# -*- coding: utf-8 -*-
## Amazon S3 manager
## Author: Michal Ludvig <michal@logix.cz>
## http://www.logix.cz/michal
## License: GPL Version 2
## Copyright: TGRMN Software and contributors
from __future__ import absolute_import, division
import sys
import os
import time
import errno
import base64
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
import select
try:
from hashlib import md5
except ImportError:
from md5 import md5
from .Utils import *
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, s3_quote, 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
__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
# in case of bad DNS name due to bucket name v2 will be used
# this way we can still use capital letters in bucket names for the older regions
if self.resource['bucket'] is None or not check_bucket_name_dns_conformity(self.resource['bucket']) or 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()
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" % (bucket_name, 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)
else:
uri_params['marker'] = current_prefixes[-1]["Prefix"]
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)
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):
headers = SortedDict(ignore_case = True)
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()
else:
bucket_location = bucket_location.lower()
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)
payer = getTextFromXml(response['data'], "Payer")
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)
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
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
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 += (' <Prefix>%s</Prefix>' % self.config.expiry_prefix)
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 * 1024 * 1024 or filename == "-":
multipart = True
if size > self.config.multipart_max_chunks * self.config.multipart_chunk_size_mb * 1024 * 1024:
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:
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/2006-3-01">'
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',
]
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):
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
headers = SortedDict(ignore_case = True)
headers['x-amz-copy-source'] = "/%s/%s" % (src_uri.bucket(),
urlencode_string(src_uri.object(), unicode_output=True))
headers['x-amz-metadata-directive'] = "COPY"
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
if extra_headers:
headers.update(extra_headers)
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:
try:
self.set_acl(dst_uri, acl)
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
return response
def object_modify(self, src_uri, dst_uri, extra_headers = None):
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)
info_response = self.object_info(src_uri)
headers = info_response['headers']
headers = self._sanitize_headers(headers)
try:
acl = self.get_acl(src_uri)
except S3Error as exc:
# Ignore the exception and don't fail the modify
# if the server doesn't support setting ACLs
if exc.status != 501:
raise exc
acl = None
headers['x-amz-copy-source'] = "/%s/%s" % (src_uri.bucket(),
urlencode_string(src_uri.object(), unicode_output=True))
headers['x-amz-metadata-directive'] = "REPLACE"
# cannot change between standard and reduced redundancy with a REPLACE.
## 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
if extra_headers:
headers.update(extra_headers)
if self.config.mime_type:
headers["content-type"] = self.config.mime_type
request = self.create_request("OBJECT_PUT", uri = src_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 modify, status will be 200, so force error code 500
response["status"] = 500
error("Server error during the MODIFY operation. Overwrite response status to 500")
raise S3Error(response)
if acl != None:
try:
self.set_acl(src_uri, acl)
except S3Error as exc:
# Ignore the exception and don't fail the modify
# if the server doesn't support setting ACLs
if exc.status != 501:
raise exc
return response
def object_move(self, src_uri, dst_uri, extra_headers = None):
response_copy = self.object_copy(src_uri, dst_uri, extra_headers)
debug("Object %s copied to %s" % (src_uri, dst_uri))
if not response_copy["data"] or getRootTagName(response_copy["data"]) == "CopyObjectResult":
self.object_delete(src_uri)
debug("Object '%s' deleted", src_uri)
else:
debug("Object '%s' NOT deleted because of an unexepected response data content.", src_uri)
return response_copy
def object_info(self, uri):
request = self.create_request("OBJECT_HEAD", uri = uri)
response = self.send_request(request)
return response
def get_acl(self, uri):
if uri.has_object():
request = self.create_request("OBJECT_GET", uri = uri,
uri_params = {'acl': None})
else:
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'acl': None})
response = self.send_request(request)
acl = ACL(response['data'])
return acl
def set_acl(self, uri, acl):
