Merge pull request #33 from avatao-content/message-types

Message types
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therealkrispet 2018-06-04 22:18:25 +02:00 committed by GitHub
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36 changed files with 645 additions and 153 deletions

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@ -10,4 +10,4 @@ pipeline:
- docker push eu.gcr.io/avatao-challengestore/tutorial-framework:${DRONE_TAG}
when:
event: 'tag'
branch: refs/tags/egyptianmau-20*
branch: refs/tags/bombay-20*

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@ -1,5 +1,5 @@
[TYPECHECK]
ignored-modules = zmq
max-line-length = 150
max-line-length = 120
disable = missing-docstring, too-few-public-methods, invalid-name

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@ -80,4 +80,6 @@ The TFW message format:
Most of the components you need have docstrings included (hang on tight, this is work in progress) refer to them for usage info.
In the `docs` folder you can find our Sphinx-based API documentation, which you can build using the included `Makefile` (you need to have Sphinx installed, please reach out to us if you have trouble building the docs).
To get started you should take a look at the [test-tutorial-framework](https://github.com/avatao-content/test-tutorial-framework) repository, which serves as an example project as well.

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@ -1 +1 @@
egyptianmau
bombay

20
docs/Makefile Normal file
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@ -0,0 +1,20 @@
# Minimal makefile for Sphinx documentation
#
# You can set these variables from the command line.
SPHINXOPTS =
SPHINXBUILD = sphinx-build
SPHINXPROJ = baseimage-tutorial-framework
SOURCEDIR = source
BUILDDIR = build
# Put it first so that "make" without argument is like "make help".
help:
@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
.PHONY: help Makefile
# Catch-all target: route all unknown targets to Sphinx using the new
# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS).
%: Makefile
@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

36
docs/make.bat Normal file
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@ -0,0 +1,36 @@
@ECHO OFF
pushd %~dp0
REM Command file for Sphinx documentation
if "%SPHINXBUILD%" == "" (
set SPHINXBUILD=sphinx-build
)
set SOURCEDIR=source
set BUILDDIR=build
set SPHINXPROJ=baseimage-tutorial-framework
if "%1" == "" goto help
%SPHINXBUILD% >NUL 2>NUL
if errorlevel 9009 (
echo.
echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
echo.installed, then set the SPHINXBUILD environment variable to point
echo.to the full path of the 'sphinx-build' executable. Alternatively you
echo.may add the Sphinx directory to PATH.
echo.
echo.If you don't have Sphinx installed, grab it from
echo.http://sphinx-doc.org/
exit /b 1
)
%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
goto end
:help
%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS%
:end
popd

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@ -0,0 +1,25 @@
Components
----------
.. automodule:: tfw.components
.. autoclass:: IdeEventHandler
:members:
.. autoclass:: TerminalEventHandler
:members:
.. autoclass:: ProcessManagingEventHandler
:members:
.. autoclass:: LogMonitoringEventHandler
:members:
.. autoclass:: TerminalCommands
:members:
.. autoclass:: HistoryMonitor
:members:
.. autoclass:: BashMonitor
:members:

166
docs/source/conf.py Normal file
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@ -0,0 +1,166 @@
# -*- coding: utf-8 -*-
#
# Configuration file for the Sphinx documentation builder.
#
# This file does only contain a selection of the most common options. For a
# full list see the documentation:
# http://www.sphinx-doc.org/en/master/config
# -- Path setup --------------------------------------------------------------
# If extensions (or modules to document with autodoc) are in another directory,
# add these directories to sys.path here. If the directory is relative to the
# documentation root, use os.path.abspath to make it absolute, like shown here.
#
import os
import sys
sys.path.insert(0, os.path.abspath('../../lib'))
# -- Project information -----------------------------------------------------
project = 'baseimage-tutorial-framework'
copyright = '2018, Avatao Innovative Learning Kft'
author = 'Kristóf Tóth'
# The short X.Y version
version = ''
# The full version, including alpha/beta/rc tags
release = 'bombay'
# -- General configuration ---------------------------------------------------
# If your documentation needs a minimal Sphinx version, state it here.
#
# needs_sphinx = '1.0'
# Add any Sphinx extension module names here, as strings. They can be
# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
# ones.
extensions = [
'sphinx.ext.autodoc',
]
# Add any paths that contain templates here, relative to this directory.
templates_path = ['_templates']
# The suffix(es) of source filenames.
# You can specify multiple suffix as a list of string:
#
# source_suffix = ['.rst', '.md']
source_suffix = '.rst'
# The master toctree document.
master_doc = 'index'
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This pattern also affects html_static_path and html_extra_path .
exclude_patterns = []
# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'
# -- Options for HTML output -------------------------------------------------
# The theme to use for HTML and HTML Help pages. See the documentation for
# a list of builtin themes.
#
html_theme = 'alabaster'
# Theme options are theme-specific and customize the look and feel of a theme
# further. For a list of options available for each theme, see the
# documentation.
#
# html_theme_options = {}
# Add any paths that contain custom static files (such as style sheets) here,
# relative to this directory. They are copied after the builtin static files,
# so a file named "default.css" will overwrite the builtin "default.css".
html_static_path = ['_static']
# Custom sidebar templates, must be a dictionary that maps document names
# to template names.
#
# The default sidebars (for documents that don't match any pattern) are
# defined by theme itself. Builtin themes are using these templates by
# default: ``['localtoc.html', 'relations.html', 'sourcelink.html',
# 'searchbox.html']``.
#
# html_sidebars = {}
# -- Options for HTMLHelp output ---------------------------------------------
# Output file base name for HTML help builder.
htmlhelp_basename = 'baseimage-tutorial-frameworkdoc'
# -- Options for LaTeX output ------------------------------------------------
latex_elements = {
# The paper size ('letterpaper' or 'a4paper').
#
# 'papersize': 'letterpaper',
# The font size ('10pt', '11pt' or '12pt').
#
# 'pointsize': '10pt',
# Additional stuff for the LaTeX preamble.
#
# 'preamble': '',
# Latex figure (float) alignment
#
# 'figure_align': 'htbp',
}
# Grouping the document tree into LaTeX files. List of tuples
# (source start file, target name, title,
# author, documentclass [howto, manual, or own class]).
latex_documents = [
(master_doc, 'baseimage-tutorial-framework.tex', 'baseimage-tutorial-framework Documentation',
'Kristóf Tóth', 'manual'),
]
# -- Options for manual page output ------------------------------------------
# One entry per manual page. List of tuples
# (source start file, name, description, authors, manual section).
man_pages = [
(master_doc, 'baseimage-tutorial-framework', 'baseimage-tutorial-framework Documentation',
[author], 1)
]
# -- Options for Texinfo output ----------------------------------------------
# Grouping the document tree into Texinfo files. List of tuples
# (source start file, target name, title, author,
# dir menu entry, description, category)
texinfo_documents = [
(master_doc, 'baseimage-tutorial-framework', 'baseimage-tutorial-framework Documentation',
author, 'baseimage-tutorial-framework', 'One line description of project.',
'Miscellaneous'),
]
# -- Extension configuration -------------------------------------------------
def skip(app, what, name, obj, skip, options):
if name == "__init__":
return False
return skip
def setup(app):
app.connect("autodoc-skip-member", skip)

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@ -0,0 +1,12 @@
Event handler base classes
--------------------------
Subclass these to create your cusom event handlers.
.. automodule:: tfw
.. autoclass:: EventHandlerBase
:members:
.. autoclass:: TriggeredEventHandler
:members:

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@ -0,0 +1,12 @@
FSM base classes
----------------
Subclass these to create an FSM that fits your tutorial/challenge.
.. automodule:: tfw
.. autoclass:: FSMBase
:members:
.. autoclass:: LinearFSM
:members:

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@ -0,0 +1,7 @@
TFWServer
---------
.. automodule:: tfw.networking
.. autoclass:: TFWServer
:members:

45
docs/source/index.rst Normal file
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@ -0,0 +1,45 @@
.. baseimage-tutorial-framework documentation master file, created by
sphinx-quickstart on Fri Jun 1 14:29:07 2018.
You can adapt this file completely to your liking, but it should at least
contain the root `toctree` directive.
Welcome to baseimage-tutorial-framework's documentation!
========================================================
Foundations
-----------
This part covers the soil which the framework is based on and stuff you will need to develop your own challenges.
.. toctree::
:glob:
foundations/*
Networking
----------
You can use these to send messages to the frontend or the event handlers through TFWServer.
.. toctree::
:glob:
networking/*
Components
----------
These are pre-written components for you to use, such as our IDE, terminal or console.
.. toctree::
:glob:
components/*
Indices and tables
==================
* :ref:`genindex`
* :ref:`modindex`
* :ref:`search`

