Added hi redis parser

redis_clone/parser/base.py

@@ -0,0 +1,7 @@
+from abc import ABC, abstractmethod
+from typing import Tuple, List, AnyStr
+
+class BaseParser(ABC):
+    @abstractmethod
+    def parse(self, data, *args, **kwargs) -> Tuple[AnyStr, List[AnyStr]]:
+        pass

redis_clone/parser/hi_redis_parser.py

@@ -0,0 +1,18 @@
+from hiredis import Reader
+
+from redis_clone.parser.base import BaseParser
+
+
+class HiRedisParser(BaseParser):
+    def __init__(self):
+        self.reader_class = Reader
+
+    def parse(self, data, *args, **kwargs):
+        reader = self.reader_class(*args, **kwargs)
+        reader.feed(data)
+        if data := reader.gets():
+            command = data[0]
+            arguments = data[1:]
+            return command, arguments
+
+        raise Exception("Invalid data received")

redis_clone/redis_parser.py → redis_clone/parser/redis_parser.py

@@ -1,5 +1,7 @@
 from enum import Enum
 
+from redis_clone.parser.base import BaseParser
+
 PROTOCOL_SEPARATOR = b'\r\n'
 
 COMMANDS_METADATA = {
@@ -31,11 +33,11 @@ class Protocol_2_Data_Types(Enum):
     ARRAY = b"*"
 
 
-class Parser:
+class Parser(BaseParser):
     def __init__(self, protocol_version) -> None:
         self.protocol_version = protocol_version
 
-    def parse_client_request(self, data):
+    def parse(self, data, *args, **kwargs):
         """
         This function parses the client request and returns the command name and arguments
         """

redis_clone/response_builder.py

@@ -1,4 +1,4 @@
-from redis_clone.redis_parser import Protocol_2_Data_Types, PROTOCOL_SEPARATOR
+from redis_clone.parser.redis_parser import Protocol_2_Data_Types, PROTOCOL_SEPARATOR
 
 
 class ResponseBuilder:

redis_clone/server.py

@@ -1,18 +1,19 @@
 import time
-import sys
 import os
 import asyncio
 import logging
 
 
 from enum import Enum
-from redis_clone.redis_parser import Parser, Protocol_2_Data_Types
+from hiredis import Reader
+from redis_clone.parser.redis_parser import Parser, Protocol_2_Data_Types
+from redis_clone.parser.hi_redis_parser import HiRedisParser
 from redis_clone.response_builder import ResponseBuilder
 
 logger = logging.getLogger(__name__)
 
 HOST = os.environ.get("REDIS_HOST", "0.0.0.0")
-PORT = os.environ.get("REDIS_PORT", 9999)
+PORT = int(os.environ.get("REDIS_PORT", 9999))
 
 
 class Protocol_2_Commands(Enum):
@@ -94,7 +95,7 @@ async def _handle_connection(self, reader, writer):
                 break
 
             logger.info(f"Received data: {data}")
-            command_name, command_args = self.parser.parse_client_request(data)
+            command_name, command_args = self.parser.parse(data, encoding="utf-8", errors="strict")
             logger.info(f"Command name: {command_name}")
             logger.info(f"Command args: {command_args}")
             response = self._process_command(command_name, command_args)

requirements-dev.txt

@@ -1,5 +1,6 @@
 async-timeout==4.0.3
 exceptiongroup==1.1.3
+hiredis==2.3.2
 iniconfig==2.0.0
 packaging==23.2
 pluggy==1.3.0

tests/test_client_parser.py

@@ -1,5 +1,5 @@
 # Using pytest for tests
-from redis_clone.redis_parser import Parser, Protocol_2_Data_Types
+from redis_clone.parser.redis_parser import Parser, Protocol_2_Data_Types
 
 
 class TestParserClient:
@@ -11,7 +11,7 @@ def test_initial_command_request(self):
 
         # Test initial connection
         test_str = b"*1\r\n$7\r\nCOMMAND\r\n"
-        command, args = self.parser.parse_client_request(test_str)
+        command, args = self.parser.parse(test_str)
 
         assert command == "COMMAND"
         assert args == []
@@ -21,7 +21,7 @@ def test_set_command_request(self):
         Test SET command request
         """
         test_str = b"*3\r\n$3\r\nSET\r\n$5\r\nmykey\r\n$7\r\nmyvalue\r\n"
-        command, args = self.parser.parse_client_request(test_str)
+        command, args = self.parser.parse(test_str)
 
         assert command == "SET"
         assert args == ["mykey", "myvalue"]
@@ -31,7 +31,7 @@ def test_get_command_request(self):
         Test GET command request
         """
         test_str = b"*2\r\n$3\r\nGET\r\n$5\r\nmykey\r\n"
-        command, args = self.parser.parse_client_request(test_str)
+        command, args = self.parser.parse(test_str)
 
         assert command == "GET"
         assert args == ["mykey"]
@@ -42,7 +42,7 @@ def test_subargs_parsing(self):
         eg: SET mykey myvalue EX 10 NX
         '''
         test_str = b"*6\r\n$3\r\nSET\r\n$5\r\nmykey\r\n$7\r\nmyvalue\r\n$2\r\nEX\r\n$2\r\n10\r\n$2\r\nNX\r\n"
-        command, args = self.parser.parse_client_request(test_str)
+        command, args = self.parser.parse(test_str)
 
         print(args)
         assert command == "SET"