Mercurial > repos > shellac > sam_consensus_v3
view env/lib/python3.9/site-packages/boto/connection.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
| author | shellac |
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| date | Mon, 22 Mar 2021 18:12:50 +0000 |
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# Copyright (c) 2006-2012 Mitch Garnaat http://garnaat.org/ # Copyright (c) 2012 Amazon.com, Inc. or its affiliates. # Copyright (c) 2010 Google # Copyright (c) 2008 rPath, Inc. # Copyright (c) 2009 The Echo Nest Corporation # Copyright (c) 2010, Eucalyptus Systems, Inc. # Copyright (c) 2011, Nexenta Systems Inc. # All rights reserved. # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, dis- # tribute, sublicense, and/or sell copies of the Software, and to permit # persons to whom the Software is furnished to do so, subject to the fol- # lowing conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL- # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS # IN THE SOFTWARE. # # Parts of this code were copied or derived from sample code supplied by AWS. # The following notice applies to that code. # # This software code is made available "AS IS" without warranties of any # kind. You may copy, display, modify and redistribute the software # code either by itself or as incorporated into your code; provided that # you do not remove any proprietary notices. Your use of this software # code is at your own risk and you waive any claim against Amazon # Digital Services, Inc. or its affiliates with respect to your use of # this software code. (c) 2006 Amazon Digital Services, Inc. or its # affiliates. """ Handles basic connections to AWS """ from datetime import datetime import errno import os import random import re import socket import sys import time import xml.sax import copy from boto import auth from boto import auth_handler import boto import boto.utils import boto.handler import boto.cacerts from boto import config, UserAgent from boto.compat import six, http_client, urlparse, quote, encodebytes from boto.exception import AWSConnectionError from boto.exception import BotoClientError from boto.exception import BotoServerError from boto.exception import PleaseRetryException from boto.provider import Provider from boto.resultset import ResultSet HAVE_HTTPS_CONNECTION = False try: import ssl from boto import https_connection # Google App Engine runs on Python 2.5 so doesn't have ssl.SSLError. if hasattr(ssl, 'SSLError'): HAVE_HTTPS_CONNECTION = True except ImportError: pass try: import threading except ImportError: import dummy_threading as threading ON_APP_ENGINE = all(key in os.environ for key in ( 'USER_IS_ADMIN', 'CURRENT_VERSION_ID', 'APPLICATION_ID')) PORTS_BY_SECURITY = {True: 443, False: 80} DEFAULT_CA_CERTS_FILE = os.path.join(os.path.dirname(os.path.abspath(boto.cacerts.__file__)), "cacerts.txt") class HostConnectionPool(object): """ A pool of connections for one remote (host,port,is_secure). When connections are added to the pool, they are put into a pending queue. The _mexe method returns connections to the pool before the response body has been read, so they connections aren't ready to send another request yet. They stay in the pending queue until they are ready for another request, at which point they are returned to the pool of ready connections. The pool of ready connections is an ordered list of (connection,time) pairs, where the time is the time the connection was returned from _mexe. After a certain period of time, connections are considered stale, and discarded rather than being reused. This saves having to wait for the connection to time out if AWS has decided to close it on the other end because of inactivity. Thread Safety: This class is used only from ConnectionPool while it's mutex is held. """ def __init__(self): self.queue = [] def size(self): """ Returns the number of connections in the pool for this host. Some of the connections may still be in use, and may not be ready to be returned by get(). """ return len(self.queue) def put(self, conn): """ Adds a connection to the pool, along with the time it was added. """ self.queue.append((conn, time.time())) def get(self): """ Returns the next connection in this pool that is ready to be reused. Returns None if there aren't any. """ # Discard ready connections that are too old. self.clean() # Return the first connection that is ready, and remove it # from the queue. Connections that aren't ready are returned # to the end of the queue with an updated time, on the # assumption that somebody is actively reading the response. for _ in range(len(self.queue)): (conn, _) = self.queue.pop(0) if self._conn_ready(conn): return conn else: self.put(conn) return None def _conn_ready(self, conn): """ There is a nice state diagram at the top of http_client.py. It indicates that once the response headers have been read (which _mexe does before adding the connection to the pool), a response is attached to the connection, and it stays there until it's done reading. This isn't entirely true: even after the client is done reading, the response may be closed, but not removed from the connection yet. This is ugly, reading a private instance variable, but the state we care about isn't available in any public methods. """ if ON_APP_ENGINE: # Google AppEngine implementation of HTTPConnection doesn't contain # _HTTPConnection__response attribute. Moreover, it's not possible # to determine if given connection is ready. Reusing connections # simply doesn't make sense with App Engine urlfetch service. return False else: response = getattr(conn, '_HTTPConnection__response', None) return (response is None) or response.isclosed() def clean(self): """ Get rid of stale connections. """ # Note that we do not close the connection here -- somebody # may still be reading from it. while len(self.queue) > 0 and self._pair_stale(self.queue[0]): self.queue.pop(0) def _pair_stale(self, pair): """ Returns true of the (connection,time) pair is too old to be used. """ (_conn, return_time) = pair now = time.time() return return_time + ConnectionPool.STALE_DURATION < now class ConnectionPool(object): """ A connection pool that expires connections after a fixed period of time. This saves time spent waiting for a connection that AWS has timed out on the other end. This class is thread-safe. """ # # The amout of time between calls to clean. # CLEAN_INTERVAL = 5.0 # # How long before a connection becomes "stale" and won't be reused # again. The intention is that this time is less that the timeout # period that AWS uses, so we'll never try to reuse a connection # and find that AWS is timing it out. # # Experimentation in July 2011 shows that AWS starts timing things # out after three minutes. The 60 seconds here is conservative so # we should never hit that 3-minute timout. # STALE_DURATION = 60.0 def __init__(self): # Mapping from (host,port,is_secure) to HostConnectionPool. # If a pool becomes empty, it is removed. self.host_to_pool = {} # The last time the pool was cleaned. self.last_clean_time = 0.0 self.mutex = threading.Lock() ConnectionPool.STALE_DURATION = \ config.getfloat('Boto', 'connection_stale_duration', ConnectionPool.STALE_DURATION) def __getstate__(self): pickled_dict = copy.copy(self.__dict__) pickled_dict['host_to_pool'] = {} del pickled_dict['mutex'] return pickled_dict def __setstate__(self, dct): self.__init__() def size(self): """ Returns the number of connections in the pool. """ return sum(pool.size() for pool in self.host_to_pool.values()) def get_http_connection(self, host, port, is_secure): """ Gets a connection from the pool for the named host. Returns None if there is no connection that can be reused. It's the caller's responsibility to call close() on the connection when it's no longer needed. """ self.clean() with self.mutex: key = (host, port, is_secure) if key not in self.host_to_pool: return None return self.host_to_pool[key].get() def put_http_connection(self, host, port, is_secure, conn): """ Adds a connection to the pool of connections that can be reused for the named host. """ with self.mutex: key = (host, port, is_secure) if key not in self.host_to_pool: self.host_to_pool[key] = HostConnectionPool() self.host_to_pool[key].put(conn) def clean(self): """ Clean up the stale connections in all of the pools, and then get rid of empty pools. Pools clean themselves every time a connection is fetched; this cleaning takes care of pools that aren't being used any more, so nothing is being gotten from them. """ with self.mutex: now = time.time() if self.last_clean_time + self.CLEAN_INTERVAL < now: to_remove = [] for (host, pool) in self.host_to_pool.items(): pool.clean() if pool.size() == 0: to_remove.append(host) for host in to_remove: del self.host_to_pool[host] self.last_clean_time = now class HTTPRequest(object): def __init__(self, method, protocol, host, port, path, auth_path, params, headers, body): """Represents an HTTP request. :type method: string :param method: The HTTP method name, 'GET', 'POST', 'PUT' etc. :type protocol: string :param protocol: The http protocol used, 'http' or 'https'. :type host: string :param host: Host to which the request is addressed. eg. abc.com :type port: int :param port: port on which the request is being sent. Zero means unset, in which case default port will be chosen. :type path: string :param path: URL path that is being accessed. :type auth_path: string :param path: The part of the URL path used when creating the authentication string. :type params: dict :param params: HTTP url query parameters, with key as name of the param, and value as value of param. :type headers: dict :param headers: HTTP headers, with key as name of the header and value as value of header. :type