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def package_for_editor_signavio(self, spec, filename):
"""
Adds the SVG files to the archive for this BPMN file.
"""
signavio_file = filename[:-len('.bpmn20.xml')] + '.signavio.xml'
if os.path.exists(signavio_file):
self.write_file_to_package_zip(
"src/" + self._get_zip_path(signavio_file), signavio_file)
f = open(signavio_file, 'r')
try:
signavio_tree = ET.parse(f)
finally:
f.close()
svg_node = one(signavio_tree.findall('.//svg-representation'))
self.write_to_package_zip("%s.svg" % spec.name, svg_node.text) |
def write_meta_data(self):
"""
Writes the metadata.ini file to the archive.
"""
config = configparser.ConfigParser()
config.add_section('MetaData')
config.set('MetaData', 'entry_point_process', self.wf_spec.name)
if self.editor:
config.set('MetaData', 'editor', self.editor)
for k, v in self.meta_data:
config.set('MetaData', k, v)
if not self.PARSER_CLASS == BpmnParser:
config.set('MetaData', 'parser_class_module',
inspect.getmodule(self.PARSER_CLASS).__name__)
config.set('MetaData', 'parser_class', self.PARSER_CLASS.__name__)
ini = StringIO()
config.write(ini)
self.write_to_package_zip(self.METADATA_FILE, ini.getvalue()) |
def add_main_options(cls, parser):
"""
Override in subclass if required.
"""
parser.add_option("-o", "--output", dest="package_file",
help="create the BPMN package in the specified file")
parser.add_option("-p", "--process", dest="entry_point_process",
help="specify the entry point process")
parser.add_option("-c", "--config-file", dest="config_file",
help="specify a config file to use")
parser.add_option(
"-i", "--initialise-config-file", action="store_true",
dest="init_config_file", default=False,
help="create a new config file from the specified options")
group = OptionGroup(parser, "BPMN Editor Options",
"These options are not required, but may be "
" provided to activate special features of "
"supported BPMN editors.")
group.add_option("--editor", dest="editor",
help="editors with special support: signavio")
parser.add_option_group(group) |
def add_additional_options(cls, parser):
"""
Override in subclass if required.
"""
group = OptionGroup(parser, "Target Engine Options",
"These options are not required, but may be "
"provided if a specific "
"BPMN application engine is targeted.")
group.add_option("-e", "--target-engine", dest="target_engine",
help="target the specified BPMN application engine")
group.add_option(
"-t", "--target-version", dest="target_engine_version",
help="target the specified version of the BPMN application engine")
parser.add_option_group(group) |
def check_args(cls, config, options, args, parser, package_file=None):
"""
Override in subclass if required.
"""
if not args:
parser.error("no input files specified")
if not (package_file or options.package_file):
parser.error("no package file specified")
if not options.entry_point_process:
parser.error("no entry point process specified") |
def merge_options_and_config(cls, config, options, args):
"""
Override in subclass if required.
"""
if args:
config.set(CONFIG_SECTION_NAME, 'input_files', ','.join(args))
elif config.has_option(CONFIG_SECTION_NAME, 'input_files'):
for i in config.get(CONFIG_SECTION_NAME, 'input_files').split(','):
if not os.path.isabs(i):
i = os.path.abspath(
os.path.join(os.path.dirname(options.config_file), i))
args.append(i)
cls.merge_option_and_config_str('package_file', config, options)
cls.merge_option_and_config_str('entry_point_process', config, options)
cls.merge_option_and_config_str('target_engine', config, options)
cls.merge_option_and_config_str(
'target_engine_version', config, options)
cls.merge_option_and_config_str('editor', config, options) |
def merge_option_and_config_str(cls, option_name, config, options):
"""
Utility method to merge an option and config, with the option taking "
precedence
"""
opt = getattr(options, option_name, None)
if opt:
config.set(CONFIG_SECTION_NAME, option_name, opt)
elif config.has_option(CONFIG_SECTION_NAME, option_name):
setattr(options, option_name, config.get(
CONFIG_SECTION_NAME, option_name)) |
def create_meta_data(cls, options, args, parser):
"""
Override in subclass if required.
"""
meta_data = []
meta_data.append(('spiff_version', cls.get_version()))
if options.target_engine:
meta_data.append(('target_engine', options.target_engine))
if options.target_engine:
meta_data.append(
('target_engine_version', options.target_engine_version))
return meta_data |
def parse_node(self, node):
"""
Parses the specified child task node, and returns the task spec. This
can be called by a TaskParser instance, that is owned by this
ProcessParser.
"""
if node.get('id') in self.parsed_nodes:
return self.parsed_nodes[node.get('id')]
(node_parser, spec_class) = self.parser._get_parser_class(node.tag)
if not node_parser or not spec_class:
raise ValidationException(
"There is no support implemented for this task type.",
node=node, filename=self.filename)
np = node_parser(self, spec_class, node)
task_spec = np.parse_node()
return task_spec |
def get_spec(self):
"""
Parse this process (if it has not already been parsed), and return the
workflow spec.
"""
if self.is_parsed:
return self.spec
if self.parsing_started:
raise NotImplementedError(
'Recursive call Activities are not supported.')
self._parse()
return self.get_spec() |
def _on_trigger(self, task_spec):
"""
May be called after execute() was already completed to create an
additional outbound task.
"""
# Find a Task for this TaskSpec.
my_task = self._find_my_task(task_spec)
if my_task._has_state(Task.COMPLETED):
state = Task.READY
else:
state = Task.FUTURE
for output in self.outputs:
new_task = my_task._add_child(output, state)
new_task.triggered = True
output._predict(new_task) |
def connect(self, task_spec):
"""
Connect the *following* task to this one. In other words, the
given task is added as an output task.
task -- the task to connect to.
"""
self.thread_starter.outputs.append(task_spec)
task_spec._connect_notify(self.thread_starter) |
def _get_activated_tasks(self, my_task, destination):
"""
Returns the list of tasks that were activated in the previous
call of execute(). Only returns tasks that point towards the
destination task, i.e. those which have destination as a
descendant.
my_task -- the task of this TaskSpec
destination -- the child task
"""
task = destination._find_ancestor(self.thread_starter)
return self.thread_starter._get_activated_tasks(task, destination) |
def _on_trigger(self, my_task):
"""
May be called after execute() was already completed to create an
additional outbound task.
