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|
# Copyright (c) 2006-2009 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import uuid
import base64
import time
from boto.compat import json
from boto.cloudfront.identity import OriginAccessIdentity
from boto.cloudfront.object import Object, StreamingObject
from boto.cloudfront.signers import ActiveTrustedSigners, TrustedSigners
from boto.cloudfront.logging import LoggingInfo
from boto.cloudfront.origin import S3Origin, CustomOrigin
from boto.s3.acl import ACL
class DistributionConfig(object):
def __init__(self, connection=None, origin=None, enabled=False,
caller_reference='', cnames=None, comment='',
trusted_signers=None, default_root_object=None,
logging=None):
"""
:param origin: Origin information to associate with the
distribution. If your distribution will use
an Amazon S3 origin, then this should be an
S3Origin object. If your distribution will use
a custom origin (non Amazon S3), then this
should be a CustomOrigin object.
:type origin: :class:`boto.cloudfront.origin.S3Origin` or
:class:`boto.cloudfront.origin.CustomOrigin`
:param enabled: Whether the distribution is enabled to accept
end user requests for content.
:type enabled: bool
:param caller_reference: A unique number that ensures the
request can't be replayed. If no
caller_reference is provided, boto
will generate a type 4 UUID for use
as the caller reference.
:type enabled: str
:param cnames: A CNAME alias you want to associate with this
distribution. You can have up to 10 CNAME aliases
per distribution.
:type enabled: array of str
:param comment: Any comments you want to include about the
distribution.
:type comment: str
:param trusted_signers: Specifies any AWS accounts you want to
permit to create signed URLs for private
content. If you want the distribution to
use signed URLs, this should contain a
TrustedSigners object; if you want the
distribution to use basic URLs, leave
this None.
:type trusted_signers: :class`boto.cloudfront.signers.TrustedSigners`
:param default_root_object: Designates a default root object.
Only include a DefaultRootObject value
if you are going to assign a default
root object for the distribution.
:type comment: str
:param logging: Controls whether access logs are written for the
distribution. If you want to turn on access logs,
this should contain a LoggingInfo object; otherwise
it should contain None.
:type logging: :class`boto.cloudfront.logging.LoggingInfo`
"""
self.connection = connection
self.origin = origin
self.enabled = enabled
if caller_reference:
self.caller_reference = caller_reference
else:
self.caller_reference = str(uuid.uuid4())
self.cnames = []
if cnames:
self.cnames = cnames
self.comment = comment
self.trusted_signers = trusted_signers
self.logging = logging
self.default_root_object = default_root_object
def to_xml(self):
s = '<?xml version="1.0" encoding="UTF-8"?>\n'
s += '<DistributionConfig xmlns="http://cloudfront.amazonaws.com/doc/2010-07-15/">\n'
if self.origin:
s += self.origin.to_xml()
s += ' <CallerReference>%s</CallerReference>\n' % self.caller_reference
for cname in self.cnames:
s += ' <CNAME>%s</CNAME>\n' % cname
if self.comment:
s += ' <Comment>%s</Comment>\n' % self.comment
s += ' <Enabled>'
if self.enabled:
s += 'true'
else:
s += 'false'
s += '</Enabled>\n'
if self.trusted_signers:
s += '<TrustedSigners>\n'
for signer in self.trusted_signers:
if signer == 'Self':
s += ' <Self></Self>\n'
else:
s += ' <AwsAccountNumber>%s</AwsAccountNumber>\n' % signer
s += '</TrustedSigners>\n'
if self.logging:
s += '<Logging>\n'
s += ' <Bucket>%s</Bucket>\n' % self.logging.bucket
s += ' <Prefix>%s</Prefix>\n' % self.logging.prefix
s += '</Logging>\n'
if self.default_root_object:
dro = self.default_root_object
s += '<DefaultRootObject>%s</DefaultRootObject>\n' % dro
s += '</DistributionConfig>\n'
return s
def startElement(self, name, attrs, connection):
if name == 'TrustedSigners':
self.trusted_signers = TrustedSigners()
return self.trusted_signers
elif name == 'Logging':
self.logging = LoggingInfo()
return self.logging
elif name == 'S3Origin':
self.origin = S3Origin()
return self.origin
elif name == 'CustomOrigin':
self.origin = CustomOrigin()
return self.origin
else:
return None
def endElement(self, name, value, connection):
if name == 'CNAME':
self.cnames.append(value)
elif name == 'Comment':
self.comment = value
elif name == 'Enabled':
if value.lower() == 'true':
self.enabled = True
else:
self.enabled = False
elif name == 'CallerReference':
self.caller_reference = value
elif name == 'DefaultRootObject':
self.default_root_object = value