body: string :param body: Body of the HTTP request. If not present, will be None or empty string (''). """ self.method = method self.protocol = protocol self.host = host self.port = port self.path = path if auth_path is None: auth_path = path self.auth_path = auth_path self.params = params # chunked Transfer-Encoding should act only on PUT request. if headers and 'Transfer-Encoding' in headers and \ headers['Transfer-Encoding'] == 'chunked' and \ self.method != 'PUT': self.headers = headers.copy() del self.headers['Transfer-Encoding'] else: self.headers = headers self.body = body def __str__(self): return (('method:(%s) protocol:(%s) host(%s) port(%s) path(%s) ' 'params(%s) headers(%s) body(%s)') % (self.method, self.protocol, self.host, self.port, self.path, self.params, self.headers, self.body)) def authorize(self, connection, **kwargs): if not getattr(self, '_headers_quoted', False): for key in self.headers: val = self.headers[key] if isinstance(val, six.text_type): safe = '!"#$%&\'()*+,/:;<=>?@[\\]^`{|}~ ' self.headers[key] = quote(val.encode('utf-8'), safe) setattr(self, '_headers_quoted', True) self.headers['User-Agent'] = UserAgent connection._auth_handler.add_auth(self, **kwargs) # I'm not sure if this is still needed, now that add_auth is # setting the content-length for POST requests. if 'Content-Length' not in self.headers: if 'Transfer-Encoding' not in self.headers or \ self.headers['Transfer-Encoding'] != 'chunked': self.headers['Content-Length'] = str(len(self.body)) class HTTPResponse(http_client.HTTPResponse): def __init__(self, *args, **kwargs): http_client.HTTPResponse.__init__(self, *args, **kwargs) self._cached_response = '' def read(self, amt=None): """Read the response. This method does not have the same behavior as http_client.HTTPResponse.read. Instead, if this method is called with no ``amt`` arg, then the response body will be cached. Subsequent calls to ``read()`` with no args **will return the cached response**. """ if amt is None: # The reason for doing this is that many places in boto call # response.read() and except to get the response body that they # can then process. To make sure this always works as they expect # we're caching the response so that multiple calls to read() # will return the full body. Note that this behavior only # happens if the amt arg is not specified. if not self._cached_response: self._cached_response = http_client.HTTPResponse.read(self) return self._cached_response else: return http_client.HTTPResponse.read(self, amt) class AWSAuthConnection(object): def __init__(self, host, aws_access_key_id=None, aws_secret_access_key=None, is_secure=True, port=None, proxy=None, proxy_port=None, proxy_user=None, proxy_pass=None, debug=0, https_connection_factory=None, path='/', provider='aws', security_token=None, suppress_consec_slashes=True, validate_certs=True, profile_name=None): """ :type host: str :param host: The host to make the connection to :keyword str aws_access_key_id: Your AWS Access Key ID (provided by Amazon). If none is specified, the value in your ``AWS_ACCESS_KEY_ID`` environmental variable is used. :keyword str aws_secret_access_key: Your AWS Secret Access Key (provided by Amazon). If none is specified, the value in your ``AWS_SECRET_ACCESS_KEY`` environmental variable is used. :keyword str security_token: The security token associated with temporary credentials issued by STS. Optional unless using temporary credentials. If none is specified, the environment variable ``AWS_SECURITY_TOKEN`` is used if defined. :type is_secure: boolean :param is_secure: Whether the connection is over SSL :type https_connection_factory: list or tuple :param https_connection_factory: A pair of an HTTP connection factory and the exceptions to catch. The factory should have a similar interface to L{http_client.HTTPSConnection}. :param str proxy: Address/hostname for a proxy server :type proxy_port: int :param proxy_port: The port to use when connecting over a proxy :type proxy_user: str :param proxy_user: The username to connect with on the proxy :type proxy_pass: str :param proxy_pass: The password to use when connection over a proxy. :type port: int :param port: The port to use to connect :type suppress_consec_slashes: bool :param suppress_consec_slashes: If provided, controls whether consecutive slashes will be suppressed in key paths. :type validate_certs: bool :param validate_certs: Controls whether SSL certificates will be validated or not. Defaults to True. :type profile_name: str :param profile_name: Override usual Credentials section in config file to use a named set of keys instead. """ self.suppress_consec_slashes = suppress_consec_slashes self.num_retries = 6 # Override passed-in is_secure setting if value was defined in config. if config.has_option('Boto', 'is_secure'): is_secure = config.getboolean('Boto', 'is_secure') self.is_secure = is_secure # Whether or not to validate server certificates. # The default is now to validate certificates. This can be # overridden in the boto config file are by passing an # explicit validate_certs parameter to the class constructor. self.https_validate_certificates = config.getbool( 'Boto', 'https_validate_certificates', validate_certs) if self.https_validate_certificates and not HAVE_HTTPS_CONNECTION: raise BotoClientError( "SSL server certificate validation is enabled in boto " "configuration, but Python dependencies required to " "support this feature are not available. Certificate " "validation is only supported when running under Python " "2.6 or later.") certs_file = config.get_value( 'Boto', 'ca_certificates_file', DEFAULT_CA_CERTS_FILE) if certs_file == 'system': certs_file = None self.ca_certificates_file = certs_file if port: self.port = port else: self.port = PORTS_BY_SECURITY[is_secure] self.handle_proxy(proxy, proxy_port, proxy_user, proxy_pass) # define exceptions from http_client that we want to catch and retry self.http_exceptions = (http_client.HTTPException, socket.error, socket.gaierror, http_client.BadStatusLine) # define subclasses of the above that are not retryable. self.http_unretryable_exceptions = [] if HAVE_HTTPS_CONNECTION: self.http_unretryable_exceptions.append( https_connection.InvalidCertificateException) # define values in socket exceptions we don't want to catch self.socket_exception_values = (errno.EINTR,) if https_connection_factory is not None: self.https_connection_factory = https_connection_factory[0] self.http_exceptions += https_connection_factory[1] else: self.https_connection_factory = None if (is_secure): self.protocol = 'https' else: self.protocol = 'http' self.host = host self.path = path # if the value passed in for debug if not isinstance(debug, six.integer_types): debug = 0 self.debug = config.getint('Boto', 'debug', debug) self.host_header = None # Timeout used to tell http_client how long to wait for socket timeouts. # Default is to leave timeout unchanged, which will in turn result in # the socket's default global timeout being used. To specify a # timeout, set http_socket_timeout in Boto config. Regardless, # timeouts will only be applied if Python is 2.6 or greater. self.http_connection_kwargs = {} if (sys.version_info[0], sys.version_info[1]) >= (2, 6): # If timeout isn't defined in boto config file, use 70 second # default as recommended by # http://docs.aws.amazon.com/amazonswf/latest/apireference/API_PollForActivityTask.html self.http_connection_kwargs['timeout'] = config.getint( 'Boto', 'http_socket_timeout', 70) if isinstance(provider, Provider): # Allow overriding Provider self.provider = provider else: self._provider_type = provider self.provider = Provider(self._provider_type, aws_access_key_id, aws_secret_access_key, security_token, profile_name) # Allow config file to override default host, port, and host header. if self.provider.host: self.host = self.provider.host if self.provider.port: self.port = self.provider.port if self.provider.host_header: self.host_header = self.provider.host_header self._pool = ConnectionPool() self._connection = (self.host, self.port, self.is_secure) self._last_rs = None self._auth_handler = auth.get_auth_handler( host, config, self.provider, self._required_auth_capability()) if getattr(self, 'AuthServiceName', None) is not None: self.auth_service_name = self.AuthServiceName self.request_hook = None def __repr__(self): return '%s:%s' % (self.__class__.__name__, self.host) def _required_auth_capability(self): return [] def _get_auth_service_name(self): return getattr(self._auth_handler, 'service_name') # For Sigv4, the auth_service_name/auth_region_name properties allow # the service_name/region_name to be explicitly set instead of being # derived from the endpoint url. def _set_auth_service_name(self, value): self._auth_handler.service_name = value auth_service_name = property(_get_auth_service_name, _set_auth_service_name) def _get_auth_region_name(self): return getattr(self._auth_handler, 'region_name') def _set_auth_region_name(self, value): self._auth_handler.region_name = value auth_region_name = property(_get_auth_region_name, _set_auth_region_name) def connection(self): return self.get_http_connection(*self._connection) connection = property(connection) def aws_access_key_id(self): return self.provider.access_key aws_access_key_id = property(aws_access_key_id) gs_access_key_id = aws_access_key_id access_key = aws_access_key_id def aws_secret_access_key(self): return self.provider.secret_key aws_secret_access_key = property(aws_secret_access_key) gs_secret_access_key = aws_secret_access_key secret_key = aws_secret_access_key def profile_name(self): return self.provider.profile_name profile_name = property(profile_name) def get_path(self, path='/'): # The default behavior is to suppress consecutive