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Add cloudinary v1.11.0

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lib/cloudinary/poster/__init__.py Normal file
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# MIT licensed code copied from https://bitbucket.org/chrisatlee/poster
#
# Copyright (c) 2011 Chris AtLee
#
# 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, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following 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 MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS 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.
"""poster module
Support for streaming HTTP uploads, and multipart/form-data encoding
```poster.version``` is a 3-tuple of integers representing the version number.
New releases of poster will always have a version number that compares greater
than an older version of poster.
New in version 0.6."""
import cloudinary.poster.streaminghttp
import cloudinary.poster.encode
version = (0, 8, 2) # Thanks JP!

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# MIT licensed code copied from https://bitbucket.org/chrisatlee/poster
"""multipart/form-data encoding module
This module provides functions that faciliate encoding name/value pairs
as multipart/form-data suitable for a HTTP POST or PUT request.
multipart/form-data is the standard way to upload files over HTTP"""
__all__ = ['gen_boundary', 'encode_and_quote', 'MultipartParam',
'encode_string', 'encode_file_header', 'get_body_size', 'get_headers',
'multipart_encode']
try:
from io import UnsupportedOperation
except ImportError:
UnsupportedOperation = None
try:
import uuid
def gen_boundary():
"""Returns a random string to use as the boundary for a message"""
return uuid.uuid4().hex
except ImportError:
import random, sha
def gen_boundary():
"""Returns a random string to use as the boundary for a message"""
bits = random.getrandbits(160)
return sha.new(str(bits)).hexdigest()
import re, os, mimetypes
from cloudinary.compat import (PY3, string_types, to_bytes, to_string,
to_bytearray, quote_plus, advance_iterator)
try:
from email.header import Header
except ImportError:
# Python 2.4
from email.Header import Header
if PY3:
def encode_and_quote(data):
if data is None:
return None
return quote_plus(to_bytes(data))
else:
def encode_and_quote(data):
"""If ``data`` is unicode, return quote_plus(data.encode("utf-8")) otherwise return quote_plus(data)"""
if data is None:
return None
if isinstance(data, unicode):
data = data.encode("utf-8")
return quote_plus(data)
if PY3:
def _strify(s):
if s is None:
return None
elif isinstance(s, bytes):
return s
else:
try:
return to_bytes(s)
except AttributeError:
return to_bytes(str(s))
else:
def _strify(s):
"""If s is a unicode string, encode it to UTF-8 and return the results, otherwise return str(s), or None if s is None"""
if s is None:
return None
if isinstance(s, unicode):
return s.encode("utf-8")
return str(s)
class MultipartParam(object):
"""Represents a single parameter in a multipart/form-data request
``name`` is the name of this parameter.
If ``value`` is set, it must be a string or unicode object to use as the
data for this parameter.
If ``filename`` is set, it is what to say that this parameter's filename
is. Note that this does not have to be the actual filename any local file.
If ``filetype`` is set, it is used as the Content-Type for this parameter.
If unset it defaults to "text/plain; charset=utf8"
If ``filesize`` is set, it specifies the length of the file ``fileobj``
If ``fileobj`` is set, it must be a file-like object that supports
.read().
Both ``value`` and ``fileobj`` must not be set, doing so will
raise a ValueError assertion.
If ``fileobj`` is set, and ``filesize`` is not specified, then
the file's size will be determined first by stat'ing ``fileobj``'s
file descriptor, and if that fails, by seeking to the end of the file,
recording the current position as the size, and then by seeking back to the
beginning of the file.
``cb`` is a callable which will be called from iter_encode with (self,
current, total), representing the current parameter, current amount
transferred, and the total size.
