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Web socket integration dev prasanth #1

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3e46b4d
add web socket integration in handler
prasanthkumar-ib Aug 6, 2021
b92c9bf
write web socket handler to zappa settings file in cli.py
prasanthkumar-ib Aug 6, 2021
0776e1b
changed web socket identifier key to connectionId
prasanthkumar-ib Aug 7, 2021
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10 changes: 10 additions & 0 deletions zappa/cli.py
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,7 @@ class ZappaCLI(object):
environment_variables = None
authorizer = None
aws_kms_key_arn = ''
web_socket_handler = None

cognito_authorizer_path = '/'

Expand Down Expand Up @@ -1820,6 +1821,9 @@ def load_settings(self, settings_file=None, session=None):
self.aws_kms_key_arn = self.stage_config.get('aws_kms_key_arn', '')
self.cognito_authorizer_path = self.stage_config.get('cognito_authorizer_path', '/')

# custom zappa settings key for web socket
self.web_socket_handler = self.stage_config.get('web_socket_handler')

desired_role_name = self.lambda_name + "-ZappaLambdaExecutionRole"
self.zappa = Zappa( boto_session=session,
profile_name=self.profile_name,
Expand Down Expand Up @@ -2090,6 +2094,12 @@ def create_package(self, output=None):
if authorizer_function:
settings_s += "AUTHORIZER_FUNCTION='{0!s}'\n".format(authorizer_function)

# web socket function
if self.web_socket_handler:
settings_s += "WEB_SOCKET_HANDLER='{0!s}'\n".format(
self.web_socket_handler)
else:
settings_s += "WEB_SOCKET_HANDLER=None\n"

# Copy our Django app into root of our package.
# It doesn't work otherwise.
Expand Down
14 changes: 14 additions & 0 deletions zappa/handler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -425,6 +425,20 @@ def handler(self, event, context):
logger.error("Cannot find a function to process the authorization request.")
raise Exception('Unauthorized')

# this is a web socket event
elif event.get('requestContext') and \
event['requestContext'].get('connectionId'):
whole_function = self.settings.WEB_SOCKET_HANDLER
if whole_function:
app_function = self.import_module_and_get_function(
whole_function)
result = self.run_function(app_function, event, context)
return result
else:
logger.error(
"Cannot find a function to process the web socket request.")
raise Exception('Web socket request handler not found')

# Normal web app flow
try:
# Timing
Expand Down