# dreamhost doesn't support set_acl properly
if 'objects.dreamhost.com' in self.config.host_base:
return { 'status' : 501 } # not implemented
body = u"%s"% acl
debug(u"set_acl(%s): acl-xml: %s" % (uri, body))
headers = SortedDict({'content-type': 'application/xml'}, ignore_case = True)
if uri.has_object():
request = self.create_request("OBJECT_PUT", uri = uri,
headers = headers, body = body,
uri_params = {'acl': None})
else:
request = self.create_request("BUCKET_CREATE", bucket = uri.bucket(),
headers = headers, body = body,
uri_params = {'acl': None})
response = self.send_request(request)
return response
def get_policy(self, uri):
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'policy': None})
response = self.send_request(request)
return response['data']
def set_policy(self, uri, policy):
headers = SortedDict(ignore_case = True)
# TODO check policy is proper json string
headers['content-type'] = 'application/json'
request = self.create_request("BUCKET_CREATE", uri = uri,
headers=headers, body = policy,
uri_params = {'policy': None})
response = self.send_request(request)
return response
def delete_policy(self, uri):
request = self.create_request("BUCKET_DELETE", uri = uri,
uri_params = {'policy': None})
debug(u"delete_policy(%s)" % uri)
response = self.send_request(request)
return response
def get_cors(self, uri):
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'cors': None})
response = self.send_request(request)
return response['data']
def set_cors(self, uri, cors):
headers = SortedDict(ignore_case = True)
# TODO check cors is proper json string
headers['content-type'] = 'application/xml'
headers['content-md5'] = compute_content_md5(cors)
request = self.create_request("BUCKET_CREATE", uri = uri,
headers=headers, body = cors,
uri_params = {'cors': None})
response = self.send_request(request)
return response
def delete_cors(self, uri):
request = self.create_request("BUCKET_DELETE", uri = uri,
uri_params = {'cors': None})
debug(u"delete_cors(%s)" % uri)
response = self.send_request(request)
return response
def set_lifecycle_policy(self, uri, policy):
headers = SortedDict(ignore_case = True)
headers['content-md5'] = compute_content_md5(policy)
request = self.create_request("BUCKET_CREATE", uri = uri,
headers=headers, body = policy,
uri_params = {'lifecycle': None})
debug(u"set_lifecycle_policy(%s): policy-xml: %s" % (uri, policy))
response = self.send_request(request)
return response
def set_payer(self, uri):
headers = SortedDict(ignore_case = True)
headers['content-type'] = 'application/xml'
body = '<RequestPaymentConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">\n'
if self.config.requester_pays:
body += '<Payer>Requester</Payer>\n'
else:
body += '<Payer>BucketOwner</Payer>\n'
body += '</RequestPaymentConfiguration>\n'
request = self.create_request("BUCKET_CREATE", uri = uri, body = body,
uri_params = {'requestPayment': None})
response = self.send_request(request)
return response
def get_lifecycle_policy(self, uri):
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'lifecycle': None})
debug(u"get_lifecycle_policy(%s)" % uri)
response = self.send_request(request)
debug(u"%s: Got Lifecycle Policy" % response['status'])
return response
def delete_lifecycle_policy(self, uri):
request = self.create_request("BUCKET_DELETE", uri = uri,
uri_params = {'lifecycle': None})
debug(u"delete_lifecycle_policy(%s)" % uri)
response = self.send_request(request)
return response
def get_multipart(self, uri):
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'uploads': None})
response = self.send_request(request)
return response
def abort_multipart(self, uri, id):
request = self.create_request("OBJECT_DELETE", uri = uri,
uri_params = {'uploadId': id})
response = self.send_request(request)
return response
def list_multipart(self, uri, id):
request = self.create_request("OBJECT_GET", uri = uri,
uri_params = {'uploadId': id})
response = self.send_request(request)
return response
def get_accesslog(self, uri):
request = self.create_request("BUCKET_LIST", bucket = uri.bucket(),
uri_params = {'logging': None})
response = self.send_request(request)
accesslog = AccessLog(response['data'])
return accesslog
def set_accesslog_acl(self, uri):
acl = self.get_acl(uri)
debug("Current ACL(%s): %s" % (uri.uri(), acl))
acl.appendGrantee(GranteeLogDelivery("READ_ACP"))
acl.appendGrantee(GranteeLogDelivery("WRITE"))
debug("Updated ACL(%s): %s" % (uri.uri(), acl))
self.set_acl(uri, acl)
def set_accesslog(self, uri, enable, log_target_prefix_uri = None, acl_public = False):
accesslog = AccessLog()
if enable:
accesslog.enableLogging(log_target_prefix_uri)
accesslog.setAclPublic(acl_public)
else:
accesslog.disableLogging()
body = "%s" % accesslog
debug(u"set_accesslog(%s): accesslog-xml: %s" % (uri, body))
request = self.create_request("BUCKET_CREATE", bucket = uri.bucket(),
body = body, uri_params = {'logging': None})
try:
response = self.send_request(request)
except S3Error as e:
if e.info['Code'] == "InvalidTargetBucketForLogging":
info("Setting up log-delivery ACL for target bucket.")