"""
def __init__(self, name, value=None, filename=None, filetype=None,
filesize=None, fileobj=None, cb=None):
self.name = Header(name).encode()
self.value = _strify(value)
if filename is None:
self.filename = None
else:
if PY3:
byte_filename = filename.encode("ascii", "xmlcharrefreplace")
self.filename = to_string(byte_filename)
encoding = 'unicode_escape'
else:
if isinstance(filename, unicode):
# Encode with XML entities
self.filename = filename.encode("ascii", "xmlcharrefreplace")
else:
self.filename = str(filename)
encoding = 'string_escape'
self.filename = self.filename.encode(encoding).replace(to_bytes('"'), to_bytes('\\"'))
self.filetype = _strify(filetype)
self.filesize = filesize
self.fileobj = fileobj
self.cb = cb
if self.value is not None and self.fileobj is not None:
raise ValueError("Only one of value or fileobj may be specified")
if fileobj is not None and filesize is None:
# Try and determine the file size
try:
self.filesize = os.fstat(fileobj.fileno()).st_size
except (OSError, AttributeError, UnsupportedOperation):
try:
fileobj.seek(0, 2)
self.filesize = fileobj.tell()
fileobj.seek(0)
except:
raise ValueError("Could not determine filesize")
def __cmp__(self, other):
attrs = ['name', 'value', 'filename', 'filetype', 'filesize', 'fileobj']
myattrs = [getattr(self, a) for a in attrs]
oattrs = [getattr(other, a) for a in attrs]
return cmp(myattrs, oattrs)
def reset(self):
if self.fileobj is not None:
self.fileobj.seek(0)
elif self.value is None:
raise ValueError("Don't know how to reset this parameter")
@classmethod
def from_file(cls, paramname, filename):
"""Returns a new MultipartParam object constructed from the local
file at ``filename``.
``filesize`` is determined by os.path.getsize(``filename``)
``filetype`` is determined by mimetypes.guess_type(``filename``)[0]
``filename`` is set to os.path.basename(``filename``)
"""
return cls(paramname, filename=os.path.basename(filename),
filetype=mimetypes.guess_type(filename)[0],
filesize=os.path.getsize(filename),
fileobj=open(filename, "rb"))
@classmethod
def from_params(cls, params):
"""Returns a list of MultipartParam objects from a sequence of
name, value pairs, MultipartParam instances,
or from a mapping of names to values
The values may be strings or file objects, or MultipartParam objects.
MultipartParam object names must match the given names in the
name,value pairs or mapping, if applicable."""
if hasattr(params, 'items'):
params = params.items()
retval = []
for item in params:
if isinstance(item, cls):
retval.append(item)
continue
name, value = item
if isinstance(value, cls):
assert value.name == name
retval.append(value)
continue
if hasattr(value, 'read'):
# Looks like a file object
filename = getattr(value, 'name', None)
if filename is not None:
filetype = mimetypes.guess_type(filename)[0]
else:
filetype = None
retval.append(cls(name=name, filename=filename,
filetype=filetype, fileobj=value))
else:
retval.append(cls(name, value))
return retval
def encode_hdr(self, boundary):
"""Returns the header of the encoding of this parameter"""
boundary = encode_and_quote(boundary)
headers = ["--%s" % boundary]
if self.filename:
disposition = 'form-data; name="%s"; filename="%s"' % (self.name,
to_string(self.filename))
else:
disposition = 'form-data; name="%s"' % self.name
headers.append("Content-Disposition: %s" % disposition)
if self.filetype:
filetype = to_string(self.filetype)
else:
filetype = "text/plain; charset=utf-8"
headers.append("Content-Type: %s" % filetype)
headers.append("")
headers.append("")
return "\r\n".join(headers)
def encode(self, boundary):
"""Returns the string encoding of this parameter"""
if self.value is None:
value = self.fileobj.read()
else:
value = self.value
if re.search(to_bytes("^--%s$" % re.escape(boundary)), value, re.M):
raise ValueError("boundary found in encoded string")
return to_bytes(self.encode_hdr(boundary)) + value + b"\r\n"
def iter_encode(self, boundary, blocksize=4096):
"""Yields the encoding of this parameter
If self.fileobj is set, then blocks of ``blocksize`` bytes are read and
yielded."""
