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Commit | Line | Data |
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f0f16021 | 1 | #!/usr/bin/python3 |
f0f16021 | 2 | |
6632e137 | 3 | import logging |
1ed8ca9f | 4 | import os |
6632e137 JS |
5 | import re |
6 | import serial | |
f0f16021 | 7 | import sys |
6632e137 | 8 | import time |
1ed8ca9f | 9 | |
b560f31a | 10 | from . import logger |
b4936764 | 11 | |
b560f31a | 12 | log = logging.getLogger("nitsi.serial") |
f0f16021 | 13 | |
ee227ea1 | 14 | class Serial_connection(): |
fc35cba1 | 15 | def __init__(self, device, username=None, log_file=None, name=None, log_start_time=None, longest_machine_name=10): |
f0f16021 JS |
16 | self.buffer = b"" |
17 | self.back_at_prompt_pattern = None | |
18 | self.username = username | |
b4936764 JS |
19 | self.name = name |
20 | self.log_file = log_file | |
b560f31a | 21 | self.log = log.getChild(name) |
5045ec58 | 22 | self.log.setLevel(logging.INFO) |
f0f16021 JS |
23 | self.con = serial.Serial(device) |
24 | ||
b4936764 | 25 | self.log_output = self.log.getChild("output") |
383a38cd JS |
26 | # Do not propagate the output to ancestor loggers as it looks ugly |
27 | self.log_output.propagate = False | |
28 | # Logging handler for file | |
b4936764 JS |
29 | log_file_handler = logging.FileHandler(self.log_file) |
30 | log_file_handler.setLevel(logging.INFO) | |
31 | log_file_handler.terminator = "" | |
383a38cd JS |
32 | # Loggin Handler for Stream |
33 | stream_handler = logging.StreamHandler() | |
34 | stream_handler.setLevel(logging.INFO) | |
35 | stream_handler.terminator = "" | |
b560f31a | 36 | formatter = logger.TestFormatter(name=self.name, |
fc35cba1 JS |
37 | start_time=log_start_time, |
38 | longest_machine_name=longest_machine_name) | |
b4936764 | 39 | log_file_handler.setFormatter(formatter) |
383a38cd | 40 | stream_handler.setFormatter(formatter) |
b4936764 | 41 | self.log_output.addHandler(log_file_handler) |
383a38cd | 42 | self.log_output.addHandler(stream_handler) |
b4936764 | 43 | |
f0f16021 JS |
44 | def read(self, size=1): |
45 | if len(self.buffer) >= size: | |
46 | # throw away first size bytes in buffer | |
47 | data = self.buffer[:size] | |
48 | # Set the buffer to the non used bytes | |
49 | self.buffer = self.buffer[size:] | |
50 | return data | |
51 | else: | |
52 | data = self.buffer | |
53 | # Set the size to the value we have to read now | |
54 | size = size - len(self.buffer) | |
55 | # Set the buffer empty | |
56 | self.buffer = b"" | |
57 | return data + self.con.read(size) | |
58 | ||
59 | def peek(self, size=1): | |
60 | if len(self.buffer) <= size: | |
61 | self.buffer += self.con.read(size=size - len(self.buffer)) | |
62 | ||
63 | return self.buffer[:size] | |
64 | ||
65 | def readline(self): | |
66 | self.log.debug(self.buffer) | |
67 | self.buffer = self.buffer + self.con.read(self.con.in_waiting) | |
68 | if b"\n" in self.buffer: | |
69 | size = self.buffer.index(b"\n") + 1 | |
70 | self.log.debug("We have a whole line in the buffer") | |
71 | self.log.debug(self.buffer) | |
72 | self.log.debug("We split at {}".format(size)) | |
73 | data = self.buffer[:size] | |
74 | self.buffer = self.buffer[size:] | |
75 | self.log.debug(data) | |
76 | self.log.debug(self.buffer) | |
77 | return data | |
78 | ||
79 | data = self.buffer | |
80 | self.buffer = b"" | |
81 | return data + self.con.readline() | |
82 | ||
83 | def back_at_prompt(self): | |
84 | data = self.peek() | |
85 | if not data == b"[": | |
86 | return False | |
87 | ||
88 | # We need to use self.in_waiting because with self.con.in_waiting we get | |
89 | # not the complete string | |
90 | size = len(self.buffer) + self.in_waiting | |
91 | data = self.peek(size) | |
92 | ||
93 | ||
94 | if self.back_at_prompt_pattern == None: | |
95 | #self.back_at_prompt_pattern = r"^\[{}@.+\]#".format(self.username) | |
96 | self.back_at_prompt_pattern = re.compile(r"^\[{}@.+\]#".format(self.username), re.MULTILINE) | |
97 | ||
98 | if self.back_at_prompt_pattern.search(data.decode()): | |
99 | return True | |
100 | else: | |
101 | return False | |
102 | ||
103 | def log_console_line(self, line): | |
104 | self.log.debug("Get in function log_console_line()") | |
b4936764 | 105 | self.log_output.info(line) |