slashes for reasons # discussed at # https://groups.google.com/forum/#!topic/boto-dev/-ft0XPUy0y8 # You can override that behavior with the suppress_consec_slashes param. if not self.suppress_consec_slashes: return self.path + re.sub('^(/*)/', "\\1", path) pos = path.find('?') if pos >= 0: params = path[pos:] path = path[:pos] else: params = None if path[-1] == '/': need_trailing = True else: need_trailing = False path_elements = self.path.split('/') path_elements.extend(path.split('/')) path_elements = [p for p in path_elements if p] path = '/' + '/'.join(path_elements) if path[-1] != '/' and need_trailing: path += '/' if params: path = path + params return path def server_name(self, port=None): if not port: port = self.port if port == 80: signature_host = self.host else: # This unfortunate little hack can be attributed to # a difference in the 2.6 version of http_client. In old # versions, it would append ":443" to the hostname sent # in the Host header and so we needed to make sure we # did the same when calculating the V2 signature. In 2.6 # (and higher!) # it no longer does that. Hence, this kludge. if ((ON_APP_ENGINE and sys.version[:3] == '2.5') or sys.version[:3] in ('2.6', '2.7')) and port == 443: signature_host = self.host else: signature_host = '%s:%d' % (self.host, port) return signature_host def handle_proxy(self, proxy, proxy_port, proxy_user, proxy_pass): self.proxy = proxy self.proxy_port = proxy_port self.proxy_user = proxy_user self.proxy_pass = proxy_pass if 'http_proxy' in os.environ and not self.proxy: pattern = re.compile( '(?:http://)?' '(?:(?P<user>[\w\-\.]+):(?P<pass>.*)@)?' '(?P<host>[\w\-\.]+)' '(?::(?P<port>\d+))?' ) match = pattern.match(os.environ['http_proxy']) if match: self.proxy = match.group('host') self.proxy_port = match.group('port') self.proxy_user = match.group('user') self.proxy_pass = match.group('pass') else: if not self.proxy: self.proxy = config.get_value('Boto', 'proxy', None) if not self.proxy_port: self.proxy_port = config.get_value('Boto', 'proxy_port', None) if not self.proxy_user: self.proxy_user = config.get_value('Boto', 'proxy_user', None) if not self.proxy_pass: self.proxy_pass = config.get_value('Boto', 'proxy_pass', None) if not self.proxy_port and self.proxy: print("http_proxy environment variable does not specify " "a port, using default") self.proxy_port = self.port self.no_proxy = os.environ.get('no_proxy', '') or os.environ.get('NO_PROXY', '') self.use_proxy = (self.proxy is not None) def get_http_connection(self, host, port, is_secure): conn = self._pool.get_http_connection(host, port, is_secure) if conn is not None: return conn else: return self.new_http_connection(host, port, is_secure) def skip_proxy(self, host): if not self.no_proxy: return False if self.no_proxy == "*": return True hostonly = host hostonly = host.split(':')[0] for name in self.no_proxy.split(','): if name and (hostonly.endswith(name) or host.endswith(name)): return True return False def new_http_connection(self, host, port, is_secure): if host is None: host = self.server_name() # Make sure the host is really just the host, not including # the port number host = boto.utils.parse_host(host) http_connection_kwargs = self.http_connection_kwargs.copy() # Connection factories below expect a port keyword argument http_connection_kwargs['port'] = port # Override host with proxy settings if needed if self.use_proxy and not is_secure and \ not self.skip_proxy(host): host = self.proxy http_connection_kwargs['port'] = int(self.proxy_port) if is_secure: boto.log.debug( 'establishing HTTPS connection: host=%s, kwargs=%s', host, http_connection_kwargs) if self.use_proxy and not self.skip_proxy(host): connection = self.proxy_ssl(host, is_secure and 443 or 80) elif self.https_connection_factory: connection = self.https_connection_factory(host) elif self.https_validate_certificates and HAVE_HTTPS_CONNECTION: connection = https_connection.CertValidatingHTTPSConnection( host, ca_certs=self.ca_certificates_file, **http_connection_kwargs) else: connection = http_client.HTTPSConnection( host, **http_connection_kwargs) else: boto.log.debug('establishing HTTP connection: kwargs=%s' % http_connection_kwargs) if self.https_connection_factory: # even though the factory says https, this is too handy # to not be able to allow overriding for http also. connection = self.https_connection_factory( host, **http_connection_kwargs) else: connection = http_client.HTTPConnection( host, **http_connection_kwargs) if self.debug > 1: connection.set_debuglevel(self.debug) # self.connection must be maintained for backwards-compatibility # however, it must be dynamically pulled from the connection pool # set a private variable which will enable that if host.split(':')[0] == self.host and is_secure == self.is_secure: self._connection = (host, port, is_secure) # Set the response class of the http