--- /dev/null
+#!/usr/bin/python3
+import serial
+
+import re
+import os
+
+from time import sleep
+import sys
+import logging
+
+logger = logging.getLogger("nitsi.serial")
+
+class serial_connection():
+ def __init__(self, device, username=None):
+ self.buffer = b""
+ self.back_at_prompt_pattern = None
+ self.username = username
+ self.log = logger.getChild(os.path.basename(device))
+ self.log.setLevel(logging.INFO)
+ self.con = serial.Serial(device)
+
+ def read(self, size=1):
+ if len(self.buffer) >= size:
+ # throw away first size bytes in buffer
+ data = self.buffer[:size]
+ # Set the buffer to the non used bytes
+ self.buffer = self.buffer[size:]
+ return data
+ else:
+ data = self.buffer
+ # Set the size to the value we have to read now
+ size = size - len(self.buffer)
+ # Set the buffer empty
+ self.buffer = b""
+ return data + self.con.read(size)
+
+ def peek(self, size=1):
+ if len(self.buffer) <= size:
+ self.buffer += self.con.read(size=size - len(self.buffer))
+
+ return self.buffer[:size]
+
+ def readline(self):
+ self.log.debug(self.buffer)
+ self.buffer = self.buffer + self.con.read(self.con.in_waiting)
+ if b"\n" in self.buffer:
+ size = self.buffer.index(b"\n") + 1
+ self.log.debug("We have a whole line in the buffer")
+ self.log.debug(self.buffer)
+ self.log.debug("We split at {}".format(size))
+ data = self.buffer[:size]
+ self.buffer = self.buffer[size:]
+ self.log.debug(data)
+ self.log.debug(self.buffer)
+ return data
+
+ data = self.buffer
+ self.buffer = b""
+ return data + self.con.readline()
+
+ def back_at_prompt(self):
+ data = self.peek()
+ if not data == b"[":
+ return False
+
+ # We need to use self.in_waiting because with self.con.in_waiting we get
+ # not the complete string
+ size = len(self.buffer) + self.in_waiting
+ data = self.peek(size)
+
+
+ if self.back_at_prompt_pattern == None:
+ #self.back_at_prompt_pattern = r"^\[{}@.+\]#".format(self.username)
+ self.back_at_prompt_pattern = re.compile(r"^\[{}@.+\]#".format(self.username), re.MULTILINE)
+
+ if self.back_at_prompt_pattern.search(data.decode()):
+ return True
+ else:
+ return False
+
+ def log_console_line(self, line):
+ self.log.debug("Get in function log_console_line()")
+ sys.stdout.write(line)
+
+ @property
+ def in_waiting(self):
+ in_waiting_before = 0
+ sleep(0.5)
+
+ while in_waiting_before != self.con.in_waiting:
+ in_waiting_before = self.con.in_waiting
+ sleep(0.5)
+
+ return self.con.in_waiting
+
+ def line_in_buffer(self):
+ if b"\n" in self.buffer:
+ return True
+
+ return False
+
+ def print_lines_in_buffer(self):
+ while True:
+ self.log.debug("Fill buffer ...")
+ self.peek(len(self.buffer) + self.in_waiting)
+ self.log.debug("Current buffer length: {}".format(len(self.buffer)))
+ if self.line_in_buffer() == True:
+ while self.line_in_buffer() == True:
+ data = self.readline()
+ self.log_console_line(data.decode())
+ else:
+ self.log.debug("We have printed all lines in the buffer")
+ break
+
+ def login(self, password):
+ if self.username == None:
+ self.log.error("Username cannot be blank")
+ return False
+
+ self.print_lines_in_buffer()
+
+ # Hit enter to see what we get
+ self.con.write(b'\n')
+ # We get two new lines \r\n ?
+ data = self.readline()
+ self.log_console_line(data.decode())
+
+ self.print_lines_in_buffer()
+
+ if self.back_at_prompt():
+ self.log.debug("We are already logged in.")
+ return True
+
+ # Read all line till we get login:
+ while 1:
+ # We need to use self.in_waiting because with self.con.in_waiting we get
+ # not the complete string
+ size = len(self.buffer) + self.in_waiting
+ data = self.peek(size)
+
+ pattern = r"^.*login: "
+ pattern = re.compile(pattern)
+
+ if pattern.search(data.decode()):
+ break
+ else:
+ self.log.debug("The pattern does not match")
+ self.log.debug(self.peek(len(self.buffer) + self.in_waiting))
+ self.log_console_line(self.readline().decode())
+
+ # We can login
+ string = "{}\n".format(self.username)
+ self.con.write(string.encode())
+ self.con.flush()
+ # read the login out of the buffer
+ data = self.readline()
+ self.log.debug("This is the login:{}".format(data))
+ self.log_console_line(data.decode())
+
+ # We need to wait her till we get the full string "Password:"
+ #This is useless but self.in_waiting will wait the correct amount of time
+ size = self.in_waiting
+
+ string = "{}\n".format(password)
+ self.con.write(string.encode())
+ self.con.flush()
+ # Print the 'Password:' line
+ data = self.readline()
+ self.log_console_line(data.decode())
+
+ while not self.back_at_prompt():
+ # This will fail if the login failed so we need to look for the failed keyword
+ data = self.readline()
+ self.log_console_line(data.decode())
+
+ return True
+
+ def write(self, string):
+ self.log.debug(string)
+ self.con.write(string.encode())
+ self.con.flush()
+
+ def command(self, command):
+ self.write("{}; echo \"END: $?\"\n".format(command))
+
+ # We need to read out the prompt for this command first
+ # If we do not do this we will break the loop immediately
+ # because the prompt for this command is still in the buffer
+ data = self.readline()
+ self.log_console_line(data.decode())
+
+ while not self.back_at_prompt():
+ data = self.readline()
+ self.log_console_line(data.decode())
+
+ # We saved our exit code in data (the last line)
+ self.log.debug(data.decode())
+ data = data.decode().replace("END: ", "")
+ self.log.debug(data)
+ self.log.debug(data.strip())
+ return data.strip()
\ No newline at end of file
projects / people / ms / nitsi.git / blobdiff