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S3.py
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# -*- coding: utf-8 -*-
## Amazon S3 manager
## Author: Michal Ludvig <[email protected]>
## http://www.logix.cz/michal
## License: GPL Version 2
## Copyright: TGRMN Software and contributors
from __future__ import absolute_import, division
import codecs
import sys
import os
import time
import errno
import mimetypes
import io
import pprint
from xml.sax import saxutils
from socket import timeout as SocketTimeoutException
from logging import debug, info, warning, error
from stat import ST_SIZE
try:
# python 3 support
from urlparse import urlparse
except ImportError:
from urllib.parse import urlparse
try:
# Python 2 support
from base64 import encodestring
except ImportError:
# Python 3.9.0+ support
from base64 import encodebytes as encodestring
import select
try:
from hashlib import md5
except ImportError:
from md5 import md5
from .BaseUtils import (getListFromXml, getTextFromXml, getRootTagName,
decode_from_s3, encode_to_s3, s3_quote)
from .Utils import (convertHeaderTupleListToDict, hash_file_md5, unicodise,
deunicodise, check_bucket_name,
check_bucket_name_dns_support, getHostnameFromBucket,
calculateChecksum)
from .SortedDict import SortedDict
from .AccessLog import AccessLog
from .ACL import ACL, GranteeLogDelivery
from .BidirMap import BidirMap
from .Config import Config
from .Exceptions import *
from .MultiPart import MultiPartUpload
from .S3Uri import S3Uri
from .ConnMan import ConnMan
from .Crypto import (sign_request_v2, sign_request_v4, checksum_sha256_file,
checksum_sha256_buffer, format_param_str)
try:
from ctypes import ArgumentError
import magic
try:
## https://github.com/ahupp/python-magic
## Always expect unicode for python 2
## (has Magic class but no "open()" function)
magic_ = magic.Magic(mime=True)
def mime_magic_file(file):
return magic_.from_file(file)
except TypeError:
try:
## file-5.11 built-in python bindings
## Sources: http://www.darwinsys.com/file/
## Expects unicode since version 5.19, encoded strings before
## we can't tell if a given copy of the magic library will take a
## filesystem-encoded string or a unicode value, so try first
## with the unicode, then with the encoded string.
## (has Magic class and "open()" function)
magic_ = magic.open(magic.MAGIC_MIME)
magic_.load()
def mime_magic_file(file):
try:
return magic_.file(file)
except (UnicodeDecodeError, UnicodeEncodeError, ArgumentError):
return magic_.file(deunicodise(file))
except AttributeError:
## http://pypi.python.org/pypi/filemagic
## Accept gracefully both unicode and encoded
## (has Magic class but not "mime" argument and no "open()" function )
magic_ = magic.Magic(flags=magic.MAGIC_MIME)
def mime_magic_file(file):
return magic_.id_filename(file)
except AttributeError:
## Older python-magic versions doesn't have a "Magic" method
## Only except encoded strings
## (has no Magic class but "open()" function)
magic_ = magic.open(magic.MAGIC_MIME)
magic_.load()
def mime_magic_file(file):
return magic_.file(deunicodise(file))
except (ImportError, OSError) as e:
error_str = str(e)
if 'magic' in error_str:
magic_message = "Module python-magic is not available."
else:
magic_message = "Module python-magic can't be used (%s)." % error_str
magic_message += " Guessing MIME types based on file extensions."