self.set_accesslog_acl(S3Uri(u"s3://%s" % log_target_prefix_uri.bucket()))
response = self.send_request(request)
else:
raise
return accesslog, response
def create_request(self, operation, uri = None, bucket = None, object = None, headers = None, body = "", uri_params = None):
resource = { 'bucket' : None, 'uri' : "/" }
if uri and (bucket or object):
raise ValueError("Both 'uri' and either 'bucket' or 'object' parameters supplied")
## If URI is given use that instead of bucket/object parameters
if uri:
bucket = uri.bucket()
object = uri.has_object() and uri.object() or None
if bucket:
resource['bucket'] = bucket
if object:
resource['uri'] = "/" + object
method_string = S3.http_methods.getkey(S3.operations[operation] & S3.http_methods["MASK"])
request = S3Request(self, method_string, resource, headers, body, uri_params)
debug("CreateRequest: resource[uri]=%s", resource['uri'])
return request
def _fail_wait(self, retries):
# Wait a few seconds. The more it fails the more we wait.
return (self._max_retries - retries + 1) * 3
def _http_redirection_handler(self, request, response, fn, *args, **kwargs):
# Region info might already be available through the x-amz-bucket-region header
redir_region = response['headers'].get('x-amz-bucket-region')
if 'data' in response and len(response['data']) > 0:
redir_bucket = getTextFromXml(response['data'], ".//Bucket")
redir_hostname = getTextFromXml(response['data'], ".//Endpoint")
self.set_hostname(redir_bucket, redir_hostname)
info(u'Redirected to: %s', redir_hostname)
if redir_region:
S3Request.region_map[redir_bucket] = redir_region
info(u'Redirected to region: %s', redir_region)
return fn(*args, **kwargs)
elif request.method_string == 'HEAD':
# Head is a special case, redirection info usually are in the body
# but there is no body for an HEAD request.
location_url = response['headers'].get('location')
if location_url:
# Sometimes a "location" http header could be available and
# can help us deduce the redirection path.
# It is the case of "dns-style" syntax, but not for "path-style" syntax.
if location_url.startswith("http://"):
location_url = location_url[7:]
elif location_url.startswith("https://"):
location_url = location_url[8:]
location_url = urlparse('https://' + location_url).hostname
redir_bucket = request.resource['bucket']
self.set_hostname(redir_bucket, location_url)
info(u'Redirected to: %s', location_url)
if redir_region:
S3Request.region_map[redir_bucket] = redir_region
info(u'Redirected to region: %s', redir_region)
return fn(*args, **kwargs)
warning(u'Redirection error: No info provided by the server to where should be forwarded the request (HEAD request). (Hint target region: %s)', redir_region)
raise S3Error(response)
def _http_400_handler(self, request, response, fn, *args, **kwargs):
"""
Returns None if no handler available for the specific error code
"""
# AWS response AuthorizationHeaderMalformed means we sent the request to the wrong region
# get the right region out of the response and send it there.
if 'data' in response and len(response['data']) > 0:
failureCode = getTextFromXml(response['data'], 'Code')
if failureCode == 'AuthorizationHeaderMalformed':
# we sent the request to the wrong region
region = getTextFromXml(response['data'], 'Region')
if region is not None:
S3Request.region_map[request.resource['bucket']] = region
info('Forwarding request to %s', region)
return fn(*args, **kwargs)
else:
warning(u'Could not determine bucket the location. Please consider using the --region parameter.')
elif failureCode == 'InvalidRequest':
message = getTextFromXml(response['data'], 'Message')
if message == 'The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.':
debug(u'Endpoint requires signature v4')
self.endpoint_requires_signature_v4 = True
return fn(*args, **kwargs)
elif failureCode == 'InvalidArgument':
# returned by DreamObjects on send_request and send_file,
# which doesn't support signature v4. Retry with signature v2
if not request.use_signature_v2() and not self.fallback_to_signature_v2: # have not tried with v2 yet
debug(u'Falling back to signature v2')
self.fallback_to_signature_v2 = True
return fn(*args, **kwargs)
else:
# returned by DreamObjects on recv_file, which doesn't support signature v4. Retry with signature v2
if not request.use_signature_v2() and not self.fallback_to_signature_v2:
# have not tried with v2 yet
debug(u'Falling back to signature v2')
self.fallback_to_signature_v2 = True
return fn(*args, **kwargs)
return None
def _http_403_handler(self, request, response, fn, *args, **kwargs):
if 'data' in response and len(response['data']) > 0:
failureCode = getTextFromXml(response['data'], 'Code')
if failureCode == 'AccessDenied':
# traditional HTTP 403
message = getTextFromXml(response['data'], 'Message')
if message == 'AWS authentication requires a valid Date or x-amz-date header': # message from an Eucalyptus walrus server
if not request.use_signature_v2() and not self.fallback_to_signature_v2: # have not tried with v2 yet
debug(u'Falling back to signature v2')
self.fallback_to_signature_v2 = True
return fn(*args, **kwargs)
raise S3Error(response)
def send_request(self, request, retries = _max_retries):
if request.resource.get('bucket') \
and not request.use_signature_v2() \
and S3Request.region_map.get(request.resource['bucket'],
Config().bucket_location) == "US":
debug("===== Send_request inner request to determine the bucket region =====")
try:
s3_uri = S3Uri(u's3://' + request.resource['bucket'])
