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parsers.py
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parsers.py
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# coding: utf-8
# pylint: disable=C0111, C0103
import os
import yaml
from six import print_, iteritems
class Parser(object):
def __init__(self, filepath=None):
self.result = self.parse_file_safe(filepath) if filepath else None
def parse(text, **kwargs):
raise NotImplementedError
def parse_file(self, filepath, **kwargs):
with open(filepath) as file_for_parse:
return self.parse(file_for_parse.read().strip(), **kwargs)
def parse_file_safe(self, filepath, **kwargs):
if os.path.isfile(filepath):
return self.parse_file(filepath, **kwargs)
class YAMLLike(Parser):
@staticmethod
def parse(text):
return yaml.load(text)
class ReductorMirror(Parser):
@staticmethod
def parse(text):
lines = dict((line.split(' ', 1)) for line in text.strip().split('\n'))
for netdev, conf in iteritems(lines):
output = dict()
output['conf'] = dict()
output['conf']['vlan'], output['conf']['ip'] = conf.split()
output['conf']['vlan'] = output['conf']['vlan'] != '-'
if output['conf']['ip'] == '-':
output['conf']['ip'] = ''
lines[netdev] = output
return lines
class DiskInfo(object):
@staticmethod
def invert_dict_nesting(d):
"""
input = {
'x': {'xx': 1, 'yy': 2},
'y': {'xx': 3, 'yy': 4},
}
output = {
'xx': {'x': 1, 'y': 3},
'yy': {'x': 2, 'y': 4},
}
"""
d2 = dict()
for k, v in iteritems(d):
for k2, v2 in iteritems(v):
if not d2.get(k2):
d2[k2] = dict()
d2[k2][k] = v2
return d2
def parse(self, types, sizes, models):
types_data = self.DiskTypesInfo().parse_file_safe(types)
if not types_data:
return
disk_data = {
'type': types_data,
'size': self.DiskSizeInfo(types_data).parse_file_safe(sizes),
'model': self.DiskModelsInfo(types_data).parse_file_safe(models),
}
return self.invert_dict_nesting(disk_data)
class DiskTypesInfo(Parser):
@staticmethod
def parse(text):
types = ['SSD', 'HDD']
if not text:
return dict()
data = yaml.load(text.replace(':', ': ').replace('/sys/block/', '').replace('/queue/rotational', ''))
return dict((k, types[v]) for k, v in iteritems(data))
class DiskSizeInfo(Parser):
def __init__(self, types_data):
self.types_data = set(types_data)
def parse(self, text):
# split grepped text into list
data = (line.split() for line in text.strip().split('\n'))
# remove partitions, we're interested only in disk-drives
data = (line if len(line) == 2 else [line[0], line[2]] for line in data if
set(line).intersection(self.types_data))
return dict((k, int(v)) for v, k in data)
class DiskModelsInfo(Parser):
def __init__(self, types_data):
self.types_data = types_data
def parse(self, text):
lines = [line.split(None, 1) for line in text.strip().split('\n')]
data = dict(line if len(line) == 2 else line + [None] for line in lines)
if data.get('NAME'):
del data['NAME']
return data
class MemInfo(YAMLLike):
keys_required = (
'MemTotal',
'MemFree',
'SwapTotal',
'SwapFree',
)
def parse(self, text):
return dict((k, int(v.replace(' kB', ''))) for k, v in iteritems(yaml.load(text)) if k in self.keys_required)
class MemInfoDMIDevice(object):
def __init__(self, text):
self.data = {
'speed': 0,
'type': 'RAM',
'size': 0,
}
self.type = 'RAM'
self.handle = None
self.size = 0
self.parse_text(text)
def parse_text(self, text):
""" Разбор описания плашки памяти от dmidecode """
for line in map(str.strip, text.split('\n')):
self.parse_line(line)
def parse_line(self, line):
for key in ('Speed', 'Type', 'Size'):
if line.startswith(key + ':'):
self.data[key.lower()] = line.split()[1]
break
if line.startswith('Handle'):
self.handle = line.split(' ')[1].strip(',')
class MemInfoDMI(Parser):
@staticmethod
def parse(text):
""" Разбор всего вывода dmidecode --type memory """
return MemInfoDMI.__parse(text.split('\n\n')) if text else None
@staticmethod
def __parse(devices):
output = dict()
for device in devices:
if 'Memory Device' in device:
mem_dev = MemInfoDMIDevice(device)
output[mem_dev.handle] = mem_dev.data
return output
class CPULayout(Parser):
@staticmethod
def parse(text):
output = dict((line.strip().split())
for line in text.strip().split('\n'))
if output.get('CPU'):
del output['CPU']
return output
class NetdevParser(Parser):
@staticmethod
def parse(netdev_keys):
"""
:param netdev_keys: list of device names
:return: dict[device_name] = {'vlan': bool; 'ip': ''}
"""
netdevs = dict()
for key in netdev_keys:
if key.count('.') == 1:
dev, _ = key.split('.')
elif key.count('.') == 0:
dev = key
else:
print_('QinQ not supported yet. Device: {0}'.format(key))
raise NotImplementedError
netdevs[dev] = dict()
netdevs[dev]['conf'] = {
'vlan': key.count('.') == 1,
'ip': '',
}
return netdevs
class BridgeOutput(NetdevParser):
@staticmethod
def parse(text):
""" # 0 - id, 1 - dev, 2 - _, 3 - state, 4 - _, 5 - details, 6 - _, 7 - mtu, 8 - _, 9 - master
:param text: # 3: eth1 state DOWN : <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 master br1 state disabled
:return: analyzed netdevs
"""
__dev__ = 1
netdevs_keys = [line.split()[__dev__] for line in text.strip().split('\n')]
return NetdevParser.parse(netdevs_keys)
class EthtoolFiles(NetdevParser):
def parse_file(self, filepath, **kwargs):
return self.parse(os.listdir(filepath))
class EthtoolBuffers(Parser):
@staticmethod
def parse(text):
buffers = [int(line.split()[1])
for line in text.strip().split('\n')
if line.startswith('RX:')]
if buffers and len(buffers) == 2:
return {
'max': buffers[0],
'cur': buffers[1],
}