magic_warned = False
def mime_magic_file(file):
global magic_warned
if (not magic_warned):
warning(magic_message)
magic_warned = True
return mimetypes.guess_type(file)[0]
def mime_magic(file):
## NOTE: So far in the code, "file" var is already unicode
def _mime_magic(file):
magictype = mime_magic_file(file)
return magictype
result = _mime_magic(file)
if result is not None:
if isinstance(result, str):
if ';' in result:
mimetype, charset = result.split(';')
charset = charset[len('charset'):]
result = (mimetype, charset)
else:
result = (result, None)
if result is None:
result = (None, None)
return result
EXPECT_CONTINUE_TIMEOUT = 2
SIZE_1MB = 1024 * 1024
__all__ = []
class S3Request(object):
region_map = {}
## S3 sometimes sends HTTP-301, HTTP-307 response
redir_map = {}
def __init__(self, s3, method_string, resource, headers, body, params = None):
self.s3 = s3
self.headers = SortedDict(headers or {}, ignore_case = True)
if len(self.s3.config.access_token)>0:
self.s3.config.role_refresh()
self.headers['x-amz-security-token']=self.s3.config.access_token
self.resource = resource
self.method_string = method_string
self.params = params or {}
self.body = body
self.requester_pays()
def requester_pays(self):
if self.s3.config.requester_pays and self.method_string in ("GET", "POST", "PUT", "HEAD"):
self.headers['x-amz-request-payer'] = 'requester'
def update_timestamp(self):
if "date" in self.headers:
del(self.headers["date"])
self.headers["x-amz-date"] = time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime())
def use_signature_v2(self):
if self.s3.endpoint_requires_signature_v4:
return False
if self.s3.config.signature_v2 or self.s3.fallback_to_signature_v2:
return True
return False
def sign(self):
bucket_name = self.resource.get('bucket')
if self.use_signature_v2():
debug("Using signature v2")
if bucket_name:
resource_uri = "/%s%s" % (bucket_name, self.resource['uri'])
else:
resource_uri = self.resource['uri']
self.headers = sign_request_v2(self.method_string, resource_uri, self.params, self.headers)
else:
debug("Using signature v4")
hostname = self.s3.get_hostname(self.resource['bucket'])
## Default to bucket part of DNS.
## If bucket is not part of DNS assume path style to complete the request.
## Like for format_uri, take care that redirection could be to base path
if bucket_name and (
(bucket_name in S3Request.redir_map
and not S3Request.redir_map.get(bucket_name, '').startswith("%s."% bucket_name))
or (bucket_name not in S3Request.redir_map
and not check_bucket_name_dns_support(Config().host_bucket, bucket_name))
):
resource_uri = "/%s%s" % (bucket_name, self.resource['uri'])
else:
resource_uri = self.resource['uri']
bucket_region = S3Request.region_map.get(self.resource['bucket'], Config().bucket_location)
## Sign the data.
self.headers = sign_request_v4(self.method_string, hostname, resource_uri, self.params,
bucket_region, self.headers, self.body)
def get_triplet(self):
self.update_timestamp()
self.sign()
resource = dict(self.resource) ## take a copy
# URL Encode the uri for the http request
resource['uri'] = s3_quote(resource['uri'], quote_backslashes=False, unicode_output=True)
# Get the final uri by adding the uri parameters
resource['uri'] += format_param_str(self.params)
return (self.method_string, resource, self.headers)
class S3(object):
http_methods = BidirMap(
GET = 0x01,
PUT = 0x02,
HEAD = 0x04,
DELETE = 0x08,
POST = 0x10,
MASK = 0x1F,
)
targets = BidirMap(
SERVICE = 0x0100,
BUCKET = 0x0200,
OBJECT = 0x0400,
BATCH = 0x0800,
MASK = 0x0700,
)
operations = BidirMap(
UNDFINED = 0x0000,
LIST_ALL_BUCKETS = targets["SERVICE"] | http_methods["GET"],
BUCKET_CREATE = targets["BUCKET"] | http_methods["PUT"],
BUCKET_LIST = targets["BUCKET"] | http_methods["GET"],
BUCKET_DELETE = targets["BUCKET"] | http_methods["DELETE"],
OBJECT_PUT = targets["OBJECT"] | http_methods["PUT"],
OBJECT_GET = targets["OBJECT"] | http_methods["GET"],
OBJECT_HEAD = targets["OBJECT"] | http_methods["HEAD"],
OBJECT_DELETE = targets["OBJECT"] | http_methods["DELETE"],
OBJECT_POST = targets["OBJECT"] | http_methods["POST"],
BATCH_DELETE = targets["BATCH"] | http_methods["POST"],
)
codes = {
"NoSuchBucket" : "Bucket '%s' does not exist",
"AccessDenied" : "Access to bucket '%s' was denied",
"BucketAlreadyExists" : "Bucket '%s' already exists",
}
## Maximum attempts of re-issuing failed requests
_max_retries = 5
def __init__(self, config):
self.config = config
self.fallback_to_signature_v2 = False
self.endpoint_requires_signature_v4 = False
self.expect_continue_not_supported = False
def storage_class(self):
# Note - you cannot specify GLACIER here
# https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html
cls = 'STANDARD'
if self.config.storage_class != "":
return self.config.storage_class
if self.config.reduced_redundancy:
cls = 'REDUCED_REDUNDANCY'
return cls
def get_hostname(self, bucket):
if bucket and bucket in S3Request.redir_map:
host = S3Request.redir_map[bucket]
elif bucket and check_bucket_name_dns_support(self.config.host_bucket, bucket):
host = getHostnameFromBucket(bucket)
else:
host = self.config.host_base.lower()