connection to use our custom # class. connection.response_class = HTTPResponse return connection def put_http_connection(self, host, port, is_secure, connection): self._pool.put_http_connection(host, port, is_secure, connection) def proxy_ssl(self, host=None, port=None): if host and port: host = '%s:%d' % (host, port) else: host = '%s:%d' % (self.host, self.port) # Seems properly to use timeout for connect too timeout = self.http_connection_kwargs.get("timeout") if timeout is not None: sock = socket.create_connection((self.proxy, int(self.proxy_port)), timeout) else: sock = socket.create_connection((self.proxy, int(self.proxy_port))) boto.log.debug("Proxy connection: CONNECT %s HTTP/1.0\r\n", host) sock.sendall("CONNECT %s HTTP/1.0\r\n" % host) sock.sendall("User-Agent: %s\r\n" % UserAgent) if self.proxy_user and self.proxy_pass: for k, v in self.get_proxy_auth_header().items(): sock.sendall("%s: %s\r\n" % (k, v)) # See discussion about this config option at # https://groups.google.com/forum/?fromgroups#!topic/boto-dev/teenFvOq2Cc if config.getbool('Boto', 'send_crlf_after_proxy_auth_headers', False): sock.sendall("\r\n") else: sock.sendall("\r\n") resp = http_client.HTTPResponse(sock, strict=True, debuglevel=self.debug) resp.begin() if resp.status != 200: # Fake a socket error, use a code that make it obvious it hasn't # been generated by the socket library raise socket.error(-71, "Error talking to HTTP proxy %s:%s: %s (%s)" % (self.proxy, self.proxy_port, resp.status, resp.reason)) # We can safely close the response, it duped the original socket resp.close() h = http_client.HTTPConnection(host) if self.https_validate_certificates and HAVE_HTTPS_CONNECTION: msg = "wrapping ssl socket for proxied connection; " if self.ca_certificates_file: msg += "CA certificate file=%s" % self.ca_certificates_file else: msg += "using system provided SSL certs" boto.log.debug(msg) key_file = self.http_connection_kwargs.get('key_file', None) cert_file = self.http_connection_kwargs.get('cert_file', None) sslSock = ssl.wrap_socket(sock, keyfile=key_file, certfile=cert_file, cert_reqs=ssl.CERT_REQUIRED, ca_certs=self.ca_certificates_file) cert = sslSock.getpeercert() hostname = self.host.split(':', 0)[0] if not https_connection.ValidateCertificateHostname(cert, hostname): raise https_connection.InvalidCertificateException( hostname, cert, 'hostname mismatch') else: # Fallback for old Python without ssl.wrap_socket if hasattr(http_client, 'ssl'): sslSock = http_client.ssl.SSLSocket(sock) else: sslSock = socket.ssl(sock, None, None) sslSock = http_client.FakeSocket(sock, sslSock) # This is a bit unclean h.sock = sslSock return h def prefix_proxy_to_path(self, path, host=None): path = self.protocol + '://' + (host or self.server_name()) + path return path def get_proxy_auth_header(self): auth = encodebytes(self.proxy_user + ':' + self.proxy_pass) return {'Proxy-Authorization': 'Basic %s' % auth} # For passing proxy information to other connection libraries, e.g. cloudsearch2 def get_proxy_url_with_auth(self): if not self.use_proxy: return None if self.proxy_user or self.proxy_pass: if self.proxy_pass: login_info = '%s:%s@' % (self.proxy_user, self.proxy_pass) else: login_info = '%s@' % self.proxy_user else: login_info = '' return 'http://%s%s:%s' % (login_info, self.proxy, str(self.proxy_port or self.port)) def set_host_header(self, request): try: request.headers['Host'] = \ self._auth_handler.host_header(self.host, request) except AttributeError: request.headers['Host'] = self.host.split(':', 1)[0] def set_request_hook(self, hook): self.request_hook = hook def _mexe(self, request, sender=None, override_num_retries=None, retry_handler=None): """ mexe - Multi-execute inside a loop, retrying multiple times to handle transient Internet errors by simply trying again. Also handles redirects. This code was inspired by the S3Utils classes posted to the boto-users Google group by Larry Bates. Thanks! """ boto.log.debug('Method: %s' % request.method) boto.log.debug('Path: %s' % request.path) boto.log.debug('Data: %s' % request.body) boto.log.debug('Headers: %s' % request.headers) boto.log.debug('Host: %s' % request.host) boto.log.debug('Port: %s' % request.port) boto.log.debug('Params: %s' % request.params) response = None body = None ex = None if override_num_retries is None: num_retries = config.getint('Boto', 'num_retries', self.num_retries) else: num_retries = override_num_retries i = 0 connection = self.get_http_connection(request.host, request.port, self.is_secure) # Convert body to bytes if needed if not isinstance(request.body, bytes) and hasattr(request.body, 'encode'): request.body = request.body.encode('utf-8') while i <= num_retries: # Use binary exponential backoff to desynchronize client requests. next_sleep = min(random.random() * (2 ** i), boto.config.get('Boto', 'max_retry_delay', 60)) try: # we now re-sign each