# "force_us_default" should prevent infinite recursivity because
# it will set the region_map dict.
region = self.get_bucket_location(s3_uri, force_us_default=True)
if region is not None:
S3Request.region_map[request.resource['bucket']] = region
debug("===== END send_request inner request to determine the bucket region (%r) =====",
region)
except Exception as exc:
# Ignore errors, it is just an optimisation, so nothing critical
debug("Error getlocation inner request: %s", exc)
request.body = encode_to_s3(request.body)
headers = request.headers
method_string, resource, headers = request.get_triplet()
response = {}
debug("Processing request, please wait...")
conn = None
try:
conn = ConnMan.get(self.get_hostname(resource['bucket']))
# TODO: Check what was supposed to be the usage of conn.path here
# Currently this is always "None" all the time as not defined in ConnMan
uri = self.format_uri(resource, conn.path)
debug("Sending request method_string=%r, uri=%r, headers=%r, body=(%i bytes)" % (method_string, uri, headers, len(request.body or "")))
conn.c.request(method_string, uri, request.body, headers)
http_response = conn.c.getresponse()
response["status"] = http_response.status
response["reason"] = http_response.reason
response["headers"] = convertHeaderTupleListToDict(http_response.getheaders())
response["data"] = http_response.read()
if "x-amz-meta-s3cmd-attrs" in response["headers"]:
attrs = parse_attrs_header(response["headers"]["x-amz-meta-s3cmd-attrs"])
response["s3cmd-attrs"] = attrs
ConnMan.put(conn)
except (IOError, Exception) as e:
debug("Response:\n" + pprint.pformat(response))
if ((hasattr(e, 'errno') and e.errno
and e.errno not in (errno.EPIPE, errno.ECONNRESET, errno.ETIMEDOUT))
or "[Errno 104]" in str(e)
or "[Errno 32]" in str(e)
) and not isinstance(e, SocketTimeoutException):
raise
# When the connection is broken, BadStatusLine is raised with py2
# and RemoteDisconnected is raised by py3 with a trap:
# RemoteDisconnected has an errno field with a None value.
if conn:
# close the connection and re-establish
conn.counter = ConnMan.conn_max_counter
ConnMan.put(conn)
if retries:
warning("Retrying failed request: %s (%s)" % (resource['uri'], e))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
return self.send_request(request, retries - 1)
else:
raise S3RequestError("Request failed for: %s" % resource['uri'])
except:
# Only KeyboardInterrupt and SystemExit will not be covered by Exception
debug("Response:\n" + pprint.pformat(response))
raise
debug("Response:\n" + pprint.pformat(response))
if response["status"] in [301, 307]:
## RedirectTemporary or RedirectPermanent
return self._http_redirection_handler(request, response, self.send_request, request)
if response["status"] == 400:
handler_fn = self._http_400_handler(request, response, self.send_request, request)
if handler_fn:
return handler_fn
err = S3Error(response)
if retries and err.code in ['BadDigest', 'OperationAborted',
'TokenRefreshRequired', 'RequestTimeout']:
warning(u"Retrying failed request: %s (%s)" % (resource['uri'], err))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
return self.send_request(request, retries - 1)
raise err
if response["status"] == 403:
return self._http_403_handler(request, response, self.send_request, request)
if response["status"] == 405: # Method Not Allowed. Don't retry.