"""
for output in self.outputs:
new_task = my_task.add_child(output, Task.READY)
new_task.triggered = True |
def deserialize_assign(self, workflow, start_node):
"""
Reads the "pre-assign" or "post-assign" tag from the given node.
start_node -- the xml node (xml.dom.minidom.Node)
"""
name = start_node.getAttribute('name')
attrib = start_node.getAttribute('field')
value = start_node.getAttribute('value')
kwargs = {}
if name == '':
_exc('name attribute required')
if attrib != '' and value != '':
_exc('Both, field and right-value attributes found')
elif attrib == '' and value == '':
_exc('field or value attribute required')
elif value != '':
kwargs['right'] = value
else:
kwargs['right_attribute'] = attrib
return operators.Assign(name, **kwargs) |
def deserialize_data(self, workflow, start_node):
"""
Reads a "data" or "define" tag from the given node.
start_node -- the xml node (xml.dom.minidom.Node)
"""
name = start_node.getAttribute('name')
value = start_node.getAttribute('value')
return name, value |
def deserialize_assign_list(self, workflow, start_node):
"""
Reads a list of assignments from the given node.
workflow -- the workflow
start_node -- the xml structure (xml.dom.minidom.Node)
"""
# Collect all information.
assignments = []
for node in start_node.childNodes:
if node.nodeType != minidom.Node.ELEMENT_NODE:
continue
if node.nodeName.lower() == 'assign':
assignments.append(self.deserialize_assign(workflow, node))
else:
_exc('Unknown node: %s' % node.nodeName)
return assignments |
def deserialize_logical(self, node):
"""
Reads the logical tag from the given node, returns a Condition object.
node -- the xml node (xml.dom.minidom.Node)
"""
term1_attrib = node.getAttribute('left-field')
term1_value = node.getAttribute('left-value')
op = node.nodeName.lower()
term2_attrib = node.getAttribute('right-field')
term2_value = node.getAttribute('right-value')
if op not in _op_map:
_exc('Invalid operator')
if term1_attrib != '' and term1_value != '':
_exc('Both, left-field and left-value attributes found')
elif term1_attrib == '' and term1_value == '':
_exc('left-field or left-value attribute required')
elif term1_value != '':
left = term1_value
else:
left = operators.Attrib(term1_attrib)
if term2_attrib != '' and term2_value != '':
_exc('Both, right-field and right-value attributes found')
elif term2_attrib == '' and term2_value == '':
_exc('right-field or right-value attribute required')
elif term2_value != '':
right = term2_value
else:
right = operators.Attrib(term2_attrib)
return _op_map[op](left, right) |
def deserialize_condition(self, workflow, start_node):
"""
Reads the conditional statement from the given node.
workflow -- the workflow with which the concurrence is associated
start_node -- the xml structure (xml.dom.minidom.Node)
"""
# Collect all information.
condition = None
spec_name = None
for node in start_node.childNodes:
if node.nodeType != minidom.Node.ELEMENT_NODE:
continue
if node.nodeName.lower() == 'successor':
if spec_name is not None:
_exc('Duplicate task name %s' % spec_name)
if node.firstChild is None:
_exc('Successor tag without a task name')
spec_name = node.firstChild.nodeValue
elif node.nodeName.lower() in _op_map:
if condition is not None:
_exc('Multiple conditions are not yet supported')
condition = self.deserialize_logical(node)
else:
_exc('Unknown node: %s' % node.nodeName)
if condition is None:
_exc('Missing condition in conditional statement')
if spec_name is None:
_exc('A %s has no task specified' % start_node.nodeName)
return condition, spec_name |
def deserialize_task_spec(self, workflow, start_node, read_specs):
"""
Reads the task from the given node and returns a tuple
(start, end) that contains the stream of objects that model
the behavior.
workflow -- the workflow with which the task is associated
start_node -- the xml structure (xml.dom.minidom.Node)
"""
# Extract attributes from the node.
nodetype = start_node.nodeName.lower()
name = start_node.getAttribute('name').lower()
context = start_node.getAttribute('context').lower()
mutex = start_node.getAttribute('mutex').lower()
cancel = start_node.getAttribute('cancel').lower()
success = start_node.getAttribute('success').lower()
times = start_node.getAttribute('times').lower()
times_field = start_node.getAttribute('times-field').lower()
threshold = start_node.getAttribute('threshold').lower()
threshold_field = start_node.getAttribute('threshold-field').lower()
file = start_node.getAttribute('file').lower()
file_field = start_node.getAttribute('file-field').lower()
kwargs = {'lock': [],
'data': {},
'defines': {},
'pre_assign': [],
'post_assign': []}
if nodetype not in _spec_map:
_exc('Invalid task type "%s"' % nodetype)
if nodetype == 'start-task':
name = 'start'
if name == '':
_exc('Invalid task name "%s"' % name)
if name in read_specs:
_exc('Duplicate task name "%s"' % name)
if cancel != '' and cancel != '0':
kwargs['cancel'] = True
if success != '' and success != '0':
kwargs['success'] = True
if times != '':
kwargs['times'] = int(times)
if times_field != '':
kwargs['times'] = operators.Attrib(times_field)
if threshold != '':
kwargs['threshold'] = int(threshold)
if threshold_field != '':
kwargs['threshold'] = operators.Attrib(threshold_field)
if file != '':
kwargs['file'] = file
if file_field != '':
kwargs['file'] = operators.Attrib(file_field)
if nodetype == 'choose':
kwargs['choice'] = []
if nodetype == 'trigger':
context = [context]
if mutex != '':
context = mutex
# Walk through the children of the node.
successors = []
for node in start_node.childNodes:
if node.nodeType != minidom.Node.ELEMENT_NODE:
continue
if node.nodeName == 'description':
kwargs['description'] = node.firstChild.nodeValue
elif node.nodeName == 'successor' \
or node.nodeName == 'default-successor':
if node.firstChild is None:
_exc('Empty %s tag' % node.nodeName)
successors.append((None, node.firstChild.nodeValue))
elif node.nodeName == 'conditional-successor':
successors.append(self.deserialize_condition(workflow, node))
elif node.nodeName == 'define':
key, value = self.deserialize_data(workflow, node)
kwargs['defines'][key] = value
# "property" tag exists for backward compatibility.
elif node.nodeName == 'data' or node.nodeName == 'property':
key, value = self.deserialize_data(workflow, node)
kwargs['data'][key] = value
elif node.nodeName == 'pre-assign':
kwargs['pre_assign'].append(
self.deserialize_assign(workflow, node))
elif node.nodeName == 'post-assign':
kwargs['post_assign'].append(
self.deserialize_assign(workflow, node))
elif node.nodeName == 'in':
kwargs['in_assign'] = self.deserialize_assign_list(
workflow, node)
elif node.nodeName == 'out':
kwargs['out_assign'] = self.deserialize_assign_list(
workflow, node)
elif node.nodeName == 'cancel':
if node.firstChild is None:
_exc('Empty %s tag' % node.nodeName)
if context == '':
context = []
elif not isinstance(context, list):
context = [context]
context.append(node.firstChild.nodeValue)
elif node.nodeName == 'lock':
if node.firstChild is None:
_exc('Empty %s tag' % node.nodeName)
kwargs['lock'].append(node.firstChild.nodeValue)
elif node.nodeName == 'pick':
if node.firstChild is None:
_exc('Empty %s tag' % node.nodeName)
kwargs['choice'].append(node.firstChild.nodeValue)
else:
_exc('Unknown node: %s' % node.nodeName)