else:
setattr(self, name, value)
class StreamingDistributionConfig(DistributionConfig):
def __init__(self, connection=None, origin='', enabled=False,
caller_reference='', cnames=None, comment='',
trusted_signers=None, logging=None):
DistributionConfig.__init__(self, connection=connection,
origin=origin, enabled=enabled,
caller_reference=caller_reference,
cnames=cnames, comment=comment,
trusted_signers=trusted_signers,
logging=logging)
def to_xml(self):
s = '<?xml version="1.0" encoding="UTF-8"?>\n'
s += '<StreamingDistributionConfig xmlns="http://cloudfront.amazonaws.com/doc/2010-07-15/">\n'
if self.origin:
s += self.origin.to_xml()
s += ' <CallerReference>%s</CallerReference>\n' % self.caller_reference
for cname in self.cnames:
s += ' <CNAME>%s</CNAME>\n' % cname
if self.comment:
s += ' <Comment>%s</Comment>\n' % self.comment
s += ' <Enabled>'
if self.enabled:
s += 'true'
else:
s += 'false'
s += '</Enabled>\n'
if self.trusted_signers:
s += '<TrustedSigners>\n'
for signer in self.trusted_signers:
if signer == 'Self':
s += ' <Self/>\n'
else:
s += ' <AwsAccountNumber>%s</AwsAccountNumber>\n' % signer
s += '</TrustedSigners>\n'
if self.logging:
s += '<Logging>\n'
s += ' <Bucket>%s</Bucket>\n' % self.logging.bucket
s += ' <Prefix>%s</Prefix>\n' % self.logging.prefix
s += '</Logging>\n'
s += '</StreamingDistributionConfig>\n'
return s
class DistributionSummary(object):
def __init__(self, connection=None, domain_name='', id='',
last_modified_time=None, status='', origin=None,
cname='', comment='', enabled=False):
self.connection = connection
self.domain_name = domain_name
self.id = id
self.last_modified_time = last_modified_time
self.status = status
self.origin = origin
self.enabled = enabled
self.cnames = []
if cname:
self.cnames.append(cname)
self.comment = comment
self.trusted_signers = None
self.etag = None
self.streaming = False
def startElement(self, name, attrs, connection):
if name == 'TrustedSigners':
self.trusted_signers = TrustedSigners()
return self.trusted_signers
elif name == 'S3Origin':
self.origin = S3Origin()
return self.origin
elif name == 'CustomOrigin':
self.origin = CustomOrigin()
return self.origin
return None
def endElement(self, name, value, connection):
if name == 'Id':
self.id = value
elif name == 'Status':
self.status = value
elif name == 'LastModifiedTime':
self.last_modified_time = value
elif name == 'DomainName':
self.domain_name = value
elif name == 'Origin':
self.origin = value
elif name == 'CNAME':
self.cnames.append(value)
elif name == 'Comment':
self.comment = value
elif name == 'Enabled':
if value.lower() == 'true':
self.enabled = True
else:
self.enabled = False
elif name == 'StreamingDistributionSummary':
self.streaming = True
else:
setattr(self, name, value)
def get_distribution(self):
return self.connection.get_distribution_info(self.id)
class StreamingDistributionSummary(DistributionSummary):
def get_distribution(self):
return self.connection.get_streaming_distribution_info(self.id)
class Distribution(object):
def __init__(self, connection=None, config=None, domain_name='',
id='', last_modified_time=None, status=''):
self.connection = connection
self.config = config
self.domain_name = domain_name
self.id = id
self.last_modified_time = last_modified_time
self.status = status
self.in_progress_invalidation_batches = 0
self.active_signers = None
self.etag = None
self._bucket = None
self._object_class = Object
def startElement(self, name, attrs, connection):
if name == 'DistributionConfig':
self.config = DistributionConfig()
return self.config
elif name == 'ActiveTrustedSigners':
self.active_signers = ActiveTrustedSigners()
return self.active_signers
else:
return None
def endElement(self, name, value, connection):
if name == 'Id':
self.id = value
elif name == 'LastModifiedTime':
self.last_modified_time = value
elif name == 'Status':
self.status = value
elif name == 'InProgressInvalidationBatches':
self.in_progress_invalidation_batches = int(value)
elif name == 'DomainName':
self.domain_name = value
else:
setattr(self, name, value)
def update(self, enabled=None, cnames=None, comment=None):
"""
Update the configuration of the Distribution. The only values
of the DistributionConfig that can be directly updated are:
* CNAMES
* Comment
* Whether the Distribution is enabled or not
Any changes to the ``trusted_signers`` or ``origin`` properties of
this distribution's current config object will also be included in
the update. Therefore, to set the origin access identity for this
distribution, set ``Distribution.config.origin.origin_access_identity``
before calling this update method.