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@ -0,0 +1,17 @@
Networking
----------
.. automodule:: tfw.networking
.. autoclass:: TFWServerConnector
:members:
.. automodule:: tfw.networking.event_handlers
.. autoclass:: ServerUplinkConnector
:members:
.. automodule:: tfw.networking
.. autoclass:: MessageSender
:members:

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@ -4,9 +4,22 @@
from collections import namedtuple
from os import environ
from tfw.decorators import lazy_property
def prefixed_envvars_to_namedtuple(prefix: str, tuple_name: str):
envvars = {envvar.replace(prefix, '', 1): environ.get(envvar)
class LazyEnvironment:
def __init__(self, prefix, tuple_name):
self._prefix = prefix
self._tuple_name = tuple_name
@lazy_property
def environment(self):
return self.prefixed_envvars_to_namedtuple()
def prefixed_envvars_to_namedtuple(self):
envvars = {
envvar.replace(self._prefix, '', 1): environ.get(envvar)
for envvar in environ.keys()
if envvar.startswith(prefix)}
return namedtuple(tuple_name, envvars)(**envvars)
if envvar.startswith(self._prefix)
}
return namedtuple(self._tuple_name, envvars)(**envvars)

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@ -1,6 +1,6 @@
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.
from envvars import prefixed_envvars_to_namedtuple
from envvars import LazyEnvironment
TAOENV = prefixed_envvars_to_namedtuple('AVATAO_', 'taoenvtuple')
TAOENV = LazyEnvironment('AVATAO_', 'taoenvtuple').environment

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@ -16,7 +16,6 @@ LOG = logging.getLogger(__name__)
class DirectoryMonitor(ObserverMixin):
def __init__(self, directories):
ObserverMixin.__init__(self)
self.eventhandler = IdeReloadWatchdogEventHandler()
for directory in directories:
self.observer.schedule(self.eventhandler, directory, recursive=True)
@ -65,8 +64,10 @@ class IdeReloadWatchdogEventHandler(FileSystemWatchdogEventHandler):
self.ignore = self.ignore - 1
return
LOG.debug(event)
self.uplink.send({'key': 'ide',
'data': {'command': 'reload'}})
self.uplink.send({
'key': 'ide',
'data': {'command': 'reload'}
})
def with_monitor_paused(fun):

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@ -17,10 +17,12 @@ class DirectoryMonitoringEventHandler(EventHandlerBase, MonitorManagerMixin):
self._directory = directory
MonitorManagerMixin.__init__(self, DirectoryMonitor, self._directory)
self.commands = {'pause': self.pause,
self.commands = {
'pause': self.pause,
'resume': self.resume,
'ignore': self.ignore,
'selectdir': self.selectdir}
'selectdir': self.selectdir
}
@property
def directory(self):

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@ -36,15 +36,17 @@ class HistoryMonitor(CallbackMixin, ObserverMixin, ABC):
See examples below.
"""
def __init__(self, histfile):
CallbackMixin.__init__(self)
ObserverMixin.__init__(self)
self.histfile = histfile
self._history = []
self._last_length = len(self._history)
self.observer.schedule(CallbackEventHandler([self.histfile],
self.observer.schedule(
CallbackEventHandler(
[self.histfile],
self._fetch_history,
self._invoke_callbacks),
dirname(self.histfile))
self._invoke_callbacks
),
dirname(self.histfile)
)
@property
def history(self):
@ -55,7 +57,10 @@ class HistoryMonitor(CallbackMixin, ObserverMixin, ABC):
with open(self.histfile, 'r') as ifile:
pattern = compileregex(self.command_pattern)
data = ifile.read()
self._history = [self.sanitize_command(command) for command in findall(pattern, data)]
self._history = [
self.sanitize_command(command)
for command in findall(pattern, data)
]
@property
@abstractmethod