# Create a new instance of the task spec.
module = _spec_map[nodetype]
if nodetype == 'start-task':
spec = module(workflow, **kwargs)
elif nodetype == 'multi-instance' or nodetype == 'thread-split':
if times == '' and times_field == '':
_exc('Missing "times" or "times-field" in "%s"' % name)
elif times != '' and times_field != '':
_exc('Both, "times" and "times-field" in "%s"' % name)
spec = module(workflow, name, **kwargs)
elif context == '':
spec = module(workflow, name, **kwargs)
else:
spec = module(workflow, name, context, **kwargs)
read_specs[name] = spec, successors |
def deserialize_workflow_spec(self, s_state, filename=None):
"""
Reads the workflow from the given XML structure and returns a
WorkflowSpec instance.
"""
dom = minidom.parseString(s_state)
node = dom.getElementsByTagName('process-definition')[0]
name = node.getAttribute('name')
if name == '':
_exc('%s without a name attribute' % node.nodeName)
# Read all task specs and create a list of successors.
workflow_spec = specs.WorkflowSpec(name, filename)
del workflow_spec.task_specs['Start']
end = specs.Simple(workflow_spec, 'End'), []
read_specs = dict(end=end)
for child_node in node.childNodes:
if child_node.nodeType != minidom.Node.ELEMENT_NODE:
continue
if child_node.nodeName == 'name':
workflow_spec.name = child_node.firstChild.nodeValue
elif child_node.nodeName == 'description':
workflow_spec.description = child_node.firstChild.nodeValue
elif child_node.nodeName.lower() in _spec_map:
self.deserialize_task_spec(
workflow_spec, child_node, read_specs)
else:
_exc('Unknown node: %s' % child_node.nodeName)
# Remove the default start-task from the workflow.
workflow_spec.start = read_specs['start'][0]
# Connect all task specs.
for name in read_specs:
spec, successors = read_specs[name]
for condition, successor_name in successors:
if successor_name not in read_specs:
_exc('Unknown successor: "%s"' % successor_name)
successor, foo = read_specs[successor_name]
if condition is None:
spec.connect(successor)
else:
spec.connect_if(condition, successor)
return workflow_spec |
def has_fired(self, my_task):
"""
The Timer is considered to have fired if the evaluated dateTime
expression is before datetime.datetime.now()
"""
dt = my_task.workflow.script_engine.evaluate(my_task, self.dateTime)
if dt is None:
return False
if dt.tzinfo:
tz = dt.tzinfo
now = tz.fromutc(datetime.datetime.utcnow().replace(tzinfo=tz))
else:
now = datetime.datetime.now()
return now > dt |
def _add_notify(self, task_spec):
"""
Called by a task spec when it was added into the workflow.
"""
if task_spec.name in self.task_specs:
raise KeyError('Duplicate task spec name: ' + task_spec.name)
self.task_specs[task_spec.name] = task_spec
task_spec.id = len(self.task_specs) |
def validate(self):
"""Checks integrity of workflow and reports any problems with it.
Detects:
- loops (tasks that wait on each other in a loop)
:returns: empty list if valid, a list of errors if not
"""
results = []
from ..specs import Join
def recursive_find_loop(task, history):
current = history[:]
current.append(task)
if isinstance(task, Join):
if task in history:
msg = "Found loop with '%s': %s then '%s' again" % (
task.name, '->'.join([p.name for p in history]),
task.name)
raise Exception(msg)
for predecessor in task.inputs:
recursive_find_loop(predecessor, current)
for parent in task.inputs:
recursive_find_loop(parent, current)
for task_id, task in list(self.task_specs.items()):
# Check for cyclic waits
try:
recursive_find_loop(task, [])
except Exception as exc:
results.append(exc.__str__())
# Check for disconnected tasks
if not task.inputs and task.name not in ['Start', 'Root']:
if task.outputs:
results.append("Task '%s' is disconnected (no inputs)" %
task.name)
else:
LOG.debug("Task '%s' is not being used" % task.name)
return results |
def accept_message(self, message):
"""
Indicate to the workflow that a message has been received. The message
will be processed by any waiting Intermediate or Boundary Message
Events, that are waiting for the message.
"""
assert not self.read_only
self.refresh_waiting_tasks()
self.do_engine_steps()
for my_task in Task.Iterator(self.task_tree, Task.WAITING):
my_task.task_spec.accept_message(my_task, message) |
def do_engine_steps(self):
"""
Execute any READY tasks that are engine specific (for example, gateways
or script tasks). This is done in a loop, so it will keep completing
those tasks until there are only READY User tasks, or WAITING tasks
left.
"""
assert not self.read_only
engine_steps = list(
[t for t in self.get_tasks(Task.READY)
if self._is_engine_task(t.task_spec)])
while engine_steps:
for task in engine_steps:
task.complete()
engine_steps = list(
[t for t in self.get_tasks(Task.READY)
if self._is_engine_task(t.task_spec)]) |
def refresh_waiting_tasks(self):
"""
Refresh the state of all WAITING tasks. This will, for example, update
Catching Timer Events whose waiting time has passed.
"""
assert not self.read_only
for my_task in self.get_tasks(Task.WAITING):
my_task.task_spec._update(my_task) |
def get_ready_user_tasks(self):
"""
Returns a list of User Tasks that are READY for user action
"""
return [t for t in self.get_tasks(Task.READY)
if not self._is_engine_task(t.task_spec)] |
def _on_trigger(self, my_task):
"""
Enqueue a trigger, such that this tasks triggers multiple times later
when _on_complete() is called.
"""
self.queued += 1
# All tasks that have already completed need to be put back to
# READY.
for thetask in my_task.workflow.task_tree:
if thetask.thread_id != my_task.thread_id:
continue
if (thetask.task_spec == self and
thetask._has_state(Task.COMPLETED)):
thetask._set_state(Task.FUTURE, True)
thetask._ready() |
def _on_complete_hook(self, my_task):
"""
A hook into _on_complete() that does the task specific work.
:type my_task: Task
:param my_task: A task in which this method is executed.
:rtype: bool
:returns: True on success, False otherwise.
