def before_request():
"""This function is run before the request is handled by Flask. It is used
to connect to MySQL and Redis, and to tell old Internet Explorer versions
to go away.
"""
# Check for MSIE version <= 10.0
if (request.user_agent.browser == "msie" and int(round(float(request.user_agent.version))) <= 10):
return render_template('foad.html')
# Connect to redis
try:
g.redis = redis.StrictRedis(host=app.config['REDIS_HOST'], port=app.config['REDIS_PORT'], db=0)
g.redis.get('foo') # it doesnt matter that this key doesnt exist, its just to force a test call to redis.
except Exception as ex:
logerr()
return fatalerr(message='Cortex could not connect to the REDIS server')
# Connect to database
try:
g.db = mysql.connect(host=app.config['MYSQL_HOST'], port=app.config['MYSQL_PORT'], user=app.config['MYSQL_USER'], passwd=app.config['MYSQL_PASS'], db=app.config['MYSQL_NAME'], charset="utf8")
except Exception as ex:
logerr()
return fatalerr(message='Cortex could not connect to the MariaDB server')
# This would ideally go in app.py, but it can't as it depends on
# cortex.lib.user which it can't import due to a cyclic dependency
app.jinja_env.globals['does_user_have_permission'] = does_user_have_permission
app.jinja_env.globals['does_user_have_system_permission'] = does_user_have_system_permission
def before_request():
"""This function is run before the request is handled by Flask. It is used
to connect to MySQL and Redis, and to tell old Internet Explorer versions
to go away.
"""
# Check for MSIE version <= 10.0
if (request.user_agent.browser == "msie" and int(round(float(request.user_agent.version))) <= 10):
return render_template('foad.html')
# Connect to redis
try:
g.redis = redis.StrictRedis(host=app.config['REDIS_HOST'], port=app.config['REDIS_PORT'], db=0)
g.redis.get('foo') # it doesnt matter that this key doesnt exist, its just to force a test call to redis.
except Exception as ex:
logerr()
return fatalerr(message='Cortex could not connect to the REDIS server')
# Connect to database
try:
g.db = mysql.connect(host=app.config['MYSQL_HOST'], port=app.config['MYSQL_PORT'], user=app.config['MYSQL_USER'], passwd=app.config['MYSQL_PASS'], db=app.config['MYSQL_NAME'], charset="utf8")
except Exception as ex:
logerr()
return fatalerr(message='Cortex could not connect to the MariaDB server')
# This would ideally go in app.py, but it can't as it depends on
# cortex.lib.user which it can't import due to a cyclic dependency
app.jinja_env.globals['does_user_have_permission'] = does_user_have_permission
app.jinja_env.globals['does_user_have_system_permission'] = does_user_have_system_permission
def error_handler(error):
"""Handles generic exceptions within the application, displaying the
traceback if the application is running in debug mode."""
# Record the error in the log
logerr()
## If we're handling a workflow view handler we don't need to show the fatal
## error screen, instead we'll use a standard error screen. the fatal error
## screen exists in case a flaw occurs which prevents rendering of the
## layout - but that can't happen with a workflow.
if 'workflow' in g:
if g.workflow:
app.logger.warn("Workflow error occured")
return stderr(
"Workflow error",
"An error occured in the workflow function - " +
type(error).__name__ + ": " + str(error))
# Get the traceback
if app.debug:
debug = traceback.format_exc()
else:
debug = "Ask your system administrator to consult the error log for this application."
# Output a fatal error
return fatalerr(debug=debug)
def neocortex_connect():
"""This function connects to the neocortex job daemon using the Pyro4
Remote Procedure Call (RPC) library."""
# Connect, and perform some set up, including setting up a pre-shared
# message signing key
proxy = Pyro4.Proxy('PYRO:neocortex@localhost:1888')
proxy._pyroHmacKey = app.config['NEOCORTEX_KEY']
proxy._pyroTimeout = 5
# Ping the server to ensure it's alive
try:
proxy.ping()
except Pyro4.errors.PyroError as ex:
abort(fatalerr(message="An error occured when connecting to the neocortex task engine: " + str(ex)))
return proxy
def neocortex_connect():
"""This function connects to the neocortex job daemon using the Pyro4
Remote Procedure Call (RPC) library."""
# Connect, and perform some set up, including setting up a pre-shared
# message signing key
proxy = Pyro4.Proxy('PYRO:neocortex@localhost:1888')
proxy._pyroHmacKey = app.config['NEOCORTEX_KEY']
proxy._pyroTimeout = 5
# Ping the server to ensure it's alive
try:
proxy.ping()
except Pyro4.errors.PyroError as ex:
abort(fatalerr(message="An error occured when connecting to the neocortex task engine: " + str(ex)))
return proxy
def error_handler(error):
"""Handles generic exceptions within the application, displaying the
traceback if the application is running in debug mode."""
# Record the error in the log
logerr()
## If we're handling a workflow view handler we don't need to show the fatal
## error screen, instead we'll use a standard error screen. the fatal error
## screen exists in case a flaw occurs which prevents rendering of the
## layout - but that can't happen with a workflow.
if 'workflow' in g:
if g.workflow:
app.logger.warn("Workflow error occured")
return stderr("Workflow error","An error occured in the workflow function - " + type(error).__name__ + ": " + str(error))
# Get the traceback
if app.debug:
debug = traceback.format_exc()
else:
debug = "Ask your system administrator to consult the error log for this application."
# Output a fatal error
return fatalerr(debug=debug)