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@ -41,8 +41,8 @@ class FileManager: # pylint: disable=too-many-instance-attributes
def workdir(self, directory):
if not exists(directory) or not isdir(directory):
raise EnvironmentError(f'"{directory}" is not a directory!')
if not self._is_in_whitelisted_dir(directory):
raise EnvironmentError(f'Directory "{directory}" is not in whitelist!')
if not self._is_in_allowed_dir(directory):
raise EnvironmentError(f'Directory "{directory}" is not allowed!')
self._workdir = directory
@property
@ -65,8 +65,13 @@ class FileManager: # pylint: disable=too-many-instance-attributes
@property
def files(self):
return [self._relpath(file) for file in glob(join(self._workdir, '**/*'), recursive=True)
if isfile(file) and self._is_in_whitelisted_dir(file) and not self._is_blacklisted(file)]
return [
self._relpath(file)
for file in glob(join(self._workdir, '**/*'), recursive=True)
if isfile(file)
and self._is_in_allowed_dir(file)
and not self._is_blacklisted(file)
]
@property
def file_contents(self):
@ -78,11 +83,17 @@ class FileManager: # pylint: disable=too-many-instance-attributes
with open(self._filepath(self.filename), 'w', errors='surrogateescape') as ofile:
ofile.write(value)
def _is_in_whitelisted_dir(self, path):
return any(realpath(path).startswith(allowed_dir) for allowed_dir in self.allowed_directories)
def _is_in_allowed_dir(self, path):
return any(
realpath(path).startswith(allowed_dir)
for allowed_dir in self.allowed_directories
)
def _is_blacklisted(self, file):
return any(fnmatchcase(file, blacklisted) for blacklisted in self.exclude)
return any(
fnmatchcase(file, blacklisted)
for blacklisted in self.exclude
)
def _filepath(self, filename):
return join(self._workdir, filename)
@ -101,45 +112,51 @@ class IdeEventHandler(EventHandlerBase, MonitorManagerMixin):
When any file in the selected directory changes they are automatically refreshed
on the frontend (this is done by listening to inotify events).
This EventHandler accepts messages that have a data["command"] key specifying
This EventHandler accepts messages that have a data['command'] key specifying
a command to be executed.
The API of each command is documented in their respective handlers.
The API of each command is documented in their respective handler.
"""
def __init__(self, key, directory, allowed_directories, selected_file=None, exclude=None,
additional_watched_directories=None):
def __init__(self, key, directory, allowed_directories, selected_file=None, exclude=None):
"""
:param key: the key this instance should listen to
:param directory: working directory which the EventHandler should serve files from
:param allowed_directories: list of directories that can be switched to using the selectdir command
:param allowed_directories: list of directories that can be switched to using selectdir
:param selected_file: file that is selected by default
:param exclude: list of filenames that should not appear between files (for *.o, *.pyc, etc.)
:param additional_watched_directories: refresh the selected file when files change in these directories
(the working directory is watched by default, this is useful for
symlinks and such)
:param exclude: list of filenames that should not appear between files (for .o, .pyc, etc.)
"""
super().__init__(key)
try:
self.filemanager = FileManager(allowed_directories=allowed_directories, working_directory=directory,
selected_file=selected_file, exclude=exclude)
self.filemanager = FileManager(
allowed_directories=allowed_directories,
working_directory=directory,
selected_file=selected_file,
exclude=exclude
)
except IndexError:
raise EnvironmentError(f'No file(s) in IdeEventHandler working_directory "{directory}"!')
raise EnvironmentError(
f'No file(s) in IdeEventHandler working_directory "{directory}"!'
)
self.watched_directories = [self.filemanager.workdir]
if additional_watched_directories:
self.watched_directories.extend(additional_watched_directories)
MonitorManagerMixin.__init__(self, DirectoryMonitor, self.watched_directories)
MonitorManagerMixin.__init__(
self,
DirectoryMonitor,
self.filemanager.allowed_directories
)
self.commands = {'read': self.read,
self.commands = {
'read': self.read,
'write': self.write,
'select': self.select,
'selectdir': self.select_dir,
'exclude': self.exclude}
'exclude': self.exclude
}
def read(self, data):
"""
Read the currently selected file.
:return: message with the contents of the file in data['content']
:return dict: message with the contents of the file in data['content']
"""
try:
data['content'] = self.filemanager.file_contents
@ -155,8 +172,9 @@ class IdeEventHandler(EventHandlerBase, MonitorManagerMixin):
"""
Overwrites a file with the desired string.
:param data: TFW message data containing keys:
|-string: containing the desired file contents
:param data: TFW message data containing key 'content'
(new file content)
"""
self.monitor.ignore = self.monitor.ignore + 1
try:
@ -170,8 +188,8 @@ class IdeEventHandler(EventHandlerBase, MonitorManagerMixin):
"""
Selects a file from the current directory.
:param data: TFW message data containing keys:
|-filename: name of file to select relative to the current directory
:param data: TFW message data containing 'filename'
(name of file to select relative to the current directory)
"""
try:
self.filemanager.filename = data['filename']
@ -183,10 +201,10 @@ class IdeEventHandler(EventHandlerBase, MonitorManagerMixin):
"""
Select a new working directory to display files from.
:param data: TFW message data containing keys:
|-directory: absolute path of diretory to select.
:param data: TFW message data containing 'directory'
(absolute path of diretory to select.
must be a path whitelisted in
self.allowed_directories
self.allowed_directories)
"""
try:
self.filemanager.workdir = data['directory']
@ -204,8 +222,9 @@ class IdeEventHandler(EventHandlerBase, MonitorManagerMixin):
"""
Overwrite list of excluded files
:param data: TFW message data containing keys:
|-exclude: list of filename patterns to be excluded, e.g.: ["*.pyc", "*.o"]
:param data: TFW message data containing 'exclude'
(list of unix-style filename patterns to be excluded,
e.g.: ["\*.pyc", "\*.o")
"""
try:
self.filemanager.exclude = list(data['exclude'])