raise S3Error(response)
if response["status"] >= 500:
e = S3Error(response)
if response["status"] == 501:
## NotImplemented server error - no need to retry
retries = 0
if retries:
warning(u"Retrying failed request: %s (%s)" % (resource['uri'], e))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
return self.send_request(request, retries - 1)
else:
raise e
if response["status"] < 200 or response["status"] > 299:
raise S3Error(response)
return response
def send_file(self, request, stream, labels, buffer = '', throttle = 0,
retries = _max_retries, offset = 0, chunk_size = -1,
use_expect_continue = None):
if request.resource.get('bucket') \
and not request.use_signature_v2() \
and S3Request.region_map.get(request.resource['bucket'],
Config().bucket_location) == "US":
debug("===== Send_file inner request to determine the bucket region =====")
try:
s3_uri = S3Uri(u's3://' + request.resource['bucket'])
# "force_us_default" should prevent infinite recursivity because
# it will set the region_map dict.
region = self.get_bucket_location(s3_uri, force_us_default=True)
if region is not None:
S3Request.region_map[request.resource['bucket']] = region
debug("===== END Send_file inner request to determine the bucket region (%r) =====",
region)
except Exception as exc:
# Ignore errors, it is just an optimisation, so nothing critical
debug("Error getlocation inner request: %s", exc)
if use_expect_continue is None:
use_expect_continue = self.config.use_http_expect
if self.expect_continue_not_supported and use_expect_continue:
use_expect_continue = False
headers = request.headers
size_left = size_total = int(headers["content-length"])
filename = stream.stream_name
if self.config.progress_meter:
labels[u'action'] = u'upload'
progress = self.config.progress_class(labels, size_total)
else:
info("Sending file '%s', please wait..." % filename)
timestamp_start = time.time()
if buffer:
sha256_hash = checksum_sha256_buffer(buffer, offset, size_total)
else:
sha256_hash = checksum_sha256_file(filename, offset, size_total)
request.body = sha256_hash
if use_expect_continue:
if not size_total:
use_expect_continue = False
else:
headers['expect'] = '100-continue'
method_string, resource, headers = request.get_triplet()
try:
conn = ConnMan.get(self.get_hostname(resource['bucket']))
conn.c.putrequest(method_string, self.format_uri(resource, conn.path))
for header in headers.keys():
conn.c.putheader(encode_to_s3(header), encode_to_s3(headers[header]))
conn.c.endheaders()
except ParameterError as e:
raise
except Exception as e:
if self.config.progress_meter:
progress.done("failed")
if retries:
warning("Retrying failed request: %s (%s)" % (resource['uri'], e))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
# Connection error -> same throttle value
return self.send_file(request, stream, labels, buffer, throttle, retries - 1, offset, chunk_size)
else:
raise S3UploadError("Upload failed for: %s" % resource['uri'])
if buffer == '':
stream.seek(offset)
md5_hash = md5()
try:
http_response = None
if use_expect_continue:
# Wait for the 100-Continue before sending the content
readable, writable, exceptional = select.select([conn.c.sock],[], [], EXPECT_CONTINUE_TIMEOUT)
if readable:
# 100-CONTINUE STATUS RECEIVED, get it before continuing.
http_response = conn.c.getresponse()
elif not writable and not exceptional:
warning("HTTP Expect Continue feature disabled because of no reply of the server in %.2fs.", EXPECT_CONTINUE_TIMEOUT)
self.expect_continue_not_supported = True
use_expect_continue = False
if not use_expect_continue or (http_response and http_response.status == ConnMan.CONTINUE):
if http_response:
# CONTINUE case. Reset the response
http_response.read()
conn.c._HTTPConnection__state = ConnMan._CS_REQ_SENT
while (size_left > 0):
#debug("SendFile: Reading up to %d bytes from '%s' - remaining bytes: %s" % (self.config.send_chunk, filename, size_left))
l = min(self.config.send_chunk, size_left)
if buffer == '':
data = stream.read(l)
else:
data = buffer
if self.config.limitrate > 0:
start_time = time.time()
md5_hash.update(data)
conn.c.wrapper_send_body(data)
if self.config.progress_meter:
progress.update(delta_position = len(data))
size_left -= len(data)
#throttle
limitrate_throttle = throttle
if self.config.limitrate > 0:
real_duration = time.time() - start_time
expected_duration = float(l) / self.config.limitrate
limitrate_throttle = max(expected_duration - real_duration, limitrate_throttle)
if limitrate_throttle:
time.sleep(min(limitrate_throttle, self.config.throttle_max))
md5_computed = md5_hash.hexdigest()
http_response = conn.c.getresponse()
response = {}
response["status"] = http_response.status
response["reason"] = http_response.reason
response["headers"] = convertHeaderTupleListToDict(http_response.getheaders())
response["data"] = http_response.read()
response["size"] = size_total
ConnMan.put(conn)
debug(u"Response:\n" + pprint.pformat(response))
except ParameterError as e:
raise
except Exception as e:
if self.config.progress_meter:
progress.done("failed")
if retries:
known_error = False
if ((hasattr(e, 'errno') and e.errno
and e.errno not in (errno.EPIPE, errno.ECONNRESET, errno.ETIMEDOUT))
or "[Errno 104]" in str(e) or "[Errno 32]" in str(e)
) and not isinstance(e, SocketTimeoutException):