total = self.get_size(boundary)
current = 0
if self.value is not None:
block = self.encode(boundary)
current += len(block)
yield block
if self.cb:
self.cb(self, current, total)
else:
block = to_bytes(self.encode_hdr(boundary))
current += len(block)
yield block
if self.cb:
self.cb(self, current, total)
last_block = to_bytearray("")
encoded_boundary = "--%s" % encode_and_quote(boundary)
boundary_exp = re.compile(to_bytes("^%s$" % re.escape(encoded_boundary)),
re.M)
while True:
block = self.fileobj.read(blocksize)
if not block:
current += 2
yield to_bytes("\r\n")
if self.cb:
self.cb(self, current, total)
break
last_block += block
if boundary_exp.search(last_block):
raise ValueError("boundary found in file data")
last_block = last_block[-len(to_bytes(encoded_boundary))-2:]
current += len(block)
yield block
if self.cb:
self.cb(self, current, total)
def get_size(self, boundary):
"""Returns the size in bytes that this param will be when encoded
with the given boundary."""
if self.filesize is not None:
valuesize = self.filesize
else:
valuesize = len(self.value)
return len(self.encode_hdr(boundary)) + 2 + valuesize
def encode_string(boundary, name, value):
"""Returns ``name`` and ``value`` encoded as a multipart/form-data
variable. ``boundary`` is the boundary string used throughout
a single request to separate variables."""
return MultipartParam(name, value).encode(boundary)
def encode_file_header(boundary, paramname, filesize, filename=None,
filetype=None):
"""Returns the leading data for a multipart/form-data field that contains
file data.
``boundary`` is the boundary string used throughout a single request to
separate variables.
``paramname`` is the name of the variable in this request.
``filesize`` is the size of the file data.
``filename`` if specified is the filename to give to this field. This
field is only useful to the server for determining the original filename.
``filetype`` if specified is the MIME type of this file.
The actual file data should be sent after this header has been sent.
"""
return MultipartParam(paramname, filesize=filesize, filename=filename,
filetype=filetype).encode_hdr(boundary)
def get_body_size(params, boundary):
"""Returns the number of bytes that the multipart/form-data encoding
of ``params`` will be."""
size = sum(p.get_size(boundary) for p in MultipartParam.from_params(params))
return size + len(boundary) + 6
def get_headers(params, boundary):
"""Returns a dictionary with Content-Type and Content-Length headers
for the multipart/form-data encoding of ``params``."""
headers = {}
boundary = quote_plus(boundary)
headers['Content-Type'] = "multipart/form-data; boundary=%s" % boundary
headers['Content-Length'] = str(get_body_size(params, boundary))
return headers
class multipart_yielder:
def __init__(self, params, boundary, cb):
self.params = params
self.boundary = boundary
self.cb = cb
self.i = 0
self.p = None
self.param_iter = None
self.current = 0
self.total = get_body_size(params, boundary)
def __iter__(self):
return self
def __next__(self):
return self.next()
def next(self):
"""generator function to yield multipart/form-data representation
of parameters"""
if self.param_iter is not None:
try:
block = advance_iterator(self.param_iter)
self.current += len(block)
if self.cb:
self.cb(self.p, self.current, self.total)
return block
except StopIteration:
self.p = None
self.param_iter = None
if self.i is None:
raise StopIteration
elif self.i >= len(self.params):
self.param_iter = None
self.p = None
self.i = None
block = to_bytes("--%s--\r\n" % self.boundary)
self.current += len(block)
if self.cb:
self.cb(self.p, self.current, self.total)
return block
self.p = self.params[self.i]
self.param_iter = self.p.iter_encode(self.boundary)
self.i += 1
return advance_iterator(self)
def reset(self):
self.i = 0
self.current = 0
for param in self.params:
param.reset()
def multipart_encode(params, boundary=None, cb=None):
"""Encode ``params`` as multipart/form-data.
``params`` should be a sequence of (name, value) pairs or MultipartParam
objects, or a mapping of names to values.
Values are either strings parameter values, or file-like objects to use as
the parameter value. The file-like objects must support .read() and either
.fileno() or both .seek() and .tell().
If ``boundary`` is set, then it as used as the MIME boundary. Otherwise
a randomly generated boundary will be used. In either case, if the
boundary string appears in the parameter values a ValueError will be
raised.