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@ -14,8 +14,10 @@ from tfw.mixins import ObserverMixin, SupervisorLogMixin
class LogMonitor(ObserverMixin):
def __init__(self, process_name, log_tail=0):
self.prevent_log_recursion()
ObserverMixin.__init__(self)
event_handler = SendLogWatchdogEventHandler(process_name, log_tail=log_tail)
event_handler = SendLogWatchdogEventHandler(
process_name,
log_tail=log_tail
)
self.observer.schedule(
event_handler,
event_handler.path
@ -29,10 +31,12 @@ class LogMonitor(ObserverMixin):
class SendLogWatchdogEventHandler(PatternMatchingWatchdogEventHandler, SupervisorLogMixin):
def __init__(self, process_name, log_tail=0):
self.acquire_own_supervisor_instance() # This thread-localises the xmlrpc client
self.process_name = process_name
self.procinfo = self.supervisor.getProcessInfo(self.process_name)
super().__init__([self.procinfo['stdout_logfile'], self.procinfo['stderr_logfile']])
super().__init__([
self.procinfo['stdout_logfile'],
self.procinfo['stderr_logfile']
])
self.uplink = ServerUplinkConnector()
self.log_tail = log_tail

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@ -1,7 +1,6 @@
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.
from tfw import EventHandlerBase
from tfw.mixins import MonitorManagerMixin
from tfw.config.logs import logging
@ -11,11 +10,25 @@ LOG = logging.getLogger(__name__)
class LogMonitoringEventHandler(EventHandlerBase, MonitorManagerMixin):
"""
Monitors the output of a supervisor process (stdout, stderr) and
sends the results to the frontend.
Accepts messages that have a data['command'] key specifying
a command to be executed.
The API of each command is documented in their respective handler.
"""
def __init__(self, key, process_name, log_tail=0):
super().__init__(key)
self.process_name = process_name
self.log_tail = log_tail
MonitorManagerMixin.__init__(self, LogMonitor, self.process_name, self.log_tail)
MonitorManagerMixin.__init__(
self,
LogMonitor,
self.process_name,
self.log_tail
)
self.command_handlers = {
'process_name': self.handle_process_name,
@ -31,7 +44,24 @@ class LogMonitoringEventHandler(EventHandlerBase, MonitorManagerMixin):
LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
def handle_process_name(self, data):
self.set_monitor_args(data['process_name'], self.log_tail)
"""
Changes the monitored process.
:param data: TFW message data containing 'value'
(name of the process to monitor)
"""
self.set_monitor_args(data['value'], self.log_tail)
def handle_log_tail(self, data):
self.set_monitor_args(self.process_name, data['log_tail'])
"""
Sets tail length of the log the monitor will send
to the frontend (the monitor will send back the last
'value' characters of the log).
:param data: TFW message data containing 'value'
(new tail length)
"""
self.set_monitor_args(self.process_name, data['value'])
def cleanup(self):
self.monitor.stop()