:type enabled: bool
:param enabled: Whether the Distribution is active or not.
:type cnames: list of str
:param cnames: The DNS CNAME's associated with this
Distribution. Maximum of 10 values.
:type comment: str or unicode
:param comment: The comment associated with the Distribution.
"""
new_config = DistributionConfig(self.connection, self.config.origin,
self.config.enabled, self.config.caller_reference,
self.config.cnames, self.config.comment,
self.config.trusted_signers,
self.config.default_root_object)
if enabled != None:
new_config.enabled = enabled
if cnames != None:
new_config.cnames = cnames
if comment != None:
new_config.comment = comment
self.etag = self.connection.set_distribution_config(self.id, self.etag, new_config)
self.config = new_config
self._object_class = Object
def enable(self):
"""
Activate the Distribution. A convenience wrapper around
the update method.
"""
self.update(enabled=True)
def disable(self):
"""
Deactivate the Distribution. A convenience wrapper around
the update method.
"""
self.update(enabled=False)
def delete(self):
"""
Delete this CloudFront Distribution. The content
associated with the Distribution is not deleted from
the underlying Origin bucket in S3.
"""
self.connection.delete_distribution(self.id, self.etag)
def _get_bucket(self):
if isinstance(self.config.origin, S3Origin):
if not self._bucket:
bucket_dns_name = self.config.origin.dns_name
bucket_name = bucket_dns_name.replace('.s3.amazonaws.com', '')
from boto.s3.connection import S3Connection
s3 = S3Connection(self.connection.aws_access_key_id,
self.connection.aws_secret_access_key,
proxy=self.connection.proxy,
proxy_port=self.connection.proxy_port,
proxy_user=self.connection.proxy_user,
proxy_pass=self.connection.proxy_pass)
self._bucket = s3.get_bucket(bucket_name)
self._bucket.distribution = self
self._bucket.set_key_class(self._object_class)
return self._bucket
else:
raise NotImplementedError('Unable to get_objects on CustomOrigin')
def get_objects(self):
"""
Return a list of all content objects in this distribution.
:rtype: list of :class:`boto.cloudfront.object.Object`
:return: The content objects
"""
bucket = self._get_bucket()
objs = []
for key in bucket:
objs.append(key)
return objs
def set_permissions(self, object, replace=False):
"""
Sets the S3 ACL grants for the given object to the appropriate
value based on the type of Distribution. If the Distribution
is serving private content the ACL will be set to include the
Origin Access Identity associated with the Distribution. If
the Distribution is serving public content the content will
be set up with "public-read".
:type object: :class:`boto.cloudfront.object.Object`
:param enabled: The Object whose ACL is being set
:type replace: bool
:param replace: If False, the Origin Access Identity will be
appended to the existing ACL for the object.
If True, the ACL for the object will be
completely replaced with one that grants
READ permission to the Origin Access Identity.
"""
if isinstance(self.config.origin, S3Origin):
if self.config.origin.origin_access_identity:
id = self.config.origin.origin_access_identity.split('/')[-1]
oai = self.connection.get_origin_access_identity_info(id)
policy = object.get_acl()
if replace:
policy.acl = ACL()
policy.acl.add_user_grant('READ', oai.s3_user_id)
object.set_acl(policy)
else:
object.set_canned_acl('public-read')
def set_permissions_all(self, replace=False):
"""
Sets the S3 ACL grants for all objects in the Distribution
to the appropriate value based on the type of Distribution.
:type replace: bool
:param replace: If False, the Origin Access Identity will be
appended to the existing ACL for the object.
If True, the ACL for the object will be
completely replaced with one that grants
READ permission to the Origin Access Identity.