# The following hack is needed because it looks like that some servers
# are not respecting the HTTP spec and so will fail the signature check
# if the port is specified in the "Host" header for default ports.
# STUPIDIEST THING EVER FOR A SERVER...
# See: https://github.com/minio/minio/issues/9169
if self.config.use_https:
if host.endswith(':443'):
host = host[:-4]
elif host.endswith(':80'):
host = host[:-3]
debug('get_hostname(%s): %s' % (bucket, host))
return host
def set_hostname(self, bucket, redir_hostname):
S3Request.redir_map[bucket] = redir_hostname.lower()
def format_uri(self, resource, base_path=None):
bucket_name = resource.get('bucket')
if bucket_name and (
(bucket_name in S3Request.redir_map
and not S3Request.redir_map.get(bucket_name, '').startswith("%s."% bucket_name))
or (bucket_name not in S3Request.redir_map
and not check_bucket_name_dns_support(self.config.host_bucket, bucket_name))
):
uri = "/%s%s" % (s3_quote(bucket_name, quote_backslashes=False,
unicode_output=True),
resource['uri'])
else:
uri = resource['uri']
if base_path:
uri = "%s%s" % (base_path, uri)
if self.config.proxy_host != "" and not self.config.use_https:
uri = "http://%s%s" % (self.get_hostname(bucket_name), uri)
debug('format_uri(): ' + uri)
return uri
## Commands / Actions
def list_all_buckets(self):
request = self.create_request("LIST_ALL_BUCKETS")
response = self.send_request(request)
response["list"] = getListFromXml(response["data"], "Bucket")
return response
def bucket_list(self, bucket, prefix = None, recursive = None, uri_params = None, limit = -1):
item_list = []
prefixes = []
for truncated, dirs, objects in self.bucket_list_streaming(bucket, prefix, recursive, uri_params, limit):
item_list.extend(objects)
prefixes.extend(dirs)
response = {}
response['list'] = item_list
response['common_prefixes'] = prefixes
response['truncated'] = truncated
return response
def bucket_list_streaming(self, bucket, prefix = None, recursive = None, uri_params = None, limit = -1):
""" Generator that produces <dir_list>, <object_list> pairs of groups of content of a specified bucket. """
def _list_truncated(data):
## <IsTruncated> can either be "true" or "false" or be missing completely
is_truncated = getTextFromXml(data, ".//IsTruncated") or "false"
return is_truncated.lower() != "false"
def _get_contents(data):
return getListFromXml(data, "Contents")
def _get_common_prefixes(data):
return getListFromXml(data, "CommonPrefixes")
def _get_next_marker(data, current_list):
return getTextFromXml(response["data"], "NextMarker") or current_list[-1]["Key"]
uri_params = uri_params and uri_params.copy() or {}
truncated = True
prefixes = []
num_objects = 0
num_prefixes = 0
max_keys = limit
while truncated:
response = self.bucket_list_noparse(bucket, prefix, recursive,
uri_params, max_keys)
current_list = _get_contents(response["data"])
current_prefixes = _get_common_prefixes(response["data"])
num_objects += len(current_list)
num_prefixes += len(current_prefixes)
if limit > num_objects + num_prefixes:
max_keys = limit - (num_objects + num_prefixes)
truncated = _list_truncated(response["data"])
if truncated:
if limit == -1 or num_objects + num_prefixes < limit:
if current_list:
uri_params['marker'] = \
_get_next_marker(response["data"], current_list)
elif current_prefixes:
uri_params['marker'] = current_prefixes[-1]["Prefix"]
else:
# Unexpectedly, the server lied, and so the previous
# response was not truncated. So, no new key to get.
yield False, current_prefixes, current_list
break
debug("Listing continues after '%s'" % uri_params['marker'])
else:
yield truncated, current_prefixes, current_list
break
yield truncated, current_prefixes, current_list
def bucket_list_noparse(self, bucket, prefix = None, recursive = None, uri_params = None, max_keys = -1):
if uri_params is None:
uri_params = {}
if prefix:
uri_params['prefix'] = prefix
if not self.config.recursive and not recursive:
uri_params['delimiter'] = "/"
if max_keys != -1:
uri_params['max-keys'] = str(max_keys)
if self.config.list_allow_unordered:
uri_params['allow-unordered'] = "true"
request = self.create_request("BUCKET_LIST", bucket = bucket, uri_params = uri_params)
response = self.send_request(request)
#debug(response)
return response
def bucket_create(self, bucket, bucket_location = None, extra_headers = None):
headers = SortedDict(ignore_case = True)
if extra_headers:
headers.update(extra_headers)
body = ""
if bucket_location and bucket_location.strip().upper() != "US" and bucket_location.strip().lower() != "us-east-1":
bucket_location = bucket_location.strip()
if bucket_location.upper() == "EU":
bucket_location = bucket_location.upper()
body = "<CreateBucketConfiguration><LocationConstraint>"
body += bucket_location
body += "</LocationConstraint></CreateBucketConfiguration>"
debug("bucket_location: " + body)
check_bucket_name(bucket, dns_strict = True)
else:
check_bucket_name(bucket, dns_strict = False)
if self.config.acl_public:
headers["x-amz-acl"] = "public-read"
request = self.create_request("BUCKET_CREATE", bucket = bucket, headers = headers, body = body)
response = self.send_request(request)
return response
def bucket_delete(self, bucket):
request = self.create_request("BUCKET_DELETE", bucket = bucket)
response = self.send_request(request)
return response
def get_bucket_location(self, uri, force_us_default=False):
bucket = uri.bucket()
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'location': None})
saved_redir_map = S3Request.redir_map.get(bucket, '')
saved_region_map = S3Request.region_map.get(bucket, '')
try:
if force_us_default and not (saved_redir_map and saved_region_map):
S3Request.redir_map[bucket] = self.config.host_base
S3Request.region_map[bucket] = 'us-east-1'
response = self.send_request(request)
finally:
if bucket in saved_redir_map:
S3Request.redir_map[bucket] = saved_redir_map
elif bucket in S3Request.redir_map:
del S3Request.redir_map[bucket]
if bucket in saved_region_map:
S3Request.region_map[bucket] = saved_region_map
elif bucket in S3Request.region_map:
del S3Request.region_map[bucket]
location = getTextFromXml(response['data'], "LocationConstraint")
if not location or location in [ "", "US" ]:
location = "us-east-1"
elif location == "EU":
location = "eu-west-1"
return location
def get_bucket_requester_pays(self, uri):
request = self.create_request("BUCKET_LIST", bucket=uri.bucket(),
uri_params={'requestPayment': None})
response = self.send_request(request)
resp_data = response.get('data', '')
if resp_data:
payer = getTextFromXml(response['data'], "Payer")
else:
payer = None
return payer
def bucket_info(self, uri):
response = {}
response['bucket-location'] = self.get_bucket_location(uri)
try:
response['requester-pays'] = self.get_bucket_requester_pays(uri)
except S3Error as e:
response['requester-pays'] = None
return response
def website_info(self, uri, bucket_location = None):
bucket = uri.bucket()
request = self.create_request("BUCKET_LIST", bucket = bucket,
uri_params = {'website': None})
try:
response = self.send_request(request)
response['index_document'] = getTextFromXml(response['data'], ".//IndexDocument//Suffix")
response['error_document'] = getTextFromXml(response['data'], ".//ErrorDocument//Key")