"""
times = int(valueof(my_task, self.times, 1)) + self.queued
for i in range(times):
for task_name in self.context:
task = my_task.workflow.get_task_spec_from_name(task_name)
task._on_trigger(my_task)
self.queued = 0
TaskSpec._on_complete_hook(self, my_task) |
def deserialize(cls, serializer, wf_spec, s_state, **kwargs):
"""
Deserializes the trigger using the provided serializer.
"""
return serializer.deserialize_trigger(wf_spec,
s_state,
**kwargs) |
def evaluate(self, task, expression):
"""
Evaluate the given expression, within the context of the given task and
return the result.
"""
if isinstance(expression, Operator):
return expression._matches(task)
else:
return self._eval(task, expression, **task.data) |
def execute(self, task, script, **kwargs):
"""
Execute the script, within the context of the specified task
"""
locals().update(kwargs)
exec(script) |
def merge_dictionary(dst, src):
"""Recursive merge two dicts (vs .update which overwrites the hashes at the
root level)
Note: This updates dst.
Copied from checkmate.utils
"""
stack = [(dst, src)]
while stack:
current_dst, current_src = stack.pop()
for key in current_src:
source = current_src[key]
if key not in current_dst:
current_dst[key] = source
else:
dest = current_dst[key]
if isinstance(source, dict) and isinstance(dest, dict):
stack.append((dest, source))
elif isinstance(source, list) and isinstance(dest, list):
# Make them the same size
r = dest[:]
s = source[:]
if len(dest) > len(source):
s.append([None for i in range(len(dest) -
len(source))])
elif len(dest) < len(source):
r.append([None for i in range(len(source) -
len(dest))])
# Merge lists
for index, value in enumerate(r):
if (not value) and s[index]:
r[index] = s[index]
elif isinstance(value, dict) and \
isinstance(s[index], dict):
stack.append((dest[index], source[index]))
else:
dest[index] = s[index]
current_dst[key] = r
else:
current_dst[key] = source
return dst |
def _start(self, my_task, force=False):
"""
Checks whether the preconditions for going to READY state are met.
Returns True if the threshold was reached, False otherwise.
Also returns the list of tasks that yet need to be completed.
"""
# If the threshold was already reached, there is nothing else to do.
if my_task._has_state(Task.COMPLETED):
return True, None
if my_task._has_state(Task.READY):
return True, None
# Check whether we may fire.
if self.split_task is None:
return self._check_threshold_unstructured(my_task, force)
return self._check_threshold_structured(my_task, force) |
def _on_trigger(self, my_task):
"""
May be called to fire the Join before the incoming branches are
completed.
"""
for task in my_task.workflow.task_tree._find_any(self):
if task.thread_id != my_task.thread_id:
continue
self._do_join(task) |
def connect(self, task_spec):
"""
Connects the task spec that is executed if no other condition
matches.
:type task_spec: TaskSpec
:param task_spec: The following task spec.
"""
assert self.default_task_spec is None
self.outputs.append(task_spec)
self.default_task_spec = task_spec.name
task_spec._connect_notify(self) |
def container_id(self, name):
'''Try to find the container ID with the specified name'''
container = self._containers.get(name, None)
if not container is None:
return container.get('id', None)
return None |
def initialize(self, containers):
'''
Initialize a new state file with the given contents.
This function fails in case the state file already exists.
'''
self._containers = deepcopy(containers)
self.__write(containers, initialize=True) |
def update(self, containers):
'''Update the current state file with the specified contents'''
self._containers = deepcopy(containers)
self.__write(containers, initialize=False) |
def load(self):
'''Try to load a blockade state file in the current directory'''
try:
with open(self._state_file) as f:
state = yaml.safe_load(f)
self._containers = state['containers']
except (IOError, OSError) as err:
if err.errno == errno.ENOENT:
raise NotInitializedError("No blockade exists in this context")
raise InconsistentStateError("Failed to load Blockade state: "
+ str(err))
except Exception as err:
raise InconsistentStateError("Failed to load Blockade state: "
+ str(err)) |
def _get_blockade_id_from_cwd(self, cwd=None):
'''Generate a new blockade ID based on the CWD'''
if not cwd:
cwd = os.getcwd()
# this follows a similar pattern as docker-compose uses
parent_dir = os.path.abspath(cwd)
basename = os.path.basename(parent_dir).lower()
blockade_id = re.sub(r"[^a-z0-9]", "", basename)
if not blockade_id: # if we can't get a valid name from CWD, use "default"
blockade_id = "default"
return blockade_id |
def _assure_dir(self):
'''Make sure the state directory exists'''
try:
os.makedirs(self._state_dir)
except OSError as err:
if err.errno != errno.EEXIST:
raise |
def _state_delete(self):
'''Try to delete the state.yml file and the folder .blockade'''
try:
os.remove(self._state_file)
except OSError as err:
if err.errno not in (errno.EPERM, errno.ENOENT):
raise
try:
os.rmdir(self._state_dir)
except OSError as err:
if err.errno not in (errno.ENOTEMPTY, errno.ENOENT):
raise |
def __base_state(self, containers):
'''
Convert blockade ID and container information into
a state dictionary object.
'''
return dict(blockade_id=self._blockade_id,
containers=containers,
version=self._state_version) |
def __write(self, containers, initialize=True):
'''Write the given state information into a file'''
path = self._state_file
self._assure_dir()
try:
flags = os.O_WRONLY | os.O_CREAT
if initialize:
flags |= os.O_EXCL
with os.fdopen(os.open(path, flags), "w") as f:
yaml.safe_dump(self.__base_state(containers), f)
except OSError as err:
if err.errno == errno.EEXIST:
raise AlreadyInitializedError(
"Path %s exists. "
"You may need to destroy a previous blockade." % path)
raise
except Exception:
# clean up our created file
self._state_delete()
raise |
def expand_partitions(containers, partitions):
'''
Validate the partitions of containers. If there are any containers
not in any partition, place them in an new partition.