"""
bucket = self._get_bucket()
for key in bucket:
self.set_permissions(key, replace)
def add_object(self, name, content, headers=None, replace=True):
"""
Adds a new content object to the Distribution. The content
for the object will be copied to a new Key in the S3 Bucket
and the permissions will be set appropriately for the type
of Distribution.
:type name: str or unicode
:param name: The name or key of the new object.
:type content: file-like object
:param content: A file-like object that contains the content
for the new object.
:type headers: dict
:param headers: A dictionary containing additional headers
you would like associated with the new
object in S3.
:rtype: :class:`boto.cloudfront.object.Object`
:return: The newly created object.
"""
if self.config.origin.origin_access_identity:
policy = 'private'
else:
policy = 'public-read'
bucket = self._get_bucket()
object = bucket.new_key(name)
object.set_contents_from_file(content, headers=headers, policy=policy)
if self.config.origin.origin_access_identity:
self.set_permissions(object, replace)
return object
def create_signed_url(self, url, keypair_id,
expire_time=None, valid_after_time=None,
ip_address=None, policy_url=None,
private_key_file=None, private_key_string=None):
"""
Creates a signed CloudFront URL that is only valid within the specified
parameters.
:type url: str
:param url: The URL of the protected object.
:type keypair_id: str
:param keypair_id: The keypair ID of the Amazon KeyPair used to sign
theURL. This ID MUST correspond to the private key
specified with private_key_file or private_key_string.
:type expire_time: int
:param expire_time: The expiry time of the URL. If provided, the URL
will expire after the time has passed. If not provided the URL will
never expire. Format is a unix epoch.
Use time.time() + duration_in_sec.
:type valid_after_time: int
:param valid_after_time: If provided, the URL will not be valid until
after valid_after_time. Format is a unix epoch.
Use time.time() + secs_until_valid.
:type ip_address: str
:param ip_address: If provided, only allows access from the specified
IP address. Use '192.168.0.10' for a single IP or
use '192.168.0.0/24' CIDR notation for a subnet.
:type policy_url: str
:param policy_url: If provided, allows the signature to contain
wildcard globs in the URL. For example, you could
provide: 'http://example.com/media/\*' and the policy
and signature would allow access to all contents of
the media subdirectory. If not specified, only
allow access to the exact url provided in 'url'.
:type private_key_file: str or file object.
:param private_key_file: If provided, contains the filename of the
private key file used for signing or an open
file object containing the private key
contents. Only one of private_key_file or
private_key_string can be provided.
:type private_key_string: str
:param private_key_string: If provided, contains the private key string
used for signing. Only one of private_key_file or
private_key_string can be provided.
:rtype: str
:return: The signed URL.
"""
# Get the required parameters
params = self._create_signing_params(
url=url, keypair_id=keypair_id, expire_time=expire_time,
valid_after_time=valid_after_time, ip_address=ip_address,
policy_url=policy_url, private_key_file=private_key_file,
private_key_string=private_key_string)
#combine these into a full url
if "?" in url:
sep = "&"
else:
sep = "?"
signed_url_params = []
for key in ["Expires", "Policy", "Signature", "Key-Pair-Id"]:
if key in params:
param = "%s=%s" % (key, params[key])
signed_url_params.append(param)
signed_url = url + sep + "&".join(signed_url_params)
return signed_url
def _create_signing_params(self, url, keypair_id,
expire_time=None, valid_after_time=None,
ip_address=None, policy_url=None,
private_key_file=None, private_key_string=None):
"""
Creates the required URL parameters for a signed URL.
"""
params = {}
# Check if we can use a canned policy
if expire_time and not valid_after_time and not ip_address and not policy_url:
# we manually construct this policy string to ensure formatting
# matches signature
policy = self._canned_policy(url, expire_time)
params["Expires"] = str(expire_time)
else:
# If no policy_url is specified, default to the full url.
if policy_url is None:
policy_url = url
# Can't use canned policy
policy = self._custom_policy(policy_url, expires=expire_time,
valid_after=valid_after_time,
ip_address=ip_address)
encoded_policy = self._url_base64_encode(policy)
params["Policy"] = encoded_policy
#sign the policy
signature = self._sign_string(policy, private_key_file, private_key_string)
#now base64 encode the signature (URL safe as well)
encoded_signature = self._url_base64_encode(signature)
params["Signature"] = encoded_signature
params["Key-Pair-Id"] = keypair_id
return params
@staticmethod
def _canned_policy(resource, expires):
"""
Creates a canned policy string.