383a38cd | 106 | #sys.stdout.write(line) |
f0f16021 JS |
107 | |
108 | @property | |
109 | def in_waiting(self): | |
110 | in_waiting_before = 0 | |
b560f31a | 111 | time.sleep(0.5) |
f0f16021 JS |
112 | |
113 | while in_waiting_before != self.con.in_waiting: | |
114 | in_waiting_before = self.con.in_waiting | |
b560f31a | 115 | time.sleep(0.5) |
f0f16021 JS |
116 | |
117 | return self.con.in_waiting | |
118 | ||
119 | def line_in_buffer(self): | |
120 | if b"\n" in self.buffer: | |
121 | return True | |
122 | ||
123 | return False | |
124 | ||
125 | def print_lines_in_buffer(self): | |
126 | while True: | |
127 | self.log.debug("Fill buffer ...") | |
128 | self.peek(len(self.buffer) + self.in_waiting) | |
129 | self.log.debug("Current buffer length: {}".format(len(self.buffer))) | |
130 | if self.line_in_buffer() == True: | |
131 | while self.line_in_buffer() == True: | |
132 | data = self.readline() | |
133 | self.log_console_line(data.decode()) | |
134 | else: | |
135 | self.log.debug("We have printed all lines in the buffer") | |
136 | break | |
137 | ||
138 | def login(self, password): | |
139 | if self.username == None: | |
140 | self.log.error("Username cannot be blank") | |
141 | return False | |
142 | ||
143 | self.print_lines_in_buffer() | |
144 | ||
145 | # Hit enter to see what we get | |
146 | self.con.write(b'\n') | |
147 | # We get two new lines \r\n ? | |
148 | data = self.readline() | |
149 | self.log_console_line(data.decode()) | |
150 | ||
151 | self.print_lines_in_buffer() | |
152 | ||
153 | if self.back_at_prompt(): | |
154 | self.log.debug("We are already logged in.") | |
155 | return True | |
156 | ||
157 | # Read all line till we get login: | |
158 | while 1: | |
159 | # We need to use self.in_waiting because with self.con.in_waiting we get | |
160 | # not the complete string | |
161 | size = len(self.buffer) + self.in_waiting | |
162 | data = self.peek(size) | |
163 | ||
164 | pattern = r"^.*login: " | |
165 | pattern = re.compile(pattern) | |
166 | ||
167 | if pattern.search(data.decode()): | |
168 | break | |
169 | else: | |
170 | self.log.debug("The pattern does not match") | |
171 | self.log.debug(self.peek(len(self.buffer) + self.in_waiting)) | |
172 | self.log_console_line(self.readline().decode()) | |
173 | ||
174 | # We can login | |
175 | string = "{}\n".format(self.username) | |
176 | self.con.write(string.encode()) | |
177 | self.con.flush() | |
178 | # read the login out of the buffer | |
179 | data = self.readline() | |
180 | self.log.debug("This is the login:{}".format(data)) | |
181 | self.log_console_line(data.decode()) | |
182 | ||
183 | # We need to wait her till we get the full string "Password:" | |
184 | #This is useless but self.in_waiting will wait the correct amount of time | |
185 | size = self.in_waiting | |
186 | ||
187 | string = "{}\n".format(password) | |
188 | self.con.write(string.encode()) | |
189 | self.con.flush() | |
190 | # Print the 'Password:' line | |
191 | data = self.readline() | |
192 | self.log_console_line(data.decode()) | |
193 | ||
194 | while not self.back_at_prompt(): | |
195 | # This will fail if the login failed so we need to look for the failed keyword | |
196 | data = self.readline() | |
197 | self.log_console_line(data.decode()) | |
198 | ||
199 | return True | |
200 | ||
201 | def write(self, string): | |
202 | self.log.debug(string) | |
203 | self.con.write(string.encode()) | |
204 | self.con.flush() | |
205 | ||
206 | def command(self, command): | |
207 | self.write("{}; echo \"END: $?\"\n".format(command)) | |
208 | ||
209 | # We need to read out the prompt for this command first | |
210 | # If we do not do this we will break the loop immediately | |
211 | # because the prompt for this command is still in the buffer | |
212 | data = self.readline() | |
213 | self.log_console_line(data.decode()) | |
214 | ||
215 | while not self.back_at_prompt(): | |
216 | data = self.readline() | |
217 | self.log_console_line(data.decode()) | |
218 | ||
219 | # We saved our exit code in data (the last line) | |
220 | self.log.debug(data.decode()) | |
221 | data = data.decode().replace("END: ", "") | |
222 | self.log.debug(data) | |
223 | self.log.debug(data.strip()) | |
6632e137 | 224 | return data.strip() |