'''
# filter out holy containers that don't belong
# to any partition at all
all_names = frozenset(c.name for c in containers if not c.holy)
holy_names = frozenset(c.name for c in containers if c.holy)
neutral_names = frozenset(c.name for c in containers if c.neutral)
partitions = [frozenset(p) for p in partitions]
unknown = set()
holy = set()
union = set()
for partition in partitions:
unknown.update(partition - all_names - holy_names)
holy.update(partition - all_names)
union.update(partition)
if unknown:
raise BlockadeError('Partitions contain unknown containers: %s' %
list(unknown))
if holy:
raise BlockadeError('Partitions contain holy containers: %s' %
list(holy))
# put any leftover containers in an implicit partition
leftover = all_names.difference(union)
if leftover:
partitions.append(leftover)
# we create an 'implicit' partition for the neutral containers
# in case they are not part of the leftover anyways
if not neutral_names.issubset(leftover):
partitions.append(neutral_names)
return partitions |
def get_source_chains(self, blockade_id):
"""Get a map of blockade chains IDs -> list of IPs targeted at them
For figuring out which container is in which partition
"""
result = {}
if not blockade_id:
raise ValueError("invalid blockade_id")
lines = self.get_chain_rules("FORWARD")
for line in lines:
parts = line.split()
if len(parts) < 4:
continue
try:
partition_index = parse_partition_index(blockade_id, parts[0])
except ValueError:
continue # not a rule targetting a blockade chain
source = parts[3]
if source:
result[source] = partition_index
return result |
def insert_rule(self, chain, src=None, dest=None, target=None):
"""Insert a new rule in the chain
"""
if not chain:
raise ValueError("Invalid chain")
if not target:
raise ValueError("Invalid target")
if not (src or dest):
raise ValueError("Need src, dest, or both")
args = ["-I", chain]
if src:
args += ["-s", src]
if dest:
args += ["-d", dest]
args += ["-j", target]
self.call(*args) |
def _sm_start(self, *args, **kwargs):
"""
Start the timer waiting for pain
"""
millisec = random.randint(self._start_min_delay, self._start_max_delay)
self._timer = threading.Timer(millisec / 1000.0, self.event_timeout)
self._timer.start() |
def _sm_to_pain(self, *args, **kwargs):
"""
Start the blockade event
"""
_logger.info("Starting chaos for blockade %s" % self._blockade_name)
self._do_blockade_event()
# start the timer to end the pain
millisec = random.randint(self._run_min_time, self._run_max_time)
self._timer = threading.Timer(millisec / 1000.0, self.event_timeout)
self._timer.start() |
def _sm_stop_from_no_pain(self, *args, **kwargs):
"""
Stop chaos when there is no current blockade operation
"""
# Just stop the timer. It is possible that it was too late and the
# timer is about to run
_logger.info("Stopping chaos for blockade %s" % self._blockade_name)
self._timer.cancel() |
def _sm_relieve_pain(self, *args, **kwargs):
"""
End the blockade event and return to a steady state
"""
_logger.info(
"Ending the degradation for blockade %s" % self._blockade_name)
self._do_reset_all()
# set a timer for the next pain event
millisec = random.randint(self._start_min_delay, self._start_max_delay)
self._timer = threading.Timer(millisec/1000.0, self.event_timeout)
self._timer.start() |
def _sm_stop_from_pain(self, *args, **kwargs):
"""
Stop chaos while there is a blockade event in progress
"""
_logger.info("Stopping chaos for blockade %s" % self._blockade_name)
self._do_reset_all() |
def _sm_cleanup(self, *args, **kwargs):
"""
Delete all state associated with the chaos session
"""
if self._done_notification_func is not None:
self._done_notification_func()
self._timer.cancel() |
def dependency_sorted(containers):
"""Sort a dictionary or list of containers into dependency order
Returns a sequence
"""
if not isinstance(containers, collections.Mapping):
containers = dict((c.name, c) for c in containers)
container_links = dict((name, set(c.links.keys()))
for name, c in containers.items())
sorted_names = _resolve(container_links)
return [containers[name] for name in sorted_names] |
def from_dict(name, values):
'''
Convert a dictionary of configuration values
into a sequence of BlockadeContainerConfig instances
'''
# determine the number of instances of this container
count = 1
count_value = values.get('count', 1)
if isinstance(count_value, int):
count = max(count_value, 1)
def with_index(name, idx):
if name and idx:
return '%s_%d' % (name, idx)
return name
def get_instance(n, idx=None):
return BlockadeContainerConfig(
with_index(n, idx),
values['image'],
command=values.get('command'),
links=values.get('links'),
volumes=values.get('volumes'),
publish_ports=values.get('ports'),
expose_ports=values.get('expose'),
environment=values.get('environment'),
hostname=values.get('hostname'),
dns=values.get('dns'),
start_delay=values.get('start_delay', 0),
neutral=values.get('neutral', False),
holy=values.get('holy', False),
container_name=with_index(values.get('container_name'), idx),
cap_add=values.get('cap_add'))
if count == 1:
yield get_instance(name)
else:
for idx in range(1, count+1):
# TODO: configurable name/index format
yield get_instance(name, idx) |
def from_dict(values):
'''
Instantiate a BlockadeConfig instance based on
a given dictionary of configuration values
'''
try:
containers = values['containers']
parsed_containers = {}
for name, container_dict in containers.items():
try:
# one config entry might result in many container
# instances (indicated by the 'count' config value)
for cnt in BlockadeContainerConfig.from_dict(name, container_dict):
# check for duplicate 'container_name' definitions
if cnt.container_name:
cname = cnt.container_name
existing = [c for c in parsed_containers.values() if c.container_name == cname]
if existing:
raise BlockadeConfigError("Duplicate 'container_name' definition: %s" % (cname))
parsed_containers[cnt.name] = cnt
except Exception as err:
raise BlockadeConfigError(
"Container '%s' config problem: %s" % (name, err))
network = values.get('network')
if network:
defaults = _DEFAULT_NETWORK_CONFIG.copy()
defaults.update(network)
network = defaults
else:
network = _DEFAULT_NETWORK_CONFIG.copy()
return BlockadeConfig(parsed_containers, network=network)
except KeyError as err:
raise BlockadeConfigError("Config missing value: " + str(err))
except Exception as err:
# TODO log this to some debug stream?
raise BlockadeConfigError("Failed to load config: " + str(err)) |
def cmd_up(opts):
"""Start the containers and link them together
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
containers = b.create(verbose=opts.verbose, force=opts.force)
print_containers(containers, opts.json) |
def cmd_destroy(opts):
"""Destroy all containers and restore networks
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
b.destroy() |
def cmd_status(opts):
"""Print status of containers and networks
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
containers = b.status()
print_containers(containers, opts.json) |
def cmd_kill(opts):
"""Kill some or all containers
"""
kill_signal = opts.signal if hasattr(opts, 'signal') else "SIGKILL"
__with_containers(opts, Blockade.kill, signal=kill_signal) |
def cmd_partition(opts):
"""Partition the network between containers
Replaces any existing partitions outright. Any containers NOT specified
in arguments will be globbed into a single implicit partition. For
example if you have three containers: c1, c2, and c3 and you run:
blockade partition c1
The result will be a partition with just c1 and another partition with
c2 and c3.