request before it is retried boto.log.debug('Token: %s' % self.provider.security_token) request.authorize(connection=self) # Only force header for non-s3 connections, because s3 uses # an older signing method + bucket resource URLs that include # the port info. All others should be now be up to date and # not include the port. if 's3' not in self._required_auth_capability(): if not getattr(self, 'anon', False): if not request.headers.get('Host'): self.set_host_header(request) boto.log.debug('Final headers: %s' % request.headers) request.start_time = datetime.now() if callable(sender): response = sender(connection, request.method, request.path, request.body, request.headers) else: connection.request(request.method, request.path, request.body, request.headers) response = connection.getresponse() boto.log.debug('Response headers: %s' % response.getheaders()) location = response.getheader('location') # -- gross hack -- # http_client gets confused with chunked responses to HEAD requests # so I have to fake it out if request.method == 'HEAD' and getattr(response, 'chunked', False): response.chunked = 0 if callable(retry_handler): status = retry_handler(response, i, next_sleep) if status: msg, i, next_sleep = status if msg: boto.log.debug(msg) time.sleep(next_sleep) continue if response.status in [500, 502, 503, 504]: msg = 'Received %d response. ' % response.status msg += 'Retrying in %3.1f seconds' % next_sleep boto.log.debug(msg) body = response.read() if isinstance(body, bytes): body = body.decode('utf-8') elif response.status < 300 or response.status >= 400 or \ not location: # don't return connection to the pool if response contains # Connection:close header, because the connection has been # closed and default reconnect behavior may do something # different than new_http_connection. Also, it's probably # less efficient to try to reuse a closed connection. conn_header_value = response.getheader('connection') if conn_header_value == 'close': connection.close() else: self.put_http_connection(request.host, request.port, self.is_secure, connection) if self.request_hook is not None: self.request_hook.handle_request_data(request, response) return response else: scheme, request.host, request.path, \ params, query, fragment = urlparse(location) if query: request.path += '?' + query # urlparse can return both host and port in netloc, so if # that's the case we need to split them up properly if ':' in request.host: request.host, request.port = request.host.split(':', 1) msg = 'Redirecting: %s' % scheme + '://' msg += request.host + request.path boto.log.debug(msg) connection = self.get_http_connection(request.host, request.port, scheme == 'https') response = None continue except PleaseRetryException as e: boto.log.debug('encountered a retry exception: %s' % e) connection = self.new_http_connection(request.host, request.port, self.is_secure) response = e.response ex = e except self.http_exceptions as e: for unretryable in self.http_unretryable_exceptions: if isinstance(e, unretryable): boto.log.debug( 'encountered unretryable %s exception, re-raising' % e.__class__.__name__) raise boto.log.debug('encountered %s exception, reconnecting' % e.__class__.__name__) connection = self.new_http_connection(request.host, request.port, self.is_secure) ex = e time.sleep(next_sleep) i += 1 # If we made it here, it's because we have exhausted our retries # and stil haven't succeeded. So, if we have a response object, # use it to raise an exception. # Otherwise, raise the exception that must have already happened. if self.request_hook is not None: self.request_hook.handle_request_data(request, response, error=True) if response: raise BotoServerError(response.status, response.reason, body) elif ex: raise ex else: msg = 'Please report this exception as a Boto Issue!' raise BotoClientError(msg) def build_base_http_request(self, method, path, auth_path, params=None, headers=None, data='', host=None): path = self.get_path(path) if auth_path is not None: auth_path = self.get_path(auth_path) if params is None: params = {} else: params = params.copy() if headers is None: headers = {} else: headers = headers.copy() if self.host_header and not boto.utils.find_matching_headers('host', headers): headers['host'] = self.host_header host = host or self.host if self.use_proxy and not self.skip_proxy(host): if not auth_path: auth_path = path path = self.prefix_proxy_to_path(path, host) if self.proxy_user and self.proxy_pass and not self.is_secure: # If is_secure, we don't have to set the proxy authentication # header here, we did that in the CONNECT to the proxy. headers.update(self.get_proxy_auth_header()) return HTTPRequest(method, self.protocol, host, self.port, path, auth_path, params, headers, data) def make_request(self, method, path, headers=None, data='', host=None, auth_path=None, sender=None, override_num_retries=None, params=None, retry_handler=None): """Makes