feat: port locust to use GRPC payloads

bench/locustfile.py

@@ -1,4 +1,5 @@
 import json
+import grpc
 from pprint import pprint
 from locust import FastHttpUser, between, task
 
@@ -103,17 +104,38 @@ import gevent
 import adaptor
 from locust import events, task
 
+host = "localhost:9001"
+captcha_id = "locust"
+
+
+def add_captcha(stub: DcacheServiceStub, captcha_id: str):
+    msg = dcache.AddCaptchaRequest(
+        id=captcha_id,
+        mcaptcha=dcache.MCaptcha(
+            duration=30,
+            defense=dcache.Defense(
+                levels=[
+                    dcache.Level(visitor_threshold=50, difficulty_factor=500),
+                    dcache.Level(visitor_threshold=5000, difficulty_factor=50000),
+                ]
+            ),
+        ),
+    )
+    resp = stub.AddCaptcha(msg)
+    pprint(f"Captcha added {captcha_id}: {resp}")
+
+
+with grpc.insecure_channel(host) as channel:
+    stub = DcacheServiceStub(channel)
+    add_captcha(stub=stub, captcha_id=captcha_id)
+
 
 class HelloGrpcUser(adaptor.GrpcUser):
     stub_class = DcacheServiceStub
-    leader = "localhost:9001"
-    host = leader
-    captcha_id = "locust"
+    host = host
+    captcha_id = captcha_id
     msg = RaftRequest(data=json.dumps({"AddVisitor": captcha_id}))
 
-    def on_start(self):
-        self.add_captcha(captcha_id=self.captcha_id)
-
     def add_vote(self, captcha_id: str):
         resp = self.stub.Write(self.msg)
 
@@ -121,28 +143,6 @@ class HelloGrpcUser(adaptor.GrpcUser):
     #       resp = self.pipeline_write(data=self.pipeline_vote)
     #        pprint(resp)
 
-    def add_captcha(self, captcha_id: str):
-        params = {
-            "AddCaptcha": {
-                "id": captcha_id,
-                "mcaptcha": {
-                    "visitor_threshold": 0,
-                    "defense": {
-                        "levels": [
-                            {"visitor_threshold": 50, "difficulty_factor": 500},
-                            {"visitor_threshold": 5000, "difficulty_factor": 50000},
-                        ],
-                        "current_visitor_threshold": 0,
-                    },
-                    "duration": 30,
-                },
-            }
-        }
-
-        msg = RaftRequest(data=json.dumps(params))
-        resp = self.stub.Write(msg)
-        pprint(f"Captcha added {captcha_id}: {resp}")
-
     @task
     def addVote(self):
         self.add_vote(self.captcha_id)