Alternatively, --random may be specified, and zero or more random
partitions will be generated by blockade.
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
if opts.random:
if opts.partitions:
raise BlockadeError("Either specify individual partitions "
"or --random, but not both")
b.random_partition()
else:
partitions = []
for partition in opts.partitions:
names = []
for name in partition.split(","):
name = name.strip()
if name:
names.append(name)
partitions.append(names)
if not partitions:
raise BlockadeError("Either specify individual partitions "
"or random")
b.partition(partitions) |
def cmd_join(opts):
"""Restore full networking between containers
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
b.join() |
def cmd_logs(opts):
"""Fetch the logs of a container
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
puts(b.logs(opts.container).decode(encoding='UTF-8')) |
def cmd_daemon(opts):
"""Start the Blockade REST API
"""
if opts.data_dir is None:
raise BlockadeError("You must supply a data directory for the daemon")
rest.start(data_dir=opts.data_dir, port=opts.port, debug=opts.debug,
host_exec=get_host_exec()) |
def cmd_add(opts):
"""Add one or more existing Docker containers to a Blockade group
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
b.add_container(opts.containers) |
def cmd_events(opts):
"""Get the event log for a given blockade
"""
config = load_config(opts.config)
b = get_blockade(config, opts)
if opts.json:
outf = None
_write = puts
if opts.output is not None:
outf = open(opts.output, "w")
_write = outf.write
try:
delim = ""
logs = b.get_audit().read_logs(as_json=False)
_write('{"events": [')
_write(os.linesep)
for l in logs:
_write(delim + l)
delim = "," + os.linesep
_write(os.linesep)
_write(']}')
finally:
if opts.output is not None:
outf.close()
else:
puts(colored.blue(columns(["EVENT", 10],
["TARGET", 16],
["STATUS", 8],
["TIME", 16],
["MESSAGE", 25])))
logs = b.get_audit().read_logs(as_json=True)
for l in logs:
puts(columns([l['event'], 10],
[str([str(t) for t in l['targets']]), 16],
[l['status'], 8],
[str(l['timestamp']), 16],
[l['message'], 25])) |
def set_cors_headers(resp, options):
"""
Performs the actual evaluation of Flas-CORS options and actually
modifies the response object.
This function is used both in the decorator and the after_request
callback
"""
# If CORS has already been evaluated via the decorator, skip
if hasattr(resp, FLASK_CORS_EVALUATED):
LOG.debug('CORS have been already evaluated, skipping')
return resp
# Some libraries, like OAuthlib, set resp.headers to non Multidict
# objects (Werkzeug Headers work as well). This is a problem because
# headers allow repeated values.
if (not isinstance(resp.headers, Headers)
and not isinstance(resp.headers, MultiDict)):
resp.headers = MultiDict(resp.headers)
headers_to_set = get_cors_headers(options, request.headers, request.method)
LOG.debug('Settings CORS headers: %s', str(headers_to_set))
for k, v in headers_to_set.items():
resp.headers.add(k, v)
return resp |
def try_match(request_origin, maybe_regex):
"""Safely attempts to match a pattern or string to a request origin."""
if isinstance(maybe_regex, RegexObject):
return re.match(maybe_regex, request_origin)
elif probably_regex(maybe_regex):
return re.match(maybe_regex, request_origin, flags=re.IGNORECASE)
else:
try:
return request_origin.lower() == maybe_regex.lower()
except AttributeError:
return request_origin == maybe_regex |
def get_cors_options(appInstance, *dicts):
"""
Compute CORS options for an application by combining the DEFAULT_OPTIONS,
the app's configuration-specified options and any dictionaries passed. The
last specified option wins.
"""
options = DEFAULT_OPTIONS.copy()
options.update(get_app_kwarg_dict(appInstance))
if dicts:
for d in dicts:
options.update(d)
return serialize_options(options) |
def get_app_kwarg_dict(appInstance=None):
"""Returns the dictionary of CORS specific app configurations."""
app = (appInstance or current_app)
# In order to support blueprints which do not have a config attribute
app_config = getattr(app, 'config', {})
return {
k.lower().replace('cors_', ''): app_config.get(k)
for k in CONFIG_OPTIONS
if app_config.get(k) is not None
} |
def ensure_iterable(inst):
"""
Wraps scalars or string types as a list, or returns the iterable instance.
"""
if isinstance(inst, string_types):
return [inst]
elif not isinstance(inst, collections.Iterable):
return [inst]
else:
return inst |
def serialize_options(opts):
"""
A helper method to serialize and processes the options dictionary.
"""
options = (opts or {}).copy()
for key in opts.keys():
if key not in DEFAULT_OPTIONS:
LOG.warning("Unknown option passed to Flask-CORS: %s", key)
# Ensure origins is a list of allowed origins with at least one entry.
options['origins'] = sanitize_regex_param(options.get('origins'))
options['allow_headers'] = sanitize_regex_param(options.get('allow_headers'))
# This is expressly forbidden by the spec. Raise a value error so people
# don't get burned in production.
if r'.*' in options['origins'] and options['supports_credentials'] and options['send_wildcard']:
raise ValueError("Cannot use supports_credentials in conjunction with"
"an origin string of '*'. See: "
"http://www.w3.org/TR/cors/#resource-requests")
serialize_option(options, 'expose_headers')
serialize_option(options, 'methods', upper=True)
if isinstance(options.get('max_age'), timedelta):
options['max_age'] = str(int(options['max_age'].total_seconds()))
return options |
def cross_origin(*args, **kwargs):
"""
This function is the decorator which is used to wrap a Flask route with.
In the simplest case, simply use the default parameters to allow all
origins in what is the most permissive configuration. If this method
modifies state or performs authentication which may be brute-forced, you
should add some degree of protection, such as Cross Site Forgery
Request protection.
:param origins:
The origin, or list of origins to allow requests from.
The origin(s) may be regular expressions, case-sensitive strings,
or else an asterisk
Default : '*'
:type origins: list, string or regex
:param methods:
The method or list of methods which the allowed origins are allowed to
access for non-simple requests.
Default : [GET, HEAD, POST, OPTIONS, PUT, PATCH, DELETE]
:type methods: list or string
:param expose_headers:
The header or list which are safe to expose to the API of a CORS API
specification.
Default : None
:type expose_headers: list or string
:param allow_headers:
The header or list of header field names which can be used when this
resource is accessed by allowed origins. The header(s) may be regular
expressions, case-sensitive strings, or else an asterisk.
Default : '*', allow all headers
:type allow_headers: list, string or regex
:param supports_credentials:
Allows users to make authenticated requests. If true, injects the
`Access-Control-Allow-Credentials` header in responses. This allows
cookies and credentials to be submitted across domains.