response['website_endpoint'] = self.config.website_endpoint % {
"bucket" : uri.bucket(),
"location" : self.get_bucket_location(uri)}
return response
except S3Error as e:
if e.status == 404:
debug("Could not get /?website - website probably not configured for this bucket")
return None
raise
def website_create(self, uri, bucket_location = None):
bucket = uri.bucket()
body = '<WebsiteConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">'
body += ' <IndexDocument>'
body += (' <Suffix>%s</Suffix>' % self.config.website_index)
body += ' </IndexDocument>'
if self.config.website_error:
body += ' <ErrorDocument>'
body += (' <Key>%s</Key>' % self.config.website_error)
body += ' </ErrorDocument>'
body += '</WebsiteConfiguration>'
request = self.create_request("BUCKET_CREATE", bucket = bucket, body = body,
uri_params = {'website': None})
response = self.send_request(request)
debug("Received response '%s'" % (response))
return response
def website_delete(self, uri, bucket_location = None):
bucket = uri.bucket()
request = self.create_request("BUCKET_DELETE", bucket = bucket,
uri_params = {'website': None})
response = self.send_request(request)
debug("Received response '%s'" % (response))
if response['status'] != 204:
raise S3ResponseError("Expected status 204: %s" % response)
return response
def expiration_info(self, uri, bucket_location = None):
bucket = uri.bucket()
request = self.create_request("BUCKET_LIST", bucket=bucket,
uri_params={'lifecycle': None})
try:
response = self.send_request(request)
except S3Error as e:
if e.status == 404:
debug("Could not get /?lifecycle - lifecycle probably not "
"configured for this bucket")
return None
elif e.status == 501:
debug("Could not get /?lifecycle - lifecycle support not "
"implemented by the server")
return None
raise
root_tag_name = getRootTagName(response['data'])
if root_tag_name != "LifecycleConfiguration":
debug("Could not get /?lifecycle - unexpected xml response: "
"%s", root_tag_name)
return None
response['prefix'] = getTextFromXml(response['data'],
".//Rule//Prefix")
response['date'] = getTextFromXml(response['data'],
".//Rule//Expiration//Date")
response['days'] = getTextFromXml(response['data'],
".//Rule//Expiration//Days")
return response
def expiration_set(self, uri, bucket_location = None):
if self.config.expiry_date and self.config.expiry_days:
raise ParameterError("Expect either --expiry-day or --expiry-date")
if not (self.config.expiry_date or self.config.expiry_days):
if self.config.expiry_prefix:
raise ParameterError("Expect either --expiry-day or --expiry-date")
debug("del bucket lifecycle")
bucket = uri.bucket()
request = self.create_request("BUCKET_DELETE", bucket = bucket,
uri_params = {'lifecycle': None})
else:
request = self._expiration_set(uri)
response = self.send_request(request)
debug("Received response '%s'" % (response))
return response
def _expiration_set(self, uri):
debug("put bucket lifecycle")
body = '<LifecycleConfiguration>'
body += ' <Rule>'
body += ' <Filter>'
body += ' <Prefix>%s</Prefix>' % self.config.expiry_prefix
body += ' </Filter>'
body += ' <Status>Enabled</Status>'
body += ' <Expiration>'
if self.config.expiry_date:
body += ' <Date>%s</Date>' % self.config.expiry_date
elif self.config.expiry_days:
body += ' <Days>%s</Days>' % self.config.expiry_days
body += ' </Expiration>'
body += ' </Rule>'
body += '</LifecycleConfiguration>'
headers = SortedDict(ignore_case = True)
headers['content-md5'] = compute_content_md5(body)
bucket = uri.bucket()
request = self.create_request("BUCKET_CREATE", bucket = bucket,
headers = headers, body = body,
uri_params = {'lifecycle': None})
return (request)
def _guess_content_type(self, filename):
content_type = self.config.default_mime_type
content_charset = None
if filename == "-" and not self.config.default_mime_type:
raise ParameterError("You must specify --mime-type or --default-mime-type for files uploaded from stdin.")