# We have to detect these errors by looking at the error string
# Connection reset by peer and Broken pipe
# The server broke the connection early with an error like
# in a HTTP Expect Continue case even if asked nothing.
try:
http_response = conn.c.getresponse()
response = {}
response["status"] = http_response.status
response["reason"] = http_response.reason
response["headers"] = convertHeaderTupleListToDict(http_response.getheaders())
response["data"] = http_response.read()
response["size"] = size_total
known_error = True
except:
error("Cannot retrieve any response status before encountering an EPIPE or ECONNRESET exception")
if not known_error:
warning("Upload failed: %s (%s)" % (resource['uri'], e))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
# Connection error -> same throttle value
return self.send_file(request, stream, labels, buffer, throttle,
retries - 1, offset, chunk_size, use_expect_continue)
else:
debug("Giving up on '%s' %s" % (filename, e))
raise S3UploadError("Upload failed for: %s" % resource['uri'])
timestamp_end = time.time()
response["elapsed"] = timestamp_end - timestamp_start
response["speed"] = response["elapsed"] and float(response["size"]) / response["elapsed"] or float(-1)
if self.config.progress_meter:
## Finalising the upload takes some time -> update() progress meter
## to correct the average speed. Otherwise people will complain that
## 'progress' and response["speed"] are inconsistent ;-)
progress.update()
progress.done("done")
if response["status"] in [301, 307]:
## RedirectTemporary or RedirectPermanent
return self._http_redirection_handler(request, response,
self.send_file, request, stream, labels, buffer, offset = offset, chunk_size = chunk_size, use_expect_continue = use_expect_continue)
if response["status"] == 400:
handler_fn = self._http_400_handler(request, response,
self.send_file, request, stream, labels, buffer, offset = offset, chunk_size = chunk_size, use_expect_continue = use_expect_continue)
if handler_fn:
return handler_fn
err = S3Error(response)
if err.code not in ['BadDigest', 'OperationAborted',
'TokenRefreshRequired', 'RequestTimeout']:
raise err
# else the error will be handled later with a retry
if response["status"] == 403:
return self._http_403_handler(request, response,
self.send_file, request, stream, labels, buffer, offset = offset, chunk_size = chunk_size, use_expect_continue = use_expect_continue)
if response["status"] == 417 and retries:
# Expect 100-continue not supported by proxy/server
self.expect_continue_not_supported = True
return self.send_file(request, stream, labels, buffer, throttle,
retries - 1, offset, chunk_size, use_expect_continue = False)
# S3 from time to time doesn't send ETag back in a response :-(
# Force re-upload here.
if 'etag' not in response['headers']:
response['headers']['etag'] = ''
if response["status"] < 200 or response["status"] > 299:
try_retry = False
if response["status"] >= 500:
## AWS internal error - retry
try_retry = True
if response["status"] == 503:
## SlowDown error
throttle = throttle and throttle * 5 or 0.01
elif response["status"] >= 400:
err = S3Error(response)
## Retriable client error?
if err.code in ['BadDigest', 'OperationAborted', 'TokenRefreshRequired', 'RequestTimeout']:
try_retry = True
if try_retry:
if retries:
warning("Upload failed: %s (%s)" % (resource['uri'], S3Error(response)))
if throttle:
warning("Retrying on lower speed (throttle=%0.2f)" % throttle)
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
return self.send_file(request, stream, labels, buffer, throttle,
retries - 1, offset, chunk_size, use_expect_continue)
else:
warning("Too many failures. Giving up on '%s'" % (filename))
raise S3UploadError
## Non-recoverable error
raise S3Error(response)
debug("MD5 sums: computed=%s, received=%s" % (md5_computed, response["headers"].get('etag', '').strip('"\'')))
## when using KMS encryption, MD5 etag value will not match
md5_from_s3 = response["headers"].get("etag", "").strip('"\'')
if ('-' not in md5_from_s3) and (md5_from_s3 != md5_hash.hexdigest()) and response["headers"].get("x-amz-server-side-encryption") != 'aws:kms':
warning("MD5 Sums don't match!")
if retries:
warning("Retrying upload of %s" % (filename))
return self.send_file(request, stream, labels, buffer, throttle,
retries - 1, offset, chunk_size, use_expect_continue)
else:
warning("Too many failures. Giving up on '%s'" % (filename))
raise S3UploadError
return response
def send_file_multipart(self, stream, headers, uri, size, extra_label = ""):
timestamp_start = time.time()
upload = MultiPartUpload(self, stream, uri, headers)
upload.upload_all_parts(extra_label)
response = upload.complete_multipart_upload()
timestamp_end = time.time()
response["elapsed"] = timestamp_end - timestamp_start
response["size"] = size
response["speed"] = response["elapsed"] and float(response["size"]) / response["elapsed"] or float(-1)
if response["data"] and getRootTagName(response["data"]) == "Error":
#http://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadComplete.html
# Error Complete Multipart UPLOAD, status may be 200
# raise S3UploadError
raise S3UploadError(getTextFromXml(response["data"], 'Message'))
return response
def recv_file(self, request, stream, labels, start_position = 0, retries = _max_retries):
if request.resource.get('bucket') \
and not request.use_signature_v2() \
and S3Request.region_map.get(request.resource['bucket'],
Config().bucket_location) == "US":
debug("===== Recv_file inner request to determine the bucket region =====")
try:
s3_uri = S3Uri(u's3://' + request.resource['bucket'])
# "force_us_default" should prevent infinite recursivity because
# it will set the region_map dict.
region = self.get_bucket_location(s3_uri, force_us_default=True)
if region is not None:
S3Request.region_map[request.resource['bucket']] = region
debug("===== END recv_file Inner request to determine the bucket region (%r) =====",
region)
except Exception as exc:
# Ignore errors, it is just an optimisation, so nothing critical
debug("Error getlocation inner request: %s", exc)
method_string, resource, headers = request.get_triplet()
filename = stream.stream_name
if self.config.progress_meter:
labels[u'action'] = u'download'
progress = self.config.progress_class(labels, 0)
else:
info("Receiving file '%s', please wait..." % filename)
timestamp_start = time.time()
conn = None
try:
conn = ConnMan.get(self.get_hostname(resource['bucket']))
conn.c.putrequest(method_string, self.format_uri(resource, conn.path))
for header in headers.keys():
conn.c.putheader(encode_to_s3(header), encode_to_s3(headers[header]))
if start_position > 0:
debug("Requesting Range: %d .. end" % start_position)
conn.c.putheader("Range", "bytes=%d-" % start_position)
conn.c.endheaders()
response = {}
http_response = conn.c.getresponse()
response["status"] = http_response.status
response["reason"] = http_response.reason
response["headers"] = convertHeaderTupleListToDict(http_response.getheaders())
if "x-amz-meta-s3cmd-attrs" in response["headers"]:
attrs = parse_attrs_header(response["headers"]["x-amz-meta-s3cmd-attrs"])
response["s3cmd-attrs"] = attrs
debug("Response:\n" + pprint.pformat(response))
except ParameterError as e:
raise
except OSError as e:
raise
except (IOError, Exception) as e:
if self.config.progress_meter:
progress.done("failed")
if ((hasattr(e, 'errno') and e.errno and
e.errno not in (errno.EPIPE, errno.ECONNRESET, errno.ETIMEDOUT))
or "[Errno 104]" in str(e) or "[Errno 32]" in str(e)
) and not isinstance(e, SocketTimeoutException):
raise
if conn:
# close the connection and re-establish
conn.counter = ConnMan.conn_max_counter
ConnMan.put(conn)
if retries:
warning("Retrying failed request: %s (%s)" % (resource['uri'], e))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
# Connection error -> same throttle value
return self.recv_file(request, stream, labels, start_position, retries - 1)
else:
raise S3DownloadError("Download failed for: %s" % resource['uri'])
if response["status"] in [301, 307]:
## RedirectPermanent or RedirectTemporary
response['data'] = http_response.read()
return self._http_redirection_handler(request, response,
self.recv_file, request,
stream, labels, start_position)
if response["status"] == 400:
response['data'] = http_response.read()
handler_fn = self._http_400_handler(request, response, self.recv_file,
request, stream, labels, start_position)
if handler_fn:
return handler_fn
raise S3Error(response)
if response["status"] == 403:
response['data'] = http_response.read()
return self._http_403_handler(request, response, self.recv_file,
request, stream, labels, start_position)
if response["status"] == 405: # Method Not Allowed. Don't retry.