:note: This option cannot be used in conjuction with a '*' origin
Default : False
:type supports_credentials: bool
:param max_age:
The maximum time for which this CORS request maybe cached. This value
is set as the `Access-Control-Max-Age` header.
Default : None
:type max_age: timedelta, integer, string or None
:param send_wildcard: If True, and the origins parameter is `*`, a wildcard
`Access-Control-Allow-Origin` header is sent, rather than the
request's `Origin` header.
Default : False
:type send_wildcard: bool
:param vary_header:
If True, the header Vary: Origin will be returned as per the W3
implementation guidelines.
Setting this header when the `Access-Control-Allow-Origin` is
dynamically generated (e.g. when there is more than one allowed
origin, and an Origin than '*' is returned) informs CDNs and other
caches that the CORS headers are dynamic, and cannot be cached.
If False, the Vary header will never be injected or altered.
Default : True
:type vary_header: bool
:param automatic_options:
Only applies to the `cross_origin` decorator. If True, Flask-CORS will
override Flask's default OPTIONS handling to return CORS headers for
OPTIONS requests.
Default : True
:type automatic_options: bool
"""
_options = kwargs
def decorator(f):
LOG.debug("Enabling %s for cross_origin using options:%s", f, _options)
# If True, intercept OPTIONS requests by modifying the view function,
# replicating Flask's default behavior, and wrapping the response with
# CORS headers.
#
# If f.provide_automatic_options is unset or True, Flask's route
# decorator (which is actually wraps the function object we return)
# intercepts OPTIONS handling, and requests will not have CORS headers
if _options.get('automatic_options', True):
f.required_methods = getattr(f, 'required_methods', set())
f.required_methods.add('OPTIONS')
f.provide_automatic_options = False
def wrapped_function(*args, **kwargs):
# Handle setting of Flask-Cors parameters
options = get_cors_options(current_app, _options)
if options.get('automatic_options') and request.method == 'OPTIONS':
resp = current_app.make_default_options_response()
else:
resp = make_response(f(*args, **kwargs))
set_cors_headers(resp, options)
setattr(resp, FLASK_CORS_EVALUATED, True)
return resp
return update_wrapper(wrapped_function, f)
return decorator |
def calendar(type='holiday', direction='next', last=1, startDate=None, token='', version=''):
'''This call allows you to fetch a number of trade dates or holidays from a given date. For example, if you want the next trading day, you would call /ref-data/us/dates/trade/next/1.
https://iexcloud.io/docs/api/#u-s-exchanges
8am, 9am, 12pm, 1pm UTC daily
Args:
type (string); "holiday" or "trade"
direction (string); "next" or "last"
last (int); number to move in direction
startDate (date); start date for next or last, YYYYMMDD
token (string); Access token
version (string); API version
Returns:
dict: result
'''
if startDate:
startDate = _strOrDate(startDate)
return _getJson('ref-data/us/dates/{type}/{direction}/{last}/{date}'.format(type=type, direction=direction, last=last, date=startDate), token, version)
return _getJson('ref-data/us/dates/' + type + '/' + direction + '/' + str(last), token, version) |
def calendarDF(type='holiday', direction='next', last=1, startDate=None, token='', version=''):
'''This call allows you to fetch a number of trade dates or holidays from a given date. For example, if you want the next trading day, you would call /ref-data/us/dates/trade/next/1.
https://iexcloud.io/docs/api/#u-s-exchanges
8am, 9am, 12pm, 1pm UTC daily
Args:
type (string); "holiday" or "trade"
direction (string); "next" or "last"
last (int); number to move in direction
startDate (date); start date for next or last, YYYYMMDD
token (string); Access token
version (string); API version
Returns:
dict: result
'''
dat = pd.DataFrame(calendar(type, direction, last, startDate, token, version))
_toDatetime(dat)
return dat |
def holidays(direction='next', last=1, startDate=None, token='', version=''):
'''This call allows you to fetch a number of trade dates or holidays from a given date. For example, if you want the next trading day, you would call /ref-data/us/dates/trade/next/1.
https://iexcloud.io/docs/api/#u-s-exchanges
8am, 9am, 12pm, 1pm UTC daily
Args:
direction (string); "next" or "last"
last (int); number to move in direction
startDate (date); start date for next or last, YYYYMMDD
token (string); Access token
version (string); API version
Returns:
dict: result
'''
return calendar('holiday', direction, last, startDate, token, version) |
def holidaysDF(direction='next', last=1, startDate=None, token='', version=''):
'''This call allows you to fetch a number of trade dates or holidays from a given date. For example, if you want the next trading day, you would call /ref-data/us/dates/trade/next/1.
https://iexcloud.io/docs/api/#u-s-exchanges
8am, 9am, 12pm, 1pm UTC daily
Args:
direction (string); "next" or "last"
last (int); number to move in direction
startDate (date); start date for next or last, YYYYMMDD
token (string); Access token
version (string); API version
Returns:
dict: result
'''
return calendarDF('holiday', direction, last, startDate, token, version) |
def internationalSymbols(region='', exchange='', token='', version=''):
'''This call returns an array of international symbols that IEX Cloud supports for API calls.
https://iexcloud.io/docs/api/#international-symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
region (string); region, 2 letter case insensitive string of country codes using ISO 3166-1 alpha-2
exchange (string): Case insensitive string of Exchange using IEX Supported Exchanges list
token (string); Access token
version (string); API version
Returns:
dict: result
'''
if region:
return _getJson('ref-data/region/{region}/symbols'.format(region=region), token, version)
elif exchange:
return _getJson('ref-data/exchange/{exchange}/exchange'.format(exchange=exchange), token, version)
return _getJson('ref-data/region/us/symbols', token, version) |
def symbolsDF(token='', version=''):
'''This call returns an array of symbols that IEX Cloud supports for API calls.
https://iexcloud.io/docs/api/#symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
token (string); Access token
version (string); API version
Returns:
dataframe: result
'''
df = pd.DataFrame(symbols(token, version))
_toDatetime(df)
_reindex(df, 'symbol')
return df |
def iexSymbolsDF(token='', version=''):
'''This call returns an array of symbols the Investors Exchange supports for trading.