If ``cb`` is set, it should be a callback which will get called as blocks
of data are encoded. It will be called with (param, current, total),
indicating the current parameter being encoded, the current amount encoded,
and the total amount to encode.
Returns a tuple of `datagen`, `headers`, where `datagen` is a
generator that will yield blocks of data that make up the encoded
parameters, and `headers` is a dictionary with the assoicated
Content-Type and Content-Length headers.
Examples:
>>> datagen, headers = multipart_encode( [("key", "value1"), ("key", "value2")] )
>>> s = "".join(datagen)
>>> assert "value2" in s and "value1" in s
>>> p = MultipartParam("key", "value2")
>>> datagen, headers = multipart_encode( [("key", "value1"), p] )
>>> s = "".join(datagen)
>>> assert "value2" in s and "value1" in s
>>> datagen, headers = multipart_encode( {"key": "value1"} )
>>> s = "".join(datagen)
>>> assert "value2" not in s and "value1" in s
"""
if boundary is None:
boundary = gen_boundary()
else:
boundary = quote_plus(boundary)
headers = get_headers(params, boundary)
params = MultipartParam.from_params(params)
return multipart_yielder(params, boundary, cb), headers

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# MIT licensed code copied from https://bitbucket.org/chrisatlee/poster
"""Streaming HTTP uploads module.
This module extends the standard httplib and urllib2 objects so that
iterable objects can be used in the body of HTTP requests.
In most cases all one should have to do is call :func:`register_openers()`
to register the new streaming http handlers which will take priority over
the default handlers, and then you can use iterable objects in the body
of HTTP requests.
**N.B.** You must specify a Content-Length header if using an iterable object
since there is no way to determine in advance the total size that will be
yielded, and there is no way to reset an interator.
Example usage:
>>> from StringIO import StringIO
>>> import urllib2, poster.streaminghttp
>>> opener = poster.streaminghttp.register_openers()
>>> s = "Test file data"
>>> f = StringIO(s)
>>> req = urllib2.Request("http://localhost:5000", f,
... {'Content-Length': str(len(s))})
"""
import sys, socket
from cloudinary.compat import httplib, urllib2, NotConnected
__all__ = ['StreamingHTTPConnection', 'StreamingHTTPRedirectHandler',
'StreamingHTTPHandler', 'register_openers']
if hasattr(httplib, 'HTTPS'):
__all__.extend(['StreamingHTTPSHandler', 'StreamingHTTPSConnection'])
class _StreamingHTTPMixin:
"""Mixin class for HTTP and HTTPS connections that implements a streaming
send method."""
def send(self, value):
"""Send ``value`` to the server.
``value`` can be a string object, a file-like object that supports
a .read() method, or an iterable object that supports a .next()
method.
"""
# Based on python 2.6's httplib.HTTPConnection.send()
if self.sock is None:
if self.auto_open:
self.connect()
else:
raise NotConnected()
# send the data to the server. if we get a broken pipe, then close
# the socket. we want to reconnect when somebody tries to send again.
#
# NOTE: we DO propagate the error, though, because we cannot simply
# ignore the error... the caller will know if they can retry.
if self.debuglevel > 0:
print("send:", repr(value))
try:
blocksize = 8192
if hasattr(value, 'read') :
if hasattr(value, 'seek'):
value.seek(0)
if self.debuglevel > 0:
print("sendIng a read()able")
data = value.read(blocksize)
while data:
self.sock.sendall(data)
data = value.read(blocksize)
elif hasattr(value, 'next'):
if hasattr(value, 'reset'):
value.reset()
if self.debuglevel > 0:
print("sendIng an iterable")
for data in value:
self.sock.sendall(data)
else:
self.sock.sendall(value)
except socket.error:
e = sys.exc_info()[1]
if e[0] == 32: # Broken pipe
self.close()
raise
class StreamingHTTPConnection(_StreamingHTTPMixin, httplib.HTTPConnection):
"""Subclass of `httplib.HTTPConnection` that overrides the `send()` method
to support iterable body objects"""
class StreamingHTTPRedirectHandler(urllib2.HTTPRedirectHandler):
"""Subclass of `urllib2.HTTPRedirectHandler` that overrides the
`redirect_request` method to properly handle redirected POST requests
This class is required because python 2.5's HTTPRedirectHandler does
not remove the Content-Type or Content-Length headers when requesting
the new resource, but the body of the original request is not preserved.
