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98 lines
2.4 KiB
Python
98 lines
2.4 KiB
Python
from __future__ import absolute_import
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import binascii
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import codecs
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import os
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from io import BytesIO
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from .fields import RequestField
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from .packages import six
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from .packages.six import b
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writer = codecs.lookup("utf-8")[3]
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def choose_boundary():
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"""
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Our embarrassingly-simple replacement for mimetools.choose_boundary.
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"""
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boundary = binascii.hexlify(os.urandom(16))
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if not six.PY2:
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boundary = boundary.decode("ascii")
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return boundary
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def iter_field_objects(fields):
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"""
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Iterate over fields.
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Supports list of (k, v) tuples and dicts, and lists of
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:class:`~urllib3.fields.RequestField`.
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"""
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if isinstance(fields, dict):
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i = six.iteritems(fields)
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else:
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i = iter(fields)
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for field in i:
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if isinstance(field, RequestField):
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yield field
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else:
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yield RequestField.from_tuples(*field)
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def iter_fields(fields):
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"""
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.. deprecated:: 1.6
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Iterate over fields.
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The addition of :class:`~urllib3.fields.RequestField` makes this function
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obsolete. Instead, use :func:`iter_field_objects`, which returns
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:class:`~urllib3.fields.RequestField` objects.
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Supports list of (k, v) tuples and dicts.
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"""
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if isinstance(fields, dict):
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return ((k, v) for k, v in six.iteritems(fields))
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return ((k, v) for k, v in fields)
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def encode_multipart_formdata(fields, boundary=None):
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"""
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Encode a dictionary of ``fields`` using the multipart/form-data MIME format.
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:param fields:
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Dictionary of fields or list of (key, :class:`~urllib3.fields.RequestField`).
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:param boundary:
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If not specified, then a random boundary will be generated using
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:func:`urllib3.filepost.choose_boundary`.
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"""
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body = BytesIO()
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if boundary is None:
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boundary = choose_boundary()
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for field in iter_field_objects(fields):
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body.write(b("--%s\r\n" % (boundary)))
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writer(body).write(field.render_headers())
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data = field.data
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if isinstance(data, int):
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data = str(data) # Backwards compatibility
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if isinstance(data, six.text_type):
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writer(body).write(data)
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else:
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body.write(data)
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body.write(b"\r\n")
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body.write(b("--%s--\r\n" % (boundary)))
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content_type = str("multipart/form-data; boundary=%s" % boundary)
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return body.getvalue(), content_type
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