This list is updated daily as of 7:45 a.m. ET. Symbols may be added or removed by the Investors Exchange after the list was produced.
https://iexcloud.io/docs/api/#iex-symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
token (string); Access token
version (string); API version
Returns:
DataFrame: result
'''
df = pd.DataFrame(iexSymbols(token, version))
_toDatetime(df)
_reindex(df, 'symbol')
return df |
def mutualFundSymbolsDF(token='', version=''):
'''This call returns an array of mutual fund symbols that IEX Cloud supports for API calls.
https://iexcloud.io/docs/api/#mutual-fund-symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
token (string); Access token
version (string); API version
Returns:
DataFrame: result
'''
df = pd.DataFrame(mutualFundSymbols(token, version))
_toDatetime(df)
_reindex(df, 'symbol')
return df |
def otcSymbolsDF(token='', version=''):
'''This call returns an array of OTC symbols that IEX Cloud supports for API calls.
https://iexcloud.io/docs/api/#otc-symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
token (string); Access token
version (string); API version
Returns:
DataFrame: result
'''
df = pd.DataFrame(otcSymbols(token, version))
_toDatetime(df)
_reindex(df, 'symbol')
return df |
def internationalSymbolsDF(region='', exchange='', token='', version=''):
'''This call returns an array of international symbols that IEX Cloud supports for API calls.
https://iexcloud.io/docs/api/#international-symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
region (string); region, 2 letter case insensitive string of country codes using ISO 3166-1 alpha-2
exchange (string): Case insensitive string of Exchange using IEX Supported Exchanges list
token (string); Access token
version (string); API version
Returns:
DataFrame: result
'''
df = pd.DataFrame(internationalSymbols(region, exchange, token, version))
_toDatetime(df)
_reindex(df, 'symbol')
return df |
def internationalSymbolsList(region='', exchange='', token='', version=''):
'''This call returns an array of international symbols that IEX Cloud supports for API calls.
https://iexcloud.io/docs/api/#international-symbols
8am, 9am, 12pm, 1pm UTC daily
Args:
region (string); region, 2 letter case insensitive string of country codes using ISO 3166-1 alpha-2
exchange (string): Case insensitive string of Exchange using IEX Supported Exchanges list
token (string); Access token
version (string); API version
Returns:
list: result
'''
return internationalSymbolsDF(region, exchange, token, version).index.tolist() |
def marketsDF(token='', version=''):
'''https://iextrading.com/developer/docs/#intraday'''
df = pd.DataFrame(markets(token, version))
_toDatetime(df)
return df |
def _getJson(url, token='', version=''):
'''for backwards compat, accepting token and version but ignoring'''
if token:
return _getJsonIEXCloud(url, token, version)
return _getJsonOrig(url) |
def _getJsonOrig(url):
'''internal'''
url = _URL_PREFIX + url
resp = requests.get(urlparse(url).geturl(), proxies=_PYEX_PROXIES)
if resp.status_code == 200:
return resp.json()
raise PyEXception('Response %d - ' % resp.status_code, resp.text) |
def _getJsonIEXCloud(url, token='', version='beta'):
'''for iex cloud'''
url = _URL_PREFIX2.format(version=version) + url
resp = requests.get(urlparse(url).geturl(), proxies=_PYEX_PROXIES, params={'token': token})
if resp.status_code == 200:
return resp.json()
raise PyEXception('Response %d - ' % resp.status_code, resp.text) |
def _strOrDate(st):
'''internal'''
if isinstance(st, string_types):
return st
elif isinstance(st, datetime):
return st.strftime('%Y%m%d')
raise PyEXception('Not a date: %s', str(st)) |
def _raiseIfNotStr(s):
'''internal'''
if s is not None and not isinstance(s, string_types):
raise PyEXception('Cannot use type %s' % str(type(s))) |
def _tryJson(data, raw=True):
'''internal'''
if raw:
return data
try:
return json.loads(data)
except ValueError:
return data |
def _stream(url, sendinit=None, on_data=print):
'''internal'''
cl = WSClient(url, sendinit=sendinit, on_data=on_data)
return cl |
def _streamSSE(url, on_data=print, accrue=False):
'''internal'''
messages = SSEClient(url)
if accrue:
ret = []
for msg in messages:
data = msg.data
on_data(json.loads(data))
if accrue:
ret.append(msg)
return ret |
def _reindex(df, col):
'''internal'''
if col in df.columns:
df.set_index(col, inplace=True) |
def _toDatetime(df, cols=None, tcols=None):
'''internal'''
cols = cols or _STANDARD_DATE_FIELDS
tcols = tcols = _STANDARD_TIME_FIELDS
for col in cols:
if col in df:
df[col] = pd.to_datetime(df[col], infer_datetime_format=True, errors='coerce')
for tcol in tcols:
if tcol in df:
df[tcol] = pd.to_datetime(df[tcol], unit='ms', errors='coerce') |
def balanceSheet(symbol, token='', version=''):
'''Pulls balance sheet data. Available quarterly (4 quarters) and annually (4 years)
https://iexcloud.io/docs/api/#balance-sheet
Updates at 8am, 9am UTC daily
Args:
symbol (string); Ticker to request
token (string); Access token
version (string); API version
Returns:
dict: result
'''
_raiseIfNotStr(symbol)
return _getJson('stock/' + symbol + '/balance-sheet', token, version) |
def balanceSheetDF(symbol, token='', version=''):
'''Pulls balance sheet data. Available quarterly (4 quarters) and annually (4 years)
https://iexcloud.io/docs/api/#balance-sheet
Updates at 8am, 9am UTC daily
Args:
symbol (string); Ticker to request
token (string); Access token
version (string); API version
Returns:
DataFrame: result
'''
val = balanceSheet(symbol, token, version)
df = pd.io.json.json_normalize(val, 'balancesheet', 'symbol')
_toDatetime(df)
_reindex(df, 'reportDate')
return df |
def batch(symbols, fields=None, range_='1m', last=10, token='', version=''):
'''Batch several data requests into one invocation
https://iexcloud.io/docs/api/#batch-requests
Args:
symbols (list); List of tickers to request
fields (list); List of fields to request
range_ (string); Date range for chart
last (int);
token (string); Access token
version (string); API version
Returns:
dict: results in json
'''
fields = fields or _BATCH_TYPES[:10] # limit 10
if not isinstance(symbols, [].__class__):
if not isinstance(symbols, str):
raise PyEXception('batch expects string or list of strings for symbols argument')
if isinstance(fields, str):
fields = [fields]
if range_ not in _TIMEFRAME_CHART:
raise PyEXception('Range must be in %s' % str(_TIMEFRAME_CHART))
if isinstance(symbols, str):
route = 'stock/{}/batch?types={}&range={}&last={}'.format(symbols, ','.join(fields), range_, last)
return _getJson(route, token, version)
if len(symbols) > 100:
raise PyEXception('IEX will only handle up to 100 symbols at a time!')
route = 'stock/market/batch?symbols={}&types={}&range={}&last={}'.format(','.join(symbols), ','.join(fields), range_, last)
return _getJson(route, token, version) |
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