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@ -13,9 +13,11 @@ LOG = logging.getLogger(__name__)
class ProcessManager(SupervisorMixin, SupervisorLogMixin):
def __init__(self):
self.commands = {'start': self.start_process,
self.commands = {
'start': self.start_process,
'stop': self.stop_process,
'restart': self.restart_process}
'restart': self.restart_process
}
def __call__(self, command, process_name):
return self.commands[command](process_name)
@ -25,9 +27,9 @@ class ProcessManagingEventHandler(EventHandlerBase):
"""
Event handler that can manage processes managed by supervisor.
This EventHandler accepts messages that have a data["command"] key specifying
This EventHandler accepts messages that have a data['command'] key specifying
a command to be executed.
Every message must contain a data["process_name"] field with the name of the
Every message must contain a data['process_name'] field with the name of the
process to manage. This is the name specified in supervisor config files like so:
[program:someprogram]
@ -50,8 +52,14 @@ class ProcessManagingEventHandler(EventHandlerBase):
except SupervisorFault as fault:
message['data']['error'] = fault.faultString
finally:
message['data']['stdout'] = self.processmanager.read_stdout(data['process_name'], self.log_tail)
message['data']['stderr'] = self.processmanager.read_stderr(data['process_name'], self.log_tail)
message['data']['stdout'] = self.processmanager.read_stdout(
data['process_name'],
self.log_tail
)
message['data']['stderr'] = self.processmanager.read_stderr(
data['process_name'],
self.log_tail
)
return message
except KeyError:
LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)

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@ -14,15 +14,15 @@ LOG = logging.getLogger(__name__)
class TerminadoMiniServer:
def __init__(self, url, port, workdir, shellcmd):
self.port = port
self._term_manager = SingleTermManager(shell_command=shellcmd,
term_settings={'cwd': workdir})
self.application = Application(
[(
self._term_manager = SingleTermManager(
shell_command=shellcmd,
term_settings={'cwd': workdir}
)
self.application = Application([(
url,
TerminadoMiniServer.ResetterTermSocket,
{'term_manager': self._term_manager}
)]
)
)])
@property
def term_manager(self):
@ -46,5 +46,10 @@ class TerminadoMiniServer:
if __name__ == '__main__':
LOG.info('Terminado Mini Server listening on %s', TFWENV.TERMINADO_PORT)
TerminadoMiniServer('/terminal', TFWENV.TERMINADO_PORT, TFWENV.TERMINADO_WD, ['bash']).listen()
TerminadoMiniServer(
'/terminal',
TFWENV.TERMINADO_PORT,
TFWENV.TERMINADO_WD,
['bash']
).listen()
IOLoop.instance().start()

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@ -19,13 +19,13 @@ class TerminalCommands(ABC):
To receive events you need to subscribe TerminalCommand.callback to a HistoryMonitor
instance.
Inherit from this class and define methods which start with "command_". When the user
Inherit from this class and define methods which start with "command\_". When the user
executes the command specified after the underscore, your method will be invoked. All
such commands must expect the parameter *args which will contain the arguments of the
such commands must expect the parameter \*args which will contain the arguments of the
command.
For example to define a method that runs when someone starts vim in the terminal
you have to define a method like: "def command_vim(self, *args)"
you have to define a method like: "def command_vim(self, \*args)"
You can also use this class to create new commands similarly.
"""
@ -36,8 +36,12 @@ class TerminalCommands(ABC):
self._setup_bashrc_aliases(bashrc)
def _build_command_to_implementation_dict(self):
return {self._parse_command_name(fun): getattr(self, fun) for fun in dir(self)
if callable(getattr(self, fun)) and self._is_command_implementation(fun)}
return {
self._parse_command_name(fun): getattr(self, fun)
for fun in dir(self)
if callable(getattr(self, fun))
and self._is_command_implementation(fun)
}
def _setup_bashrc_aliases(self, bashrc):
with open(bashrc, 'a') as ofile:

