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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) |
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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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