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annotate planemo/lib/python3.7/site-packages/boto/sqs/bigmessage.py @ 0:d30785e31577 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:18:57 -0400
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1 # Copyright (c) 2013 Mitch Garnaat http://garnaat.org/
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2 # Copyright (c) 2013 Amazon.com, Inc. or its affiliates.
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3 #
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4 # Permission is hereby granted, free of charge, to any person obtaining a
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5 # copy of this software and associated documentation files (the
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6 # "Software"), to deal in the Software without restriction, including
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7 # without limitation the rights to use, copy, modify, merge, publish, dis-
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8 # tribute, sublicense, and/or sell copies of the Software, and to permit
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9 # persons to whom the Software is furnished to do so, subject to the fol-
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10 # lowing conditions:
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11 #
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12 # The above copyright notice and this permission notice shall be included
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13 # in all copies or substantial portions of the Software.
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14 #
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15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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16 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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17 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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18 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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19 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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21 # IN THE SOFTWARE.
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22
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23 import uuid
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24
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25 import boto
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26 from boto.sqs.message import RawMessage
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27 from boto.exception import SQSDecodeError
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28
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29
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30 class BigMessage(RawMessage):
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31 """
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32 The BigMessage class provides large payloads (up to 5GB)
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33 by storing the payload itself in S3 and then placing a reference
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34 to the S3 object in the actual SQS message payload.
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35
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36 To create a BigMessage, you should create a BigMessage object
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37 and pass in a file-like object as the ``body`` param and also
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38 pass in the an S3 URL specifying the bucket in which to store
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39 the message body::
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40
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41 import boto.sqs
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42 from boto.sqs.bigmessage import BigMessage
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43
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44 sqs = boto.sqs.connect_to_region('us-west-2')
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45 queue = sqs.get_queue('myqueue')
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46 fp = open('/path/to/bigmessage/data')
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47 msg = BigMessage(queue, fp, 's3://mybucket')
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48 queue.write(msg)
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49
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50 Passing in a fully-qualified S3 URL (e.g. s3://mybucket/foo)
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51 is interpreted to mean that the body of the message is already
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52 stored in S3 and the that S3 URL is then used directly with no
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53 content uploaded by BigMessage.
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54 """
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55
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56 def __init__(self, queue=None, body=None, s3_url=None):
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57 self.s3_url = s3_url
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58 super(BigMessage, self).__init__(queue, body)
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59
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60 def _get_bucket_key(self, s3_url):
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61 bucket_name = key_name = None
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62 if s3_url:
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63 if s3_url.startswith('s3://'):
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64 # We need to split out the bucket from the key (if
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65 # supplied). We also have to be aware that someone
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66 # may provide a trailing '/' character as in:
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67 # s3://foo/ and we want to handle that.
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68 s3_components = s3_url[5:].split('/', 1)
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69 bucket_name = s3_components[0]
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70 if len(s3_components) > 1:
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71 if s3_components[1]:
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72 key_name = s3_components[1]
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73 else:
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74 msg = 's3_url parameter should start with s3://'
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75 raise SQSDecodeError(msg, self)
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76 return bucket_name, key_name
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77
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78 def encode(self, value):
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79 """
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80 :type value: file-like object
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81 :param value: A file-like object containing the content
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82 of the message. The actual content will be stored
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83 in S3 and a link to the S3 object will be stored in
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84 the message body.
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85 """
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86 bucket_name, key_name = self._get_bucket_key(self.s3_url)
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87 if bucket_name and key_name:
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88 return self.s3_url
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89 key_name = uuid.uuid4()
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90 s3_conn = boto.connect_s3()
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91 s3_bucket = s3_conn.get_bucket(bucket_name)
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92 key = s3_bucket.new_key(key_name)
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93 key.set_contents_from_file(value)
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94 self.s3_url = 's3://%s/%s' % (bucket_name, key_name)
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95 return self.s3_url
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96
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97 def _get_s3_object(self, s3_url):
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98 bucket_name, key_name = self._get_bucket_key(s3_url)
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99 if bucket_name and key_name:
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100 s3_conn = boto.connect_s3()
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101 s3_bucket = s3_conn.get_bucket(bucket_name)
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102 key = s3_bucket.get_key(key_name)
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103 return key
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104 else:
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105 msg = 'Unable to decode S3 URL: %s' % s3_url
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106 raise SQSDecodeError(msg, self)
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107
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108 def decode(self, value):
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109 self.s3_url = value
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110 key = self._get_s3_object(value)
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111 return key.get_contents_as_string()
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112
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113 def delete(self):
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114 # Delete the object in S3 first, then delete the SQS message
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115 if self.s3_url:
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116 key = self._get_s3_object(self.s3_url)
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117 key.delete()
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118 super(BigMessage, self).delete()
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119