60 lines
2.3 KiB
Python
60 lines
2.3 KiB
Python
from __future__ import unicode_literals
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import datetime
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import random
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import string
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from .exceptions import MessageAttributesInvalid
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def generate_receipt_handle():
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# http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/ImportantIdentifiers.html#ImportantIdentifiers-receipt-handles
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length = 185
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return ''.join(random.choice(string.ascii_lowercase) for x in range(length))
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def unix_time(dt=None):
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dt = dt or datetime.datetime.utcnow()
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epoch = datetime.datetime.utcfromtimestamp(0)
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delta = dt - epoch
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return (delta.days * 86400) + (delta.seconds + (delta.microseconds / 1e6))
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def unix_time_millis(dt=None):
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return unix_time(dt) * 1000.0
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def parse_message_attributes(querystring, base='', value_namespace='Value.'):
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message_attributes = {}
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index = 1
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while True:
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# Loop through looking for message attributes
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name_key = base + 'MessageAttribute.{0}.Name'.format(index)
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name = querystring.get(name_key)
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if not name:
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# Found all attributes
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break
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data_type_key = base + 'MessageAttribute.{0}.{1}DataType'.format(index, value_namespace)
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data_type = querystring.get(data_type_key)
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if not data_type:
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raise MessageAttributesInvalid("The message attribute '{0}' must contain non-empty message attribute value.".format(name[0]))
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data_type_parts = data_type[0].split('.')
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if len(data_type_parts) > 2 or data_type_parts[0] not in ['String', 'Binary', 'Number']:
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raise MessageAttributesInvalid("The message attribute '{0}' has an invalid message attribute type, the set of supported type prefixes is Binary, Number, and String.".format(name[0]))
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type_prefix = 'String'
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if data_type_parts[0] == 'Binary':
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type_prefix = 'Binary'
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value_key = base + 'MessageAttribute.{0}.{1}{2}Value'.format(index, value_namespace, type_prefix)
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value = querystring.get(value_key)
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if not value:
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raise MessageAttributesInvalid("The message attribute '{0}' must contain non-empty message attribute value for message attribute type '{1}'.".format(name[0], data_type[0]))
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message_attributes[name[0]] = {'data_type' : data_type[0], type_prefix.lower() + '_value' : value[0]}
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index += 1
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return message_attributes
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