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@ -16,9 +16,9 @@ class TerminalEventHandler(EventHandlerBase):
sessions to connect to. You need to instanciate this in order for frontend
terminals to work.
This EventHandler accepts messages that have a data["command"] key specifying
This EventHandler accepts messages that have a data['command'] key specifying
a command to be executed.
The API of each command is documented in their respective handlers.
The API of each command is documented in their respective handler.
"""
def __init__(self, key, monitor):
"""
@ -29,9 +29,19 @@ class TerminalEventHandler(EventHandlerBase):
self.working_directory = TFWENV.TERMINADO_DIR
self._historymonitor = monitor
bash_as_user_cmd = ['sudo', '-u', TAOENV.USER, 'bash']
self.terminado_server = TerminadoMiniServer('/terminal', TFWENV.TERMINADO_PORT, TFWENV.TERMINADO_WD, bash_as_user_cmd)
self.commands = {'write': self.write,
'read': self.read}
self.terminado_server = TerminadoMiniServer(
'/terminal',
TFWENV.TERMINADO_PORT,
TFWENV.TERMINADO_WD,
bash_as_user_cmd
)
self.commands = {
'write': self.write,
'read': self.read
}
if self._historymonitor:
self._historymonitor.watch()
self.terminado_server.listen()
@ -54,18 +64,18 @@ class TerminalEventHandler(EventHandlerBase):
Writes a string to the terminal session (on the pty level).
Useful for pre-typing and executing commands for the user.
:param data: TFW message data containing keys:
|-shellcmd: command to be written to the pty
:param data: TFW message data containing 'value'
(command to be written to the pty)
"""
self.terminado_server.pty.write(data['shellcmd'])
self.terminado_server.pty.write(data['value'])
def read(self, data):
"""
Reads the history of commands executed.
:param data: TFW message data containing keys:
|-count: the number of history elements to return
:return: message with list of commands in data['history']
:param data: TFW message data containing 'count'
(the number of history elements to return)
:return dict: message with list of commands in data['history']
"""
data['count'] = int(data.get('count', 1))
if self.historymonitor:

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@ -1,6 +1,6 @@
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.
from envvars import prefixed_envvars_to_namedtuple
from envvars import LazyEnvironment
TFWENV = prefixed_envvars_to_namedtuple('TFW_', 'tfwenvtuple')
TFWENV = LazyEnvironment('TFW_', 'tfwenvtuple').environment

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@ -2,3 +2,4 @@
# All Rights Reserved. See LICENSE file for details.
from .rate_limiter import RateLimiter
from .lazy_property import lazy_property

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@ -0,0 +1,19 @@
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.
class lazy_property:
"""
Decorator that replaces a function with the value
it calculates on the first call.
"""
def __init__(self, func):
self.func = func
self.__doc__ = func.__doc__
def __get__(self, instance, owner):
if instance is None:
return self # avoids potential __new__ TypeError
value = self.func(instance)
setattr(instance, self.func.__name__, value)
return value

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@ -19,15 +19,16 @@ class FSMBase(CallbackMixin):
states, transitions = [], []
def __init__(self, initial: str = None, accepted_states: List[str] = None):
CallbackMixin.__init__(self)
self.accepted_states = accepted_states or [self.states[-1]]
self.machine = Machine(model=self,
self.machine = Machine(
model=self,
states=self.states,
transitions=self.transitions,
initial=initial or self.states[0],
send_event=True,
ignore_invalid_triggers=True,
after_state_change='execute_callbacks')
after_state_change='execute_callbacks'
)
def execute_callbacks(self, event_data):
self._execute_callbacks(event_data.kwargs)

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@ -11,12 +11,19 @@ class LinearFSM(FSMBase):
a number of steps specified in the constructor. It automatically sets up 2
actions (triggers) between states as such:
(0) -- step_1 --> (1) -- step_2 --> (2) -- step_3 --> (3) ... and so on
\-step_next-/ \-step_next-/ \-step_next-/
"""
def __init__(self, number_of_steps):
self.states = list(map(str, range(number_of_steps)))
self.transitions = []
for index in self.states[:-1]:
self.transitions.append({'trigger': f'step_{int(index)+1}', 'source': index, 'dest': str(int(index)+1)})
self.transitions.append({'trigger': 'step_next', 'source': index, 'dest': str(int(index)+1)})
self.transitions.append({
'trigger': f'step_{int(index)+1}',
'source': index,
'dest': str(int(index)+1)
})
self.transitions.append({
'trigger': 'step_next',
'source': index,
'dest': str(int(index)+1)
})
super(LinearFSM, self).__init__()