a request to the server, with stock multiple-retry logic.""" if params is None: params = {} http_request = self.build_base_http_request(method, path, auth_path, params, headers, data, host) return self._mexe(http_request, sender, override_num_retries, retry_handler=retry_handler) def close(self): """(Optional) Close any open HTTP connections. This is non-destructive, and making a new request will open a connection again.""" boto.log.debug('closing all HTTP connections') self._connection = None # compat field class AWSQueryConnection(AWSAuthConnection): APIVersion = '' ResponseError = BotoServerError def __init__(self, aws_access_key_id=None, aws_secret_access_key=None, is_secure=True, port=None, proxy=None, proxy_port=None, proxy_user=None, proxy_pass=None, host=None, debug=0, https_connection_factory=None, path='/', security_token=None, validate_certs=True, profile_name=None, provider='aws'): super(AWSQueryConnection, self).__init__( host, aws_access_key_id, aws_secret_access_key, is_secure, port, proxy, proxy_port, proxy_user, proxy_pass, debug, https_connection_factory, path, security_token=security_token, validate_certs=validate_certs, profile_name=profile_name, provider=provider) def _required_auth_capability(self): return [] def get_utf8_value(self, value): return boto.utils.get_utf8_value(value) def make_request(self, action, params=None, path='/', verb='GET'): http_request = self.build_base_http_request(verb, path, None, params, {}, '', self.host) if action: http_request.params['Action'] = action if self.APIVersion: http_request.params['Version'] = self.APIVersion return self._mexe(http_request) def build_list_params(self, params, items, label): if isinstance(items, six.string_types): items = [items] for i in range(1, len(items) + 1): params['%s.%d' % (label, i)] = items[i - 1] def build_complex_list_params(self, params, items, label, names): """Serialize a list of structures. For example:: items = [('foo', 'bar', 'baz'), ('foo2', 'bar2', 'baz2')] label = 'ParamName.member' names = ('One', 'Two', 'Three') self.build_complex_list_params(params, items, label, names) would result in the params dict being updated with these params:: ParamName.member.1.One = foo ParamName.member.1.Two = bar ParamName.member.1.Three = baz ParamName.member.2.One = foo2 ParamName.member.2.Two = bar2 ParamName.member.2.Three = baz2 :type params: dict :param params: The params dict. The complex list params will be added to this dict. :type items: list of tuples :param items: The list to serialize. :type label: string :param label: The prefix to apply to the parameter. :type names: tuple of strings :param names: The names associated with each tuple element. """ for i, item in enumerate(items, 1): current_prefix = '%s.%s' % (label, i) for key, value in zip(names, item): full_key = '%s.%s' % (current_prefix, key) params[full_key] = value # generics def get_list(self, action, params, markers, path='/', parent=None, verb='GET'): if not parent: parent = self response = self.make_request(action, params, path, verb) body = response.read() boto.log.debug(body) if not body: boto.log.error('Null body %s' % body) raise self.ResponseError(response.status, response.reason, body) elif response.status == 200: rs = ResultSet(markers) h = boto.handler.XmlHandler(rs, parent) if isinstance(body, six.text_type): body = body.encode('utf-8') xml.sax.parseString(body, h) return rs else: boto.log.error('%s %s' % (response.status, response.reason)) boto.log.error('%s' % body) raise self.ResponseError(response.status, response.reason, body) def get_object(self, action, params, cls, path='/', parent=None, verb='GET'): if not parent: parent = self response = self.make_request(action, params, path, verb) body = response.read() boto.log.debug(body) if not body: boto.log.error('Null body %s' % body) raise self.ResponseError(response.status, response.reason, body) elif response.status == 200: obj = cls(parent) h = boto.handler.XmlHandler(obj, parent) if isinstance(body, six.text_type): body = body.encode('utf-8') xml.sax.parseString(body, h) return obj else: boto.log.error('%s %s' % (response.status, response.reason)) boto.log.error('%s' % body) raise self.ResponseError(response.status, response.reason, body) def get_status(self, action, params, path='/', parent=None, verb='GET'): if not parent: parent = self response = self.make_request(action, params, path, verb) body = response.read() boto.log.debug(body) if not body: boto.log.error('Null body %s' % body) raise self.ResponseError(response.status, response.reason, body) elif response.status == 200: rs = ResultSet() h = boto.handler.XmlHandler(rs, parent) xml.sax.parseString(body, h) return rs.status else: boto.log.error('%s %s' % (response.status, response.reason)) boto.log.error('%s' % body) raise self.ResponseError(response.status, response.reason, body)