if self.config.guess_mime_type:
if self.config.follow_symlinks:
filename = unicodise(os.path.realpath(deunicodise(filename)))
if self.config.use_mime_magic:
(content_type, content_charset) = mime_magic(filename)
else:
(content_type, content_charset) = mimetypes.guess_type(filename)
if not content_type:
content_type = self.config.default_mime_type
return (content_type, content_charset)
def stdin_content_type(self):
content_type = self.config.mime_type
if not content_type:
content_type = self.config.default_mime_type
content_type += "; charset=" + self.config.encoding.upper()
return content_type
def content_type(self, filename=None):
# explicit command line argument always wins
content_type = self.config.mime_type
content_charset = None
if filename == u'-':
return self.stdin_content_type()
if not content_type:
(content_type, content_charset) = self._guess_content_type(filename)
## add charset to content type
if not content_charset:
content_charset = self.config.encoding.upper()
if self.add_encoding(filename, content_type) and content_charset is not None:
content_type = content_type + "; charset=" + content_charset
return content_type
def add_encoding(self, filename, content_type):
if 'charset=' in content_type:
return False
exts = self.config.add_encoding_exts.split(',')
if exts[0]=='':
return False
parts = filename.rsplit('.',2)
if len(parts) < 2:
return False
ext = parts[1]
if ext in exts:
return True
else:
return False
def object_put(self, filename, uri, extra_headers = None, extra_label = ""):
# TODO TODO
# Make it consistent with stream-oriented object_get()
if uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % uri.type)
if filename != "-" and not os.path.isfile(deunicodise(filename)):
raise InvalidFileError(u"Not a regular file")
try:
if filename == "-":
src_stream = io.open(sys.stdin.fileno(), mode='rb', closefd=False)
src_stream.stream_name = u'<stdin>'
size = 0
else:
src_stream = io.open(deunicodise(filename), mode='rb')
src_stream.stream_name = filename
size = os.stat(deunicodise(filename))[ST_SIZE]
except (IOError, OSError) as e:
raise InvalidFileError(u"%s" % e.strerror)
headers = SortedDict(ignore_case = True)
if extra_headers:
headers.update(extra_headers)
## Set server side encryption
if self.config.server_side_encryption:
headers["x-amz-server-side-encryption"] = "AES256"
## Set kms headers
if self.config.kms_key:
headers['x-amz-server-side-encryption'] = 'aws:kms'
headers['x-amz-server-side-encryption-aws-kms-key-id'] = self.config.kms_key
## MIME-type handling
headers["content-type"] = self.content_type(filename=filename)
## Other Amazon S3 attributes
if self.config.acl_public:
headers["x-amz-acl"] = "public-read"
headers["x-amz-storage-class"] = self.storage_class()
## Multipart decision
multipart = False
if not self.config.enable_multipart and filename == "-":
raise ParameterError("Multi-part upload is required to upload from stdin")
if self.config.enable_multipart:
if size > self.config.multipart_chunk_size_mb * SIZE_1MB or filename == "-":
multipart = True
if size > self.config.multipart_max_chunks * self.config.multipart_chunk_size_mb * SIZE_1MB:
raise ParameterError("Chunk size %d MB results in more than %d chunks. Please increase --multipart-chunk-size-mb" % \
(self.config.multipart_chunk_size_mb, self.config.multipart_max_chunks))
if multipart:
# Multipart requests are quite different... drop here
return self.send_file_multipart(src_stream, headers, uri, size, extra_label)
## Not multipart...
if self.config.put_continue:
# Note, if input was stdin, we would be performing multipart upload.
# So this will always work as long as the file already uploaded was
# not uploaded via MultiUpload, in which case its ETag will not be
# an md5.
try:
info = self.object_info(uri)
except Exception:
info = None
if info is not None:
remote_size = int(info['headers']['content-length'])
remote_checksum = info['headers']['etag'].strip('"\'')
if size == remote_size:
checksum = calculateChecksum('', src_stream, 0, size, self.config.send_chunk)
if remote_checksum == checksum:
warning("Put: size and md5sum match for %s, skipping." % uri)
return
else:
warning("MultiPart: checksum (%s vs %s) does not match for %s, reuploading."
% (remote_checksum, checksum, uri))
else:
warning("MultiPart: size (%d vs %d) does not match for %s, reuploading."
