutures(uint256Param, returnUint256))
+  var pending: seq[JsonString]
+  pending.add uint256Param.read()
+  pending.add returnUint256.read()
+  return pending
+
+proc testSigCalls(client: RpcClient): Future[seq[string]] {.async.} =
   ## Remote call using proc generated from signatures in `ethcallsigs.nim`
   let
     version = client.web3_clientVersion()
     sha3 = client.web3_sha3("0x68656c6c6f20776f726c64")
-  return all(version, sha3)
+
+  await noCancel(allFutures(version, sha3))
+  var pending: seq[string]
+  pending.add version.read()
+  pending.add sha3.read()
+  return pending
 
 server.start()
 waitFor client.connect(server.localAddress()[0])
 
 
 suite "Local calls":
-  let localResults = testLocalCalls().waitFor
+  let localResults = testLocalCalls(server).waitFor
   test "UInt256 param local":
     check localResults[0] == %"0x1234567891"
   test "Return UInt256 local":
     check localResults[1] == %"0x1234567890abcdef"
 
 suite "Remote calls":
-  let remoteResults = testRemoteUInt256().waitFor
+  let remoteResults = testRemoteUInt256(client).waitFor
   test "UInt256 param":
     check remoteResults[0] == %"0x1234567891"
   test "Return UInt256":
     check remoteResults[1] == %"0x1234567890abcdef"
 
 suite "Generated from signatures":
-  let sigResults = testSigCalls().waitFor
+  let sigResults = testSigCalls(client).waitFor
   test "Version":
     check sigResults[0] == "Nimbus-RPC-Test"
   test "SHA3":