55 lines
2.1 KiB
Python
55 lines
2.1 KiB
Python
from __future__ import unicode_literals
|
|
import random
|
|
import string
|
|
|
|
from .exceptions import MessageAttributesInvalid
|
|
|
|
|
|
def generate_receipt_handle():
|
|
# http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/ImportantIdentifiers.html#ImportantIdentifiers-receipt-handles
|
|
length = 185
|
|
return ''.join(random.choice(string.ascii_lowercase) for x in range(length))
|
|
|
|
|
|
def parse_message_attributes(querystring, base='', value_namespace='Value.'):
|
|
message_attributes = {}
|
|
index = 1
|
|
while True:
|
|
# Loop through looking for message attributes
|
|
name_key = base + 'MessageAttribute.{0}.Name'.format(index)
|
|
name = querystring.get(name_key)
|
|
if not name:
|
|
# Found all attributes
|
|
break
|
|
|
|
data_type_key = base + \
|
|
'MessageAttribute.{0}.{1}DataType'.format(index, value_namespace)
|
|
data_type = querystring.get(data_type_key)
|
|
if not data_type:
|
|
raise MessageAttributesInvalid(
|
|
"The message attribute '{0}' must contain non-empty message attribute value.".format(name[0]))
|
|
|
|
data_type_parts = data_type[0].split('.')
|
|
if len(data_type_parts) > 2 or data_type_parts[0] not in ['String', 'Binary', 'Number']:
|
|
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]))
|
|
|
|
type_prefix = 'String'
|
|
if data_type_parts[0] == 'Binary':
|
|
type_prefix = 'Binary'
|
|
|
|
value_key = base + \
|
|
'MessageAttribute.{0}.{1}{2}Value'.format(
|
|
index, value_namespace, type_prefix)
|
|
value = querystring.get(value_key)
|
|
if not value:
|
|
raise MessageAttributesInvalid(
|
|
"The message attribute '{0}' must contain non-empty message attribute value for message attribute type '{1}'.".format(name[0], data_type[0]))
|
|
|
|
message_attributes[name[0]] = {'data_type': data_type[
|
|
0], type_prefix.lower() + '_value': value[0]}
|
|
|
|
index += 1
|
|
|
|
return message_attributes
|