% (remote_size, size, uri))
headers["content-length"] = str(size)
request = self.create_request("OBJECT_PUT", uri = uri, headers = headers)
labels = { 'source' : filename, 'destination' : uri.uri(), 'extra' : extra_label }
response = self.send_file(request, src_stream, labels)
return response
def object_get(self, uri, stream, dest_name, start_position = 0, extra_label = ""):
if uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % uri.type)
request = self.create_request("OBJECT_GET", uri = uri)
labels = { 'source' : uri.uri(), 'destination' : dest_name, 'extra' : extra_label }
response = self.recv_file(request, stream, labels, start_position)
return response
def object_batch_delete(self, remote_list):
""" Batch delete given a remote_list """
uris = [remote_list[item]['object_uri_str'] for item in remote_list]
self.object_batch_delete_uri_strs(uris)
def object_batch_delete_uri_strs(self, uris):
""" Batch delete given a list of object uris """
def compose_batch_del_xml(bucket, key_list):
body = u"<?xml version=\"1.0\" encoding=\"UTF-8\"?><Delete>"
for key in key_list:
uri = S3Uri(key)
if uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % uri.type)
if not uri.has_object():
raise ValueError("URI '%s' has no object" % key)
if uri.bucket() != bucket:
raise ValueError("The batch should contain keys from the same bucket")
object = saxutils.escape(uri.object())
body += u"<Object><Key>%s</Key></Object>" % object
body += u"</Delete>"
body = encode_to_s3(body)
return body
batch = uris
if len(batch) == 0:
raise ValueError("Key list is empty")
bucket = S3Uri(batch[0]).bucket()
request_body = compose_batch_del_xml(bucket, batch)
headers = SortedDict({'content-md5': compute_content_md5(request_body),
'content-type': 'application/xml'}, ignore_case=True)
request = self.create_request("BATCH_DELETE", bucket = bucket,
headers = headers, body = request_body,
uri_params = {'delete': None})
response = self.send_request(request)
return response
def object_delete(self, uri):
if uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % uri.type)
request = self.create_request("OBJECT_DELETE", uri = uri)
response = self.send_request(request)
return response
def object_restore(self, uri):
if uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % uri.type)
if self.config.restore_days < 1:
raise ParameterError("You must restore a file for 1 or more days")
if self.config.restore_priority not in ['Standard', 'Expedited', 'Bulk']:
raise ParameterError("Valid restoration priorities: bulk, standard, expedited")
body = '<RestoreRequest xmlns="http://s3.amazonaws.com/doc/2006-03-01/">'
body += (' <Days>%s</Days>' % self.config.restore_days)
body += ' <GlacierJobParameters>'
body += (' <Tier>%s</Tier>' % self.config.restore_priority)
body += ' </GlacierJobParameters>'
body += '</RestoreRequest>'
request = self.create_request("OBJECT_POST", uri = uri, body = body,
uri_params = {'restore': None})
response = self.send_request(request)
debug("Received response '%s'" % (response))
return response
def _sanitize_headers(self, headers):
to_remove = [
# from http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMetadata.html
'date',
'content-length',
'last-modified',
'content-md5',
'x-amz-version-id',
'x-amz-delete-marker',
# other headers returned from object_info() we don't want to send
'accept-ranges',
'connection',
'etag',
'server',
'x-amz-id-2',
'x-amz-request-id',
# Other headers that are not copying by a direct copy
'x-amz-storage-class',
## We should probably also add server-side encryption headers
]
for h in to_remove + self.config.remove_headers:
if h.lower() in headers:
del headers[h.lower()]
return headers
def object_copy(self, src_uri, dst_uri, extra_headers=None,
src_size=None, extra_label="", replace_meta=False):
"""Remote copy an object and eventually set metadata
Note: A little memo description of the nightmare for performance here:
** FOR AWS, 2 cases:
- COPY will copy the metadata of the source to dest, but you can't
modify them. Any additional header will be ignored anyway.
- REPLACE will set the additional metadata headers that are provided
but will not copy any of the source headers.
So, to add to existing meta during copy, you have to do an object_info
to get original source headers, then modify, then use REPLACE for the
copy operation.
