Improved RPC, added threaded RPC with result fetcher

static-data/official-plugins/rpc/longrpc.py

@@ -0,0 +1,41 @@
+"""
+
+"""
+import threading
+import os
+import time
+import traceback
+import collections
+from typing import Union
+
+import ujson
+import jsonrpc
+
+from logger import log as logging
+
+
+rpc_results = collections.deque(maxlen=10000)
+
+def get_results(id) -> Union[str, None]:
+    final = None
+    for result in rpc_results:
+        if str(result['id']) == str(id):
+            final = result
+            break
+    else:
+        return None
+    rpc_results.remove(final)
+    return ujson.dumps(final)
+
+
+def _exec_rpc(rpc_json_str):
+    json_resp = jsonrpc.JSONRPCResponseManager.handle(rpc_json_str, jsonrpc.dispatcher)
+    data = json_resp.data
+    rpc_results.append(data)
+
+def threaded_rpc(rpc_json_str):
+    threading.Thread(
+        target=_exec_rpc, 
+        args=(rpc_json_str,), 
+        daemon=True,
+        name="JSON RPC").start()

static-data/official-plugins/rpc/main.py

@@ -52,18 +52,47 @@ from onionrplugins import plugin_apis
 from rpc import blocks, pluginrpcmethods
 
 from rpc.addmodule import add_module_to_api
+import longrpc
 
 
 plugin_apis['rpc.add_module_to_api'] = add_module_to_api
 
+def _detect_cors_and_add_headers():
+    cherrypy.response.headers['Access-Control-Allow-Headers'] = 'Content-Type'
+    cherrypy.response.headers['Access-Control-Allow-Origin'] = '*'
+    cherrypy.response.headers['Access-Control-Allow-Methods'] = 'POST'
+    if cherrypy.request.method == 'OPTIONS':
+        return True
+    return False
+
 class OnionrRPC(object):
+    @cherrypy.expose
+    def queue_rpc(self):
+        if _detect_cors_and_add_headers():
+            return ''
+        
+        rpc_request_json: str = cherrypy.request.body.read().decode('utf-8')
+        longrpc.threaded_rpc(rpc_request_json)
+        return 'ok'
+
+    @cherrypy.expose
+    def get_rpc_result(self, id=0):
+        if _detect_cors_and_add_headers():
+            return ''
+            
+        results = longrpc.get_results(id)
+        if not results:
+            return '"no result"'
+        return results
+        
     @cherrypy.expose
     def rpc(self):
+        # Basic RPC, intended for small amounts of work
+        # Use /queue_rpc for large workloads like creating blocks
+        # and getting results with /get_rpc_result?id=<id>
         # Dispatcher is dictionary {<method_name>: callable}
         
-        if cherrypy.request.method == 'OPTIONS':
-            cherrypy.response.headers['Access-Control-Allow-Origin'] = '*'
-            cherrypy.response.headers['Access-Control-Allow-Methods'] = 'POST'
+        if _detect_cors_and_add_headers():
             return ''
 
         data = cherrypy.request.body.read().decode('utf-8')
@@ -89,7 +118,10 @@ def on_beforecmdparsing(api, data=None):
 def on_afterinit(api, data=None):
     def ping():
         return "pong"
+    def always_fails():
+        raise Exception("This always fails")
     dispatcher['ping'] = ping
+    dispatcher['always_fails'] = always_fails
     pluginrpcmethods.add_plugin_rpc_methods()
 
 

static-data/official-plugins/rpc/rpc/blocks.py

@@ -19,6 +19,7 @@ def get_blocks(timestamp):
 @dispatcher.add_method
 def create_block(
         block_data: 'base64', block_type: str, ttl: int, metadata: dict):
+    # TODO use a module from an old version to use multiprocessing to avoid blocking GIL
     # Wrapper for onionrblocks.create_block (take base64 to be compatible with RPC)
     bl = onionrblocks.create_anonvdf_block(
         base64.b64decode(block_data), block_type, ttl, **metadata)