response['data'] = http_response.read()
raise S3Error(response)
if response["status"] < 200 or response["status"] > 299:
response['data'] = http_response.read()
raise S3Error(response)
if start_position == 0:
# Only compute MD5 on the fly if we're downloading from beginning
# Otherwise we'd get a nonsense.
md5_hash = md5()
size_left = int(response["headers"]["content-length"])
size_total = start_position + size_left
current_position = start_position
if self.config.progress_meter:
progress.total_size = size_total
progress.initial_position = current_position
progress.current_position = current_position
try:
# Fix for issue #432. Even when content size is 0, httplib expect the response to be read.
if size_left == 0:
data = http_response.read(1)
# It is not supposed to be some data returned in that case
assert(len(data) == 0)
while (current_position < size_total):
this_chunk = size_left > self.config.recv_chunk and self.config.recv_chunk or size_left
if self.config.limitrate > 0:
start_time = time.time()
data = http_response.read(this_chunk)
if len(data) == 0:
raise S3ResponseError("EOF from S3!")
#throttle
if self.config.limitrate > 0:
real_duration = time.time() - start_time
expected_duration = float(this_chunk) / self.config.limitrate
if expected_duration > real_duration:
time.sleep(expected_duration - real_duration)
stream.write(data)
if start_position == 0:
md5_hash.update(data)
current_position += len(data)
## Call progress meter from here...
if self.config.progress_meter:
progress.update(delta_position = len(data))
ConnMan.put(conn)
except OSError:
raise
except (IOError, Exception) as e:
if self.config.progress_meter:
progress.done("failed")
if ((hasattr(e, 'errno') and e.errno
and e.errno not in (errno.EPIPE, errno.ECONNRESET, errno.ETIMEDOUT))
or "[Errno 104]" in str(e) or "[Errno 32]" in str(e)
) and not isinstance(e, SocketTimeoutException):
raise
# close the connection and re-establish
conn.counter = ConnMan.conn_max_counter
ConnMan.put(conn)
if retries:
warning("Retrying failed request: %s (%s)" % (resource['uri'], e))
warning("Waiting %d sec..." % self._fail_wait(retries))
time.sleep(self._fail_wait(retries))
# Connection error -> same throttle value
return self.recv_file(request, stream, labels, current_position, retries - 1)
else:
raise S3DownloadError("Download failed for: %s" % resource['uri'])
stream.flush()
timestamp_end = time.time()
if self.config.progress_meter:
## The above stream.flush() may take some time -> update() progress meter
## to correct the average speed. Otherwise people will complain that
## 'progress' and response["speed"] are inconsistent ;-)
progress.update()
progress.done("done")
md5_from_s3 = response["headers"].get("etag", "").strip('"\'')
if not 'x-amz-meta-s3tools-gpgenc' in response["headers"]:
# we can't trust our stored md5 because we
# encrypted the file after calculating it but before
# uploading it.
try:
md5_from_s3 = response["s3cmd-attrs"]["md5"]
except KeyError:
pass
# we must have something to compare against to bother with the calculation
if '-' not in md5_from_s3:
if start_position == 0:
# Only compute MD5 on the fly if we were downloading from the beginning
response["md5"] = md5_hash.hexdigest()
else:
# Otherwise try to compute MD5 of the output file
try:
response["md5"] = hash_file_md5(filename)
except IOError as e:
if e.errno != errno.ENOENT:
warning("Unable to open file: %s: %s" % (filename, e))
warning("Unable to verify MD5. Assume it matches.")
response["md5match"] = response.get("md5") == md5_from_s3
response["elapsed"] = timestamp_end - timestamp_start
response["size"] = current_position
response["speed"] = response["elapsed"] and float(response["size"]) / response["elapsed"] or float(-1)
if response["size"] != start_position + int(response["headers"]["content-length"]):
warning("Reported size (%s) does not match received size (%s)" % (
start_position + int(response["headers"]["content-length"]), response["size"]))
debug("ReceiveFile: Computed MD5 = %s" % response.get("md5"))
# avoid ETags from multipart uploads that aren't the real md5
if ('-' not in md5_from_s3 and not response["md5match"]) and (response["headers"].get("x-amz-server-side-encryption") != 'aws:kms'):
warning("MD5 signatures do not match: computed=%s, received=%s" % (
response.get("md5"), md5_from_s3))
return response
__all__.append("S3")
def parse_attrs_header(attrs_header):
attrs = {}
for attr in attrs_header.split("/"):
key, val = attr.split(":")
attrs[key] = val
return attrs
def compute_content_md5(body):
m = md5(encode_to_s3(body))
base64md5 = base64.encodestring(m.digest())
base64md5 = decode_from_s3(base64md5)
if base64md5[-1] == '\n':
base64md5 = base64md5[0:-1]
return decode_from_s3(base64md5)
# vim:et:ts=4:sts=4:ai