** For Minio and maybe other implementations:
- if additional headers are sent, they will be set to the destination
on top of source original meta in all cases COPY and REPLACE.
It is a nice behavior except that it is different of the aws one.
As it was still too easy, there is another catch:
In all cases, for multipart copies, metadata data are never copied
from the source.
"""
if src_uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % src_uri.type)
if dst_uri.type != "s3":
raise ValueError("Expected URI type 's3', got '%s'" % dst_uri.type)
if self.config.acl_public is None:
try:
acl = self.get_acl(src_uri)
except S3Error as exc:
# Ignore the exception and don't fail the copy
# if the server doesn't support setting ACLs
if exc.status != 501:
raise exc
acl = None
multipart = False
headers = None
if extra_headers or self.config.mime_type:
# Force replace, that will force getting meta with object_info()
replace_meta = True
if replace_meta:
src_info = self.object_info(src_uri)
headers = src_info['headers']
src_size = int(headers["content-length"])
if self.config.enable_multipart:
# Get size of remote source only if multipart is enabled and that no
# size info was provided
src_headers = headers
if src_size is None:
src_info = self.object_info(src_uri)
src_headers = src_info['headers']
src_size = int(src_headers["content-length"])
# If we are over the grand maximum size for a normal copy/modify
# (> 5GB) go nuclear and use multipart copy as the only option to
# modify an object.
# Reason is an aws s3 design bug. See:
# https://github.com/aws/aws-sdk-java/issues/367
if src_uri is dst_uri:
# optimisation in the case of modify
threshold = MultiPartUpload.MAX_CHUNK_SIZE_MB * SIZE_1MB
else:
threshold = self.config.multipart_copy_chunk_size_mb * SIZE_1MB
if src_size > threshold:
# Sadly, s3 has a bad logic as metadata will not be copied for
# multipart copy unlike what is done for direct copies.
# TODO: Optimize by re-using the object_info request done
# earlier earlier at fetch remote stage, and preserve headers.
if src_headers is None:
src_info = self.object_info(src_uri)
src_headers = src_info['headers']
src_size = int(src_headers["content-length"])
headers = src_headers
multipart = True
if headers:
self._sanitize_headers(headers)
headers = SortedDict(headers, ignore_case=True)
else:
headers = SortedDict(ignore_case=True)
# Following meta data are updated even in COPY by aws
if self.config.acl_public:
headers["x-amz-acl"] = "public-read"
headers["x-amz-storage-class"] = self.storage_class()
## Set server side encryption
if self.config.server_side_encryption:
headers["x-amz-server-side-encryption"] = "AES256"
## Set kms headers
if self.config.kms_key:
headers['x-amz-server-side-encryption'] = 'aws:kms'
headers['x-amz-server-side-encryption-aws-kms-key-id'] = \
self.config.kms_key
# Following meta data are not updated in simple COPY by aws.
if extra_headers:
headers.update(extra_headers)
if self.config.mime_type:
headers["content-type"] = self.config.mime_type
# "COPY" or "REPLACE"
if not replace_meta:
headers['x-amz-metadata-directive'] = "COPY"
else:
headers['x-amz-metadata-directive'] = "REPLACE"
if multipart:
# Multipart decision. Only do multipart copy for remote s3 files
# bigger than the multipart copy threshold.
# Multipart requests are quite different... delegate
response = self.copy_file_multipart(src_uri, dst_uri, src_size,
headers, extra_label)
else:
# Not multipart... direct request
headers['x-amz-copy-source'] = s3_quote(
"/%s/%s" % (src_uri.bucket(), src_uri.object()),
quote_backslashes=False, unicode_output=True)
request = self.create_request("OBJECT_PUT", uri=dst_uri,
headers=headers)
response = self.send_request(request)
if response["data"] and getRootTagName(response["data"]) == "Error":
# http://doc.s3.amazonaws.com/proposals/copy.html
# Error during copy, status will be 200, so force error code 500
response["status"] = 500
error("Server error during the COPY operation. Overwrite response "
"status to 500")
raise S3Error(response)
if self.config.acl_public is None and acl: