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# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
#
import json
from schematics.exceptions import DataError
from requests import RequestException
from requests import ConnectionError, HTTPError, Timeout
from osdf.operation.exceptions import BusinessException
import osdf
ERROR_TEMPLATE = osdf.ERROR_TEMPLATE
MESSAGE_BASE = "A solution couldn't be determined because an external application"
HTTP_ERROR_MESSAGE = MESSAGE_BASE + " returned a HTTP error"
TIMEOUT_ERROR_MESSAGE = MESSAGE_BASE + " could not respond in time, please check the external application"
CONNECTION_ERROR_MESSAGE = MESSAGE_BASE + " could not be reached"
internal_error_body = {
"serviceException": {
"text": "Unhandled internal exception, request could not be processed"
}
}
internal_error_message = json.dumps(internal_error_body)
def build_json_error_body(error):
if isinstance(error,RequestException):
return request_exception_to_json_body(error)
elif isinstance(error, DataError):
return data_error_to_json_body(error)
elif type(error) is BusinessException: # return the error message, because it is well formatted
return ERROR_TEMPLATE.render(description=str(error))
else:
return internal_error_message
def data_error_to_json_body(error):
description = str(error).replace('"', '\\"')
error_message = ERROR_TEMPLATE.render(description=description)
return error_message
def request_exception_to_json_body(error):
friendly_message = "A request exception has occurred when contacting an external system"
if type(error) is HTTPError:
friendly_message = HTTP_ERROR_MESSAGE
if type(error) is ConnectionError:
friendly_message = CONNECTION_ERROR_MESSAGE
if type(error) is Timeout:
friendly_message = TIMEOUT_ERROR_MESSAGE
eie_body = {
"serviceException": {
"text": friendly_message,
"errorType": "InterfaceError"
},
"externalApplicationDetails": {
"httpMethod": error.request.method,
"url": error.request.url
}
}
response = error.response
if response is not None:
eie_body['externalApplicationDetails']['httpStatusCode'] = response.status_code
content_type = response.headers.get('content-type')
if content_type is not None:
if 'application/json' in content_type:
eie_body['externalApplicationDetails']['responseMessage'] = response.json()
elif 'text/html' in content_type:
eie_body['externalApplicationDetails']['responseMessage'] = response.text
error_message = json.dumps(eie_body)
return error_message
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