implement simple serial connector

plugins/serial.py

@@ -0,0 +1,61 @@
+#!/usr/bin/python3
+#
+# serial.py
+# Serial integration plugin for Caterpillar Proxy
+#
+# Caterpillar Proxy - The simple web debugging proxy (formerly, php-httpproxy)
+# Namyheon Go (Catswords Research) <gnh1201@gmail.com>
+# https://github.com/gnh1201/caterpillar
+# Created at: 2024-08-11
+# Updated at: 2024-08-11
+#
+
+import serial
+from decouple import config
+from base import Extension, Logger
+
+logger = Logger(name="serial")
+
+try:
+    client_encoding = config("CLIENT_ENCODING")
+except Exception as e:
+    logger.error("[*] Invalid configuration", exc_info=e)
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+class Serial(Extension):
+    def __init__(self):
+        self.type = "connector"
+        self.connection_type = "serial"
+
+    def dispatch(self, type, id, params, conn):
+        logger.info("[*] Greeting! dispatch")
+        conn.send(b"Greeting! dispatch")
+
+    def connect(self, conn, data, webserver, port, scheme, method, url):
+        connected = False
+        ser = None
+        try:
+            port_path = url.decode(client_encoding).replace('/', '')
+            if not ser:
+                ser = serial.Serial(port_path, baudrate=9600, timeout=2)
+                connected = True
+            logger.debug(f"Connected to {port_path} at 9600 baudrate")
+
+            ser.write(data)
+            logger.debug(f"Data sent to {port_path}: {data}")
+
+            ser_data = ser.read_all()
+            logger.debug(f"Data received: {ser_data}")
+          
+            if ser_data:
+                conn.send(ser_data.decode(client_encoding))
+        except serial.SerialException as e:
+            logger.error(f"Failed to connect to {port}", exc_info=e)
+        finally:
+            if ser and ser.is_open:
+                ser.close()
+            logger.debug(f"Serial port {port_path} closed")
+        return connected