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@ -3,17 +3,20 @@
from functools import partial
from tfw.decorators import lazy_property
class CallbackMixin:
def __init__(self):
self._callbacks = []
@lazy_property
def _callbacks(self):
return []
def subscribe_callback(self, callback, *args, **kwargs):
"""
Subscribe a callable to invoke once an event is triggered.
:param callback: callable to be executed on events
:param *args: arguments passed to callable
:param **kwargs: kwargs passed to callable
:param args: arguments passed to callable
:param kwargs: kwargs passed to callable
"""
fun = partial(callback, *args, **kwargs)
self._callbacks.append(fun)

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@ -3,10 +3,13 @@
from watchdog.observers import Observer
from tfw.decorators import lazy_property
class ObserverMixin:
def __init__(self):
self.observer = Observer()
@lazy_property
def observer(self):
return Observer()
def watch(self):
self.observer.start()

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@ -6,21 +6,14 @@ from xmlrpc.client import Fault as SupervisorFault
from contextlib import suppress
from os import remove
from tfw.decorators import lazy_property
from tfw.config import TFWENV
def get_supervisor_instance():
return xmlrpc.client.ServerProxy(TFWENV.SUPERVISOR_HTTP_URI).supervisor
class SupervisorBaseMixin:
supervisor = get_supervisor_instance()
def acquire_own_supervisor_instance(self):
"""
Give this instance non-static, local xmlrpc client
"""
self.supervisor = get_supervisor_instance()
@lazy_property
def supervisor(self):
return xmlrpc.client.ServerProxy(TFWENV.SUPERVISOR_HTTP_URI).supervisor
class SupervisorMixin(SupervisorBaseMixin):

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@ -26,5 +26,7 @@ class MessageSender:
'timestamp': datetime.now().isoformat(),
'message': message
}
self.server_connector.send({'key': self.key,
'data': data})
self.server_connector.send({
'key': self.key,
'data': data
})

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@ -43,11 +43,17 @@ def deserialize_tfw_msg(*args):
def _serialize_all(*args):
return tuple(_serialize_single(arg) for arg in args)
return tuple(
_serialize_single(arg)
for arg in args
)
def _deserialize_all(*args):
return tuple(_deserialize_single(arg) for arg in args)
return tuple(
_deserialize_single(arg)
for arg in args
)
def _serialize_single(data):

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@ -30,13 +30,16 @@ class TFWServer:
self._fsm.subscribe_callback(self._fsm_updater.update)
self._event_handler_connector = EventHandlerConnector()
self.application = Application(
[(r'/ws', ZMQWebSocketProxy, {'make_eventhandler_message': self.make_eventhandler_message,
self.application = Application([(
r'/ws', ZMQWebSocketProxy,{
'make_eventhandler_message': self.make_eventhandler_message,
'proxy_filter': self.proxy_filter,
'handle_trigger': self.handle_trigger,
'event_handler_connector': self._event_handler_connector})]
'event_handler_connector': self._event_handler_connector
})]
)
#self.controller_responder = ControllerResponder(self.fsm) TODO: add this once controller stuff is resolved
# self.controller_responder = ControllerResponder(self.fsm)
# TODO: add this once controller stuff is resolved
@property
def fsm(self):
@ -97,8 +100,11 @@ class FSMManager:
self.trigger_predicates[trigger].extend(predicates)
def unsubscribe_predicate(self, trigger, *predicates):
self.trigger_predicates[trigger] = [predicate for predicate in self.trigger_predicates[trigger]
not in predicates]
self.trigger_predicates[trigger] = [
predicate
for predicate in self.trigger_predicates[trigger]
not in predicates
]
class FSMUpdater:
@ -111,10 +117,18 @@ class FSMUpdater:
self.uplink.send(self.generate_fsm_update())
def generate_fsm_update(self):
return {'key': 'FSMUpdate',
'data': self.get_fsm_state_and_transitions()}
return {
'key': 'FSMUpdate',
'data': self.get_fsm_state_and_transitions()
}
def get_fsm_state_and_transitions(self):
state = self.fsm.state
valid_transitions = [{'trigger': trigger} for trigger in self.fsm.machine.get_triggers(self.fsm.state)]
return {'current_state': state, 'valid_transitions': valid_transitions}
valid_transitions = [
{'trigger': trigger}
for trigger in self.fsm.machine.get_triggers(self.fsm.state)
]
return {
'current_state': state,
'valid_transitions': valid_transitions
}