"""
policy = ('{"Statement":[{"Resource":"%(resource)s",'
'"Condition":{"DateLessThan":{"AWS:EpochTime":'
'%(expires)s}}}]}' % locals())
return policy
@staticmethod
def _custom_policy(resource, expires=None, valid_after=None, ip_address=None):
"""
Creates a custom policy string based on the supplied parameters.
"""
condition = {}
# SEE: http://docs.amazonwebservices.com/AmazonCloudFront/latest/DeveloperGuide/RestrictingAccessPrivateContent.html#CustomPolicy
# The 'DateLessThan' property is required.
if not expires:
# Defaults to ONE day
expires = int(time.time()) + 86400
condition["DateLessThan"] = {"AWS:EpochTime": expires}
if valid_after:
condition["DateGreaterThan"] = {"AWS:EpochTime": valid_after}
if ip_address:
if '/' not in ip_address:
ip_address += "/32"
condition["IpAddress"] = {"AWS:SourceIp": ip_address}
policy = {"Statement": [{
"Resource": resource,
"Condition": condition}]}
return json.dumps(policy, separators=(",", ":"))
@staticmethod
def _sign_string(message, private_key_file=None, private_key_string=None):
"""
Signs a string for use with Amazon CloudFront.
Requires the rsa library be installed.
"""
try:
import rsa
except ImportError:
raise NotImplementedError("Boto depends on the python rsa "
"library to generate signed URLs for "
"CloudFront")
# Make sure only one of private_key_file and private_key_string is set
if private_key_file and private_key_string:
raise ValueError("Only specify the private_key_file or the private_key_string not both")
if not private_key_file and not private_key_string:
raise ValueError("You must specify one of private_key_file or private_key_string")
# If private_key_file is a file name, open it and read it
if private_key_string is None:
if isinstance(private_key_file, basestring):
with open(private_key_file, 'r') as file_handle:
private_key_string = file_handle.read()
# Otherwise, treat it like a file
else:
private_key_string = private_key_file.read()
# Sign it!
private_key = rsa.PrivateKey.load_pkcs1(private_key_string)
signature = rsa.sign(str(message), private_key, 'SHA-1')
return signature
@staticmethod
def _url_base64_encode(msg):
"""
Base64 encodes a string using the URL-safe characters specified by
Amazon.
"""
msg_base64 = base64.b64encode(msg)
msg_base64 = msg_base64.replace('+', '-')
msg_base64 = msg_base64.replace('=', '_')
msg_base64 = msg_base64.replace('/', '~')
return msg_base64
class StreamingDistribution(Distribution):
def __init__(self, connection=None, config=None, domain_name='',
id='', last_modified_time=None, status=''):
Distribution.__init__(self, connection, config, domain_name,
id, last_modified_time, status)
self._object_class = StreamingObject
def startElement(self, name, attrs, connection):
if name == 'StreamingDistributionConfig':
self.config = StreamingDistributionConfig()
return self.config
else:
return Distribution.startElement(self, name, attrs, connection)
def update(self, enabled=None, cnames=None, comment=None):
"""
Update the configuration of the StreamingDistribution. The only values
of the StreamingDistributionConfig that can be directly updated are:
* CNAMES
* Comment
* Whether the Distribution is enabled or not
Any changes to the ``trusted_signers`` or ``origin`` properties of
this distribution's current config object will also be included in
the update. Therefore, to set the origin access identity for this
distribution, set
``StreamingDistribution.config.origin.origin_access_identity``
before calling this update method.
:type enabled: bool
:param enabled: Whether the StreamingDistribution is active or not.
:type cnames: list of str
:param cnames: The DNS CNAME's associated with this
Distribution. Maximum of 10 values.
:type comment: str or unicode
:param comment: The comment associated with the Distribution.
"""
new_config = StreamingDistributionConfig(self.connection,
self.config.origin,
self.config.enabled,
self.config.caller_reference,
self.config.cnames,
self.config.comment,
self.config.trusted_signers)
if enabled != None:
new_config.enabled = enabled
if cnames != None:
new_config.cnames = cnames
if comment != None:
new_config.comment = comment
self.etag = self.connection.set_streaming_distribution_config(self.id,
self.etag,
new_config)
self.config = new_config
self._object_class = StreamingObject
def delete(self):
self.connection.delete_streaming_distribution(self.id, self.etag)
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