/usr/share/pyshared/txaws/exception.py is in python-txaws 0.2.3-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | # Copyright (c) 2009 Canonical Ltd <duncan.mcgreggor@canonical.com>
# Licenced under the txaws licence available at /LICENSE in the txaws source.
from twisted.web.error import Error
from txaws.util import XML
class AWSError(Error):
"""
A base class for txAWS errors.
"""
def __init__(self, xml_bytes, status, message=None, response=None):
super(AWSError, self).__init__(status, message, response)
if not xml_bytes:
raise ValueError("XML cannot be empty.")
self.original = xml_bytes
self.errors = []
self.request_id = ""
self.host_id = ""
self.parse()
def __str__(self):
return self._get_error_message_string()
def __repr__(self):
return "<%s object with %s>" % (
self.__class__.__name__, self._get_error_code_string())
def _set_request_id(self, tree):
request_id_node = tree.find(".//RequestID")
if hasattr(request_id_node, "text"):
text = request_id_node.text
if text:
self.request_id = text
def _set_host_id(self, tree):
host_id = tree.find(".//HostID")
if hasattr(host_id, "text"):
text = host_id.text
if text:
self.host_id = text
def _get_error_code_string(self):
count = len(self.errors)
error_code = self.get_error_codes()
if count > 1:
return "Error count: %s" % error_code
else:
return "Error code: %s" % error_code
def _get_error_message_string(self):
count = len(self.errors)
error_message = self.get_error_messages()
if count > 1:
return "%s." % error_message
else:
return "Error Message: %s" % error_message
def _node_to_dict(self, node):
data = {}
for child in node:
if child.tag and child.text:
data[child.tag] = child.text
return data
def _check_for_html(self, tree):
if tree.tag == "html":
message = "Could not parse HTML in the response."
raise AWSResponseParseError(message)
def _set_400_error(self, tree):
"""
This method needs to be implemented by subclasses.
"""
def _set_500_error(self, tree):
self._set_request_id(tree)
self._set_host_id(tree)
data = self._node_to_dict(tree)
if data:
self.errors.append(data)
def parse(self, xml_bytes=""):
if not xml_bytes:
xml_bytes = self.original
self.original = xml_bytes
tree = XML(xml_bytes.strip())
self._check_for_html(tree)
self._set_request_id(tree)
if self.status:
status = int(self.status)
else:
status = 400
if status >= 500:
self._set_500_error(tree)
else:
self._set_400_error(tree)
def has_error(self, errorString):
for error in self.errors:
if errorString in error.values():
return True
return False
def get_error_codes(self):
count = len(self.errors)
if count > 1:
return count
elif count == 0:
return
else:
return self.errors[0]["Code"]
def get_error_messages(self):
count = len(self.errors)
if count > 1:
return "Multiple EC2 Errors"
elif count == 0:
return "Empty error list"
else:
return self.errors[0]["Message"]
class AWSResponseParseError(Exception):
"""
txAWS was unable to parse the server response.
"""
class CertsNotFoundError(Exception):
"""
txAWS was not able to find any SSL certificates.
"""
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