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# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
#
# SPDX-License-Identifier: LGPL-3.0-only
#
"""Fields description interface class."""
from pprint import pformat
import json
import time
from glances.logger import logger
from glances.compat import iteritems
API_URL = "http://localhost:61208/api/3"
APIDOC_HEADER = """\
.. _api:
API (Restfull/JSON) documentation
=================================
The Glances Restfull/API server could be ran using the following command line:
.. code-block:: bash
# glances -w --disable-webui
Note: Change request URL api/3 by api/2 if you use Glances 2.x.
"""
def indent_stat(stat, indent=' '):
# Indent stats to pretty print it
if isinstance(stat, list) and len(stat) > 1 and isinstance(stat[0], dict):
# Only display two first items
return indent + pformat(stat[0:2]).replace('\n', '\n' + indent).replace("'", '"')
else:
return indent + pformat(stat).replace('\n', '\n' + indent).replace("'", '"')
def print_api_status():
sub_title = 'GET API status'
print(sub_title)
print('-' * len(sub_title))
print('')
print('This entry point should be used to check the API status.')
print('It will return nothing but a 200 return code if everythin is OK.')
print('')
print('Get the Rest API status::')
print('')
print(' # curl -I {}/status'.format(API_URL))
print(indent_stat('HTTP/1.0 200 OK'))
print('')
def print_plugins_list(stat):
sub_title = 'GET plugins list'
print(sub_title)
print('-' * len(sub_title))
print('')
print('Get the plugins list::')
print('')
print(' # curl {}/pluginslist'.format(API_URL))
print(indent_stat(stat))
print('')
def print_plugin_stats(plugin, stat):
sub_title = 'GET {}'.format(plugin)
print(sub_title)
print('-' * len(sub_title))
print('')
print('Get plugin stats::')
print('')
print(' # curl {}/{}'.format(API_URL, plugin))
print(indent_stat(json.loads(stat.get_stats())))
print('')
def print_plugin_description(plugin, stat):
if stat.fields_description:
# For each plugins with a description
print('Fields descriptions:')
print('')
for field, description in iteritems(stat.fields_description):
print(
'* **{}**: {} (unit is *{}*)'.format(
field,
description['description'][:-1]
if description['description'].endswith('.')
else description['description'],
description['unit'],
)
)
print('')
else:
logger.error('No fields_description variable defined for plugin {}'.format(plugin))
def print_plugin_item_value(plugin, stat, stat_export):
item = None
value = None
if isinstance(stat_export, dict):
item = list(stat_export.keys())[0]
value = None
elif isinstance(stat_export, list) and len(stat_export) > 0 and isinstance(stat_export[0], dict):
if 'key' in stat_export[0]:
item = stat_export[0]['key']
else:
item = list(stat_export[0].keys())[0]
if item and stat.get_stats_item(item):
stat_item = json.loads(stat.get_stats_item(item))
if isinstance(stat_item[item], list):
value = stat_item[item][0]
else:
value = stat_item[item]
print('Get a specific field::')
print('')
print(' # curl {}/{}/{}'.format(API_URL, plugin, item))
print(indent_stat(stat_item))
print('')
if item and value and stat.get_stats_value(item, value):
print('Get a specific item when field matchs the given value::')
print('')
print(' # curl {}/{}/{}/{}'.format(API_URL, plugin, item, value))
print(indent_stat(json.loads(stat.get_stats_value(item, value))))
print('')
def print_all():
sub_title = 'GET all stats'
print(sub_title)
print('-' * len(sub_title))
print('')
print('Get all Glances stats::')
print('')
print(' # curl {}/all'.format(API_URL))
print(' Return a very big dictionnary (avoid using this request, performances will be poor)...')
print('')
def print_history(stats):
time.sleep(1)
stats.update()
time.sleep(1)
stats.update()
sub_title = 'GET stats history'
print(sub_title)
print('-' * len(sub_title))
print('')
print('History of a plugin::')
print('')
print(' # curl {}/cpu/history'.format(API_URL))
print(indent_stat(json.loads(stats.get_plugin('cpu').get_stats_history(nb=3))))
print('')
print('Limit history to last 2 values::')
print('')
print(' # curl {}/cpu/history/2'.format(API_URL))
print(indent_stat(json.loads(stats.get_plugin('cpu').get_stats_history(nb=2))))
print('')
print('History for a specific field::')
print('')
print(' # curl {}/cpu/system/history'.format(API_URL))
print(indent_stat(json.loads(stats.get_plugin('cpu').get_stats_history('system'))))
print('')
print('Limit history for a specific field to last 2 values::')
print('')
print(' # curl {}/cpu/system/history'.format(API_URL))
print(indent_stat(json.loads(stats.get_plugin('cpu').get_stats_history('system', nb=2))))
print('')
def print_limits(stats):
sub_title = 'GET limits (used for thresholds)'
print(sub_title)
print('-' * len(sub_title))
print('')
print('All limits/thresholds::')
print('')
print(' # curl {}/all/limits'.format(API_URL))
print(indent_stat(stats.getAllLimitsAsDict()))
print('')
print('Limits/thresholds for the cpu plugin::')
print('')
print(' # curl {}/cpu/limits'.format(API_URL))
print(indent_stat(stats.get_plugin('cpu').limits))
print('')
class GlancesStdoutApiDoc(object):
"""This class manages the fields description display."""
def __init__(self, config=None, args=None):
# Init
self.config = config
self.args = args
def end(self):
pass
def update(self, stats, duration=1):
"""Display issue"""
# Display header
print(APIDOC_HEADER)
# Display API status
print_api_status()
# Display plugins list
print_plugins_list(sorted(stats._plugins))
# Loop over plugins
for plugin in sorted(stats._plugins):
stat = stats.get_plugin(plugin)
stat_export = stat.get_export()
if stat_export is None or stat_export == [] or stat_export == {}:
continue
print_plugin_stats(plugin, stat)
print_plugin_description(plugin, stat)
print_plugin_item_value(plugin, stat, stat_export)
# Get all stats
print_all()
# History
print_history(stats)
# Limits
print_limits(stats)
# Return True to exit directly (no refresh)
return True