"""
handler_order = urllib2.HTTPRedirectHandler.handler_order - 1
# From python2.6 urllib2's HTTPRedirectHandler
def redirect_request(self, req, fp, code, msg, headers, newurl):
"""Return a Request or None in response to a redirect.
This is called by the http_error_30x methods when a
redirection response is received. If a redirection should
take place, return a new Request to allow http_error_30x to
perform the redirect. Otherwise, raise HTTPError if no-one
else should try to handle this url. Return None if you can't
but another Handler might.
"""
m = req.get_method()
if (code in (301, 302, 303, 307) and m in ("GET", "HEAD")
or code in (301, 302, 303) and m == "POST"):
# Strictly (according to RFC 2616), 301 or 302 in response
# to a POST MUST NOT cause a redirection without confirmation
# from the user (of urllib2, in this case). In practice,
# essentially all clients do redirect in this case, so we
# do the same.
# be conciliant with URIs containing a space
newurl = newurl.replace(' ', '%20')
newheaders = dict((k, v) for k, v in req.headers.items()
if k.lower() not in (
"content-length", "content-type")
)
return urllib2.Request(newurl,
headers=newheaders,
origin_req_host=req.get_origin_req_host(),
unverifiable=True)
else:
raise urllib2.HTTPError(req.get_full_url(), code, msg, headers, fp)
class StreamingHTTPHandler(urllib2.HTTPHandler):
"""Subclass of `urllib2.HTTPHandler` that uses
StreamingHTTPConnection as its http connection class."""
handler_order = urllib2.HTTPHandler.handler_order - 1
def http_open(self, req):
"""Open a StreamingHTTPConnection for the given request"""
return self.do_open(StreamingHTTPConnection, req)
def http_request(self, req):
"""Handle a HTTP request. Make sure that Content-Length is specified
if we're using an interable value"""
# Make sure that if we're using an iterable object as the request
# body, that we've also specified Content-Length
if req.has_data():
data = req.get_data()
if hasattr(data, 'read') or hasattr(data, 'next'):
if not req.has_header('Content-length'):
raise ValueError(
"No Content-Length specified for iterable body")
return urllib2.HTTPHandler.do_request_(self, req)
if hasattr(httplib, 'HTTPS'):
class StreamingHTTPSConnection(_StreamingHTTPMixin,
httplib.HTTPSConnection):
"""Subclass of `httplib.HTTSConnection` that overrides the `send()`
method to support iterable body objects"""
class StreamingHTTPSHandler(urllib2.HTTPSHandler):
"""Subclass of `urllib2.HTTPSHandler` that uses
StreamingHTTPSConnection as its http connection class."""
handler_order = urllib2.HTTPSHandler.handler_order - 1
def https_open(self, req):
return self.do_open(StreamingHTTPSConnection, req)
def https_request(self, req):
# Make sure that if we're using an iterable object as the request
# body, that we've also specified Content-Length
if req.has_data():
data = req.get_data()
if hasattr(data, 'read') or hasattr(data, 'next'):
if not req.has_header('Content-length'):
raise ValueError(
"No Content-Length specified for iterable body")
return urllib2.HTTPSHandler.do_request_(self, req)
def get_handlers():
handlers = [StreamingHTTPHandler, StreamingHTTPRedirectHandler]
if hasattr(httplib, "HTTPS"):
handlers.append(StreamingHTTPSHandler)
return handlers
def register_openers():
"""Register the streaming http handlers in the global urllib2 default
opener object.
Returns the created OpenerDirector object."""
opener = urllib2.build_opener(*get_handlers())
urllib2.install_opener(opener)
return opener