aws-cli/awscli/customizations/awslambda.py at develop · TeamWaggles/aws-cli · GitHub

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# Licensed under the Apache License, Version 2.0 (the "License"). You

# may not use this file except in compliance with the License. A copy of

# the License is located at

# http://aws.amazon.com/apache2.0/

# or in the "license" file accompanying this file. This file 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 zipfile

import copy

from contextlib import closing

from awscli.arguments import CustomArgument, CLIArgument

from awscli.compat import BytesIO

ERROR_MSG = (

"--zip-file must be a zip file with the fileb:// prefix.\n"

"Example usage: --zip-file fileb://path/to/file.zip")

ZIP_DOCSTRING = (

'<p>The path to the zip file of the {param_type} you are uploading. '

'Specify --zip-file or --{param_type}, but not both. '

'Example: fileb://{param_type}.zip</p>'

)

def register_lambda_create_function(cli):

cli.register('building-argument-table.lambda.create-function',

ZipFileArgumentHoister('Code').hoist)

cli.register('building-argument-table.lambda.publish-layer-version',

ZipFileArgumentHoister('Content').hoist)

cli.register('building-argument-table.lambda.update-function-code',

_modify_zipfile_docstring)

cli.register('process-cli-arg.lambda.update-function-code',

validate_is_zip_file)

def validate_is_zip_file(cli_argument, value, **kwargs):

if cli_argument.name == 'zip-file':

_should_contain_zip_content(value)

class ZipFileArgumentHoister(object):

"""Hoists a ZipFile argument up to the top level.

Injects a top-level ZipFileArgument into the argument table which maps

a --zip-file parameter to the underlying ``serialized_name`` ZipFile

shape. Replaces the old ZipFile argument with an instance of

ReplacedZipFileArgument to prevent its usage and recommend the new

top-level injected parameter.

"""

def __init__(self, serialized_name):

self._serialized_name = serialized_name

self._name = serialized_name.lower()

def hoist(self, session, argument_table, **kwargs):

help_text = ZIP_DOCSTRING.format(param_type=self._name)

argument_table['zip-file'] = ZipFileArgument(

'zip-file', help_text=help_text, cli_type_name='blob',

serialized_name=self._serialized_name

)

argument = argument_table[self._name]

model = copy.deepcopy(argument.argument_model)

del model.members['ZipFile']

argument_table[self._name] = ReplacedZipFileArgument(

name=self._name,

argument_model=model,

operation_model=argument._operation_model,

is_required=False,

event_emitter=session.get_component('event_emitter'),

serialized_name=self._serialized_name,

)

def _modify_zipfile_docstring(session, argument_table, **kwargs):

if 'zip-file' in argument_table:

argument_table['zip-file'].documentation = ZIP_DOCSTRING

def _should_contain_zip_content(value):

if not isinstance(value, bytes):

# If it's not bytes it's basically impossible for

# this to be valid zip content, but we'll at least

# still try to load the contents as a zip file

# to be absolutely sure.

value = value.encode('utf-8')

fileobj = BytesIO(value)

try:

with closing(zipfile.ZipFile(fileobj)) as f:

f.infolist()

except zipfile.BadZipFile:

raise ValueError(ERROR_MSG)

class ZipFileArgument(CustomArgument):

"""A new ZipFile argument to be injected at the top level.

This class injects a ZipFile argument under the specified serialized_name

parameter. This can be used to take a top level parameter like --zip-file

and inject it into a nested different parameter like Code so

--zip-file foo.zip winds up being serialized as

{ 'Code': { 'ZipFile': <contents of foo.zip> } }.

"""

def __init__(self, *args, **kwargs):

self._param_to_replace = kwargs.pop('serialized_name')

super(ZipFileArgument, self).__init__(*args, **kwargs)

def add_to_params(self, parameters, value):

if value is None:

return

_should_contain_zip_content(value)

zip_file_param = {'ZipFile': value}

if parameters.get(self._param_to_replace):

parameters[self._param_to_replace].update(zip_file_param)

else:

parameters[self._param_to_replace] = zip_file_param

class ReplacedZipFileArgument(CLIArgument):

"""A replacement argument for nested ZipFile argument.

This prevents the use of a non-working nested argument that expects binary.

Instead an instance of ZipFileArgument should be injected at the top level

and used instead. That way fileb:// can be used to load the binary

contents. And the argument class can inject those bytes into the correct

serialization name.

"""

def __init__(self, *args, **kwargs):

super(ReplacedZipFileArgument, self).__init__(*args, **kwargs)

self._cli_name = '--%s' % kwargs['name']

self._param_to_replace = kwargs['serialized_name']

def add_to_params(self, parameters, value):

if value is None:

return

unpacked = self._unpack_argument(value)

if 'ZipFile' in unpacked:

raise ValueError(

"ZipFile cannot be provided "

"as part of the %s argument. "

"Please use the '--zip-file' "

"option instead to specify a zip file." % self._cli_name)

if parameters.get(self._param_to_replace):

parameters[self._param_to_replace].update(unpacked)

else:

parameters[self._param_to_replace] = unpacked

aws-cli/awscli/customizations/awslambda.py at develop · TeamWaggles/aws-cli · GitHub

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