Current File : //lib/python2.7/site-packages/salt/utils/s3.py
# -*- coding: utf-8 -*-
'''
Connection library for Amazon S3
:depends: requests
'''
from __future__ import absolute_import, print_function, unicode_literals
# Import Python libs
import logging
# Import 3rd-party libs
try:
import requests
HAS_REQUESTS = True # pylint: disable=W0612
except ImportError:
HAS_REQUESTS = False # pylint: disable=W0612
# Import Salt libs
import salt.utils.aws
import salt.utils.files
import salt.utils.hashutils
import salt.utils.xmlutil as xml
from salt._compat import ElementTree as ET
from salt.exceptions import CommandExecutionError
from salt.ext.six.moves.urllib.parse import quote as _quote # pylint: disable=import-error,no-name-in-module
from salt.ext import six
log = logging.getLogger(__name__)
def query(key, keyid, method='GET', params=None, headers=None,
requesturl=None, return_url=False, bucket=None, service_url=None,
path='', return_bin=False, action=None, local_file=None,
verify_ssl=True, full_headers=False, kms_keyid=None,
location=None, role_arn=None, chunk_size=16384, path_style=False,
https_enable=True):
'''
Perform a query against an S3-like API. This function requires that a
secret key and the id for that key are passed in. For instance:
s3.keyid: GKTADJGHEIQSXMKKRBJ08H
s3.key: askdjghsdfjkghWupUjasdflkdfklgjsdfjajkghs
If keyid or key is not specified, an attempt to fetch them from EC2 IAM
metadata service will be made.
A service_url may also be specified in the configuration:
s3.service_url: s3.amazonaws.com
If a service_url is not specified, the default is s3.amazonaws.com. This
may appear in various documentation as an "endpoint". A comprehensive list
for Amazon S3 may be found at::
http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region
The service_url will form the basis for the final endpoint that is used to
query the service.
Path style can be enabled:
s3.path_style: True
This can be useful if you need to use salt with a proxy for an s3 compatible storage
You can use either https protocol or http protocol:
s3.https_enable: True
SSL verification may also be turned off in the configuration:
s3.verify_ssl: False
This is required if using S3 bucket names that contain a period, as
these will not match Amazon's S3 wildcard certificates. Certificate
verification is enabled by default.
A region may be specified:
s3.location: eu-central-1
If region is not specified, an attempt to fetch the region from EC2 IAM
metadata service will be made. Failing that, default is us-east-1
'''
if not HAS_REQUESTS:
log.error('There was an error: requests is required for s3 access')
if not headers:
headers = {}
if not params:
params = {}
if not service_url:
service_url = 's3.amazonaws.com'
if not bucket or path_style:
endpoint = service_url
else:
endpoint = '{0}.{1}'.format(bucket, service_url)
if path_style and bucket:
path = '{0}/{1}'.format(bucket, path)
# Try grabbing the credentials from the EC2 instance IAM metadata if available
if not key:
key = salt.utils.aws.IROLE_CODE
if not keyid:
keyid = salt.utils.aws.IROLE_CODE
if kms_keyid is not None and method in ('PUT', 'POST'):
headers['x-amz-server-side-encryption'] = 'aws:kms'
headers['x-amz-server-side-encryption-aws-kms-key-id'] = kms_keyid
if not location:
location = salt.utils.aws.get_location()
data = ''
fh = None
payload_hash = None
if method == 'PUT':
if local_file:
payload_hash = salt.utils.hashutils.get_hash(local_file, form='sha256')
if path is None:
path = ''
path = _quote(path)
if not requesturl:
requesturl = (('https' if https_enable else 'http')+'://{0}/{1}').format(endpoint, path)
headers, requesturl = salt.utils.aws.sig4(
method,
endpoint,
params,
data=data,
uri='/{0}'.format(path),
prov_dict={'id': keyid, 'key': key},
role_arn=role_arn,
location=location,
product='s3',
requesturl=requesturl,
headers=headers,
payload_hash=payload_hash,
)
log.debug('S3 Request: %s', requesturl)
log.debug('S3 Headers::')
log.debug(' Authorization: %s', headers['Authorization'])
if not data:
data = None
try:
if method == 'PUT':
if local_file:
fh = salt.utils.files.fopen(local_file, 'rb') # pylint: disable=resource-leakage
data = fh.read() # pylint: disable=resource-leakage
result = requests.request(method,
requesturl,
headers=headers,
data=data,
verify=verify_ssl,
stream=True,
timeout=300)
elif method == 'GET' and local_file and not return_bin:
result = requests.request(method,
requesturl,
headers=headers,
data=data,
verify=verify_ssl,
stream=True,
timeout=300)
else:
result = requests.request(method,
requesturl,
headers=headers,
data=data,
verify=verify_ssl,
timeout=300)
finally:
if fh is not None:
fh.close()
err_code = None
err_msg = None
if result.status_code >= 400:
# On error the S3 API response should contain error message
err_text = result.content or 'Unknown error'
log.debug(' Response content: %s', err_text)
# Try to get err info from response xml
try:
err_data = xml.to_dict(ET.fromstring(err_text))
err_code = err_data['Code']
err_msg = err_data['Message']
except (KeyError, ET.ParseError) as err:
log.debug(
'Failed to parse s3 err response. %s: %s',
type(err).__name__, err
)
err_code = 'http-{0}'.format(result.status_code)
err_msg = err_text
log.debug('S3 Response Status Code: %s', result.status_code)
if method == 'PUT':
if result.status_code != 200:
if local_file:
raise CommandExecutionError(
'Failed to upload from {0} to {1}. {2}: {3}'.format(
local_file, path, err_code, err_msg))
raise CommandExecutionError(
'Failed to create bucket {0}. {1}: {2}'.format(
bucket, err_code, err_msg))
if local_file:
log.debug('Uploaded from %s to %s', local_file, path)
else:
log.debug('Created bucket %s', bucket)
return
if method == 'DELETE':
if not six.text_type(result.status_code).startswith('2'):
if path:
raise CommandExecutionError(
'Failed to delete {0} from bucket {1}. {2}: {3}'.format(
path, bucket, err_code, err_msg))
raise CommandExecutionError(
'Failed to delete bucket {0}. {1}: {2}'.format(
bucket, err_code, err_msg))
if path:
log.debug('Deleted %s from bucket %s', path, bucket)
else:
log.debug('Deleted bucket %s', bucket)
return
# This can be used to save a binary object to disk
if local_file and method == 'GET':
if result.status_code < 200 or result.status_code >= 300:
raise CommandExecutionError(
'Failed to get file. {0}: {1}'.format(err_code, err_msg))
log.debug('Saving to local file: %s', local_file)
with salt.utils.files.fopen(local_file, 'wb') as out:
for chunk in result.iter_content(chunk_size=chunk_size):
out.write(chunk)
return 'Saved to local file: {0}'.format(local_file)
if result.status_code < 200 or result.status_code >= 300:
raise CommandExecutionError(
'Failed s3 operation. {0}: {1}'.format(err_code, err_msg))
# This can be used to return a binary object wholesale
if return_bin:
return result.content
if result.content:
items = ET.fromstring(result.content)
ret = []
for item in items:
ret.append(xml.to_dict(item))
if return_url is True:
return ret, requesturl
else:
if result.status_code != requests.codes.ok:
return
ret = {'headers': []}
if full_headers:
ret['headers'] = dict(result.headers)
else:
for header in result.headers:
ret['headers'].append(header.strip())
return ret
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